Initial replacement of Sokol shdc with a runtime compilation system

.gitattributes

@@ -1,3 +1 @@
-tools/sokol-shdc filter=lfs diff=lfs merge=lfs -text
-tools/sokol-shdc.exe filter=lfs diff=lfs merge=lfs -text
 *.bmp filter=lfs diff=lfs merge=lfs -text

.gitignore

@@ -1,4 +1,4 @@
 # Generated assets
-/.zig-cache
+.zig-cache
 /zig-out
-*.glsl.zig
+*.spv

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "ext/spirv-cross"]
+	path = ext/spirv-cross
+	url = https://github.com/KhronosGroup/SPIRV-Cross/

.vscode/settings.json

@@ -10,5 +10,17 @@
 		"editor.detectIndentation": false,
 		"editor.insertSpaces": false,
 		"editor.rulers": [120],
-	}
+	},
+
+	"files.exclude": {
+		"**/.git": true,
+		"**/.svn": true,
+		"**/.hg": true,
+		"**/CVS": true,
+		"**/.DS_Store": true,
+		"**/Thumbs.db": true,
+		"**/.zig-cache": true,
+		"zig-out": true,
+		".drone.yml": true,
+	},
 }

b64_dump.py

@@ -0,0 +1,29 @@
+#!/bin/python
+
+import sys
+import base64
+import struct
+
+def format_base64_to_u32(base64_string):
+    # Decode the Base64 string
+    decoded_bytes = base64.b64decode(base64_string)
+
+    # Interpret the bytes as a sequence of u32 values
+    u32_values = struct.unpack('I' * (len(decoded_bytes) // 4), decoded_bytes)
+
+    # Format the u32 values as C-style hex values
+    formatted_u32_values = ', '.join(f'0x{value:08x}' for value in u32_values)
+
+    # Split the formatted string into lines of 8 values each
+    lines = [', '.join(formatted_u32_values.split(', ')[i:i+8]) for i in range(0, len(u32_values), 8)]
+
+    # Print the formatted values
+    print(',\n'.join(lines))
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print(f"Usage: python {sys.argv[0]} <base64_string>")
+        sys.exit(1)
+
+    base64_string = sys.argv[1]
+    format_base64_to_u32(base64_string)

build.zig

@@ -6,34 +6,49 @@ pub fn build(b: *std.Build) !void {
 	const target = b.standardTargetOptions(.{});
 	const optimize = b.standardOptimizeOption(.{});
 
+	const sokol_dependency = b.dependency("sokol", .{
+		.target = target,
+		.optimize = optimize,
+	});
+
 	const coral_module = b.createModule(.{
 		.root_source_file = b.path("src/coral/coral.zig"),
 	});
 
-	const ona_module = add: {
+	const flow_module = b.createModule(.{
-		const sokol_dependency = b.dependency("sokol", .{
+		.root_source_file = b.path("src/flow/flow.zig"),
-			.target = target,
-			.optimize = optimize,
-		});
 
-		const module = b.addModule("ona", .{
+		.imports = &.{
-			.root_source_file = b.path("src/ona/ona.zig"),
+			.{
-
+				.name = "coral",
-			.imports = &.{
+				.module = coral_module,
-				.{
-					.name = "sokol",
-					.module = sokol_dependency.module("sokol"),
-				},
-
-				.{
-					.name = "coral",
-					.module = coral_module,
-				},
 			},
-		});
+		}
+	});
 
-		break: add module;
+	const ona_module = b.createModule(.{
-	};
+		.root_source_file = b.path("src/ona/ona.zig"),
+
+		.imports = &.{
+			.{
+				.name = "sokol",
+				.module = sokol_dependency.module("sokol"),
+			},
+
+			.{
+				.name = "coral",
+				.module = coral_module,
+			},
+
+			.{
+				.name = "flow",
+				.module = flow_module,
+			},
+		},
+	});
+
+	ona_module.addIncludePath(b.path("ext/"));
+	ona_module.linkLibrary(build_spirvcross(b, target, optimize));
 
 	b.step("test", "Run unit tests").dependOn(create: {
 		const tests = b.addTest(.{
@@ -46,92 +61,59 @@ pub fn build(b: *std.Build) !void {
 	});
 
 	b.installArtifact(add: {
-		const compile_step = b.addExecutable(.{
+		const exe = b.addExecutable(.{
 			.name = "main",
 			.root_source_file = b.path("src/main.zig"),
 			.target = target,
 			.optimize = optimize,
 		});
 
-		compile_step.root_module.addImport("ona", ona_module);
+		exe.root_module.addImport("ona", ona_module);
-		compile_step.root_module.addImport("coral", coral_module);
+		exe.root_module.addImport("coral", coral_module);
-		compile_step.linkLibC();
+		exe.linkLibC();
-		compile_step.linkSystemLibrary("SDL2");
+		exe.linkSystemLibrary("SDL2");
 
-		try depend_on_shaders(b, target, "src/ona/gfx/shaders/", &compile_step.step);
+		break: add exe;
-
-		break: add compile_step;
 	});
 }
 
-fn depend_on_shaders(
+fn build_spirvcross(
 	b: *std.Build,
 	target: std.Build.ResolvedTarget,
-	shader_dir_path: []const u8,
+	mode: std.builtin.OptimizeMode,
-	step: *std.Build.Step,
+) *std.Build.Step.Compile {
-) !void {
+	const dir = "ext/spirv-cross/";
-	var dir = try std.fs.cwd().openDir(shader_dir_path, .{ .iterate = true });
 
-	defer dir.close();
+	const sources = [_][]const u8{
-
+		"spirv_cross.cpp",
-	var walker = try dir.walk(b.allocator);
+		"spirv_parser.cpp",
-
+		"spirv_cross_parsed_ir.cpp",
-	defer walker.deinit();
+		"spirv_cfg.cpp",
-
+		"spirv_glsl.cpp",
-	const shdc_path = switch (builtin.os.tag) {
+		"spirv_msl.cpp",
-		.windows => "./tools/sokol-shdc.exe",
+		"spirv_hlsl.cpp",
-		.linux => "./tools/sokol-shdc",
+		"spirv_reflect.cpp",
-		else => @compileError("cannot compile sokol shaders on this platform"),
+		"spirv_cross_util.cpp",
+		"spirv_cross_c.cpp",
 	};
 
-	const path_buffer_max = 255;
+	const lib = b.addStaticLibrary(.{
-	var input_path_buffer = [_]u8{undefined} ** path_buffer_max;
+		.name = "spirvcross",
-	var output_path_buffer = [_]u8{undefined} ** path_buffer_max;
+		.target = target,
+		.optimize = mode,
+	});
 
-	const glsl = if (target.result.isDarwin()) "glsl410" else "glsl430";
+	switch (lib.rootModuleTarget().abi) {
-	const slang = glsl ++ ":metal_macos:hlsl5:glsl300es:wgsl";
+		.msvc => lib.linkLibC(),
-
+		else => lib.linkLibCpp(),
-	while (try walker.next()) |entry| {
-		if (entry.kind != .file or !std.mem.endsWith(u8, entry.path, ".glsl")) {
-			continue;
-		}
-
-		const input_path = try std.fmt.bufPrint(&input_path_buffer, "{s}{s}", .{shader_dir_path, entry.path});
-		const output_path = try std.fmt.bufPrint(&output_path_buffer, "{s}.zig", .{input_path});
-		const output = std.fs.path.basename(output_path);
-
-		dir.access(output, .{.mode = .read_only}) catch {
-			const cmd = b.addSystemCommand(&.{
-				shdc_path,
-				"-i",
-				input_path,
-				"-o",
-				output_path,
-				"-l",
-				slang,
-				"-f",
-				"sokol_zig",
-			});
-
-			step.dependOn(&cmd.step);
-
-			continue;
-		};
-
-		if ((try dir.statFile(entry.path)).mtime > (try dir.statFile(output)).mtime) {
-			const cmd = b.addSystemCommand(&.{
-				shdc_path,
-				"-i",
-				input_path,
-				"-o",
-				output_path,
-				"-l",
-				slang,
-				"-f",
-				"sokol_zig",
-			});
-
-			step.dependOn(&cmd.step);
-		}
 	}
+
+	inline for (sources) |src| {
+		lib.addCSourceFile(.{
+			.file = b.path(dir ++ src),
+			.flags = &.{"-fstrict-aliasing", "-DSPIRV_CROSS_C_API_GLSL", "-DSPIRV_CROSS_C_API_HLSL", "-DSPIRV_CROSS_C_API_MSL"},
+		});
+	}
+
+	return lib;
 }

build.zig.zon

@@ -1,17 +1,17 @@
 .{
-    .name = "Ona",
+	.name = "Ona",
-    .version = "0.0.1",
+	.version = "0.0.1",
-    .paths = .{
+	.paths = .{
-        "src",
+		"src",
-        "build.zig",
+		"build.zig",
-        "build.zig.zon",
+		"build.zig.zon",
 		"LICENSE",
 		"README.md",
-    },
+	},
-    .dependencies = .{
+	.dependencies = .{
-        .sokol = .{
+		.sokol = .{
-            .url = "git+https://github.com/floooh/sokol-zig.git#7c25767e51aa06dd5fb0684e4a8f2200d182ef27",
+			.url = "git+https://github.com/floooh/sokol-zig.git#7c25767e51aa06dd5fb0684e4a8f2200d182ef27",
 			.hash = "1220fa7f47fbaf2f1ed8c17fab2d23b6a85bcbbc4aa0b3802c90a3e8bf6fca1f8569",
-        },
+		},
-    },
+	},
 }

ext/spirv-cross

@@ -0,0 +1 @@
+Subproject commit 6fd1f75636b1c424b809ad8a84804654cf5ae48b

src/coral/coral.zig

@@ -1,7 +1,5 @@
 pub const ascii = @import("./ascii.zig");
 
-pub const dag = @import("./dag.zig");
-
 pub const files = @import("./files.zig");
 
 pub const hashes = @import("./hashes.zig");
@@ -16,296 +14,8 @@ pub const scalars = @import("./scalars.zig");
 
 pub const slices = @import("./slices.zig");
 
-pub const slots = @import("./slots.zig");
-
 pub const stack = @import("./stack.zig");
 
-pub const system = @import("./system.zig");
-
 pub const utf8 = @import("./utf8.zig");
 
 pub const vectors = @import("./vectors.zig");
-
-pub const World = @import("./World.zig");
-
-const std = @import("std");
-
-pub const ResourceOptions = struct {
-	thread_restriction: World.ThreadRestriction,
-	read_only: bool = false,
-};
-
-pub fn Read(comptime Value: type) type {
-	return Resource(Value, .{
-		.thread_restriction = .none,
-		.read_only = true,
-	});
-}
-
-pub fn ReadBlocking(comptime Value: type) type {
-	return Resource(Value, .{
-		.thread_restriction = .main,
-		.read_only = true,
-	});
-}
-
-pub fn Resource(comptime Value: type, comptime options: ResourceOptions) type {
-	const value_info = @typeInfo(Value);
-
-	const Qualified = switch (value_info) {
-		.Optional => @Type(.{
-			.Optional = .{
-				.child = .{
-					.Pointer = .{
-						.is_allowzero = false,
-						.sentinel = null,
-						.address_space = .generic,
-						.is_volatile = false,
-						.alignment = @alignOf(Value),
-						.size = .One,
-						.child = Value,
-						.is_const = options.read_only,
-					},
-				},
-			},
-		}),
-
-		else => @Type(.{
-			.Pointer = .{
-				.is_allowzero = false,
-				.sentinel = null,
-				.address_space = .generic,
-				.is_volatile = false,
-				.alignment = @alignOf(Value),
-				.size = .One,
-				.child = Value,
-				.is_const = options.read_only,
-			},
-		}),
-	};
-
-	return struct {
-		res: Qualified,
-
-		const Self = @This();
-
-		pub const State = struct {
-			res: Qualified,
-		};
-
-		pub fn bind(context: system.BindContext) std.mem.Allocator.Error!State {
-			const thread_restriction_name = switch (thread_restriction) {
-				.main => "main thread-restricted ",
-				.none => ""
-			};
-
-			const res = switch (options.read_only) {
-				true => (try context.register_read_only_resource_access(thread_restriction, Value)),
-				false => (try context.register_read_write_resource_access(thread_restriction, Value)),
-			};
-
-			return .{
-				.res = switch (value_info) {
-					.Optional => res,
-
-					else => res orelse {
-						@panic(std.fmt.comptimePrint("attempt to use {s}{s} {s} that has not yet been set", .{
-							thread_restriction_name,
-							if (options.read_only) "read-only" else "read-write",
-							@typeName(Value),
-						}));
-					},
-				},
-			};
-		}
-
-		pub fn init(state: *State) Self {
-			return .{
-				.res = state.res,
-			};
-		}
-
-		pub const thread_restriction = options.thread_restriction;
-	};
-}
-
-pub fn Write(comptime Value: type) type {
-	return Resource(Value, .{
-		.thread_restriction = .none,
-	});
-}
-
-pub fn WriteBlocking(comptime Value: type) type {
-	return Resource(Value, .{
-		.thread_restriction = .main,
-	});
-}
-
-fn parameter_type(comptime Value: type) *const system.Info.Parameter {
-	const has_state = @hasDecl(Value, "State");
-
-	if (@sizeOf(Value) == 0) {
-		@compileError("System parameters must have a non-zero size");
-	}
-
-	const parameters = struct {
-		fn bind(allocator: std.mem.Allocator, context: system.BindContext) std.mem.Allocator.Error!?*anyopaque {
-			if (has_state) {
-				const value_name = @typeName(Value);
-
-				if (!@hasDecl(Value, "bind")) {
-					@compileError(
-						"a `bind` declaration on " ++
-						value_name ++
-						" is requied for parameter types with a `State` declaration");
-				}
-
-				const bind_type = @typeInfo(@TypeOf(Value.bind));
-
-				if (bind_type != .Fn) {
-					@compileError("`bind` declaration on " ++ value_name ++ " must be a fn");
-				}
-
-				if (bind_type.Fn.params.len != 1 or bind_type.Fn.params[0].type.? != system.BindContext) {
-					@compileError(
-						"`bind` fn on " ++
-						value_name ++
-						" must accept " ++
-						@typeName(system.BindContext) ++
-						" as it's one and only argument");
-				}
-
-				const state = try allocator.create(Value.State);
-
-				state.* = switch (bind_type.Fn.return_type.?) {
-					Value.State => Value.bind(context),
-					std.mem.Allocator.Error!Value.State => try Value.bind(context),
-					else => @compileError(
-						"`bind` fn on " ++
-						@typeName(Value) ++
-						" must return " ++
-						@typeName(Value.State) ++
-						" or " ++
-						@typeName(std.mem.Allocator.Error!Value.State)),
-				};
-
-				return @ptrCast(state);
-			} else {
-				return null;
-			}
-		}
-
-		fn init(argument: *anyopaque, state: ?*anyopaque) void {
-			const value_name = @typeName(Value);
-
-			if (!@hasDecl(Value, "init")) {
-				@compileError("an `init` declaration on " ++ value_name ++ " is requied for parameter types");
-			}
-
-			const init_type = @typeInfo(@TypeOf(Value.init));
-
-			if (init_type != .Fn) {
-				@compileError("`init` declaration on " ++ value_name ++ " must be a fn");
-			}
-
-			if (init_type.Fn.return_type.? != Value) {
-				@compileError("`init` fn on " ++ value_name ++ " must return a " ++ value_name);
-			}
-
-			const concrete_argument = @as(*Value, @ptrCast(@alignCast(argument)));
-
-			if (has_state) {
-				if (init_type.Fn.params.len != 1 or init_type.Fn.params[0].type.? != *Value.State) {
-					@compileError("`init` fn on stateful " ++ value_name ++ " must accept a " ++ @typeName(*Value.State));
-				}
-
-				concrete_argument.* = Value.init(@ptrCast(@alignCast(state.?)));
-			} else {
-				if (init_type.Fn.params.len != 0) {
-					@compileError("`init` fn on statelss " ++ value_name ++ " cannot use parameters");
-				}
-
-				concrete_argument.* = Value.init();
-			}
-		}
-
-		fn unbind(allocator: std.mem.Allocator, state: ?*anyopaque) void {
-			if (@hasDecl(Value, "unbind")) {
-				if (has_state) {
-					const typed_state = @as(*Value.State, @ptrCast(@alignCast(state.?)));
-
-					Value.unbind(typed_state);
-					allocator.destroy(typed_state);
-				} else {
-					Value.unbind();
-				}
-			}
-		}
-	};
-
-	return comptime &.{
-		.thread_restriction = if (@hasDecl(Value, "thread_restriction")) Value.thread_restriction else .none,
-		.init = parameters.init,
-		.bind = parameters.bind,
-		.unbind = parameters.unbind,
-	};
-}
-
-pub fn system_fn(comptime call: anytype) *const system.Info {
-	const Call = @TypeOf(call);
-
-	const system_info = comptime generate: {
-		switch (@typeInfo(Call)) {
-			.Fn => |call_fn| {
-				if (call_fn.params.len > system.max_parameters) {
-					@compileError("number of parameters to `call` cannot be more than 16");
-				}
-
-				const systems = struct {
-					fn run(parameters: []const *const system.Info.Parameter, states: *const [system.max_parameters]?*anyopaque) anyerror!void {
-						var call_args = @as(std.meta.ArgsTuple(Call), undefined);
-
-						inline for (parameters, &call_args, states[0 .. parameters.len]) |parameter, *call_arg, state| {
-							parameter.init(call_arg, state);
-						}
-
-						switch (@typeInfo(call_fn.return_type.?)) {
-							.Void => @call(.auto, call, call_args),
-							.ErrorUnion => try @call(.auto, call, call_args),
-							else => @compileError("number of parameters to `call` must return void or !void"),
-						}
-					}
-				};
-
-				var parameters = @as([system.max_parameters]*const system.Info.Parameter, undefined);
-				var thread_restriction = World.ThreadRestriction.none;
-
-				for (0 .. call_fn.params.len) |index| {
-					const CallParam = call_fn.params[index].type.?;
-					const parameter = parameter_type(CallParam);
-
-					if (parameter.thread_restriction != .none) {
-						if (thread_restriction != .none and thread_restriction != parameter.thread_restriction) {
-							@compileError("a system may not have conflicting thread restrictions");
-						}
-
-						thread_restriction = parameter.thread_restriction;
-					}
-
-					parameters[index] = parameter;
-				}
-
-				break: generate &.{
-					.parameters = parameters,
-					.parameter_count = call_fn.params.len,
-					.execute = systems.run,
-					.thread_restriction = thread_restriction,
-				};
-			},
-
-			else => @compileError("parameter `call` must be a function"),
-		}
-	};
-
-	return system_info;
-}

