Move builtin decoding responsibility to compiler

source/ona/file.zig

@@ -3,10 +3,13 @@ const coral = @import("coral");
 const ext = @import("./ext.zig");
 
 pub const Access = union (enum) {
+	null,
     sandboxed_path: *const Path,
 
 	pub fn open_readable(self: Access, readable_path: Path) ?*Readable {
 		switch (self) {
+			.null => return null,
+
 			.sandboxed_path => |sandboxed_path| {
 				const readable_path_string = sandboxed_path.joined(readable_path).to_string() orelse return null;
 
@@ -17,6 +20,8 @@ pub const Access = union (enum) {
 
 	pub fn query(self: Access, path: Path) ?Info {
 		switch (self) {
+			.null => return null,
+
 			.sandboxed_path => |sandboxed_path| {
 				const path_string = sandboxed_path.joined(path).to_string() orelse return null;
 				const rw_ops = ext.SDL_RWFromFile(path_string, "rb") orelse return null;

source/ona/kym.zig

@@ -164,12 +164,18 @@ pub const RuntimeEnv = struct {
 						try self.compile_expression(chunk, grouped_expression.*);
 					},
 
-					.import => {
-						try chunk.opcodes.push_one(.{.push_builtin = .import});
-					},
+					.builtin => |builtin| {
+						coral.debug.assert(builtin.len != 0);
 
-					.print => {
-						try chunk.opcodes.push_one(.{.push_builtin = .print});
+						const decoded_builtin = @as(?Builtin, switch (builtin[0]) {
+							'i' => if (coral.io.ends_with(builtin, "mport")) .import else null,
+							'p' => if (coral.io.ends_with(builtin, "rint")) .print else null,
+							else => null,
+						});
+
+						try chunk.opcodes.push_one(.{.push_builtin = decoded_builtin orelse {
+							return chunk.env.raise(error.BadSyntax, "unknown builtin");
+						}});
 					},
 
 					.local_get => |local_get| {
@@ -802,9 +808,9 @@ pub const RuntimeEnv = struct {
 	});
 
 	pub const Options = struct {
-		import_access: file.Access,
-		print: *const Printer,
-		print_error: *const Printer,
+		import_access: file.Access = .null,
+		print: ?*const Printer = null,
+		print_error: ?*const Printer = null,
 	};
 
 	pub const Printer = fn (buffer: []const coral.io.Byte) void;
@@ -1185,21 +1191,29 @@ pub const RuntimeEnv = struct {
 	}
 
 	pub fn print(self: *RuntimeEnv, buffer: []const coral.io.Byte) void {
-		self.options.print(buffer);
+		if (self.options.print) |bound_print| {
+			bound_print(buffer);
+		}
+	}
+
+	pub fn print_error(self: *RuntimeEnv, buffer: []const coral.io.Byte) void {
+		if (self.options.print_error) |bound_print_error| {
+			bound_print_error(buffer);
+		}
 	}
 
 	pub fn raise(self: *RuntimeEnv, error_value: RuntimeError, message: []const coral.io.Byte) RuntimeError {
-		self.options.print_error(message);
+		self.print_error(message);
 
 		if (!self.frames.is_empty()) {
-			self.options.print_error("stack trace:");
+			self.print_error("stack trace:");
 
 			var remaining_frames = self.frames.values.len;
 
 			while (remaining_frames != 0) {
 				remaining_frames -= 1;
 
-				self.options.print_error(self.frames.values[remaining_frames].name);
+				self.print_error(self.frames.values[remaining_frames].name);
 			}
 		}
 

source/ona/kym/Ast.zig

@@ -13,8 +13,7 @@ pub const Expression = union (enum) {
 	nil_literal,
 	true_literal,
 	false_literal,
-	import,
-	print,
+	builtin: []const coral.io.Byte,
 	number_literal: []const coral.io.Byte,
 	string_literal: []const coral.io.Byte,
 	symbol_literal: []const coral.io.Byte,
@@ -354,25 +353,8 @@ fn parse_factor(self: *Self) ParseError!Expression {
 
 			.builtin => |builtin| {
 				self.tokenizer.skip_newlines();
-				coral.debug.assert(builtin.len != 0);
 
-				switch (builtin[0]) {
-					'i' => {
-						if (coral.io.ends_with(builtin, "mport")) {
-							break: parse .import;
-						}
-					},
-
-					'p' => {
-						if (coral.io.ends_with(builtin, "rint")) {
-							break: parse .print;
-						}
-					},
-
-					else => {},
-				}
-
-				return self.report("unknown builtin");
+				break: parse .{.builtin = builtin};
 			},
 
 			.symbol_brace_left => {