src/coral/script/Chunk.zig

@@ -1,998 +0,0 @@
-const coral = @import("coral");
-
-const file = @import("../file.zig");
-
-const script = @import("../script.zig");
-
-const std = @import("std");
-
-const tokens = @import("./tokens.zig");
-
-const tree = @import("./tree.zig");
-
-name: *script.Object,
-arity: u8,
-opcodes: coral.Stack(Opcode),
-lines: coral.Stack(tokens.Line),
-cursor: usize,
-constants: coral.Stack(*script.Object),
-bindings: []?*script.Object,
-externals: *script.Object,
-
-const Compiler = struct {
-	chunk: *Self,
-	env: *script.Runtime,
-
-	fn compile_argument(self: *const Compiler, environment: *const tree.Environment, initial_argument: ?*const tree.Expr) script.Error!u8 {
-		// TODO: Exceeding 255 arguments will make the VM crash.
-		var maybe_argument = initial_argument;
-		var argument_count = @as(u8, 0);
-
-		while (maybe_argument) |argument| {
-			try self.compile_expression(environment, argument, null);
-
-			maybe_argument = argument.next;
-			argument_count += 1;
-		}
-
-		return argument_count;
-	}
-
-	fn compile_expression(self: *const Compiler, environment: *const tree.Environment, expression: *const tree.Expr, name: ?[]const u8) script.Error!void {
-		const number_format = coral.utf8.DecimalFormat{
-			.delimiter = "_",
-			.positive_prefix = .none,
-		};
-
-		switch (expression.kind) {
-			.nil_literal => try self.chunk.write(expression.line, .push_nil),
-			.true_literal => try self.chunk.write(expression.line, .push_true),
-			.false_literal => try self.chunk.write(expression.line, .push_false),
-
-			.number_literal => |literal| {
-				for (literal) |codepoint| {
-					if (codepoint == '.') {
-						return self.chunk.write(expression.line, .{
-							.push_const = try self.declare_float(number_format.parse(literal, script.Float) orelse unreachable),
-						});
-					}
-				}
-
-				try self.chunk.write(expression.line, .{
-					.push_const = try self.declare_fixed(number_format.parse(literal, script.Fixed) orelse unreachable),
-				});
-			},
-
-			.string_literal => |literal| {
-				try self.chunk.write(expression.line, .{.push_const = try self.declare_string(literal)});
-			},
-
-			.vector2 => |vector2| {
-				try self.compile_expression(environment, vector2.x, null);
-				try self.compile_expression(environment, vector2.y, null);
-				try self.chunk.write(expression.line, .push_vector2);
-			},
-
-			.vector3 => |vector3| {
-				try self.compile_expression(environment, vector3.x, null);
-				try self.compile_expression(environment, vector3.y, null);
-				try self.compile_expression(environment, vector3.z, null);
-				try self.chunk.write(expression.line, .push_vector3);
-			},
-
-			.string_template => {
-				var current_expression = expression.next orelse {
-					return self.chunk.write(expression.line, .{.push_const = try self.declare_string("")});
-				};
-
-				var component_count = @as(u8, 0);
-
-				while (true) {
-					try self.compile_expression(environment, current_expression, null);
-
-					component_count += 1;
-
-					current_expression = current_expression.next orelse {
-						return self.chunk.write(expression.line, .{.push_concat = component_count});
-					};
-				}
-			},
-
-			.symbol_literal => |literal| {
-				try self.chunk.write(expression.line, .{.push_const = try self.declare_symbol(literal)});
-			},
-
-			.table => |table| {
-				var entries = table.nodes();
-				var num_entries = @as(u16, 0);
-
-				while (entries.next()) |entry| {
-					try self.compile_expression(environment, entry.key, null);
-					try self.compile_expression(environment, entry.value, null);
-
-					num_entries = coral.scalars.add(num_entries, 1) orelse {
-						return self.env.raise(error.OutOfMemory, "too many initializer values", .{});
-					};
-				}
-
-				try self.chunk.write(expression.line, .{.push_table = num_entries});
-			},
-
-			.lambda_construct => |lambda_construct| {
-				var chunk = try Self.init(self.env, name orelse "<lambda>", lambda_construct.environment, &.{});
-
-				errdefer chunk.deinit(self.env);
-
-				if (lambda_construct.environment.capture_count == 0) {
-					try self.chunk.write(expression.line, .{.push_const = try self.declare_chunk(chunk)});
-				} else {
-					const lambda_captures = lambda_construct.environment.get_captures();
-					var index = lambda_captures.len;
-
-					while (index != 0) {
-						index -= 1;
-
-						try self.chunk.write(expression.line, switch (lambda_captures[index]) {
-							.declaration_index => |declaration_index| .{.push_local = declaration_index},
-							.capture_index => |capture_index| .{.push_binding = capture_index},
-						});
-					}
-
-					try self.chunk.write(expression.line, .{.push_const = try self.declare_chunk(chunk)});
-					try self.chunk.write(expression.line, .{.bind = lambda_construct.environment.capture_count});
-				}
-			},
-
-			.binary_op => |binary_op| {
-				try self.compile_expression(environment, binary_op.lhs_operand, null);
-				try self.compile_expression(environment, binary_op.rhs_operand, null);
-
-				try self.chunk.write(expression.line, switch (binary_op.operation) {
-					.addition => .add,
-					.subtraction => .sub,
-					.multiplication => .mul,
-					.divsion => .div,
-					.greater_equals_comparison => .cge,
-					.greater_than_comparison => .cgt,
-					.equals_comparison => .eql,
-					.less_than_comparison => .clt,
-					.less_equals_comparison => .cle,
-				});
-			},
-
-			.unary_op => |unary_op| {
-				try self.compile_expression(environment, unary_op.operand, null);
-
-				try self.chunk.write(expression.line, switch (unary_op.operation) {
-					.boolean_negation => .not,
-					.numeric_negation => .neg,
-				});
-			},
-
-			.invoke => |invoke| {
-				const argument_count = try self.compile_argument(environment, invoke.argument);
-
-				try self.compile_expression(environment, invoke.object, null);
-				try self.chunk.write(expression.line, .{.call = argument_count});
-			},
-
-			.group => |group| try self.compile_expression(environment, group, null),
-
-			.declaration_get => |declaration_get| {
-				if (get_local_index(environment, declaration_get.declaration)) |index| {
-					if (is_declaration_boxed(declaration_get.declaration)) {
-						try self.chunk.write(expression.line, .{.push_local = index});
-						try self.chunk.write(expression.line, .get_box);
-					} else {
-						try self.chunk.write(expression.line, .{.push_local = index});
-					}
-
-					return;
-				}
-
-				if (try get_binding_index(environment, declaration_get.declaration)) |index| {
-					try self.chunk.write(expression.line, .{.push_binding = index});
-
-					if (is_declaration_boxed(declaration_get.declaration)) {
-						try self.chunk.write(expression.line, .get_box);
-					}
-
-					return;
-				}
-
-				return self.env.raise(error.IllegalState, "local out of scope", .{});
-			},
-
-			.declaration_set => |declaration_set| {
-				if (get_local_index(environment, declaration_set.declaration)) |index| {
-					if (is_declaration_boxed(declaration_set.declaration)) {
-						try self.chunk.write(expression.line, .{.push_local = index});
-						try self.compile_expression(environment, declaration_set.assign, null);
-						try self.chunk.write(expression.line, .set_box);
-					} else {
-						try self.compile_expression(environment, declaration_set.assign, null);
-						try self.chunk.write(expression.line, .{.set_local = index});
-					}
-
-					return;
-				}
-
-				if (try get_binding_index(environment, declaration_set.declaration)) |index| {
-					try self.compile_expression(environment, declaration_set.assign, null);
-					try self.chunk.write(expression.line, .{.push_binding = index});
-
-					if (is_declaration_boxed(declaration_set.declaration)) {
-						try self.chunk.write(expression.line, .set_box);
-					}
-
-					return;
-				}
-
-				return self.env.raise(error.IllegalState, "local out of scope", .{});
-			},
-
-			.field_get => |field_get| {
-				try self.chunk.write(expression.line, .{.push_const = try self.declare_symbol(field_get.identifier)});
-				try self.compile_expression(environment, field_get.object, null);
-				try self.chunk.write(expression.line, .get_dynamic);
-			},
-
-			.field_set => |field_set| {
-				try self.chunk.write(expression.line, .{.push_const = try self.declare_symbol(field_set.identifier)});
-				try self.compile_expression(environment, field_set.assign, null);
-				try self.compile_expression(environment, field_set.object, null);
-				try self.chunk.write(expression.line, .set_dynamic);
-			},
-
-			.subscript_get => |subscript_get| {
-				try self.compile_expression(environment, subscript_get.index, null);
-				try self.compile_expression(environment, subscript_get.object, null);
-				try self.chunk.write(expression.line, .get_dynamic);
-			},
-
-			.subscript_set => |subscript_set| {
-				try self.compile_expression(environment, subscript_set.index, null);
-				try self.compile_expression(environment, subscript_set.assign, null);
-				try self.compile_expression(environment, subscript_set.object, null);
-				try self.chunk.write(expression.line, .set_dynamic);
-			},
-
-			.external_get => |external_get| {
-				try self.chunk.write(expression.line, .{.push_const = try self.declare_symbol(external_get.name)});
-				try self.chunk.write(expression.line, .get_external);
-			},
-		}
-	}
-
-	pub fn compile_environment(self: *const Compiler, environment: *const tree.Environment) script.Error!void {
-		if (environment.statement) |statement| {
-			const last_statement = try self.compile_statement(environment, statement);
-
-			if (last_statement.kind != .@"return") {
-				try self.chunk.write(last_statement.line, .push_nil);
-			}
-		}
-	}
-
-	fn compile_statement(self: *const Compiler, environment: *const tree.Environment, initial_statement: *const tree.Stmt) script.Error!*const tree.Stmt {
-		var current_statement = initial_statement;
-
-		while (true) {
-			switch (current_statement.kind) {
-				.@"return" => |@"return"| {
-					if (@"return".returned_expression) |expression| {
-						try self.compile_expression(environment, expression, null);
-					} else {
-						try self.chunk.write(current_statement.line, .push_nil);
-					}
-
-					// TODO: Omit ret calls at ends of chunk.
-					try self.chunk.write(current_statement.line, .ret);
-				},
-
-				.@"while" => |@"while"| {
-					try self.compile_expression(environment, @"while".loop_expression, null);
-					try self.chunk.write(current_statement.line, .{.jf = 0});
-
-					const origin_index = @as(u16, @intCast(self.chunk.opcodes.values.len - 1));
-
-					_ = try self.compile_statement(environment, @"while".loop);
-					self.chunk.opcodes.values[origin_index].jf = @intCast(self.chunk.opcodes.values.len - 1);
-
-					try self.compile_expression(environment, @"while".loop_expression, null);
-					try self.chunk.write(current_statement.line, .{.jt = origin_index});
-				},
-
-				.@"if" => |@"if"| {
-					try self.compile_expression(environment, @"if".then_expression, null);
-					try self.chunk.write(current_statement.line, .{.jf = 0});
-
-					const origin_index = @as(u16, @intCast(self.chunk.opcodes.values.len - 1));
-
-					_ = try self.compile_statement(environment, @"if".@"then");
-					self.chunk.opcodes.values[origin_index].jf = @intCast(self.chunk.opcodes.values.len - 1);
-
-					if (@"if".@"else") |@"else"| {
-						_ = try self.compile_statement(environment, @"else");
-					}
-				},
-
-				.declare => |declare| {
-					try self.compile_expression(environment, declare.initial_expression, declare.declaration.identifier);
-
-					if (is_declaration_boxed(declare.declaration)) {
-						try self.chunk.write(current_statement.line, .push_boxed);
-					}
-				},
-
-				.top_expression => |top_expression| {
-					try self.compile_expression(environment, top_expression, null);
-
-					if (top_expression.kind == .invoke) {
-						try self.chunk.write(current_statement.line, .pop);
-					}
-				},
-			}
-
-			current_statement = current_statement.next orelse return current_statement;
-		}
-	}
-
-	const constants_max = @as(usize, std.math.maxInt(u16));
-
-	fn declare_chunk(self: *const Compiler, chunk: Self) script.Error!u16 {
-		if (self.chunk.constants.values.len == std.math.maxInt(u16)) {
-			return self.env.raise(error.BadSyntax, "chunks cannot contain more than {max} constants", .{
-				.max = @as(usize, std.math.maxInt(u16)),
-			});
-		}
-
-		const constant = (try self.env.new_dynamic(chunk)).pop().?;
-
-		errdefer self.env.release(constant);
-
-		try self.chunk.constants.push(constant);
-
-		return @intCast(self.chunk.constants.values.len - 1);
-	}
-
-	fn declare_fixed(self: *const Compiler, fixed: script.Fixed) script.Error!u16 {
-		if (self.chunk.constants.values.len == constants_max) {
-			return self.env.raise(error.BadSyntax, "chunks cannot contain more than {max} constants", .{
-				.max = constants_max,
-			});
-		}
-
-		const constant = (try self.env.new_fixed(fixed)).pop().?;
-
-		errdefer self.env.release(constant);
-
-		try self.chunk.constants.push(constant);
-
-		return @intCast(self.chunk.constants.values.len - 1);
-	}
-
-	fn declare_float(self: *const Compiler, float: script.Float) script.Error!u16 {
-		if (self.chunk.constants.values.len == constants_max) {
-			return self.env.raise(error.BadSyntax, "chunks cannot contain more than {max} constants", .{
-				.max = constants_max,
-			});
-		}
-
-		const constant = (try self.env.new_float(float)).pop().?;
-
-		errdefer self.env.release(constant);
-
-		try self.chunk.constants.push(constant);
-
-		return @intCast(self.chunk.constants.values.len - 1);
-	}
-
-	fn declare_string(self: *const Compiler, string: []const u8) script.Error!u16 {
-		if (self.chunk.constants.values.len == constants_max) {
-			return self.env.raise(error.BadSyntax, "chunks cannot contain more than {max} constants", .{
-				.max = constants_max,
-			});
-		}
-
-		const constant = (try self.env.new_string(string)).pop().?;
-
-		errdefer self.env.release(constant);
-
-		try self.chunk.constants.push(constant);
-
-		return @intCast(self.chunk.constants.values.len - 1);
-	}
-
-	fn declare_vector2(self: *const Compiler, vector: script.Vector2) script.Error!u16 {
-		if (self.chunk.constants.values.len == constants_max) {
-			return self.env.raise(error.BadSyntax, "chunks cannot contain more than {max} constants", .{
-				.max = constants_max,
-			});
-		}
-
-		const constant = (try self.env.new_vector2(vector)).pop().?;
-
-		errdefer self.env.release(constant);
-
-		try self.chunk.constants.push(constant);
-
-		return @intCast(self.chunk.constants.values.len - 1);
-	}
-
-	fn declare_vector3(self: *const Compiler, vector: script.Vector3) script.Error!u16 {
-		if (self.chunk.constants.values.len == constants_max) {
-			return self.env.raise(error.BadSyntax, "chunks cannot contain more than {max} constants", .{
-				.max = constants_max,
-			});
-		}
-
-		const constant = (try self.env.new_vector3(vector)).pop().?;
-
-		errdefer self.env.release(constant);
-
-		try self.chunk.constants.push(constant);
-
-		return @intCast(self.chunk.constants.values.len - 1);
-	}
-
-	fn declare_symbol(self: *const Compiler, symbol: []const u8) script.Error!u16 {
-		if (self.chunk.constants.values.len == constants_max) {
-			return self.env.raise(error.BadSyntax, "chunks cannot contain more than {max} constants", .{
-				.max = constants_max,
-			});
-		}
-
-		const constant = (try self.env.new_symbol(symbol)).pop().?;
-
-		errdefer self.env.release(constant);
-
-		try self.chunk.constants.push(constant);
-
-		return @intCast(self.chunk.constants.values.len - 1);
-	}
-
-	fn get_binding_index(environment: *const tree.Environment, declaration: *const tree.Declaration) script.Error!?u8 {
-		var binding_index = @as(u8, 0);
-
-		while (binding_index < environment.capture_count) : (binding_index += 1) {
-			var capture = &environment.captures[binding_index];
-			var target_environment = environment.enclosing orelse return null;
-
-			while (capture.* == .capture_index) {
-				capture = &target_environment.captures[capture.capture_index];
-				target_environment = target_environment.enclosing orelse return null;
-			}
-
-			std.debug.assert(capture.* == .declaration_index);
-
-			if (&target_environment.declarations[capture.declaration_index] == declaration) {
-				return binding_index;
-			}
-		}
-
-		return null;
-	}
-
-	fn get_local_index(environment: *const tree.Environment, declaration: *const tree.Declaration) ?u8 {
-		var remaining = environment.declaration_count;
-
-		while (remaining != 0) {
-			remaining -= 1;
-
-			if (&environment.declarations[remaining] == declaration) {
-				return remaining;
-			}
-		}
-
-		return null;
-	}
-
-	fn is_declaration_boxed(declaration: *const tree.Declaration) bool {
-		return declaration.is.captured and !declaration.is.readonly;
-	}
-};
-
-pub const Opcode = union (enum) {
-	ret,
-	pop,
-	push_nil,
-	push_true,
-	push_false,
-	push_const: u16,
-	push_local: u8,
-	push_top,
-	push_vector2,
-	push_vector3,
-	push_table: u16,
-	push_binding: u8,
-	push_concat: u8,
-	push_boxed,
-	set_local: u8,
-	get_dynamic,
-	set_dynamic,
-	get_external,
-	get_box,
-	set_box,
-	call: u8,
-	bind: u8,
-
-	not,
-	neg,
-
-	add,
-	sub,
-	mul,
-	div,
-
-	eql,
-	cgt,
-	clt,
-	cge,
-	cle,
-
-	jt: u16,
-	jf: u16,
-};
-
-pub const External = struct {[]const u8, *script.Object};
-
-const Self = @This();
-
-pub fn deinit(self: *Self, env: *script.Runtime) void {
-	while (self.constants.pop()) |constant| {
-		env.release(constant.*);
-	}
-
-	self.constants.deinit();
-	self.opcodes.deinit();
-	self.lines.deinit();
-	env.release(self.name);
-	env.release(self.externals);
-
-	if (self.bindings.len != 0) {
-		for (self.bindings) |binding| {
-			if (binding) |value| {
-				env.release(value);
-			}
-		}
-
-		env.allocator.free(self.bindings);
-	}
-
-	self.bindings = &.{};
-}
-
-pub fn dump(chunk: Self, env: *script.Runtime) script.Error!*script.Object {
-	var opcode_cursor = @as(u32, 0);
-	var buffer = coral.list.ByteStack.init(env.allocator);
-
-	defer buffer.deinit();
-
-	const writer = coral.list.stack_as_writer(&buffer);
-
-	_ = coral.utf8.print_string(writer, "\n");
-
-	while (opcode_cursor < chunk.opcodes.values.len) : (opcode_cursor += 1) {
-		_ = coral.utf8.print_formatted(writer, "[{instruction}]: ", .{.instruction = opcode_cursor});
-
-		_ = switch (chunk.opcodes.values[opcode_cursor]) {
-			.ret => coral.utf8.print_string(writer, "ret\n"),
-			.pop => coral.utf8.print_string(writer, "pop\n"),
-			.push_nil => coral.utf8.print_string(writer, "push nil\n"),
-			.push_true => coral.utf8.print_string(writer, "push true\n"),
-			.push_false => coral.utf8.print_string(writer, "push false\n"),
-
-			.push_const => |push_const| print: {
-				const string_ref = (try (try env.push(try chunk.get_constant(env, push_const))).to_string()).pop().?;
-
-				defer env.release(string_ref);
-
-				const string = string_ref.is_string();
-
-				break: print coral.utf8.print_formatted(writer, "push const ({value})\n", .{.value = string.?});
-			},
-
-			.push_local => |push_local| coral.utf8.print_formatted(writer, "push local ({local})\n", .{
-				.local = push_local,
-			}),
-
-			.push_top => coral.utf8.print_string(writer, "push top\n"),
-
-			.push_table => |push_table| coral.utf8.print_formatted(writer, "push table ({count})\n", .{
-				.count = push_table,
-			}),
-
-			.push_boxed => coral.utf8.print_string(writer, "push boxed\n"),
-
-			.push_binding => |push_binding| coral.utf8.print_formatted(writer, "push binding ({binding})\n", .{
-				.binding = push_binding,
-			}),
-
-			.push_concat => |push_concat| coral.utf8.print_formatted(writer, "push concat ({count})\n", .{
-				.count = push_concat,
-			}),
-
-			.push_builtin => |push_builtin| coral.utf8.print_formatted(writer, "push builtin ({builtin})\n", .{
-				.builtin = switch (push_builtin) {
-					.import => "import",
-					.print => "print",
-					.vec2 => "vec2",
-					.vec3 => "vec3",
-				},
-			}),
-
-			.bind => |bind| coral.utf8.print_formatted(writer, "bind ({count})\n", .{
-				.count = bind,
-			}),
-
-			.set_local => |local_set| coral.utf8.print_formatted(writer, "set local ({local})\n", .{
-				.local = local_set,
-			}),
-
-			.get_box => coral.utf8.print_string(writer, "get box\n"),
-			.set_box => coral.utf8.print_string(writer, "set box\n"),
-			.get_dynamic => coral.utf8.print_string(writer, "get dynamic\n"),
-			.set_dynamic => coral.utf8.print_string(writer, "set dynamic\n"),
-			.call => |call| coral.utf8.print_formatted(writer, "call ({count})\n", .{.count = call}),
-			.not => coral.utf8.print_string(writer, "not\n"),
-			.neg => coral.utf8.print_string(writer, "neg\n"),
-			.add => coral.utf8.print_string(writer, "add\n"),
-			.sub => coral.utf8.print_string(writer, "sub\n"),
-			.mul => coral.utf8.print_string(writer, "mul\n"),
-			.div => coral.utf8.print_string(writer, "div\n"),
-			.eql => coral.utf8.print_string(writer, "eql\n"),
-			.cgt => coral.utf8.print_string(writer, "cgt\n"),
-			.clt => coral.utf8.print_string(writer, "clt\n"),
-			.cge => coral.utf8.print_string(writer, "cge\n"),
-			.cle => coral.utf8.print_string(writer, "cle\n"),
-			.jf => |jf| coral.utf8.print_formatted(writer, "jf ({instruction})\n", .{.instruction = jf}),
-			.jt => |jt| coral.utf8.print_formatted(writer, "jt ({instruction})\n", .{.instruction = jt}),
-		};
-	}
-
-	return (try env.new_string(buffer.values)).pop().?;
-}
-
-pub fn execute(self: *Self, env: *script.Runtime) script.Error!?*script.Object {
-	self.cursor = 0;
-
-	while (self.cursor < self.opcodes.values.len) : (self.cursor += 1) {
-		switch (self.opcodes.values[self.cursor]) {
-			.ret => break,
-			.pop => env.discard(),
-			.push_nil => _ = try env.push(null),
-			.push_true => _ = try env.new_boolean(true),
-			.push_false => _ = try env.new_boolean(false),
-			.push_const => |push_const| _ = try env.push(try self.get_constant(env, push_const)),
-			.push_local => |push_local| _ = try env.local_get(push_local),
-			.push_top => _ = try env.local_top(),
-
-			.push_vector2 => {
-				const y = try env.expect_float(try env.expect_object(env.pop()));
-				const x = try env.expect_float(try env.expect_object(env.pop()));
-
-				_ = try env.new_vector2(.{@floatCast(x), @floatCast(y)});
-			},
-
-			.push_vector3 => {
-				const z = try env.expect_float(try env.expect_object(env.pop()));
-				const y = try env.expect_float(try env.expect_object(env.pop()));
-				const x = try env.expect_float(try env.expect_object(env.pop()));
-
-				_ =  try env.new_vector3(.{@floatCast(x), @floatCast(y), @floatCast(z)});
-			},
-
-			.push_table => |push_table| {
-				const table = (try env.new_table()).pop().?;
-
-				defer env.release(table);
-
-				var popped = @as(usize, 0);
-
-				while (popped < push_table) : (popped += 1) {
-					if (env.pop()) |object| {
-						defer env.release(object);
-
-						try env.index_set(table, object);
-					} else {
-						env.release(try env.expect_object(env.pop()));
-					}
-				}
-
-				_ = try env.push(table);
-			},
-
-			.push_boxed => {
-				const value = env.pop();
-
-				defer {
-					if (value) |object| {
-						env.release(object);
-					}
-				}
-
-				_ = try env.new_boxed(value);
-			},
-
-			.push_binding => |push_binding| _ = try env.push(try self.get_binding(env, push_binding)),
-			.push_concat => |push_concat| _ = try env.concat(push_concat),
-
-			.bind => |bind| {
-				const callable = try env.expect_object(env.pop());
-
-				defer env.release(callable);
-
-				const chunk = try env.expect_dynamic(callable, Self);
-
-				if (chunk.bindings.len != 0) {
-					return env.raise(error.IllegalState, "cannot bind values to an already-bound chunk", .{});
-				}
-
-				chunk.bindings = try env.allocator.alloc(?*script.Object, bind);
-
-				errdefer env.allocator.free(chunk.bindings);
-
-				for (0 .. bind) |index| {
-					const value = env.pop();
-
-					errdefer {
-						if (value) |object| {
-							env.release(object);
-						}
-					}
-
-					chunk.bindings[index] = value;
-				}
-
-				_ = try env.push(callable);
-			},
-
-			.set_local => |local_set| _ = try env.local_set(local_set, env.pop()),
-			.get_box => _ = try env.boxed_get(),
-
-			.set_box => {
-				const value = env.pop();
-
-				defer {
-					if (value) |object| {
-						env.release(object);
-					}
-				}
-
-				try env.boxed_set(value);
-			},
-
-			.get_dynamic => {
-				const indexable = try env.expect_object(env.pop());
-
-				defer env.release(indexable);
-
-				_ = try env.index_get(indexable);
-			},
-
-			.set_dynamic => {
-				const indexable = try env.expect_object(env.pop());
-
-				defer env.release(indexable);
-
-				const value = env.pop();
-
-				defer {
-					if (value) |object| {
-						env.release(object);
-					}
-				}
-
-				try env.index_set(indexable, value);
-			},
-
-			.get_external => _ = try env.index_get(self.externals),
-			.call => |call| _ = try env.call(call),
-
-			.not => {
-				const object = try env.expect_object(env.pop());
-
-				defer env.release(object);
-
-				_ = try env.new_boolean(object.is_false());
-			},
-
-			.neg => _ = try env.neg(),
-
-			.add => {
-				const addable = try env.expect_object(env.pop());
-
-				defer env.release(addable);
-
-				_ = switch (try env.expect_numeric(addable)) {
-					.fixed => |fixed| try env.fixed_add(fixed),
-					.float => |float| try env.float_add(float),
-					.vector2 => |vector2| try env.vector2_add(vector2),
-					.vector3 => |vector3| try env.vector3_add(vector3),
-				};
-			},
-
-			.sub => {
-				const subtractable = try env.expect_object(env.pop());
-
-				defer env.release(subtractable);
-
-				_ = switch (try env.expect_numeric(subtractable)) {
-					.fixed => |fixed| try env.fixed_subtract(fixed),
-					.float => |float| try env.float_subtract(float),
-					.vector2 => |vector2| try env.vector2_subtract(vector2),
-					.vector3 => |vector3| try env.vector3_subtract(vector3),
-				};
-			},
-
-			.mul => {
-				const multiplicable = try env.expect_object(env.pop());
-
-				defer env.release(multiplicable);
-
-				_ = switch (try env.expect_numeric(multiplicable)) {
-					.fixed => |fixed| try env.fixed_multiply(fixed),
-					.float => |float| try env.float_multiply(float),
-					.vector2 => |vector2| try env.vector2_multiply(vector2),
-					.vector3 => |vector3| try env.vector3_multiply(vector3),
-				};
-			},
-
-			.div => {
-				const divisible = try env.expect_object(env.pop());
-
-				defer env.release(divisible);
-
-				_ = switch (try env.expect_numeric(divisible)) {
-					.fixed => |fixed| try env.fixed_divide(fixed),
-					.float => |float| try env.float_divide(float),
-					.vector2 => |vector2| try env.vector2_divide(vector2),
-					.vector3 => |vector3| try env.vector3_divide(vector3),
-				};
-			},
-
-			.eql => {
-				if (env.pop()) |equatable| {
-					defer env.release(equatable);
-
-					_ = try env.equals_object(equatable);
-				} else {
-					_ = try env.equals_nil();
-				}
-			},
-
-			.cgt => {
-				const comparable = try env.expect_object(env.pop());
-
-				defer env.release(comparable);
-
-				_ = try env.compare_greater(comparable);
-			},
-
-			.clt => {
-				const comparable = try env.expect_object(env.pop());
-
-				defer env.release(comparable);
-
-				_ = try env.compare_less(comparable);
-			},
-
-			.cge => {
-				const comparable = try env.expect_object(env.pop());
-
-				defer env.release(comparable);
-
-				_ = try env.compare_greater_equals(comparable);
-			},
-
-			.cle => {
-				const comparable = try env.expect_object(env.pop());
-
-				defer env.release(comparable);
-
-				_ = try env.compare_less_equals(comparable);
-			},
-
-			.jf => |jf| {
-				if (env.pop()) |condition| {
-					defer env.release(condition);
-
-					if (condition.is_false()) {
-						self.cursor = jf;
-					}
-				} else {
-					self.cursor = jf;
-				}
-			},
-
-			.jt => |jt| {
-				if (env.pop()) |condition| {
-					defer env.release(condition);
-
-					if (condition.is_true()) {
-						self.cursor = jt;
-					}
-				}
-			},
-		}
-	}
-
-	return env.pop();
-}
-
-fn get_binding(self: *Self, env: *script.Runtime, index: usize) script.Error!?*script.Object {
-	if (index >= self.bindings.len) {
-		return env.raise(error.IllegalState, "invalid binding", .{});
-	}
-
-	return self.bindings[index];
-}
-
-fn get_constant(self: *const Self, env: *script.Runtime, index: usize) script.Error!*script.Object {
-	if (index >= self.constants.values.len) {
-		return env.raise(error.IllegalState, "invalid constant", .{});
-	}
-
-	return self.constants.values[index];
-}
-
-pub fn init(env: *script.Runtime, name: []const u8, environment: *const tree.Environment, externals: []const External) script.Error!Self {
-	const name_symbol = (try env.new_symbol(name)).pop().?;
-
-	errdefer env.release(name_symbol);
-
-	const externals_table = (try env.new_table()).pop().?;
-
-	errdefer env.release(externals_table);
-
-	for (0 .. externals.len) |i| {
-		const external_name, const external_object = externals[i];
-
-		try (try env.new_symbol(external_name)).index_set(externals_table, external_object);
-	}
-
-	var chunk = Self{
-		.externals = externals_table,
-		.name = name_symbol,
-		.opcodes = .{.allocator = env.allocator},
-		.constants = .{.allocator = env.allocator},
-		.lines = .{.allocator = env.allocator},
-		.bindings = &.{},
-		.arity = environment.argument_count,
-		.cursor = 0,
-	};
-
-	var compiler = Compiler{
-		.chunk = &chunk,
-		.env = env,
-	};
-
-	try compiler.compile_environment(environment);
-
-	return chunk;
-}
-
-pub const typeinfo = script.Typeinfo{
-	.name = "lambda",
-	.destruct = typeinfo_destruct,
-	.call = typeinfo_call,
-	.to_string = typeinfo_to_string,
-};
-
-fn typeinfo_call(context: script.Typeinfo.CallContext) script.Error!?*script.Object {
-	return @as(*Self, @ptrCast(@alignCast(context.userdata))).execute(context.env);
-}
-
-fn typeinfo_destruct(context: script.Typeinfo.DestructContext) void {
-	@as(*Self, @ptrCast(@alignCast(context.userdata))).deinit(context.env);
-}
-
-fn typeinfo_to_string(context: script.Typeinfo.ToStringContext) script.Error!*script.Object {
-	return (try (try context.env.push(@as(*Self, @ptrCast(@alignCast(context.userdata))).name)).to_string()).pop().?;
-}
-
-pub fn write(self: *Self, line: tokens.Line, opcode: Opcode) std.mem.Allocator.Error!void {
-	try self.opcodes.push(opcode);
-	try self.lines.push(line);
-}

src/coral/script/Table.zig

@@ -1,135 +0,0 @@
-const coral = @import("coral");
-
-const script = @import("../script.zig");
-
-associative: coral.map.Table(*script.Object, *script.Object, struct {
-	pub const hash = script.Object.hash;
-
-	pub const equals = script.Object.equals;
-}),
-
-contiguous: coral.Stack(?*script.Object),
-
-const Self = @This();
-
-pub fn deinit(self: *Self, env: *script.Runtime) void {
-	{
-		var entries = self.associative.entries();
-
-		while (entries.next()) |entry| {
-			env.release(entry.key);
-			env.release(entry.value);
-		}
-	}
-
-	self.associative.deinit();
-
-	while (self.contiguous.pop()) |value| {
-		if (value.*) |ref| {
-			env.release(ref);
-		}
-	}
-
-	self.contiguous.deinit();
-}
-
-pub fn init(env: *script.Runtime) Self {
-	return .{
-		.associative = .{
-			.allocator = env.allocator,
-			.traits = .{},
-		},
-
-		.contiguous = .{.allocator = env.allocator},
-	};
-}
-
-pub const typeinfo = script.Typeinfo{
-	.name = "table",
-	.destruct = typeinfo_destruct,
-	.get = typeinfo_get,
-	.set = typeinfo_set,
-	.count = typeinfo_count,
-};
-
-fn typeinfo_count(context: script.Typeinfo.CountContext) script.Error!script.Fixed {
-	const table = @as(*Self, @ptrCast(@alignCast(context.userdata)));
-
-	return @intCast(table.associative.len + table.contiguous.values.len);
-}
-
-fn typeinfo_destruct(context: script.Typeinfo.DestructContext) void {
-	@as(*Self, @ptrCast(@alignCast(context.userdata))).deinit(context.env);
-}
-
-fn typeinfo_get(context: script.Typeinfo.GetContext) script.Error!?*script.Object {
-	const table = @as(*Self, @ptrCast(@alignCast(context.userdata)));
-	const index = (try context.push_index()).pop().?;
-
-	defer context.env.release(index);
-
-	if (index.is_fixed()) |fixed| {
-		if (fixed < 0) {
-			// TODO: Negative indexing.
-			unreachable;
-		}
-
-		if (fixed < table.contiguous.values.len) {
-			return table.contiguous.values[@intCast(fixed)];
-		}
-	}
-
-	if (table.associative.lookup(index)) |value| {
-		return value;
-	}
-
-	return null;
-}
-
-fn typeinfo_set(context: script.Typeinfo.SetContext) script.Error!void {
-	const table = @as(*Self, @ptrCast(@alignCast(context.userdata)));
-	const index = (try context.push_index()).pop().?;
-
-	errdefer context.env.release(index);
-
-	if (index.is_fixed()) |fixed| {
-		if (fixed < 0) {
-			// TODO: Negative indexing.
-			unreachable;
-		}
-
-		if (fixed < table.contiguous.values.len) {
-			const maybe_replacing = &table.contiguous.values[@intCast(fixed)];
-
-			if (maybe_replacing.*) |replacing| {
-				context.env.release(replacing);
-			}
-
-			if ((try context.push_value()).pop()) |value| {
-				errdefer context.env.release(value);
-
-				maybe_replacing.* = value;
-			} else {
-				maybe_replacing.* = null;
-			}
-
-			return;
-		}
-	}
-
-	const value = (try context.push_value()).pop() orelse {
-		if (table.associative.remove(index)) |removed| {
-			context.env.release(removed.key);
-			context.env.release(removed.value);
-		}
-
-		return;
-	};
-
-	errdefer context.env.release(value);
-
-	if (try table.associative.replace(index, value)) |replaced| {
-		context.env.release(replaced.key);
-		context.env.release(replaced.value);
-	}
-}

src/coral/script/tokens.zig

@@ -1,535 +0,0 @@
-const coral = @import("coral");
-
-const std = @import("std");
-
-pub const Line = struct {
-	number: u32,
-};
-
-pub const Token = union(enum) {
-	end,
-	unknown: u8,
-	newline,
-	identifier: []const u8,
-	builtin: []const u8,
-
-	symbol_plus,
-	symbol_minus,
-	symbol_asterisk,
-	symbol_forward_slash,
-	symbol_paren_left,
-	symbol_paren_right,
-	symbol_bang,
-	symbol_comma,
-	symbol_at,
-	symbol_brace_left,
-	symbol_brace_right,
-	symbol_bracket_left,
-	symbol_bracket_right,
-	symbol_period,
-	symbol_colon,
-	symbol_less_than,
-	symbol_less_equals,
-	symbol_greater_than,
-	symbol_greater_equals,
-	symbol_equals,
-	symbol_double_equals,
-
-	number: []const u8,
-	string: []const u8,
-	template_string: []const u8,
-
-	keyword_nil,
-	keyword_false,
-	keyword_true,
-	keyword_return,
-	keyword_self,
-	keyword_const,
-	keyword_if,
-	keyword_do,
-	keyword_end,
-	keyword_while,
-	keyword_else,
-	keyword_elif,
-	keyword_var,
-	keyword_vec2,
-	keyword_vec3,
-	keyword_let,
-	keyword_lambda,
-
-	pub fn text(self: Token) []const u8 {
-		return switch (self) {
-			.end => "end",
-			.unknown => |unknown| @as([*]const u8, @ptrCast(&unknown))[0 .. 1],
-			.newline => "newline",
-
-			.identifier => |identifier| identifier,
-			.builtin => |identifier| identifier,
-
-			.symbol_plus => "+",
-			.symbol_minus => "-",
-			.symbol_asterisk => "*",
-			.symbol_forward_slash => "/",
-			.symbol_paren_left => "(",
-			.symbol_paren_right => ")",
-			.symbol_bang => "!",
-			.symbol_comma => ",",
-			.symbol_at => "@",
-			.symbol_brace_left => "{",
-			.symbol_brace_right => "}",
-			.symbol_bracket_left => "[",
-			.symbol_bracket_right => "]",
-			.symbol_period => ".",
-			.symbol_colon => ":",
-			.symbol_less_than => "<",
-			.symbol_less_equals => "<=",
-			.symbol_greater_than => ">",
-			.symbol_greater_equals => ">=",
-			.symbol_equals => "=",
-			.symbol_double_equals => "==",
-
-			.number => |literal| literal,
-			.string => |literal| literal,
-			.template_string => |literal| literal,
-
-			.keyword_const => "const",
-			.keyword_nil => "nil",
-			.keyword_false => "false",
-			.keyword_true => "true",
-			.keyword_return => "return",
-			.keyword_self => "self",
-			.keyword_if => "if",
-			.keyword_do => "do",
-			.keyword_end => "end",
-			.keyword_while => "while",
-			.keyword_elif => "elif",
-			.keyword_else => "else",
-			.keyword_var => "var",
-			.keyword_vec2 => "vec2",
-			.keyword_vec3 => "vec3",
-			.keyword_let => "let",
-			.keyword_lambda => "lambda",
-		};
-	}
-};
-
-pub const Stream = struct {
-	source: []const u8,
-	line: Line = .{.number = 1},
-	token: Token = .newline,
-
-	pub fn skip_newlines(self: *Stream) void {
-		self.step();
-
-		while (self.token == .newline) {
-			self.step();
-		}
-	}
-
-	pub fn step(self: *Stream) void {
-		var cursor = @as(usize, 0);
-
-		defer self.source = self.source[cursor ..];
-
-		while (cursor < self.source.len) {
-			switch (self.source[cursor]) {
-				'#' => {
-					cursor += 1;
-
-					while (cursor < self.source.len and self.source[cursor] != '\n') {
-						cursor += 1;
-					}
-				},
-
-				' ', '\t' => cursor += 1,
-
-				'\n' => {
-					cursor += 1;
-					self.token = .newline;
-					self.line.number += 1;
-
-					return;
-				},
-
-				'0' ... '9' => {
-					const begin = cursor;
-
-					cursor += 1;
-
-					while (cursor < self.source.len) switch (self.source[cursor]) {
-						'0' ... '9' => cursor += 1,
-
-						'.' => {
-							cursor += 1;
-
-							while (cursor < self.source.len) switch (self.source[cursor]) {
-								'0' ... '9' => cursor += 1,
-								else => break,
-							};
-
-							self.token = .{.number = self.source[begin .. cursor]};
-
-							return;
-						},
-
-						else => break,
-					};
-
-					self.token = .{.number = self.source[begin .. cursor]};
-
-					return;
-				},
-
-				'A' ... 'Z', 'a' ... 'z', '_' => {
-					const begin = cursor;
-
-					cursor += 1;
-
-					while (cursor < self.source.len) switch (self.source[cursor]) {
-						'0'...'9', 'A'...'Z', 'a'...'z', '_' => cursor += 1,
-						else => break,
-					};
-
-					const identifier = self.source[begin .. cursor];
-
-					std.debug.assert(identifier.len != 0);
-
-					switch (identifier[0]) {
-						'c' => {
-							if (coral.are_equal(identifier[1 ..], "onst")) {
-								self.token = .keyword_const;
-
-								return;
-							}
-						},
-
-						'd' => {
-							if (coral.are_equal(identifier[1 ..], "o")) {
-								self.token = .keyword_do;
-
-								return;
-							}
-						},
-
-						'e' => {
-							if (coral.are_equal(identifier[1 ..], "lse")) {
-								self.token = .keyword_else;
-
-								return;
-							}
-
-							if (coral.are_equal(identifier[1 ..], "lif")) {
-								self.token = .keyword_elif;
-
-								return;
-							}
-
-							if (coral.are_equal(identifier[1 ..], "nd")) {
-								self.token = .keyword_end;
-
-								return;
-							}
-						},
-
-						'f' => {
-							if (coral.are_equal(identifier[1 ..], "alse")) {
-								self.token = .keyword_false;
-
-								return;
-							}
-						},
-
-						'i' => {
-							if (coral.are_equal(identifier[1 ..], "f")) {
-								self.token = .keyword_if;
-
-								return;
-							}
-						},
-
-						'l' => {
-							if (coral.are_equal(identifier[1 ..], "ambda")) {
-								self.token = .keyword_lambda;
-
-								return;
-							}
-
-							if (coral.are_equal(identifier[1 ..], "et")) {
-								self.token = .keyword_let;
-
-								return;
-							}
-						},
-
-						'n' => {
-							if (coral.are_equal(identifier[1 ..], "il")) {
-								self.token = .keyword_nil;
-
-								return;
-							}
-						},
-
-						'r' => {
-							if (coral.are_equal(identifier[1 ..], "eturn")) {
-								self.token = .keyword_return;
-
-								return;
-							}
-						},
-
-						's' => {
-							if (coral.are_equal(identifier[1 ..], "elf")) {
-								self.token = .keyword_self;
-
-								return;
-							}
-						},
-
-						't' => {
-							if (coral.are_equal(identifier[1 ..], "rue")) {
-								self.token = .keyword_true;
-
-								return;
-							}
-						},
-
-						'v' => {
-							const rest = identifier[1 ..];
-
-							if (coral.are_equal(rest, "ar")) {
-								self.token = .keyword_var;
-
-								return;
-							}
-
-							if (coral.are_equal(rest, "vec2")) {
-								self.token = .keyword_vec2;
-
-								return;
-							}
-
-							if (coral.are_equal(rest, "vec3")) {
-								self.token = .keyword_vec3;
-
-								return;
-							}
-						},
-
-						'w' => {
-							if (coral.are_equal(identifier[1 ..], "hile")) {
-								self.token = .keyword_while;
-
-								return;
-							}
-						},
-
-						else => {},
-					}
-
-					self.token = .{.identifier = identifier};
-
-					return;
-				},
-
-				'`' => {
-					cursor += 1;
-
-					const begin = cursor;
-
-					while (cursor < self.source.len) switch (self.source[cursor]) {
-						'`' => break,
-						else => cursor += 1,
-					};
-
-					self.token = .{.template_string = self.source[begin .. cursor]};
-					cursor += 1;
-
-					return;
-				},
-
-				'"' => {
-					cursor += 1;
-
-					const begin = cursor;
-
-					while (cursor < self.source.len) switch (self.source[cursor]) {
-						'"' => break,
-						else => cursor += 1,
-					};
-
-					self.token = .{.string = self.source[begin .. cursor]};
-					cursor += 1;
-
-					return;
-				},
-
-				'{' => {
-					self.token = .symbol_brace_left;
-					cursor += 1;
-
-					return;
-				},
-
-				'}' => {
-					self.token = .symbol_brace_right;
-					cursor += 1;
-
-					return;
-				},
-
-				'[' => {
-					self.token = .symbol_bracket_left;
-					cursor += 1;
-
-					return;
-				},
-
-				']' => {
-					self.token = .symbol_bracket_right;
-					cursor += 1;
-
-					return;
-				},
-
-				',' => {
-					self.token = .symbol_comma;
-					cursor += 1;
-
-					return;
-				},
-
-				'!' => {
-					self.token = .symbol_bang;
-					cursor += 1;
-
-					return;
-				},
-
-				')' => {
-					self.token = .symbol_paren_right;
-					cursor += 1;
-
-					return;
-				},
-
-				'(' => {
-					self.token = .symbol_paren_left;
-					cursor += 1;
-
-					return;
-				},
-
-				'/' => {
-					self.token = .symbol_forward_slash;
-					cursor += 1;
-
-					return;
-				},
-
-				'*' => {
-					self.token = .symbol_asterisk;
-					cursor += 1;
-
-					return;
-				},
-
-				'-' => {
-					self.token = .symbol_minus;
-					cursor += 1;
-
-					return;
-				},
-
-				'+' => {
-					self.token = .symbol_plus;
-					cursor += 1;
-
-					return;
-				},
-
-				':' => {
-					self.token = .symbol_colon;
-					cursor += 1;
-
-					return;
-				},
-
-				'=' => {
-					cursor += 1;
-
-					if (cursor < self.source.len) {
-						switch (self.source[cursor]) {
-							'=' => {
-								cursor += 1;
-								self.token = .symbol_double_equals;
-
-								return;
-							},
-
-							else => {},
-						}
-					}
-
-					self.token = .symbol_equals;
-
-					return;
-				},
-
-				'<' => {
-					cursor += 1;
-
-					if (cursor < self.source.len and (self.source[cursor] == '=')) {
-						cursor += 1;
-						self.token = .symbol_less_equals;
-
-						return;
-					}
-
-					self.token = .symbol_less_than;
-
-					return;
-				},
-
-				'>' => {
-					cursor += 1;
-
-					if (cursor < self.source.len and (self.source[cursor] == '=')) {
-						cursor += 1;
-						self.token = .symbol_greater_equals;
-
-						return;
-					}
-
-					self.token = .symbol_greater_than;
-
-					return;
-				},
-
-				'.' => {
-					self.token = .symbol_period;
-					cursor += 1;
-
-					return;
-				},
-
-				'@' => {
-					self.token = .symbol_at;
-					cursor += 1;
-
-					return;
-				},
-
-				else => {
-					self.token = .{.unknown = self.source[cursor]};
-					cursor += 1;
-
-					return;
-				},
-			}
-		}
-
-		self.token = .end;
-
-		return;
-	}
-};

src/coral/script/tree.zig

@@ -1,268 +0,0 @@
-pub const Expr = @import("./tree/Expr.zig");
-
-pub const Stmt = @import("./tree/Stmt.zig");
-
-const coral = @import("coral");
-
-const std = @import("std");
-
-const script = @import("../script.zig");
-
-const tokens = @import("./tokens.zig");
-
-pub const Declaration = struct {
-	identifier: []const coral.Byte,
-
-	is: packed struct {
-		readonly: bool = false,
-		captured: bool = false,
-	} = .{},
-};
-
-pub const Environment = struct {
-	captures: [capture_max]Capture = [_]Capture{.{.declaration_index = 0}} ** capture_max,
-	capture_count: u8 = 0,
-	declarations: [declaration_max]Declaration = [_]Declaration{.{.identifier = ""}} ** declaration_max,
-	declaration_count: u8 = 0,
-	argument_count: u8 = 0,
-	statement: ?*const Stmt = null,
-	enclosing: ?*Environment = null,
-
-	pub const Capture = union (enum) {
-		declaration_index: u8,
-		capture_index: u8,
-	};
-
-	pub const DeclareError = std.mem.Allocator.Error || error {
-		DeclarationExists,
-	};
-
-	const capture_max = std.math.maxInt(u8);
-
-	const declaration_max = std.math.maxInt(u8);
-
-	pub fn create_enclosed(self: *Environment, root: *Root) std.mem.Allocator.Error!*Environment {
-		const environment = try root.arena.allocator().create(Environment);
-
-		environment.* = .{.enclosing = self};
-
-		return environment;
-	}
-
-	fn declare(self: *Environment, declaration: Declaration) DeclareError!*const Declaration {
-		if (self.declaration_count == self.declarations.len) {
-			return error.OutOfMemory;
-		}
-
-		{
-			var environment = self;
-
-			while (true) {
-				var remaining_count = environment.declaration_count;
-
-				while (remaining_count != 0) {
-					remaining_count -= 1;
-
-					if (coral.are_equal(environment.declarations[remaining_count].identifier, declaration.identifier)) {
-						return error.DeclarationExists;
-					}
-				}
-
-				environment = environment.enclosing orelse break;
-			}
-		}
-
-		const declaration_slot = &self.declarations[self.declaration_count];
-
-		declaration_slot.* = declaration;
-		self.declaration_count += 1;
-
-		return declaration_slot;
-	}
-
-	pub fn declare_argument(self: *Environment, identifier: []const u8) DeclareError!*const Declaration {
-		std.debug.assert(self.declaration_count <= self.argument_count);
-
-		defer self.argument_count += 1;
-
-		return self.declare(.{
-			.identifier = identifier,
-			.is = .{.readonly = true},
-		});
-	}
-
-	pub fn declare_constant(self: *Environment, identifier: []const u8) DeclareError!*const Declaration {
-		return self.declare(.{
-			.identifier = identifier,
-			.is = .{.readonly = true},
-		});
-	}
-
-	pub fn declare_variable(self: *Environment, identifier: []const u8) DeclareError!*const Declaration {
-		return self.declare(.{.identifier = identifier});
-	}
-
-	pub fn resolve_declaration(self: *Environment, identifier: []const u8) std.mem.Allocator.Error!?*const Declaration {
-		var environment = self;
-		var ancestry = @as(u32, 0);
-
-		while (true) : (ancestry += 1) {
-			var remaining_count = environment.declaration_count;
-
-			while (remaining_count != 0) {
-				remaining_count -= 1;
-
-				const declaration = &environment.declarations[remaining_count];
-
-				if (coral.are_equal(declaration.identifier, identifier)) {
-					if (ancestry != 0) {
-						declaration.is.captured = true;
-						environment = self;
-						ancestry -= 1;
-
-						while (ancestry != 0) : (ancestry -= 1) {
-							if (environment.capture_count == environment.captures.len) {
-								return error.OutOfMemory;
-							}
-
-							environment.captures[environment.capture_count] = .{
-								.capture_index = environment.enclosing.?.capture_count
-							};
-
-							environment.capture_count += 1;
-							environment = environment.enclosing.?;
-						}
-
-						environment.captures[environment.capture_count] = .{.declaration_index = remaining_count};
-						environment.capture_count += 1;
-					}
-
-					return declaration;
-				}
-			}
-
-			environment = environment.enclosing orelse return null;
-		}
-	}
-
-	pub fn get_captures(self: *const Environment) []const Capture {
-		return self.captures[0 .. self.capture_count];
-	}
-
-	pub fn get_declarations(self: *const Environment) []const Declaration {
-		return self.declarations[0 .. self.declaration_count];
-	}
-};
-
-pub fn NodeChain(comptime Value: type) type {
-	return struct {
-		head: ?*Value = null,
-		tail: ?*Value = null,
-
-		pub const Nodes = struct {
-			current: ?*const Value,
-
-			pub fn next(self: *Nodes) ?*const Value {
-				const current = self.current orelse return null;
-
-				defer self.current = current.next;
-
-				return current;
-			}
-		};
-
-		const Self = @This();
-
-		pub fn append(self: *Self, value: *Value) void {
-			if (self.tail) |node| {
-				node.next = value;
-				self.tail = value;
-			} else {
-				self.tail = value;
-				self.head = value;
-			}
-		}
-
-		pub fn nodes(self: *const Self) Nodes {
-			return .{.current = self.head};
-		}
-	};
-}
-
-pub const ParseError = std.mem.Allocator.Error || error {
-	BadSyntax,
-};
-
-pub const Root = struct {
-	arena: std.heap.ArenaAllocator,
-	environment: Environment,
-	error_messages: MessageList,
-
-	const MessageList = coral.Stack([]coral.Byte);
-
-	pub fn report_error(self: *Root, line: tokens.Line, comptime format: []const u8, args: anytype) ParseError {
-		const allocator = self.arena.allocator();
-		const message = try coral.utf8.alloc_formatted(allocator, format, args);
-
-		defer allocator.free(message);
-
-		try self.error_messages.push(try coral.utf8.alloc_formatted(allocator, "{line_number}: {message}", .{
-			.message = message,
-			.line_number = line.number,
-		}));
-
-		return error.BadSyntax;
-	}
-
-	pub fn report_declare_error(self: *Root, line: tokens.Line, identifier: []const u8, @"error": Environment.DeclareError) ParseError {
-		return switch (@"error") {
-			error.OutOfMemory => error.OutOfMemory,
-
-			error.DeclarationExists => self.report_error(line, "declaration `{identifier}` already exists", .{
-				.identifier = identifier,
-			}),
-		};
-	}
-
-	pub fn create_node(self: *Root, node: anytype) std.mem.Allocator.Error!*@TypeOf(node) {
-		const copy = try self.arena.allocator().create(@TypeOf(node));
-
-		copy.* = node;
-
-		return copy;
-	}
-
-	pub fn create_string(self: *Root, comptime format: []const u8, args: anytype) std.mem.Allocator.Error![]const u8 {
-		return coral.utf8.alloc_formatted(self.arena.allocator(), format, args);
-	}
-
-	pub fn deinit(self: *Root) void {
-		self.error_messages.deinit();
-		self.arena.deinit();
-	}
-
-	pub fn init(allocator: std.mem.Allocator) std.mem.Allocator.Error!Root {
-		return .{
-			.arena = std.heap.ArenaAllocator.init(allocator),
-			.error_messages = .{.allocator = allocator},
-			.environment = .{},
-		};
-	}
-
-	pub fn parse(self: *Root, stream: *tokens.Stream) ParseError!void {
-		stream.skip_newlines();
-
-		const first_statement = try Stmt.parse(self, stream, &self.environment);
-		var current_statement = first_statement;
-
-		while (stream.token != .end) {
-			const next_statement = try Stmt.parse(self, stream, &self.environment);
-
-			current_statement.next = next_statement;
-			current_statement = next_statement;
-		}
-
-		self.environment.statement = first_statement;
-	}
-};
-

src/coral/script/tree/Expr.zig

@@ -1,906 +0,0 @@
-const Stmt = @import("./Stmt.zig");
-
-const coral = @import("coral");
-
-const tokens = @import("../tokens.zig");
-
-const tree = @import("../tree.zig");
-
-const std = @import("std");
-
-next: ?*const Self = null,
-line: tokens.Line,
-kind: Kind,
-
-pub const BinaryOp = struct {
-	rhs_operand: *Self,
-	lhs_operand: *Self,
-	operation: Operation,
-
-	pub const Operation = enum {
-		addition,
-		subtraction,
-		multiplication,
-		divsion,
-		equals_comparison,
-		greater_than_comparison,
-		greater_equals_comparison,
-		less_than_comparison,
-		less_equals_comparison,
-	};
-
-	fn parser(comptime parse_next: Parser, comptime operations: []const BinaryOp.Operation) Parser {
-		const BinaryOpParser = struct {
-			fn parse(root: *tree.Root, stream: *tokens.Stream, environment: *tree.Environment) tree.ParseError!*Self {
-				var expression = try parse_next(root, stream, environment);
-
-				inline for (operations) |operation| {
-					const token = comptime @as(tokens.Token, switch (operation) {
-						.addition => .symbol_plus,
-						.subtraction => .symbol_minus,
-						.multiplication => .symbol_asterisk,
-						.divsion => .symbol_forward_slash,
-						.equals_comparison => .symbol_double_equals,
-						.greater_than_comparison => .symbol_greater_than,
-						.greater_equals_comparison => .symbol_greater_equals,
-						.less_than_comparison => .symbol_less_than,
-						.less_equals_comparison => .symbol_less_equals,
-					});
-
-					if (stream.token == std.meta.activeTag(token)) {
-						stream.step();
-
-						if (stream.token == .end) {
-							return root.report_error(stream.line, "expected other half of expression after `" ++ comptime token.text() ++ "`", .{});
-						}
-
-						// TODO: Remove once Zig has fixed struct self-reassignment.
-						const unnecessary_temp = expression;
-
-						expression = try root.create_node(Self{
-							.line = stream.line,
-
-							.kind = .{
-								.binary_op = .{
-									.rhs_operand = try parse_next(root, stream, environment),
-									.operation = operation,
-									.lhs_operand = unnecessary_temp,
-								},
-							},
-						});
-					}
-				}
-
-				return expression;
-			}
-		};
-
-		return BinaryOpParser.parse;
-	}
-};
-
-pub const DeclarationGet = struct {
-	declaration: *const tree.Declaration,
-};
-
-pub const DeclarationSet = struct {
-	declaration: *const tree.Declaration,
-	assign: *const Self,
-};
-
-pub const FieldGet = struct {
-	identifier: []const coral.Byte,
-	object: *const Self,
-};
-
-pub const FieldSet = struct {
-	identifier: []const coral.Byte,
-	object: *const Self,
-	assign: *const Self,
-};
-
-pub const Invoke = struct {
-	argument: ?*const Self,
-	object: *const Self,
-};
-
-const Kind = union (enum) {
-	nil_literal,
-	true_literal,
-	false_literal,
-	number_literal: []const u8,
-	string_literal: []const u8,
-	string_template,
-	symbol_literal: []const u8,
-	vector2: Vector2,
-	vector3: Vector3,
-	table: tree.NodeChain(TableEntry),
-	group: *Self,
-	lambda_construct: LambdaConstruct,
-	declaration_get: DeclarationGet,
-	declaration_set: DeclarationSet,
-	field_get: FieldGet,
-	field_set: FieldSet,
-	external_get: ExternalGet,
-	subscript_get: SubscriptGet,
-	subscript_set: SubscriptSet,
-	binary_op: BinaryOp,
-	unary_op: UnaryOp,
-	invoke: Invoke,
-};
-
-pub const LambdaConstruct = struct {
-	environment: *const tree.Environment,
-};
-
-const Parser = fn (root: *tree.Root, stream: *tokens.Stream, environment: *tree.Environment) tree.ParseError!*Self;
-
-const ExternalGet = struct {
-	name: []const u8,
-};
-
-const Self = @This();
-
-pub const SubscriptGet = struct {
-	index: *const Self,
-	object: *const Self,
-};
-
-pub const SubscriptSet = struct {
-	index: *const Self,
-	object: *const Self,
-	assign: *const Self,
-};
-
-pub const TableEntry = struct {
-	next: ?*const TableEntry = null,
-	key: *const Self,
-	value: *const Self,
-};
-
-const TemplateToken = union (enum) {
-	invalid: []const coral.Byte,
-	literal: []const coral.Byte,
-	expression: []const coral.Byte,
-
-	fn extract(source: *[]const coral.Byte) ?TemplateToken {
-		var cursor = @as(usize, 0);
-
-		defer source.* = source.*[cursor ..];
-
-		while (cursor < source.len) {
-			switch (source.*[cursor]) {
-				'{' => {
-					cursor += 1;
-
-					while (true) : (cursor += 1) {
-						if (cursor == source.len) {
-							return .{.invalid = source.*[0 .. cursor]};
-						}
-
-						if (source.*[cursor] == '}') {
-							const token = TemplateToken{.expression = source.*[1 .. cursor]};
-
-							cursor += 1;
-
-							return token;
-						}
-					}
-				},
-
-				else => {
-					cursor += 1;
-
-					while (true) : (cursor += 1) {
-						if (cursor == source.len) {
-							return .{.literal = source.*[0 .. cursor]};
-						}
-
-						if (source.*[cursor] == '{') {
-							const cursor_next = cursor + 1;
-
-							if (cursor_next == source.len) {
-								return .{.invalid = source.*[0 .. cursor]};
-							}
-
-							if (source.*[cursor_next] == '{') {
-								cursor = cursor_next;
-
-								return .{.literal = source.*[0 .. cursor]};
-							}
-
-							return .{.literal = source.*[0 .. cursor]};
-						}
-					}
-				}
-			}
-		}
-
-		return null;
-	}
-};
-
-pub const UnaryOp = struct {
-	operand: *Self,
-	operation: Operation,
-
-	pub const Operation = enum {
-		numeric_negation,
-		boolean_negation,
-	};
-};
-
-pub const Vector2 = struct {
-	x: *const Self,
-	y: *const Self,
-};
-
-pub const Vector3 = struct {
-	x: *const Self,
-	y: *const Self,
-	z: *const Self,
-};
-
-pub fn parse(root: *tree.Root, stream: *tokens.Stream, environment: *tree.Environment) tree.ParseError!*Self {
-	const expression = try parse_additive(root, stream, environment);
-
-	if (stream.token == .symbol_equals) {
-		stream.skip_newlines();
-
-		if (stream.token == .end) {
-			return root.report_error(stream.line, "expected assignment after `=`", .{});
-		}
-
-		return root.create_node(Self{
-			.line = stream.line,
-
-			.kind = switch (expression.kind) {
-				.declaration_get => |declaration_get| convert: {
-					if (declaration_get.declaration.is.readonly) {
-						return root.report_error(stream.line, "readonly declarations cannot be re-assigned", .{});
-					}
-
-					break: convert .{
-						.declaration_set = .{
-							.assign = try parse(root, stream, environment),
-							.declaration = declaration_get.declaration,
-						},
-					};
-				},
-
-				.field_get => |field_get| .{
-					.field_set = .{
-						.assign = try parse(root, stream, environment),
-						.object = field_get.object,
-						.identifier = field_get.identifier,
-					},
-				},
-
-				.subscript_get => |subscript_get| .{
-					.subscript_set = .{
-						.assign = try parse(root, stream, environment),
-						.object = subscript_get.object,
-						.index = subscript_get.index,
-					},
-				},
-
-				else => return root.report_error(stream.line, "expected local or field on left-hand side of expression", .{}),
-			},
-		});
-	}
-
-	return expression;
-}
-
-const parse_additive = BinaryOp.parser(parse_equality, &.{
-	.addition,
-	.subtraction,
-});
-
-const parse_comparison = BinaryOp.parser(parse_term, &.{
-	.greater_than_comparison,
-	.greater_equals_comparison,
-	.less_than_comparison,
-	.less_equals_comparison
-});
-
-const parse_equality = BinaryOp.parser(parse_comparison, &.{
-	.equals_comparison,
-});
-
-fn parse_factor(root: *tree.Root, stream: *tokens.Stream, environment: *tree.Environment) tree.ParseError!*Self {
-	var expression = try parse_operand(root, stream, environment);
-
-	while (true) {
-		switch (stream.token) {
-			.symbol_period => {
-				stream.skip_newlines();
-
-				// TODO: Remove when Zig fixes miscompilation with in-place struct re-assignment.
-				const unnecessary_temp = expression;
-
-				expression = try root.create_node(Self{
-					.line = stream.line,
-
-					.kind = .{
-						.field_get = .{
-							.identifier = switch (stream.token) {
-								.identifier => |field_identifier| field_identifier,
-								else => return root.report_error(stream.line, "expected identifier after `.`", .{}),
-							},
-
-							.object = unnecessary_temp,
-						},
-					},
-				});
-
-				stream.skip_newlines();
-			},
-
-			.symbol_bracket_left => {
-				stream.skip_newlines();
-
-				// TODO: Remove when Zig fixes miscompilation with in-place struct re-assignment.
-				const unnecessary_temp = expression;
-
-				expression = try root.create_node(Self{
-					.line = stream.line,
-
-					.kind = .{
-						.subscript_get = .{
-							.index = try parse(root, stream, environment),
-							.object = unnecessary_temp,
-						},
-					},
-				});
-
-				if (stream.token != .symbol_bracket_right) {
-					return root.report_error(stream.line, "expected closing `]` on subscript", .{});
-				}
-
-				stream.skip_newlines();
-			},
-
-			.symbol_paren_left => {
-				const lines_stepped = stream.line;
-
-				stream.skip_newlines();
-
-				var first_argument = @as(?*Self, null);
-
-				if (stream.token != .symbol_paren_right) {
-					var argument = try parse(root, stream, environment);
-
-					first_argument = argument;
-
-					while (true) {
-						switch (stream.token) {
-							.symbol_comma => stream.skip_newlines(),
-							.symbol_paren_right => break,
-							else => return root.report_error(stream.line, "expected `,` or `)` after lambda argument", .{}),
-						}
-
-						const next_argument = try parse(root, stream, environment);
-
-						argument.next = next_argument;
-						argument = next_argument;
-					}
-				}
-
-				stream.skip_newlines();
-
-				// TODO: Remove when Zig fixes miscompilation with in-place struct re-assignment.
-				const unnecessary_temp = expression;
-
-				expression = try root.create_node(Self{
-					.line = lines_stepped,
-
-					.kind = .{
-						.invoke = .{
-							.argument = first_argument,
-							.object = unnecessary_temp,
-						},
-					},
-				});
-			},
-
-			else => break,
-		}
-	}
-
-	return expression;
-}
-
-fn parse_operand(root: *tree.Root, stream: *tokens.Stream, environment: *tree.Environment) tree.ParseError!*Self {
-	switch (stream.token) {
-		.symbol_paren_left => {
-			stream.skip_newlines();
-
-			const expression = try parse(root, stream, environment);
-
-			if (stream.token != .symbol_paren_right) {
-				return root.report_error(stream.line, "expected a closing `)` after expression", .{});
-			}
-
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .{.group = expression},
-			});
-		},
-
-		.keyword_nil => {
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .nil_literal,
-			});
-		},
-
-		.keyword_true => {
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .true_literal,
-			});
-		},
-
-		.keyword_false => {
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .false_literal,
-			});
-		},
-
-		.keyword_vec2 => {
-			stream.skip_newlines();
-
-			if (stream.token != .symbol_paren_left) {
-				return root.report_error(stream.line, "expected an opening `(` after `vec2`", .{});
-			}
-
-			stream.skip_newlines();
-
-			const x_expression = try parse(root, stream, environment);
-
-			switch (stream.token) {
-				.symbol_paren_right => {
-					stream.skip_newlines();
-
-					return root.create_node(Self{
-						.line = stream.line,
-
-						.kind = .{
-							.vector2 = .{
-								.x = x_expression,
-								.y = x_expression,
-							},
-						},
-					});
-				},
-
-				.symbol_comma => {
-					stream.skip_newlines();
-
-					const y_expression = try parse(root, stream, environment);
-
-					stream.skip_newlines();
-
-					if (stream.token != .symbol_paren_right) {
-						return root.report_error(stream.line, "expected a closing `)` after `vec3`", .{});
-					}
-
-					return root.create_node(Self{
-						.line = stream.line,
-
-						.kind = .{
-							.vector2 = .{
-								.x = x_expression,
-								.y = y_expression,
-							},
-						},
-					});
-				},
-
-				else => return root.report_error(stream.line, "expected a closing `)` after `vec3`", .{}),
-			}
-		},
-
-		.keyword_vec3 => {
-			stream.skip_newlines();
-
-			if (stream.token != .symbol_paren_left) {
-				return root.report_error(stream.line, "expected an opening `(` after `vec2`", .{});
-			}
-
-			stream.skip_newlines();
-
-			const x_expression = try parse(root, stream, environment);
-
-			switch (stream.token) {
-				.symbol_paren_right => {
-					stream.skip_newlines();
-
-					return root.create_node(Self{
-						.line = stream.line,
-
-						.kind = .{
-							.vector3 = .{
-								.x = x_expression,
-								.y = x_expression,
-								.z = x_expression,
-							},
-						},
-					});
-				},
-
-				.symbol_comma => {
-					stream.skip_newlines();
-
-					const y_expression = try parse(root, stream, environment);
-
-					stream.skip_newlines();
-
-					const z_expression = try parse(root, stream, environment);
-
-					stream.skip_newlines();
-
-					if (stream.token != .symbol_paren_right) {
-						return root.report_error(stream.line, "expected a closing `)` after `vec3`", .{});
-					}
-
-					return root.create_node(Self{
-						.line = stream.line,
-
-						.kind = .{
-							.vector3 = .{
-								.x = x_expression,
-								.y = y_expression,
-								.z = z_expression,
-							},
-						},
-					});
-				},
-
-				else => return root.report_error(stream.line, "expected a closing `)` after `vec3`", .{}),
-			}
-		},
-
-		.number => |value| {
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .{.number_literal = value},
-			});
-		},
-
-		.string => |value| {
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .{.string_literal = value},
-			});
-		},
-
-		.template_string => |value| {
-			const line = stream.line;
-
-			stream.skip_newlines();
-
-			return parse_template(root, value, line, environment);
-		},
-
-		.symbol_at => {
-			stream.step();
-
-			const identifier = switch (stream.token) {
-				.identifier => |identifier| identifier,
-				else => return root.report_error(stream.line, "expected identifier after `@`", .{}),
-			};
-
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .{.external_get = .{.name = identifier}},
-			});
-		},
-
-		.symbol_period => {
-			stream.step();
-
-			const identifier = switch (stream.token) {
-				.identifier => |identifier| identifier,
-				else => return root.report_error(stream.line, "expected identifier after `.`", .{}),
-			};
-
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .{.symbol_literal = identifier},
-			});
-		},
-
-		.identifier => |identifier| {
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-
-				.kind = .{
-					.declaration_get = .{
-						.declaration = (try environment.resolve_declaration(identifier)) orelse {
-							return root.report_error(stream.line, "undefined identifier `{identifier}`", .{
-								.identifier = identifier,
-							});
-						}
-					},
-				},
-			});
-		},
-
-		.keyword_lambda => {
-			stream.skip_newlines();
-
-			if (stream.token != .symbol_paren_left) {
-				return root.report_error(stream.line, "expected `(` after opening lambda block", .{});
-			}
-
-			stream.skip_newlines();
-
-			var lambda_environment = try environment.create_enclosed(root);
-
-			while (stream.token != .symbol_paren_right) {
-				const identifier = switch (stream.token) {
-					.identifier => |identifier| identifier,
-					else => return root.report_error(stream.line, "expected identifier", .{}),
-				};
-
-				_ = lambda_environment.declare_argument(identifier) catch |declare_error| {
-					return root.report_declare_error(stream.line, identifier, declare_error);
-				};
-
-				stream.skip_newlines();
-
-				switch (stream.token) {
-					.symbol_comma => stream.skip_newlines(),
-					.symbol_paren_right => break,
-					else => return root.report_error(stream.line, "expected `,` or `)` after identifier", .{}),
-				}
-			}
-
-			stream.skip_newlines();
-
-			if (stream.token != .symbol_colon) {
-				return root.report_error(stream.line, "expected `:` after closing `)` of lambda identifiers", .{});
-			}
-
-			stream.skip_newlines();
-
-			if (stream.token != .keyword_end) {
-				const first_statement = try Stmt.parse(root, stream, lambda_environment);
-				var current_statement = first_statement;
-
-				while (stream.token != .keyword_end) {
-					const next_statement = try Stmt.parse(root, stream, lambda_environment);
-
-					current_statement.next = next_statement;
-					current_statement = next_statement;
-				}
-
-				lambda_environment.statement = first_statement;
-			}
-
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .{.lambda_construct = .{.environment = lambda_environment}},
-			});
-		},
-
-		.symbol_brace_left => {
-			stream.skip_newlines();
-
-			return parse_table(root, stream, environment);
-		},
-
-		.symbol_minus => {
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-
-				.kind = .{
-					.unary_op = .{
-						.operand = try parse_factor(root, stream, environment),
-						.operation = .numeric_negation,
-					},
-				},
-			});
-		},
-
-		.symbol_bang => {
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-
-				.kind = .{
-					.unary_op = .{
-						.operand = try parse_factor(root, stream, environment),
-						.operation = .boolean_negation,
-					},
-				},
-			});
-		},
-
-		else => return root.report_error(stream.line, "unexpected token in expression", .{}),
-	}
-}
-
-fn parse_table(root: *tree.Root, stream: *tokens.Stream, environment: *tree.Environment) tree.ParseError!*Self {
-	var entries = tree.NodeChain(TableEntry){};
-	var sequential_index = @as(usize, 0);
-
-	while (true) {
-		switch (stream.token) {
-			.symbol_brace_right => {
-				stream.skip_newlines();
-
-				return root.create_node(Self{
-					.line = stream.line,
-					.kind = .{.table = entries},
-				});
-			},
-
-			.symbol_bracket_left => {
-				stream.skip_newlines();
-
-				const key = try parse(root, stream, environment);
-
-				if (stream.token != .symbol_bracket_right)  {
-					return root.report_error(stream.line, "expected `]` after subscript index expression", .{});
-				}
-
-				stream.skip_newlines();
-
-				if (stream.token != .symbol_equals) {
-					return root.report_error(stream.line, "expected `=` after table expression key", .{});
-				}
-
-				stream.skip_newlines();
-
-				entries.append(try root.create_node(TableEntry{
-					.value = try parse(root, stream, environment),
-					.key = key,
-				}));
-			},
-
-			.symbol_period => {
-				stream.step();
-
-				const field = switch (stream.token) {
-					.identifier => |identifier| identifier,
-					else => return root.report_error(stream.line, "invalid symbol literal", .{}),
-				};
-
-				stream.skip_newlines();
-
-				switch (stream.token) {
-					.symbol_comma => {
-						stream.skip_newlines();
-
-						entries.append(try root.create_node(TableEntry{
-							.key = try root.create_node(Self{
-								.line = stream.line,
-								.kind = .{.number_literal = try root.create_string("{i}", .{.i = sequential_index})},
-							}),
-
-							.value = try root.create_node(Self{
-								.line = stream.line,
-								.kind = .{.symbol_literal = field},
-							}),
-						}));
-
-						sequential_index += 1;
-					},
-
-					.symbol_equals => {
-						stream.skip_newlines();
-
-						entries.append(try root.create_node(TableEntry{
-							.value = try parse(root, stream, environment),
-
-							.key = try root.create_node(Self{
-								.line = stream.line,
-								.kind = .{.symbol_literal = field},
-							}),
-						}));
-					},
-
-					else => return root.report_error(stream.line, "expected `,` or `=` after symbol", .{}),
-				}
-			},
-
-			else => {
-				entries.append(try root.create_node(TableEntry{
-					.value = try parse(root, stream, environment),
-
-					.key = try root.create_node(Self{
-						.line = stream.line,
-						.kind = .{.number_literal = try root.create_string("{i}", .{.i = sequential_index})},
-					}),
-				}));
-
-				sequential_index += 1;
-			},
-		}
-
-		switch (stream.token) {
-			.symbol_brace_right => {
-				stream.skip_newlines();
-
-				return root.create_node(Self{
-					.line = stream.line,
-					.kind = .{.table = entries},
-				});
-			},
-
-			.symbol_comma => stream.skip_newlines(),
-			else => return root.report_error(stream.line, "expected `,` or '}' after table key value pair", .{}),
-		}
-	}
-}
-
-fn parse_template(root: *tree.Root, template: []const coral.Byte, line: tokens.Line, environment: *tree.Environment) tree.ParseError!*Self {
-	const expression_head = try root.create_node(Self{
-		.line = line,
-		.kind = .string_template,
-	});
-
-	var expression_tail = expression_head;
-	var source = template;
-
-	while (TemplateToken.extract(&source)) |token| {
-		const expression = try switch (token) {
-			.invalid => |invalid| root.report_error(line, "invalid template format: `{invalid}`", .{
-				.invalid = invalid,
-			}),
-
-			.literal => |literal| root.create_node(Self{
-				.line = line,
-				.kind = .{.string_literal = literal},
-			}),
-
-			.expression => |expression| create: {
-				var stream = tokens.Stream{
-					.source = expression,
-					.line = line,
-				};
-
-				stream.step();
-
-				break: create try parse(root, &stream, environment);
-			},
-		};
-
-		expression_tail.next = expression;
-		expression_tail = expression;
-	}
-
-	return expression_head;
-}
-
-const parse_term = BinaryOp.parser(parse_factor, &.{
-	.multiplication,
-	.divsion,
-});

src/coral/script/tree/Stmt.zig

@@ -1,242 +0,0 @@
-const Expr = @import("./Expr.zig");
-
-const coral = @import("coral");
-
-const tokens = @import("../tokens.zig");
-
-const tree = @import("../tree.zig");
-
-next: ?*const Self = null,
-line: tokens.Line,
-
-kind: union (enum) {
-	top_expression: *const Expr,
-	@"return": Return,
-	declare: Declare,
-	@"if": If,
-	@"while": While,
-},
-
-pub const Declare = struct {
-	declaration: *const tree.Declaration,
-	initial_expression: *const Expr,
-};
-
-pub const If = struct {
-	then_expression: *const Expr,
-	@"then": *const Self,
-	@"else": ?*const Self,
-};
-
-pub const Return = struct {
-	returned_expression: ?*const Expr,
-};
-
-const Self = @This();
-
-pub const While = struct {
-	loop_expression: *const Expr,
-	loop: *const Self,
-};
-
-pub fn parse(root: *tree.Root, stream: *tokens.Stream, environment: *tree.Environment) tree.ParseError!*Self {
-	switch (stream.token) {
-		.keyword_return => {
-			stream.step();
-
-			if (stream.token != .end and stream.token != .newline) {
-				return root.create_node(Self{
-					.line = stream.line,
-					.kind = .{.@"return" = .{.returned_expression = try Expr.parse(root, stream, environment)}},
-				});
-			}
-
-			if (stream.token != .end and stream.token != .newline) {
-				return root.report_error(stream.line, "expected end or newline after return statement", .{});
-			}
-
-			return root.create_node(Self{
-				.line = stream.line,
-				.kind = .{.@"return" = .{.returned_expression = null}},
-			});
-		},
-
-		.keyword_while => {
-			defer stream.skip_newlines();
-
-			stream.step();
-
-			const condition_expression = try Expr.parse(root, stream, environment);
-
-			if (stream.token != .symbol_colon) {
-				return root.report_error(stream.line, "expected `:` after `while` statement", .{});
-			}
-
-			stream.skip_newlines();
-
-			const first_statement = try parse(root, stream, environment);
-
-			{
-				var current_statement = first_statement;
-
-				while (stream.token != .keyword_end) {
-					const next_statement = try parse(root, stream, environment);
-
-					current_statement.next = next_statement;
-					current_statement = next_statement;
-				}
-			}
-
-			return root.create_node(Self{
-				.line = stream.line,
-
-				.kind = .{
-					.@"while" = .{
-						.loop = first_statement,
-						.loop_expression = condition_expression,
-					},
-				},
-			});
-		},
-
-		.keyword_var, .keyword_let => {
-			const is_constant = stream.token == .keyword_let;
-
-			stream.skip_newlines();
-
-			const identifier = switch (stream.token) {
-				.identifier => |identifier| identifier,
-				else => return root.report_error(stream.line, "expected identifier after declaration", .{}),
-			};
-
-			stream.skip_newlines();
-
-			if (stream.token != .symbol_equals) {
-				return root.report_error(stream.line, "expected `=` after declaration `{identifier}`", .{
-					.identifier = identifier,
-				});
-			}
-
-			stream.skip_newlines();
-
-			return root.create_node(Self{
-				.line = stream.line,
-
-				.kind = .{
-					.declare = .{
-						.initial_expression = try Expr.parse(root, stream, environment),
-
-						.declaration = declare: {
-							if (is_constant) {
-								break: declare environment.declare_constant(identifier) catch |declaration_error| {
-									return root.report_declare_error(stream.line, identifier, declaration_error);
-								};
-							}
-
-							break: declare environment.declare_variable(identifier) catch |declaration_error| {
-								return root.report_declare_error(stream.line, identifier, declaration_error);
-							};
-						},
-					},
-				},
-			});
-		},
-
-		.keyword_if => return parse_branch(root, stream, environment),
-
-		else => return root.create_node(Self{
-			.line = stream.line,
-			.kind = .{.top_expression = try Expr.parse(root, stream, environment)},
-		}),
-	}
-}
-
-fn parse_branch(root: *tree.Root, stream: *tokens.Stream, environment: *tree.Environment) tree.ParseError!*Self {
-	stream.step();
-
-	const expression = try Expr.parse(root, stream, environment);
-
-	if (stream.token != .symbol_colon) {
-		return root.report_error(stream.line, "expected `:` after `{token}`", .{.token = stream.token.text()});
-	}
-
-	stream.skip_newlines();
-
-	const first_then_statement = try parse(root, stream, environment);
-	var current_then_statement = first_then_statement;
-
-	while (true) {
-		switch (stream.token) {
-			.keyword_end => {
-				stream.skip_newlines();
-
-				return root.create_node(Self{
-					.line = stream.line,
-
-					.kind = .{
-						.@"if" = .{
-							.then_expression = expression,
-							.@"then" = first_then_statement,
-							.@"else" = null,
-						},
-					},
-				});
-			},
-
-			.keyword_else => {
-				stream.step();
-
-				if (stream.token != .symbol_colon) {
-					return root.report_error(stream.line, "expected `:` after `if` statement condition", .{});
-				}
-
-				stream.skip_newlines();
-
-				const first_else_statement = try parse(root, stream, environment);
-				var current_else_statement = first_else_statement;
-
-				while (stream.token != .keyword_end) {
-					const next_statement = try parse(root, stream, environment);
-
-					current_else_statement.next = next_statement;
-					current_else_statement = next_statement;
-				}
-
-				stream.skip_newlines();
-
-				return root.create_node(Self{
-					.line = stream.line,
-
-					.kind = .{
-						.@"if" = .{
-							.@"else" = first_else_statement,
-							.@"then" = first_then_statement,
-							.then_expression = expression,
-						},
-					}
-				});
-			},
-
-			.keyword_elif => {
-				return root.create_node(Self{
-					.line = stream.line,
-
-					.kind = .{
-						.@"if" = .{
-							.@"else" = try parse_branch(root, stream, environment),
-							.@"then" = first_then_statement,
-							.then_expression = expression,
-						},
-					},
-				});
-			},
-
-			else => {
-				const next_statement = try parse(root, stream, environment);
-
-				current_then_statement.next = next_statement;
-				current_then_statement = next_statement;
-			},
-		}
-	}
-}

src/coral/slots.zig

@@ -1,23 +0,0 @@
-const slices = @import("./slices.zig");
-
-const std = @import("std");
-
-pub fn Parallel(comptime Value: type) type {
-	const Slices = slices.Parallel(Value);
-	const alignment = @alignOf(Value);
-
-	return struct {
-		allocator: std.mem.Allocator,
-		slices: slices.Parallel(Value) = .{},
-
-		const Self = @This();
-
-		pub fn len(self: Self) usize {
-			return self.slices.len;
-		}
-
-		pub fn values(self: *Self, comptime field: Slices.Field) []align (alignment) Slices.Element(field) {
-			return self.slices.slice(field);
-		}
-	};
-}

src/flow/World.zig

@@ -1,30 +1,21 @@
 const builtin = @import("builtin");
 
-const heap = @import("./heap.zig");
+const coral = @import("coral");
 
-const map = @import("./map.zig");
+const states = @import("./states.zig");
-
-const resource = @import("./resource.zig");
 
 const std = @import("std");
 
-const stack = @import("./stack.zig");
-
 const system = @import("./system.zig");
 
 thread_pool: ?*std.Thread.Pool = null,
-thread_restricted_resources: [std.enums.values(ThreadRestriction).len]resource.Table,
+thread_restricted_resources: [std.enums.values(states.ThreadRestriction).len]states.Table,
-event_systems: stack.Sequential(system.Schedule),
+event_systems: coral.stack.Sequential(system.Schedule),
 
 pub const Event = enum (usize) { _ };
 
 const Self = @This();
 
-pub const ThreadRestriction = enum {
-	none,
-	main,
-};
-
 pub fn create_event(self: *Self, label: []const u8) std.mem.Allocator.Error!Event {
 	var systems = try system.Schedule.init(label);
 
@@ -48,7 +39,7 @@ pub fn deinit(self: *Self) void {
 
 	if (self.thread_pool) |thread_pool| {
 		thread_pool.deinit();
-		heap.allocator.destroy(thread_pool);
+		coral.heap.allocator.destroy(thread_pool);
 	}
 
 	self.event_systems.deinit();
@@ -56,25 +47,25 @@ pub fn deinit(self: *Self) void {
 	self.* = undefined;
 }
 
-pub fn get_resource(self: Self, thread_restriction: ThreadRestriction, comptime Resource: type) ?*Resource {
+pub fn get_resource(self: Self, comptime State: type) ?*State {
-	return @ptrCast(@alignCast(self.thread_restricted_resources[@intFromEnum(thread_restriction)].get(Resource)));
+	return @ptrCast(@alignCast(self.thread_restricted_resources[@intFromEnum(states.thread_restriction(State))].get(State)));
 }
 
-pub fn set_get_resource(self: *Self, thread_restriction: ThreadRestriction, value: anytype) std.mem.Allocator.Error!*@TypeOf(value) {
+pub fn set_get_resource(self: *Self, value: anytype) std.mem.Allocator.Error!*@TypeOf(value) {
-	return self.thread_restricted_resources[@intFromEnum(thread_restriction)].set_get(value);
+	return self.thread_restricted_resources[@intFromEnum(states.thread_restriction(@TypeOf(value)))].set_get(value);
 }
 
 pub fn init(thread_count: u32) std.Thread.SpawnError!Self {
 	var world = Self{
-		.thread_restricted_resources = .{resource.Table.init(), resource.Table.init()},
+		.thread_restricted_resources = .{states.Table.init(), states.Table.init()},
-		.event_systems = .{.allocator = heap.allocator},
+		.event_systems = .{.allocator = coral.heap.allocator},
 	};
 
 	if (thread_count != 0 and !builtin.single_threaded) {
-		const thread_pool = try heap.allocator.create(std.Thread.Pool);
+		const thread_pool = try coral.heap.allocator.create(std.Thread.Pool);
 
 		try thread_pool.init(.{
-			.allocator = heap.allocator,
+			.allocator = coral.heap.allocator,
 			.n_jobs = thread_count,
 		});
 
@@ -92,6 +83,6 @@ pub fn run_event(self: *Self, event: Event) anyerror!void {
 	try self.event_systems.values[@intFromEnum(event)].run(self);
 }
 
-pub fn set_resource(self: *Self, thread_restriction: ThreadRestriction, value: anytype) std.mem.Allocator.Error!void {
+pub fn set_resource(self: *Self, value: anytype) std.mem.Allocator.Error!void {
-	try self.thread_restricted_resources[@intFromEnum(thread_restriction)].set(value);
+	try self.thread_restricted_resources[@intFromEnum(states.thread_restriction(@TypeOf(value)))].set(value);
 }

src/flow/dag.zig

@@ -1,6 +1,4 @@
-const stack = @import("./stack.zig");
+const coral = @import("coral");
-
-const slices = @import("./slices.zig");
 
 const std = @import("std");
 
@@ -9,9 +7,9 @@ pub fn Graph(comptime Payload: type) type {
 		node_count: usize = 0,
 		table: NodeTables,
 
-		const NodeTables = stack.Parallel(struct {
+		const NodeTables = coral.stack.Parallel(struct {
 			payload: Payload,
-			edges: stack.Sequential(Node),
+			edges: coral.stack.Sequential(Node),
 			is_occupied: bool = true,
 			is_visited: bool = false,
 		});
@@ -82,7 +80,7 @@ pub fn Graph(comptime Payload: type) type {
 				return false;
 			};
 
-			if (slices.index_of(edges.values, 0, edge_node) == null) {
+			if (coral.slices.index_of(edges.values, 0, edge_node) == null) {
 				try edges.push_grow(edge_node);
 			}
 

src/flow/flow.zig

@@ -0,0 +1,273 @@
+const std = @import("std");
+
+pub const states = @import("./states.zig");
+
+pub const system = @import("./system.zig");
+
+pub const World = @import("./World.zig");
+
+pub fn Read(comptime Value: type) type {
+	return Shared(Value, .{
+		.thread_restriction = states.thread_restriction(Value),
+		.read_only = true,
+	});
+}
+
+pub const ShareInfo = struct {
+	thread_restriction: states.ThreadRestriction,
+	read_only: bool,
+};
+
+pub fn Shared(comptime Value: type, comptime info: ShareInfo) type {
+	const value_info = @typeInfo(Value);
+
+	const Qualified = switch (value_info) {
+		.Optional => @Type(.{
+			.Optional = .{
+				.child = .{
+					.Pointer = .{
+						.is_allowzero = false,
+						.sentinel = null,
+						.address_space = .generic,
+						.is_volatile = false,
+						.alignment = @alignOf(Value),
+						.size = .One,
+						.child = Value,
+						.is_const = info.read_only,
+					},
+				},
+			},
+		}),
+
+		else => @Type(.{
+			.Pointer = .{
+				.is_allowzero = false,
+				.sentinel = null,
+				.address_space = .generic,
+				.is_volatile = false,
+				.alignment = @alignOf(Value),
+				.size = .One,
+				.child = Value,
+				.is_const = info.read_only,
+			},
+		}),
+	};
+
+	return struct {
+		res: Qualified,
+
+		const Self = @This();
+
+		pub const State = struct {
+			res: Qualified,
+		};
+
+		pub fn bind(context: system.BindContext) std.mem.Allocator.Error!State {
+			const thread_restriction_name = switch (info.thread_restriction) {
+				.main => "main thread-restricted ",
+				.none => ""
+			};
+
+			const res = switch (info.read_only) {
+				true => (try context.register_readable_resource_access(Value)),
+				false => (try context.register_writable_resource_access(Value)),
+			};
+
+			return .{
+				.res = switch (value_info) {
+					.Optional => res,
+
+					else => res orelse {
+						@panic(std.fmt.comptimePrint("attempt to use {s}{s} {s} that has not yet been set", .{
+							thread_restriction_name,
+							if (info.read_only) "read-only" else "read-write",
+							@typeName(Value),
+						}));
+					},
+				},
+			};
+		}
+
+		pub fn init(state: *State) Self {
+			return .{
+				.res = state.res,
+			};
+		}
+	};
+}
+
+pub fn Write(comptime Value: type) type {
+	return Shared(Value, .{
+		.thread_restriction = states.thread_restriction(Value),
+		.read_only = false,
+	});
+}
+
+fn parameter_type(comptime Value: type) *const system.Info.Parameter {
+	const has_state = @hasDecl(Value, "State");
+
+	if (@sizeOf(Value) == 0) {
+		@compileError("System parameters must have a non-zero size");
+	}
+
+	const parameters = struct {
+		fn bind(allocator: std.mem.Allocator, context: system.BindContext) std.mem.Allocator.Error!?*anyopaque {
+			if (has_state) {
+				const value_name = @typeName(Value);
+
+				if (!@hasDecl(Value, "bind")) {
+					@compileError(
+						"a `bind` declaration on " ++
+						value_name ++
+						" is requied for parameter types with a `State` declaration");
+				}
+
+				const bind_type = @typeInfo(@TypeOf(Value.bind));
+
+				if (bind_type != .Fn) {
+					@compileError("`bind` declaration on " ++ value_name ++ " must be a fn");
+				}
+
+				if (bind_type.Fn.params.len != 1 or bind_type.Fn.params[0].type.? != system.BindContext) {
+					@compileError(
+						"`bind` fn on " ++
+						value_name ++
+						" must accept " ++
+						@typeName(system.BindContext) ++
+						" as it's one and only argument");
+				}
+
+				const state = try allocator.create(Value.State);
+
+				state.* = switch (bind_type.Fn.return_type.?) {
+					Value.State => Value.bind(context),
+					std.mem.Allocator.Error!Value.State => try Value.bind(context),
+					else => @compileError(
+						"`bind` fn on " ++
+						@typeName(Value) ++
+						" must return " ++
+						@typeName(Value.State) ++
+						" or " ++
+						@typeName(std.mem.Allocator.Error!Value.State)),
+				};
+
+				return @ptrCast(state);
+			} else {
+				return null;
+			}
+		}
+
+		fn init(argument: *anyopaque, state: ?*anyopaque) void {
+			const value_name = @typeName(Value);
+
+			if (!@hasDecl(Value, "init")) {
+				@compileError("an `init` declaration on " ++ value_name ++ " is requied for parameter types");
+			}
+
+			const init_type = @typeInfo(@TypeOf(Value.init));
+
+			if (init_type != .Fn) {
+				@compileError("`init` declaration on " ++ value_name ++ " must be a fn");
+			}
+
+			if (init_type.Fn.return_type.? != Value) {
+				@compileError("`init` fn on " ++ value_name ++ " must return a " ++ value_name);
+			}
+
+			const concrete_argument = @as(*Value, @ptrCast(@alignCast(argument)));
+
+			if (has_state) {
+				if (init_type.Fn.params.len != 1 or init_type.Fn.params[0].type.? != *Value.State) {
+					@compileError("`init` fn on stateful " ++ value_name ++ " must accept a " ++ @typeName(*Value.State));
+				}
+
+				concrete_argument.* = Value.init(@ptrCast(@alignCast(state.?)));
+			} else {
+				if (init_type.Fn.params.len != 0) {
+					@compileError("`init` fn on statelss " ++ value_name ++ " cannot use parameters");
+				}
+
+				concrete_argument.* = Value.init();
+			}
+		}
+
+		fn unbind(allocator: std.mem.Allocator, state: ?*anyopaque) void {
+			if (@hasDecl(Value, "unbind")) {
+				if (has_state) {
+					const typed_state = @as(*Value.State, @ptrCast(@alignCast(state.?)));
+
+					Value.unbind(typed_state);
+					allocator.destroy(typed_state);
+				} else {
+					Value.unbind();
+				}
+			}
+		}
+	};
+
+	return comptime &.{
+		.thread_restriction = if (@hasDecl(Value, "thread_restriction")) Value.thread_restriction else .none,
+		.init = parameters.init,
+		.bind = parameters.bind,
+		.unbind = parameters.unbind,
+	};
+}
+
+pub fn system_fn(comptime call: anytype) *const system.Info {
+	const Call = @TypeOf(call);
+
+	const system_info = comptime generate: {
+		switch (@typeInfo(Call)) {
+			.Fn => |call_fn| {
+				if (call_fn.params.len > system.max_parameters) {
+					@compileError("number of parameters to `call` cannot be more than 16");
+				}
+
+				const systems = struct {
+					fn run(parameters: []const *const system.Info.Parameter, data: *const [system.max_parameters]?*anyopaque) anyerror!void {
+						var call_args = @as(std.meta.ArgsTuple(Call), undefined);
+
+						inline for (parameters, &call_args, data[0 .. parameters.len]) |parameter, *call_arg, state| {
+							parameter.init(call_arg, state);
+						}
+
+						switch (@typeInfo(call_fn.return_type.?)) {
+							.Void => @call(.auto, call, call_args),
+							.ErrorUnion => try @call(.auto, call, call_args),
+							else => @compileError("number of parameters to `call` must return void or !void"),
+						}
+					}
+				};
+
+				var parameters = @as([system.max_parameters]*const system.Info.Parameter, undefined);
+				var thread_restriction = states.ThreadRestriction.none;
+
+				for (0 .. call_fn.params.len) |index| {
+					const CallParam = call_fn.params[index].type.?;
+					const parameter = parameter_type(CallParam);
+
+					if (parameter.thread_restriction != .none) {
+						if (thread_restriction != .none and thread_restriction != parameter.thread_restriction) {
+							@compileError("a system may not have conflicting thread restrictions");
+						}
+
+						thread_restriction = parameter.thread_restriction;
+					}
+
+					parameters[index] = parameter;
+				}
+
+				break: generate &.{
+					.parameters = parameters,
+					.parameter_count = call_fn.params.len,
+					.execute = systems.run,
+					.thread_restriction = thread_restriction,
+				};
+			},
+
+			else => @compileError("parameter `call` must be a function"),
+		}
+	};
+
+	return system_info;
+}

src/flow/states.zig

@@ -1,12 +1,10 @@
+const coral = @import("coral");
+
 const std = @import("std");
 
-const heap = @import("./heap.zig");
-
-const map = @import("./map.zig");
-
 pub const Table = struct {
 	arena: std.heap.ArenaAllocator,
-	table: map.Hashed(TypeID, Entry, map.enum_traits(TypeID)),
+	table: coral.map.Hashed(TypeID, Entry, coral.map.enum_traits(TypeID)),
 
 	const Entry = struct {
 		ptr: *anyopaque,
@@ -29,8 +27,8 @@ pub const Table = struct {
 
 	pub fn init() Table {
 		return .{
-			.arena = std.heap.ArenaAllocator.init(heap.allocator),
+			.arena = std.heap.ArenaAllocator.init(coral.heap.allocator),
-			.table = .{.allocator = heap.allocator},
+			.table = .{.allocator = coral.heap.allocator},
 		};
 	}
 
@@ -61,6 +59,11 @@ pub const Table = struct {
 	}
 };
 
+pub const ThreadRestriction = enum {
+	none,
+	main,
+};
+
 pub const TypeID = enum (usize) { _ };
 
 pub fn type_id(comptime T: type) TypeID {
@@ -74,3 +77,11 @@ pub fn type_id(comptime T: type) TypeID {
 
 	return @enumFromInt(@intFromPtr(&TypeHandle.byte));
 }
+
+pub fn thread_restriction(comptime State: type) ThreadRestriction {
+	if (@hasDecl(State, "thread_restriction")) {
+		return State.thread_restriction;
+	}
+
+	return .none;
+}

src/flow/system.zig

@@ -1,14 +1,8 @@
+const coral = @import("coral");
+
 const dag = @import("./dag.zig");
 
-const heap = @import("./heap.zig");
+const states = @import("./states.zig");
-
-const map = @import("./map.zig");
-
-const resource = @import("./resource.zig");
-
-const slices = @import("./slices.zig");
-
-const stack = @import("./stack.zig");
 
 const std = @import("std");
 
@@ -21,7 +15,7 @@ pub const BindContext = struct {
 
 	pub const ResourceAccess = std.meta.Tag(Schedule.ResourceAccess);
 
-	pub fn accesses_resource(self: BindContext, access: ResourceAccess, id: resource.TypeID) bool {
+	pub fn accesses_resource(self: BindContext, access: ResourceAccess, id: states.TypeID) bool {
 		const resource_accesses = &self.systems.graph.get_ptr(self.node).?.resource_accesses;
 
 		for (resource_accesses.values) |resource_access| {
@@ -43,12 +37,12 @@ pub const BindContext = struct {
 		return false;
 	}
 
-	pub fn register_read_write_resource_access(self: BindContext, thread_restriction: World.ThreadRestriction, comptime Resource: type) std.mem.Allocator.Error!?*Resource {
+	pub fn register_writable_resource_access(self: BindContext, comptime Resource: type) std.mem.Allocator.Error!?*Resource {
-		const value = self.world.get_resource(thread_restriction, Resource) orelse {
+		const value = self.world.get_resource(Resource) orelse {
 			return null;
 		};
 
-		const id = resource.type_id(Resource);
+		const id = states.type_id(Resource);
 
 		if (!self.accesses_resource(.read_write, id)) {
 			try self.systems.graph.get_ptr(self.node).?.resource_accesses.push_grow(.{.read_write = id});
@@ -57,26 +51,26 @@ pub const BindContext = struct {
 		const read_write_resource_nodes = lazily_create: {
 			break: lazily_create self.systems.read_write_resource_id_nodes.get_ptr(id) orelse insert: {
 				std.debug.assert(try self.systems.read_write_resource_id_nodes.emplace(id, .{
-					.allocator = heap.allocator,
+					.allocator = coral.heap.allocator,
 				}));
 
 				break: insert self.systems.read_write_resource_id_nodes.get_ptr(id).?;
 			};
 		};
 
-		if (slices.index_of(read_write_resource_nodes.values, 0, self.node) == null) {
+		if (coral.slices.index_of(read_write_resource_nodes.values, 0, self.node) == null) {
 			try read_write_resource_nodes.push_grow(self.node);
 		}
 
 		return value;
 	}
 
-	pub fn register_read_only_resource_access(self: BindContext, thread_restriction: World.ThreadRestriction, comptime Resource: type) std.mem.Allocator.Error!?*const Resource {
+	pub fn register_readable_resource_access(self: BindContext, comptime Resource: type) std.mem.Allocator.Error!?*const Resource {
-		const value = self.world.get_resource(thread_restriction, Resource) orelse {
+		const value = self.world.get_resource(Resource) orelse {
 			return null;
 		};
 
-		const id = resource.type_id(Resource);
+		const id = states.type_id(Resource);
 
 		if (!self.accesses_resource(.read_only, id)) {
 			try self.systems.graph.get_ptr(self.node).?.resource_accesses.push_grow(.{.read_only = id});
@@ -85,14 +79,14 @@ pub const BindContext = struct {
 		const read_only_resource_nodes = lazily_create: {
 			break: lazily_create self.systems.read_only_resource_id_nodes.get_ptr(id) orelse insert: {
 				std.debug.assert(try self.systems.read_only_resource_id_nodes.emplace(id, .{
-					.allocator = heap.allocator,
+					.allocator = coral.heap.allocator,
 				}));
 
 				break: insert self.systems.read_only_resource_id_nodes.get_ptr(id).?;
 			};
 		};
 
-		if (slices.index_of(read_only_resource_nodes.values, 0, self.node) == null) {
+		if (coral.slices.index_of(read_only_resource_nodes.values, 0, self.node) == null) {
 			try read_only_resource_nodes.push_grow(self.node);
 		}
 
@@ -104,10 +98,10 @@ pub const Info = struct {
 	execute: *const fn ([]const *const Parameter, *const [max_parameters]?*anyopaque) anyerror!void,
 	parameters: [max_parameters]*const Parameter = undefined,
 	parameter_count: u4 = 0,
-	thread_restriction: World.ThreadRestriction = .none,
+	thread_restriction: states.ThreadRestriction = .none,
 
 	pub const Parameter = struct {
-		thread_restriction: World.ThreadRestriction,
+		thread_restriction: states.ThreadRestriction,
 		init: *const fn (*anyopaque, ?*anyopaque) void,
 		bind: *const fn (std.mem.Allocator, BindContext) std.mem.Allocator.Error!?*anyopaque,
 		unbind: *const fn (std.mem.Allocator, ?*anyopaque) void,
@@ -128,7 +122,7 @@ pub const Schedule = struct {
 	label: [:0]const u8,
 	graph: Graph,
 	arena: std.heap.ArenaAllocator,
-	system_id_nodes: map.Hashed(usize, NodeBundle, map.usize_traits),
+	system_id_nodes: coral.map.Hashed(usize, NodeBundle, coral.map.usize_traits),
 	read_write_resource_id_nodes: ResourceNodeBundle,
 	read_only_resource_id_nodes: ResourceNodeBundle,
 	parallel_work_bundles: ParallelNodeBundles,
@@ -149,19 +143,19 @@ pub const Schedule = struct {
 		label: [:0]u8,
 		dependencies: []Dependency,
 		parameter_states: [max_parameters]?*anyopaque = [_]?*anyopaque{null} ** max_parameters,
-		resource_accesses: stack.Sequential(ResourceAccess),
+		resource_accesses: coral.stack.Sequential(ResourceAccess),
 	});
 
-	const NodeBundle = stack.Sequential(dag.Node);
+	const NodeBundle = coral.stack.Sequential(dag.Node);
 
-	const ParallelNodeBundles = stack.Sequential(NodeBundle);
+	const ParallelNodeBundles = coral.stack.Sequential(NodeBundle);
 
 	const ResourceAccess = union (enum) {
-		read_only: resource.TypeID,
+		read_only: states.TypeID,
-		read_write: resource.TypeID,
+		read_write: states.TypeID,
 	};
 
-	const ResourceNodeBundle = map.Hashed(resource.TypeID, NodeBundle, map.enum_traits(resource.TypeID));
+	const ResourceNodeBundle = coral.map.Hashed(states.TypeID, NodeBundle, coral.map.enum_traits(states.TypeID));
 
 	pub fn deinit(self: *Schedule) void {
 		{
@@ -198,8 +192,8 @@ pub const Schedule = struct {
 			}
 
 			system.resource_accesses.deinit();
-			heap.allocator.free(system.dependencies);
+			coral.heap.allocator.free(system.dependencies);
-			heap.allocator.free(system.label);
+			coral.heap.allocator.free(system.label);
 		}
 
 		for (self.parallel_work_bundles.values) |*bundle| {
@@ -304,7 +298,7 @@ pub const Schedule = struct {
 							continue;
 						}
 
-						try schedule.parallel_work_bundles.push_grow(.{.allocator = heap.allocator});
+						try schedule.parallel_work_bundles.push_grow(.{.allocator = coral.heap.allocator});
 
 						const bundle = schedule.parallel_work_bundles.get_ptr().?;
 
@@ -385,21 +379,21 @@ pub const Schedule = struct {
 	}
 
 	pub fn init(label: []const u8) std.mem.Allocator.Error!Schedule {
-		var arena = std.heap.ArenaAllocator.init(heap.allocator);
+		var arena = std.heap.ArenaAllocator.init(coral.heap.allocator);
 
 		errdefer arena.deinit();
 
 		const duped_label = try arena.allocator().dupeZ(u8, label);
 
 		return .{
-			.graph = Graph.init(heap.allocator),
+			.graph = Graph.init(coral.heap.allocator),
 			.label = duped_label,
 			.arena = arena,
-			.system_id_nodes = .{.allocator = heap.allocator},
+			.system_id_nodes = .{.allocator = coral.heap.allocator},
-			.read_write_resource_id_nodes = .{.allocator = heap.allocator},
+			.read_write_resource_id_nodes = .{.allocator = coral.heap.allocator},
-			.read_only_resource_id_nodes = .{.allocator = heap.allocator},
+			.read_only_resource_id_nodes = .{.allocator = coral.heap.allocator},
-			.parallel_work_bundles = .{.allocator = heap.allocator},
+			.parallel_work_bundles = .{.allocator = coral.heap.allocator},
-			.blocking_work = .{.allocator = heap.allocator},
+			.blocking_work = .{.allocator = coral.heap.allocator},
 		};
 	}
 
@@ -432,7 +426,7 @@ pub const Schedule = struct {
 
 		const dependencies = init: {
 			const total_run_orders = order.run_after.len + order.run_before.len;
-			const dependencies = try heap.allocator.alloc(Dependency, total_run_orders);
+			const dependencies = try coral.heap.allocator.alloc(Dependency, total_run_orders);
 			var dependencies_written = @as(usize, 0);
 
 			for (order.run_after) |after_system| {
@@ -456,17 +450,17 @@ pub const Schedule = struct {
 			break: init dependencies;
 		};
 
-		errdefer heap.allocator.free(dependencies);
+		errdefer coral.heap.allocator.free(dependencies);
 
-		const label = try heap.allocator.dupeZ(u8, if (order.label.len == 0) "anonymous system" else order.label);
+		const label = try coral.heap.allocator.dupeZ(u8, if (order.label.len == 0) "anonymous system" else order.label);
 
-		errdefer heap.allocator.free(label);
+		errdefer coral.heap.allocator.free(label);
 
 		const node = try self.graph.append(.{
 			.info = info,
 			.label = label,
 			.dependencies = dependencies,
-			.resource_accesses = .{.allocator = heap.allocator},
+			.resource_accesses = .{.allocator = coral.heap.allocator},
 		});
 
 		const system = self.graph.get_ptr(node).?;

src/main.zig

@@ -23,7 +23,7 @@ pub fn main() !void {
 	});
 }
 
-fn load(display: coral.Write(ona.gfx.Display), actors: coral.Write(Actors), assets: coral.Write(ona.gfx.Assets)) !void {
+fn load(display: ona.Write(ona.gfx.Display), actors: ona.Write(Actors), assets: ona.Write(ona.gfx.Assets)) !void {
 	display.res.width, display.res.height = .{1280, 720};
 	actors.res.body_texture = try assets.res.create_from_file(coral.files.bundle, "actor.bmp");
 	actors.res.quad_mesh_2d = try assets.res.create_quad_mesh_2d(@splat(1));
@@ -44,11 +44,11 @@ fn load(display: coral.Write(ona.gfx.Display), actors: coral.Write(Actors), asse
 	try actors.res.instances.push_grow(.{0, 0});
 }
 
-fn exit(actors: coral.Write(Actors)) void {
+fn exit(actors: ona.Write(Actors)) void {
 	actors.res.instances.deinit();
 }
 
-fn render(queue: ona.gfx.Queue, actors: coral.Write(Actors), display: coral.Read(ona.gfx.Display)) !void {
+fn render(queue: ona.gfx.Queue, actors: ona.Write(Actors), display: ona.Read(ona.gfx.Display)) !void {
 	try queue.commands.append(.{.target = .{
 		.texture = actors.res.render_texture.?,
 		.clear_color = .{0, 0, 0, 0},
@@ -85,19 +85,19 @@ fn render(queue: ona.gfx.Queue, actors: coral.Write(Actors), display: coral.Read
 	}});
 }
 
-fn update(player: coral.Read(Player), actors: coral.Write(Actors), mapping: coral.Read(ona.act.Mapping)) !void {
+fn update(player: ona.Read(Player), actors: ona.Write(Actors), mapping: ona.Read(ona.act.Mapping)) !void {
 	actors.res.instances.values[0] += .{
 		mapping.res.axis_strength(player.res.move_x) * 10,
 		mapping.res.axis_strength(player.res.move_y) * 10,
 	};
 }
 
-fn setup(world: *coral.World, events: ona.App.Events) !void {
+fn setup(world: *ona.World, events: ona.App.Events) !void {
-	try world.set_resource(.none, Actors{});
+	try world.set_resource(Actors{});
-	try world.set_resource(.none, Player{});
+	try world.set_resource(Player{});
 
-	try world.on_event(events.load, coral.system_fn(load), .{.label = "load"});
+	try world.on_event(events.load, ona.system_fn(load), .{.label = "load"});
-	try world.on_event(events.update, coral.system_fn(update), .{.label = "update"});
+	try world.on_event(events.update, ona.system_fn(update), .{.label = "update"});
-	try world.on_event(events.exit, coral.system_fn(exit), .{.label = "exit"});
+	try world.on_event(events.exit, ona.system_fn(exit), .{.label = "exit"});
-	try world.on_event(events.render, coral.system_fn(render), .{.label = "render actors"});
+	try world.on_event(events.render, ona.system_fn(render), .{.label = "render actors"});
 }

src/ona/App.zig

@@ -1,17 +1,19 @@
 const coral = @import("coral");
 
+const flow = @import("flow");
+
 events: *const Events,
 target_frame_time: f64,
 is_running: bool,
 
 pub const Events = struct {
-	load: coral.World.Event,
+	load: flow.World.Event,
-	pre_update: coral.World.Event,
+	pre_update: flow.World.Event,
-	update: coral.World.Event,
+	update: flow.World.Event,
-	post_update: coral.World.Event,
+	post_update: flow.World.Event,
-	render: coral.World.Event,
+	render: flow.World.Event,
-	finish: coral.World.Event,
+	finish: flow.World.Event,
-	exit: coral.World.Event,
+	exit: flow.World.Event,
 };
 
 const Self = @This();

src/ona/act.zig

@@ -2,6 +2,8 @@ const App = @import("./App.zig");
 
 const coral = @import("coral");
 
+const flow = @import("flow");
+
 const gfx = @import("./gfx.zig");
 
 const msg = @import("./msg.zig");
@@ -35,15 +37,15 @@ pub const Mapping = struct {
 	}
 };
 
-pub fn setup(world: *coral.World, events: App.Events) std.mem.Allocator.Error!void {
+pub fn setup(world: *flow.World, events: App.Events) std.mem.Allocator.Error!void {
-	try world.set_resource(.none, Mapping{});
+	try world.set_resource(Mapping{});
 
-	try world.on_event(events.pre_update, coral.system_fn(update), .{
+	try world.on_event(events.pre_update, flow.system_fn(update), .{
 		.label = "update act",
 	});
 }
 
-pub fn update(inputs: msg.Receive(gfx.Input), mapping: coral.Write(Mapping)) void {
+pub fn update(inputs: msg.Receive(gfx.Input), mapping: flow.Write(Mapping)) void {
 	mapping.res.keys_pressed = Mapping.ScancodeSet.initEmpty();
 
 	for (inputs.messages()) |message| {

src/ona/gfx.zig

@@ -6,27 +6,35 @@ const device = @import("./gfx/device.zig");
 
 const ext = @import("./ext.zig");
 
+const flow = @import("flow");
+
 const formats = @import("./gfx/formats.zig");
 
 const msg = @import("./msg.zig");
 
 const std = @import("std");
 
-pub const Assets = struct {
+pub const AssetFormat = struct {
-	context: device.Context,
+	extension: []const u8,
-	formats: coral.stack.Sequential(Format),
+	file_desc: *const FileDesc,
-	staging_arena: std.heap.ArenaAllocator,
 
-	pub const Format = struct {
+	pub const Error = std.mem.Allocator.Error || coral.files.Error || error {
-		extension: []const u8,
+		FormatUnsupported,
-		file_desc: *const fn (*std.heap.ArenaAllocator, coral.files.Storage, []const u8) Error!Desc,
-
-		pub const Error = std.mem.Allocator.Error || coral.files.Error || error {
-			FormatUnsupported,
-		};
 	};
 
-	pub fn create_from_file(self: *Assets, storage: coral.files.Storage, path: []const u8) (OpenError || Format.Error)!*Handle {
+	pub const FileDesc = fn (*std.heap.ArenaAllocator, coral.files.Storage, []const u8) Error!Desc;
+};
+
+pub const Assets = struct {
+	context: device.Context,
+	formats: coral.stack.Sequential(AssetFormat),
+	staging_arena: std.heap.ArenaAllocator,
+
+	pub fn create_from_file(
+		self: *Assets,
+		storage: coral.files.Storage,
+		path: []const u8,
+	) (OpenError || AssetFormat.Error)!*Handle {
 		defer {
 			const max_cache_size = 536870912;
 
@@ -62,6 +70,8 @@ pub const Assets = struct {
 			},
 		});
 	}
+
+	pub const thread_restriction = .main;
 };
 
 pub const Color = @Vector(4, f32);
@@ -163,7 +173,7 @@ pub const Queue = struct {
 		command_index: usize,
 	};
 
-	pub fn bind(_: coral.system.BindContext) std.mem.Allocator.Error!State {
+	pub fn bind(_: flow.system.BindContext) std.mem.Allocator.Error!State {
 		// TODO: Review how good of an idea this global state is, even if bind is guaranteed to always be ran on main.
 		if (renders.is_empty()) {
 			renders = .{.allocator = coral.heap.allocator};
@@ -207,7 +217,7 @@ pub const Transform2D = extern struct {
 	origin: Point2D = @splat(0),
 };
 
-const builtin_formats = [_]Assets.Format{
+const builtin_formats = [_]AssetFormat{
 	.{
 		.extension = "bmp",
 		.file_desc = formats.bmp_file_desc,
@@ -228,7 +238,7 @@ pub const colors = struct {
 	}
 };
 
-pub fn poll(app: coral.Write(App), inputs: msg.Send(Input)) !void {
+pub fn poll(app: flow.Write(App), inputs: msg.Send(Input)) !void {
 	var event = @as(ext.SDL_Event, undefined);
 
 	while (ext.SDL_PollEvent(&event) != 0) {
@@ -241,7 +251,7 @@ pub fn poll(app: coral.Write(App), inputs: msg.Send(Input)) !void {
 	}
 }
 
-pub fn setup(world: *coral.World, events: App.Events) (error {Unsupported} || std.Thread.SpawnError || std.mem.Allocator.Error)!void {
+pub fn setup(world: *flow.World, events: App.Events) (error {Unsupported} || std.Thread.SpawnError || std.mem.Allocator.Error)!void {
 	if (ext.SDL_Init(ext.SDL_INIT_VIDEO) != 0) {
 		return error.Unsupported;
 	}
@@ -250,32 +260,32 @@ pub fn setup(world: *coral.World, events: App.Events) (error {Unsupported} || st
 
 	errdefer context.deinit();
 
-	var registered_formats = coral.stack.Sequential(Assets.Format){.allocator = coral.heap.allocator};
+	var registered_formats = coral.stack.Sequential(AssetFormat){.allocator = coral.heap.allocator};
 
 	errdefer registered_formats.deinit();
 
 	try registered_formats.grow(builtin_formats.len);
 	std.debug.assert(registered_formats.push_all(&builtin_formats));
 
-	try world.set_resource(.none, Assets{
+	try world.set_resource(Assets{
 		.staging_arena = std.heap.ArenaAllocator.init(coral.heap.allocator),
 		.formats = registered_formats,
 		.context = context,
 	});
 
-	try world.set_resource(.none, Display{});
+	try world.set_resource(Display{});
-	try world.on_event(events.pre_update, coral.system_fn(poll), .{.label = "poll gfx"});
+	try world.on_event(events.pre_update, flow.system_fn(poll), .{.label = "poll gfx"});
-	try world.on_event(events.exit, coral.system_fn(stop), .{.label = "stop gfx"});
+	try world.on_event(events.exit, flow.system_fn(stop), .{.label = "stop gfx"});
-	try world.on_event(events.finish, coral.system_fn(synchronize), .{.label = "synchronize gfx"});
+	try world.on_event(events.finish, flow.system_fn(synchronize), .{.label = "synchronize gfx"});
 }
 
-pub fn stop(assets: coral.Write(Assets)) void {
+pub fn stop(assets: flow.Write(Assets)) void {
 	assets.res.staging_arena.deinit();
 	assets.res.formats.deinit();
 	assets.res.context.deinit();
 }
 
-pub fn synchronize(assets: coral.Write(Assets), display: coral.Read(Display)) !void {
+pub fn synchronize(assets: flow.Write(Assets), display: flow.Read(Display)) !void {
 	assets.res.context.submit(.{
 		.width = display.res.width,
 		.height = display.res.height,

src/ona/gfx/device.zig

@@ -2,14 +2,14 @@ const commands = @import("./commands.zig");
 
 const coral = @import("coral");
 
-const default_2d = @import("./shaders/default_2d.glsl.zig");
-
 const ext = @import("../ext.zig");
 
 const gfx = @import("../gfx.zig");
 
 const sokol = @import("sokol");
 
+const spirv = @import("./spirv.zig");
+
 const std = @import("std");
 
 pub const Context = struct {
@@ -125,7 +125,7 @@ pub const Context = struct {
 };
 
 const Frame = struct {
-	projection: default_2d.Mat4 = .{@splat(0), @splat(0), @splat(0), @splat(0)},
+	projection: Projection = .{@splat(0), @splat(0), @splat(0), @splat(0)},
 	flushed_batch_count: usize = 0,
 	pushed_batch_count: usize = 0,
 	render_passes: usize = 0,
@@ -380,7 +380,7 @@ const Loop = struct {
 			ext.SDL_GL_DeleteContext(context);
 		}
 
-		var rendering_2d = Rendering2D.init();
+		var rendering_2d = try Rendering2D.init(coral.heap.allocator);
 
 		defer rendering_2d.deinit();
 
@@ -455,6 +455,8 @@ const Loop = struct {
 	}
 };
 
+const Projection = [4]@Vector(4, f32);
+
 pub const RenderChain = commands.Chain(gfx.Command, clone_command);
 
 pub const RenderList = commands.List(gfx.Command, clone_command);
@@ -529,10 +531,7 @@ const Rendering2D = struct {
 		}
 
 		sokol.gfx.applyPipeline(self.batching_pipeline);
-
+		sokol.gfx.applyUniforms(.VS, 0, sokol.gfx.asRange(&frame.projection));
-		sokol.gfx.applyUniforms(.VS, default_2d.SLOT_Projection, sokol.gfx.asRange(&default_2d.Projection{
-			.projection = frame.projection,
-		}));
 
 		const mesh_2d = resource_cast(frame.mesh.?).payload.mesh_2d;
 
@@ -603,7 +602,7 @@ const Rendering2D = struct {
 		}
 	}
 
-	fn init() Rendering2D {
+	fn init(allocator: std.mem.Allocator) spirv.CompileError!Rendering2D {
 		sokol.gfx.setup(.{
 			.environment = .{
 				.defaults = .{
@@ -618,6 +617,18 @@ const Rendering2D = struct {
 			},
 		});
 
+		var arena = std.heap.ArenaAllocator.init(allocator);
+
+		defer arena.deinit();
+
+		const shader_desc = try spirv.compile(&arena, .{
+			.fragment_spirv = shader_sources.fragment_spirv[0 ..],
+			.vertex_spirv = shader_sources.vertex_spirv[0 ..],
+		});
+
+		std.log.info("{s}\n", .{shader_desc.fs.source});
+		std.log.info("{s}", .{shader_desc.vs.source});
+
 		return .{
 			.batching_pipeline = sokol.gfx.makePipeline(.{
 				.label = "2D drawing pipeline",
@@ -626,42 +637,42 @@ const Rendering2D = struct {
 					.attrs = get: {
 						var attrs = [_]sokol.gfx.VertexAttrState{.{}} ** 16;
 
-						attrs[default_2d.ATTR_vs_mesh_xy] = .{
+						attrs[0] = .{
 							.format = .FLOAT2,
 							.buffer_index = buffer_indices.mesh,
 						};
 
-						attrs[default_2d.ATTR_vs_mesh_uv] = .{
+						attrs[1] = .{
 							.format = .FLOAT2,
 							.buffer_index = buffer_indices.mesh,
 						};
 
-						attrs[default_2d.ATTR_vs_instance_xbasis] = .{
+						attrs[2] = .{
 							.format = .FLOAT2,
 							.buffer_index = buffer_indices.instance,
 						};
 
-						attrs[default_2d.ATTR_vs_instance_ybasis] = .{
+						attrs[3] = .{
 							.format = .FLOAT2,
 							.buffer_index = buffer_indices.instance,
 						};
 
-						attrs[default_2d.ATTR_vs_instance_origin] = .{
+						attrs[4] = .{
 							.format = .FLOAT2,
 							.buffer_index = buffer_indices.instance,
 						};
 
-						attrs[default_2d.ATTR_vs_instance_tint] = .{
+						attrs[5] = .{
 							.format = .UBYTE4N,
 							.buffer_index = buffer_indices.instance,
 						};
 
-						attrs[default_2d.ATTR_vs_instance_depth] = .{
+						attrs[6] = .{
 							.format = .FLOAT,
 							.buffer_index = buffer_indices.instance,
 						};
 
-						attrs[default_2d.ATTR_vs_instance_rect] = .{
+						attrs[7] = .{
 							.format = .FLOAT4,
 							.buffer_index = buffer_indices.instance,
 						};
@@ -678,7 +689,7 @@ const Rendering2D = struct {
 					},
 				},
 
-				.shader = sokol.gfx.makeShader(default_2d.draw2dShaderDesc(sokol.gfx.queryBackend())),
+				.shader = sokol.gfx.makeShader(shader_desc),
 				.index_type = .UINT16,
 			}),
 
@@ -698,7 +709,6 @@ const Rendering2D = struct {
 
 		var pass = sokol.gfx.Pass{
 			.action = .{
-				// TODO: Review if stencil buffer is needed.
 				.stencil = .{.load_action = .CLEAR},
 			},
 		};
@@ -725,7 +735,7 @@ const Rendering2D = struct {
 			const render_target = resource_cast(render_texture).payload.render_target;
 
 			pass.attachments = render_target.attachments;
-			frame.projection = ortho_projection(0.0, @floatFromInt(render_target.width), 0.0, @floatFromInt(render_target.height), -1.0, 1.0);
+			frame.projection = orthographic_projection(0.0, @floatFromInt(render_target.width), 0.0, @floatFromInt(render_target.height), -1.0, 1.0);
 		} else {
 			var target_width, var target_height = [_]c_int{0, 0};
 
@@ -741,11 +751,127 @@ const Rendering2D = struct {
 				.gl = .{.framebuffer = 0},
 			};
 
-			frame.projection = ortho_projection(0.0, @floatFromInt(target_width), @floatFromInt(target_height), 0.0, -1.0, 1.0);
+			frame.projection = orthographic_projection(0.0, @floatFromInt(target_width), @floatFromInt(target_height), 0.0, -1.0, 1.0);
 		}
 
 		sokol.gfx.beginPass(pass);
 	}
+
+	const shader_sources = .{
+		.vertex_spirv = &[_]u32{
+			0x07230203, 0x00010000, 0x0008000b, 0x00000053, 0x00000000, 0x00020011, 0x00000001, 0x0006000b,
+			0x00000001, 0x4c534c47, 0x6474732e, 0x3035342e, 0x00000000, 0x0003000e, 0x00000000, 0x00000001,
+			0x0010000f, 0x00000000, 0x00000004, 0x6e69616d, 0x00000000, 0x0000000b, 0x0000000d, 0x00000013,
+			0x0000001a, 0x00000034, 0x00000036, 0x0000003d, 0x0000003f, 0x00000042, 0x0000004c, 0x0000004e,
+			0x00030003, 0x00000002, 0x000001ae, 0x00040005, 0x00000004, 0x6e69616d, 0x00000000, 0x00060005,
+			0x00000009, 0x6c726f77, 0x6f705f64, 0x69746973, 0x00006e6f, 0x00060005, 0x0000000b, 0x74736e69,
+			0x65636e61, 0x69726f5f, 0x006e6967, 0x00040005, 0x0000000d, 0x6873656d, 0x0079785f, 0x00060005,
+			0x00000013, 0x74736e69, 0x65636e61, 0x6162785f, 0x00736973, 0x00060005, 0x0000001a, 0x74736e69,
+			0x65636e61, 0x6162795f, 0x00736973, 0x00070005, 0x0000001e, 0x6a6f7270, 0x65746365, 0x6f705f64,
+			0x69746973, 0x00006e6f, 0x00050005, 0x00000021, 0x6a6f7250, 0x69746365, 0x00006e6f, 0x00080006,
+			0x00000021, 0x00000000, 0x6a6f7270, 0x69746365, 0x6d5f6e6f, 0x69727461, 0x00000078, 0x00030005,
+			0x00000023, 0x00000000, 0x00060005, 0x00000032, 0x505f6c67, 0x65567265, 0x78657472, 0x00000000,
+			0x00060006, 0x00000032, 0x00000000, 0x505f6c67, 0x7469736f, 0x006e6f69, 0x00070006, 0x00000032,
+			0x00000001, 0x505f6c67, 0x746e696f, 0x657a6953, 0x00000000, 0x00070006, 0x00000032, 0x00000002,
+			0x435f6c67, 0x4470696c, 0x61747369, 0x0065636e, 0x00030005, 0x00000034, 0x00000000, 0x00060005,
+			0x00000036, 0x74736e69, 0x65636e61, 0x7065645f, 0x00006874, 0x00040005, 0x0000003d, 0x6f6c6f63,
+			0x00000072, 0x00060005, 0x0000003f, 0x74736e69, 0x65636e61, 0x6e69745f, 0x00000074, 0x00050005,
+			0x00000041, 0x74636572, 0x736f705f, 0x00000000, 0x00060005, 0x00000042, 0x74736e69, 0x65636e61,
+			0x6365725f, 0x00000074, 0x00050005, 0x00000045, 0x74636572, 0x7a69735f, 0x00000065, 0x00030005,
+			0x0000004c, 0x00007675, 0x00040005, 0x0000004e, 0x6873656d, 0x0076755f, 0x00040047, 0x0000000b,
+			0x0000001e, 0x00000004, 0x00040047, 0x0000000d, 0x0000001e, 0x00000000, 0x00040047, 0x00000013,
+			0x0000001e, 0x00000002, 0x00040047, 0x0000001a, 0x0000001e, 0x00000003, 0x00040048, 0x00000021,
+			0x00000000, 0x00000005, 0x00050048, 0x00000021, 0x00000000, 0x00000023, 0x00000000, 0x00050048,
+			0x00000021, 0x00000000, 0x00000007, 0x00000010, 0x00030047, 0x00000021, 0x00000002, 0x00040047,
+			0x00000023, 0x00000022, 0x00000000, 0x00040047, 0x00000023, 0x00000021, 0x00000000, 0x00050048,
+			0x00000032, 0x00000000, 0x0000000b, 0x00000000, 0x00050048, 0x00000032, 0x00000001, 0x0000000b,
+			0x00000001, 0x00050048, 0x00000032, 0x00000002, 0x0000000b, 0x00000003, 0x00030047, 0x00000032,
+			0x00000002, 0x00040047, 0x00000036, 0x0000001e, 0x00000006, 0x00040047, 0x0000003d, 0x0000001e,
+			0x00000000, 0x00040047, 0x0000003f, 0x0000001e, 0x00000005, 0x00040047, 0x00000042, 0x0000001e,
+			0x00000007, 0x00040047, 0x0000004c, 0x0000001e, 0x00000001, 0x00040047, 0x0000004e, 0x0000001e,
+			0x00000001, 0x00020013, 0x00000002, 0x00030021, 0x00000003, 0x00000002, 0x00030016, 0x00000006,
+			0x00000020, 0x00040017, 0x00000007, 0x00000006, 0x00000002, 0x00040020, 0x00000008, 0x00000007,
+			0x00000007, 0x00040020, 0x0000000a, 0x00000001, 0x00000007, 0x0004003b, 0x0000000a, 0x0000000b,
+			0x00000001, 0x0004003b, 0x0000000a, 0x0000000d, 0x00000001, 0x00040015, 0x0000000e, 0x00000020,
+			0x00000000, 0x0004002b, 0x0000000e, 0x0000000f, 0x00000000, 0x00040020, 0x00000010, 0x00000001,
+			0x00000006, 0x0004003b, 0x0000000a, 0x00000013, 0x00000001, 0x0004002b, 0x0000000e, 0x00000017,
+			0x00000001, 0x0004003b, 0x0000000a, 0x0000001a, 0x00000001, 0x00040017, 0x0000001f, 0x00000006,
+			0x00000004, 0x00040018, 0x00000020, 0x0000001f, 0x00000004, 0x0003001e, 0x00000021, 0x00000020,
+			0x00040020, 0x00000022, 0x00000002, 0x00000021, 0x0004003b, 0x00000022, 0x00000023, 0x00000002,
+			0x00040015, 0x00000024, 0x00000020, 0x00000001, 0x0004002b, 0x00000024, 0x00000025, 0x00000000,
+			0x00040020, 0x00000026, 0x00000002, 0x00000020, 0x0004002b, 0x00000006, 0x0000002a, 0x00000000,
+			0x0004002b, 0x00000006, 0x0000002b, 0x3f800000, 0x0004001c, 0x00000031, 0x00000006, 0x00000017,
+			0x0005001e, 0x00000032, 0x0000001f, 0x00000006, 0x00000031, 0x00040020, 0x00000033, 0x00000003,
+			0x00000032, 0x0004003b, 0x00000033, 0x00000034, 0x00000003, 0x0004003b, 0x00000010, 0x00000036,
+			0x00000001, 0x00040020, 0x0000003b, 0x00000003, 0x0000001f, 0x0004003b, 0x0000003b, 0x0000003d,
+			0x00000003, 0x00040020, 0x0000003e, 0x00000001, 0x0000001f, 0x0004003b, 0x0000003e, 0x0000003f,
+			0x00000001, 0x0004003b, 0x0000003e, 0x00000042, 0x00000001, 0x00040020, 0x0000004b, 0x00000003,
+			0x00000007, 0x0004003b, 0x0000004b, 0x0000004c, 0x00000003, 0x0004003b, 0x0000000a, 0x0000004e,
+			0x00000001, 0x00050036, 0x00000002, 0x00000004, 0x00000000, 0x00000003, 0x000200f8, 0x00000005,
+			0x0004003b, 0x00000008, 0x00000009, 0x00000007, 0x0004003b, 0x00000008, 0x0000001e, 0x00000007,
+			0x0004003b, 0x00000008, 0x00000041, 0x00000007, 0x0004003b, 0x00000008, 0x00000045, 0x00000007,
+			0x0004003d, 0x00000007, 0x0000000c, 0x0000000b, 0x00050041, 0x00000010, 0x00000011, 0x0000000d,
+			0x0000000f, 0x0004003d, 0x00000006, 0x00000012, 0x00000011, 0x0004003d, 0x00000007, 0x00000014,
+			0x00000013, 0x0005008e, 0x00000007, 0x00000015, 0x00000014, 0x00000012, 0x00050081, 0x00000007,
+			0x00000016, 0x0000000c, 0x00000015, 0x00050041, 0x00000010, 0x00000018, 0x0000000d, 0x00000017,
+			0x0004003d, 0x00000006, 0x00000019, 0x00000018, 0x0004003d, 0x00000007, 0x0000001b, 0x0000001a,
+			0x0005008e, 0x00000007, 0x0000001c, 0x0000001b, 0x00000019, 0x00050081, 0x00000007, 0x0000001d,
+			0x00000016, 0x0000001c, 0x0003003e, 0x00000009, 0x0000001d, 0x00050041, 0x00000026, 0x00000027,
+			0x00000023, 0x00000025, 0x0004003d, 0x00000020, 0x00000028, 0x00000027, 0x0004003d, 0x00000007,
+			0x00000029, 0x00000009, 0x00050051, 0x00000006, 0x0000002c, 0x00000029, 0x00000000, 0x00050051,
+			0x00000006, 0x0000002d, 0x00000029, 0x00000001, 0x00070050, 0x0000001f, 0x0000002e, 0x0000002c,
+			0x0000002d, 0x0000002a, 0x0000002b, 0x00050091, 0x0000001f, 0x0000002f, 0x00000028, 0x0000002e,
+			0x0007004f, 0x00000007, 0x00000030, 0x0000002f, 0x0000002f, 0x00000000, 0x00000001, 0x0003003e,
+			0x0000001e, 0x00000030, 0x0004003d, 0x00000007, 0x00000035, 0x0000001e, 0x0004003d, 0x00000006,
+			0x00000037, 0x00000036, 0x00050051, 0x00000006, 0x00000038, 0x00000035, 0x00000000, 0x00050051,
+			0x00000006, 0x00000039, 0x00000035, 0x00000001, 0x00070050, 0x0000001f, 0x0000003a, 0x00000038,
+			0x00000039, 0x00000037, 0x0000002b, 0x00050041, 0x0000003b, 0x0000003c, 0x00000034, 0x00000025,
+			0x0003003e, 0x0000003c, 0x0000003a, 0x0004003d, 0x0000001f, 0x00000040, 0x0000003f, 0x0003003e,
+			0x0000003d, 0x00000040, 0x0004003d, 0x0000001f, 0x00000043, 0x00000042, 0x0007004f, 0x00000007,
+			0x00000044, 0x00000043, 0x00000043, 0x00000000, 0x00000001, 0x0003003e, 0x00000041, 0x00000044,
+			0x0004003d, 0x0000001f, 0x00000046, 0x00000042, 0x0007004f, 0x00000007, 0x00000047, 0x00000046,
+			0x00000046, 0x00000002, 0x00000003, 0x0004003d, 0x0000001f, 0x00000048, 0x00000042, 0x0007004f,
+			0x00000007, 0x00000049, 0x00000048, 0x00000048, 0x00000000, 0x00000001, 0x00050083, 0x00000007,
+			0x0000004a, 0x00000047, 0x00000049, 0x0003003e, 0x00000045, 0x0000004a, 0x0004003d, 0x00000007,
+			0x0000004d, 0x00000041, 0x0004003d, 0x00000007, 0x0000004f, 0x0000004e, 0x0004003d, 0x00000007,
+			0x00000050, 0x00000045, 0x00050085, 0x00000007, 0x00000051, 0x0000004f, 0x00000050, 0x00050081,
+			0x00000007, 0x00000052, 0x0000004d, 0x00000051, 0x0003003e, 0x0000004c, 0x00000052, 0x000100fd,
+			0x00010038,
+		},
+
+		.fragment_spirv = &[_]u32{
+			0x07230203, 0x00010000, 0x0008000b, 0x00000028, 0x00000000, 0x00020011, 0x00000001, 0x0006000b,
+			0x00000001, 0x4c534c47, 0x6474732e, 0x3035342e, 0x00000000, 0x0003000e, 0x00000000, 0x00000001,
+			0x0008000f, 0x00000004, 0x00000004, 0x6e69616d, 0x00000000, 0x00000009, 0x00000016, 0x0000001a,
+			0x00030010, 0x00000004, 0x00000007, 0x00030003, 0x00000002, 0x000001ae, 0x00040005, 0x00000004,
+			0x6e69616d, 0x00000000, 0x00040005, 0x00000009, 0x65786574, 0x0000006c, 0x00030005, 0x0000000c,
+			0x00786574, 0x00030005, 0x00000010, 0x00706d73, 0x00030005, 0x00000016, 0x00007675, 0x00040005,
+			0x0000001a, 0x6f6c6f63, 0x00000072, 0x00040047, 0x00000009, 0x0000001e, 0x00000000, 0x00040047,
+			0x0000000c, 0x00000022, 0x00000000, 0x00040047, 0x0000000c, 0x00000021, 0x00000000, 0x00040047,
+			0x00000010, 0x00000022, 0x00000000, 0x00040047, 0x00000010, 0x00000021, 0x00000000, 0x00040047,
+			0x00000016, 0x0000001e, 0x00000001, 0x00040047, 0x0000001a, 0x0000001e, 0x00000000, 0x00020013,
+			0x00000002, 0x00030021, 0x00000003, 0x00000002, 0x00030016, 0x00000006, 0x00000020, 0x00040017,
+			0x00000007, 0x00000006, 0x00000004, 0x00040020, 0x00000008, 0x00000003, 0x00000007, 0x0004003b,
+			0x00000008, 0x00000009, 0x00000003, 0x00090019, 0x0000000a, 0x00000006, 0x00000001, 0x00000000,
+			0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00040020, 0x0000000b, 0x00000000, 0x0000000a,
+			0x0004003b, 0x0000000b, 0x0000000c, 0x00000000, 0x0002001a, 0x0000000e, 0x00040020, 0x0000000f,
+			0x00000000, 0x0000000e, 0x0004003b, 0x0000000f, 0x00000010, 0x00000000, 0x0003001b, 0x00000012,
+			0x0000000a, 0x00040017, 0x00000014, 0x00000006, 0x00000002, 0x00040020, 0x00000015, 0x00000001,
+			0x00000014, 0x0004003b, 0x00000015, 0x00000016, 0x00000001, 0x00040020, 0x00000019, 0x00000001,
+			0x00000007, 0x0004003b, 0x00000019, 0x0000001a, 0x00000001, 0x00040015, 0x0000001d, 0x00000020,
+			0x00000000, 0x0004002b, 0x0000001d, 0x0000001e, 0x00000003, 0x00040020, 0x0000001f, 0x00000003,
+			0x00000006, 0x0004002b, 0x00000006, 0x00000022, 0x00000000, 0x00020014, 0x00000023, 0x00050036,
+			0x00000002, 0x00000004, 0x00000000, 0x00000003, 0x000200f8, 0x00000005, 0x0004003d, 0x0000000a,
+			0x0000000d, 0x0000000c, 0x0004003d, 0x0000000e, 0x00000011, 0x00000010, 0x00050056, 0x00000012,
+			0x00000013, 0x0000000d, 0x00000011, 0x0004003d, 0x00000014, 0x00000017, 0x00000016, 0x00050057,
+			0x00000007, 0x00000018, 0x00000013, 0x00000017, 0x0004003d, 0x00000007, 0x0000001b, 0x0000001a,
+			0x00050085, 0x00000007, 0x0000001c, 0x00000018, 0x0000001b, 0x0003003e, 0x00000009, 0x0000001c,
+			0x00050041, 0x0000001f, 0x00000020, 0x00000009, 0x0000001e, 0x0004003d, 0x00000006, 0x00000021,
+			0x00000020, 0x000500b4, 0x00000023, 0x00000024, 0x00000021, 0x00000022, 0x000300f7, 0x00000026,
+			0x00000000, 0x000400fa, 0x00000024, 0x00000025, 0x00000026, 0x000200f8, 0x00000025, 0x000100fc,
+			0x000200f8, 0x00000026, 0x000100fd, 0x00010038,
+		},
+	};
 };
 
 const Resource = struct {
@@ -805,19 +931,19 @@ fn clone_command(self: gfx.Command, arena: *std.heap.ArenaAllocator) std.mem.All
 	};
 }
 
+fn orthographic_projection(left: f32, right: f32, bottom: f32, top: f32, zNear: f32, zFar: f32) Projection {
+	const width = right - left;
+	const height = top - bottom;
+	const depth = zFar - zNear;
+
+	return .{
+		.{2 / width, 0, 0, 0},
+		.{0, 2 / height, 0, 0},
+		.{0, 0, -(2 / depth), 0},
+		.{-((right + left) / width), -((top + bottom) / height), -((zFar + zNear) / depth), 1},
+	};
+}
+
 fn resource_cast(handle: *gfx.Handle) *Resource {
 	return @ptrCast(@alignCast(handle));
 }
-
-fn ortho_projection(left: f32, right: f32, bottom: f32, top: f32, zNear: f32, zFar: f32) default_2d.Mat4 {
-    var result = default_2d.Mat4{.{1, 0, 0, 0}, .{0, 1, 0, 0}, .{0, 0, 1, 0}, .{0, 0, 0, 1}};
-
-    result[0][0] = 2 / (right - left);
-    result[1][1] = 2 / (top - bottom);
-    result[2][2] = - 2 / (zFar - zNear);
-    result[3][0] = - (right + left) / (right - left);
-    result[3][1] = - (top + bottom) / (top - bottom);
-    result[3][2] = - (zFar + zNear) / (zFar - zNear);
-
-    return result;
-}

src/ona/gfx/formats.zig

@@ -8,7 +8,7 @@ pub fn bmp_file_desc(
 	arena: *std.heap.ArenaAllocator,
 	storage: coral.files.Storage,
 	path: []const u8,
-) gfx.Assets.Format.Error!gfx.Desc {
+) gfx.AssetFormat.Error!gfx.Desc {
 	const header = try storage.read_little(path, 0, extern struct {
 		type: [2]u8 align (1),
 		file_size: u32 align (1),

src/ona/gfx/shaders/default_2d.glsl

@@ -1,60 +0,0 @@
-@header pub const Vec2 = @Vector(2, f32)
-@header pub const Mat4 = [4]@Vector(4, f32)
-@ctype vec2 Vec2
-@ctype mat4 Mat4
-
-@vs vs
-in vec2 mesh_xy;
-in vec2 mesh_uv;
-
-in vec2 instance_xbasis;
-in vec2 instance_ybasis;
-in vec2 instance_origin;
-in vec4 instance_tint;
-in float instance_depth;
-in vec4 instance_rect;
-
-uniform Projection {
-	mat4 projection;
-};
-
-out vec4 color;
-out vec2 uv;
-
-void main() {
-	// Calculate the world position of the vertex
-	const vec2 world_position = instance_origin + mesh_xy.x * instance_xbasis + mesh_xy.y * instance_ybasis;
-	const vec2 projected_position = (projection * vec4(world_position, 0, 1)).xy;
-
-	// Set the position of the vertex in clip space
-	gl_Position = vec4(projected_position, instance_depth, 1.0);
-	color = instance_tint;
-
-	// Calculate the width and height from left, top, right, bottom configuration
-	const vec2 rect_pos = instance_rect.xy; // left, top
-	const vec2 rect_size = instance_rect.zw - instance_rect.xy; // right - left, bottom - top
-
-	// Calculate the adjusted UV coordinates using the instance_rect
-	uv = rect_pos + (mesh_uv * rect_size);
-}
-@end
-
-@fs fs
-uniform texture2D tex;
-uniform sampler smp;
-
-in vec4 color;
-in vec2 uv;
-
-out vec4 texel;
-
-void main() {
-	texel = texture(sampler2D(tex, smp), uv) * color;
-
-	if (texel.a == 0) {
-		discard;
-	}
-}
-@end
-
-@program draw_2d vs fs

src/ona/gfx/shaders/render_2d.frag

@@ -0,0 +1,17 @@
+#version 430
+
+layout (binding = 0) uniform texture2D tex;
+layout (binding = 0) uniform sampler smp;
+
+layout (location = 0) in vec4 color;
+layout (location = 1) in vec2 uv;
+
+layout (location = 0) out vec4 texel;
+
+void main() {
+	texel = texture(sampler2D(tex, smp), uv) * color;
+
+	if (texel.a == 0) {
+		discard;
+	}
+}

src/ona/gfx/shaders/render_2d.vert

@@ -0,0 +1,36 @@
+#version 430
+
+layout (location = 0) in vec2 mesh_xy;
+layout (location = 1) in vec2 mesh_uv;
+
+layout (location = 2) in vec2 instance_xbasis;
+layout (location = 3) in vec2 instance_ybasis;
+layout (location = 4) in vec2 instance_origin;
+layout (location = 5) in vec4 instance_tint;
+layout (location = 6) in float instance_depth;
+layout (location = 7) in vec4 instance_rect;
+
+layout (binding = 0) uniform Projection {
+	mat4 projection_matrix;
+};
+
+layout (location = 0) out vec4 color;
+layout (location = 1) out vec2 uv;
+
+void main() {
+	// Calculate the world position of the vertex
+	const vec2 world_position = instance_origin + mesh_xy.x * instance_xbasis + mesh_xy.y * instance_ybasis;
+	const vec2 projected_position = (projection_matrix * vec4(world_position, 0, 1)).xy;
+
+	// Set the position of the vertex in clip space
+	gl_Position = vec4(projected_position, instance_depth, 1.0);
+	color = instance_tint;
+
+	// Calculate the width and height from left, top, right, bottom configuration
+	const vec2 rect_pos = instance_rect.xy; // left, top
+	const vec2 rect_size = instance_rect.zw - instance_rect.xy; // right - left, bottom - top
+
+	// Calculate the adjusted UV coordinates using the instance_rect
+	uv = rect_pos + (mesh_uv * rect_size);
+}
+

src/ona/gfx/spirv.zig

@@ -0,0 +1,130 @@
+const coral = @import("coral");
+
+const ext = @cImport({
+	@cInclude("spirv-cross/spirv_cross_c.h");
+});
+
+const sokol = @import("sokol");
+
+const std = @import("std");
+
+pub const CompileError = std.mem.Allocator.Error || error {
+	UnsupportedTarget,
+	InvalidSpirV,
+	UnsupportedSpirv,
+	UnknownFailure,
+};
+
+pub const Sources = struct {
+	vertex_spirv: []const u32,
+	fragment_spirv: []const u32,
+};
+
+pub fn compile(arena: *std.heap.ArenaAllocator, sources: Sources) CompileError!sokol.gfx.ShaderDesc {
+	var context = @as(ext.spvc_context, null);
+
+	try switch (ext.spvc_context_create(&context)) {
+		ext.SPVC_ERROR_OUT_OF_MEMORY => error.OutOfMemory,
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	ext.spvc_context_set_error_callback(context, log_errors, null);
+
+	defer ext.spvc_context_destroy(context);
+
+	const arena_allocator = arena.allocator();
+	const shader_source_sentinel = @as(u8, 0);
+
+	return .{
+		.vs = .{
+			.source = try arena_allocator.dupeZ(u8, coral.io.slice_sentineled(
+				shader_source_sentinel,
+				@ptrCast(try compile_shader(context, ext.SpvExecutionModelVertex, sources.vertex_spirv)))),
+		},
+
+		.fs = .{
+			.source = try arena_allocator.dupeZ(u8, coral.io.slice_sentineled(
+				shader_source_sentinel,
+				@ptrCast(try compile_shader(context, ext.SpvExecutionModelFragment, sources.fragment_spirv)))),
+		},
+	};
+}
+
+fn compile_shader(context: ext.spvc_context, model: ext.SpvExecutionModel, spirv: []const u32) CompileError![*]const u8 {
+	var parsed_ir = @as(ext.spvc_parsed_ir, null);
+
+	try switch (ext.spvc_context_parse_spirv(context, spirv.ptr, spirv.len, &parsed_ir)) {
+		ext.SPVC_ERROR_OUT_OF_MEMORY => error.OutOfMemory,
+		ext.SPVC_ERROR_INVALID_SPIRV => error.InvalidSpirV,
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	var compiler = @as(ext.spvc_compiler, null);
+
+	try switch (ext.spvc_context_create_compiler(context, ext.SPVC_BACKEND_GLSL, parsed_ir, ext.SPVC_CAPTURE_MODE_TAKE_OWNERSHIP, &compiler)) {
+		ext.SPVC_ERROR_OUT_OF_MEMORY => error.OutOfMemory,
+		ext.SPVC_ERROR_INVALID_ARGUMENT => error.UnsupportedTarget,
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	try switch (ext.spvc_compiler_build_combined_image_samplers(compiler)) {
+		ext.SPVC_ERROR_UNSUPPORTED_SPIRV => error.UnsupportedSpirv,
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	try switch (ext.spvc_compiler_set_entry_point(compiler, "main", model)) {
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	var options = @as(ext.spvc_compiler_options, null);
+
+	try switch (ext.spvc_compiler_create_compiler_options(compiler, &options)) {
+		ext.SPVC_ERROR_OUT_OF_MEMORY => error.OutOfMemory,
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	try switch (ext.spvc_compiler_options_set_uint(options, ext.SPVC_COMPILER_OPTION_GLSL_VERSION, 430)) {
+		ext.SPVC_ERROR_INVALID_ARGUMENT => error.InvalidSpirV,
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	try switch (ext.spvc_compiler_options_set_bool(options, ext.SPVC_COMPILER_OPTION_GLSL_ES, @intFromBool(false))) {
+		ext.SPVC_ERROR_INVALID_ARGUMENT => error.InvalidSpirV,
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	try switch (ext.spvc_compiler_options_set_bool(options, ext.SPVC_COMPILER_OPTION_GLSL_VULKAN_SEMANTICS, @intFromBool(false))) {
+		ext.SPVC_ERROR_INVALID_ARGUMENT => error.InvalidSpirV,
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	try switch (ext.spvc_compiler_install_compiler_options(compiler, options)) {
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	var source = @as([*]const u8, undefined);
+
+	try switch (ext.spvc_compiler_compile(compiler, @ptrCast(&source))) {
+		ext.SPVC_ERROR_OUT_OF_MEMORY => error.OutOfMemory,
+		ext.SPVC_ERROR_UNSUPPORTED_SPIRV => error.UnsupportedSpirv,
+		ext.SPVC_SUCCESS => {},
+		else => error.UnknownFailure,
+	};
+
+	return source;
+}
+
+fn log_errors(userdata: ?*anyopaque, error_message: [*c]const u8) callconv(.C) void {
+	std.debug.assert(userdata == null);
+	std.log.err("{s}", .{error_message});
+}

src/ona/msg.zig

@@ -2,6 +2,8 @@ const App = @import("./App.zig");
 
 const coral = @import("coral");
 
+const flow = @import("flow");
+
 const std = @import("std");
 
 fn Channel(comptime Message: type) type {
@@ -12,7 +14,7 @@ fn Channel(comptime Message: type) type {
 
 		const Self = @This();
 
-		fn cleanup(channel: coral.Write(Self)) void {
+		fn cleanup(channel: flow.Write(Self)) void {
 			channel.res.deinit();
 		}
 
@@ -24,7 +26,7 @@ fn Channel(comptime Message: type) type {
 			self.* = undefined;
 		}
 
-		fn swap(channel: coral.Write(Self)) void {
+		fn swap(channel: flow.Write(Self)) void {
 			channel.res.ticks = coral.scalars.add(channel.res.ticks, 1) orelse 0;
 
 			if (channel.res.ticks == 0) {
@@ -65,12 +67,12 @@ pub fn Receive(comptime Message: type) type {
 			channel: *const TypedChannel,
 		};
 
-		pub fn bind(context: coral.system.BindContext) std.mem.Allocator.Error!State {
+		pub fn bind(context: flow.system.BindContext) std.mem.Allocator.Error!State {
 			return .{
-				.channel = (try context.register_read_only_resource_access(thread_restriction, TypedChannel)) orelse set: {
+				.channel = (try context.register_readable_resource_access(TypedChannel)) orelse set: {
-					try context.world.set_resource(thread_restriction, TypedChannel.init(coral.heap.allocator));
+					try context.world.set_resource(TypedChannel.init(coral.heap.allocator));
 
-					break: set (try context.register_read_only_resource_access(thread_restriction, TypedChannel)).?;
+					break: set (try context.register_readable_resource_access(TypedChannel)).?;
 				},
 			};
 		}
@@ -99,22 +101,22 @@ pub fn Send(comptime Message: type) type {
 			channel: *TypedChannel,
 		};
 
-		pub fn bind(context: coral.system.BindContext) std.mem.Allocator.Error!State {
+		pub fn bind(context: flow.system.BindContext) std.mem.Allocator.Error!State {
 			return .{
-				.channel = (try context.register_read_write_resource_access(thread_restriction, TypedChannel)) orelse set: {
+				.channel = (try context.register_writable_resource_access(TypedChannel)) orelse set: {
-					try context.world.set_resource(thread_restriction, TypedChannel.init(coral.heap.allocator));
+					try context.world.set_resource(TypedChannel.init(coral.heap.allocator));
 
-					const app = context.world.get_resource(.none, App).?;
+					const app = context.world.get_resource(App).?;
 
-					try context.world.on_event(app.events.post_update, coral.system_fn(TypedChannel.swap), .{
+					try context.world.on_event(app.events.post_update, flow.system_fn(TypedChannel.swap), .{
 						.label = "swap channel of " ++ @typeName(Message),
 					});
 
-					try context.world.on_event(app.events.exit, coral.system_fn(TypedChannel.cleanup), .{
+					try context.world.on_event(app.events.exit, flow.system_fn(TypedChannel.cleanup), .{
 						.label = "clean up channel of " ++ @typeName(Message),
 					});
 
-					break: set (try context.register_read_write_resource_access(thread_restriction, TypedChannel)).?;
+					break: set (try context.register_writable_resource_access(TypedChannel)).?;
 				},
 			};
 		}
@@ -130,5 +132,3 @@ pub fn Send(comptime Message: type) type {
 		}
 	};
 }
-
-const thread_restriction = coral.World.ThreadRestriction.none;

src/ona/ona.zig

@@ -6,6 +6,8 @@ const coral = @import("coral");
 
 const ext = @import("./ext.zig");
 
+const flow = @import("flow");
+
 pub const gfx = @import("./gfx.zig");
 
 pub const msg = @import("./msg.zig");
@@ -23,7 +25,13 @@ pub const Options = struct {
 	};
 };
 
-pub const Setup = fn (*coral.World, App.Events) anyerror!void;
+pub const Read = flow.Read;
+
+pub const Setup = fn (*flow.World, App.Events) anyerror!void;
+
+pub const World = flow.World;
+
+pub const Write = flow.Write;
 
 pub const default_middlewares = &.{
 	gfx.setup,
@@ -37,7 +45,7 @@ pub fn start_app(setup: Setup, options: Options) anyerror!void {
 	}
 
 	var world = try switch (options.execution) {
-		.single_threaded => coral.World.init(0),
+		.single_threaded => flow.World.init(0),
 
 		.thread_share => |thread_share| init: {
 			const cpu_count = @as(u32, @intCast(std.math.clamp(std.Thread.getCpuCount() catch |cpu_count_error| {
@@ -48,7 +56,7 @@ pub fn start_app(setup: Setup, options: Options) anyerror!void {
 				});
 			}, 0, std.math.maxInt(u32))));
 
-			break: init coral.World.init(coral.scalars.fractional(cpu_count, thread_share) orelse 0);
+			break: init flow.World.init(coral.scalars.fractional(cpu_count, thread_share) orelse 0);
 		},
 	};
 
@@ -64,7 +72,7 @@ pub fn start_app(setup: Setup, options: Options) anyerror!void {
 		.exit = try world.create_event("exit"),
 	};
 
-	const app = try world.set_get_resource(.none, App{
+	const app = try world.set_get_resource(App{
 		.events = &events,
 		.target_frame_time = 1.0 / @as(f64, @floatFromInt(options.tick_rate)),
 		.is_running = true,
@@ -101,3 +109,5 @@ pub fn start_app(setup: Setup, options: Options) anyerror!void {
 
 	try world.run_event(events.exit);
 }
+
+pub const system_fn = flow.system_fn;