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Add AST generation stage to Kym parser
continuous-integration/drone/push Build is failing Details

This commit is contained in:
kayomn 2023-05-28 01:19:46 +00:00
parent bb8cb43843
commit 5642f399b9
12 changed files with 1171 additions and 1094 deletions
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32
source/coral/io.zig
View File

@ -47,11 +47,7 @@ pub fn Functor(comptime Output: type, comptime Input: type) type {
};
}
pub const ReadError = error {
IoUnavailable,
};
pub const Reader = Functor(ReadError!usize, []u8);
pub const Reader = Functor(?usize, []u8);
pub fn Tag(comptime Element: type) type {
return switch (@typeInfo(Element)) {
@ -66,7 +62,7 @@ pub const WritableMemory = struct {
pub fn as_writer(self: *WritableMemory) Writer {
return Writer.bind(self, struct {
fn write(writable_memory: *WritableMemory, data: []const u8) WriteError!usize {
fn write(writable_memory: *WritableMemory, data: []const u8) ?usize {
return writable_memory.write(data);
}
}.write);
@ -94,11 +90,7 @@ pub const WritableMemory = struct {
}
};
pub const WriteError = error{
IoUnavailable,
};
pub const Writer = Functor(WriteError!usize, []const u8);
pub const Writer = Functor(?usize, []const u8);
pub fn allocate_many(comptime Type: type, amount: usize, allocator: Allocator) AllocationError![]Type {
if (@sizeOf(Type) == 0) {
@ -114,14 +106,20 @@ pub fn allocate_many(comptime Type: type, amount: usize, allocator: Allocator) A
}))[0 .. amount];
}
pub fn allocate_one(comptime Type: type, allocator: Allocator) AllocationError!*Type {
pub fn allocate_one(allocator: Allocator, value: anytype) AllocationError!*@TypeOf(value) {
const Type = @TypeOf(value);
if (@sizeOf(Type) == 0) {
@compileError("Cannot allocate memory for 0-byte type " ++ @typeName(Type));
}
return @ptrCast(*Type, @alignCast(@alignOf(Type), allocator.invoke(.{.size = @sizeOf(Type)}) orelse {
const allocation = @ptrCast(*Type, @alignCast(@alignOf(Type), allocator.invoke(.{.size = @sizeOf(Type)}) orelse {
return error.OutOfMemory;
}));
allocation.* = value;
return allocation;
}
pub fn bytes_of(value: anytype) []const u8 {
@ -256,13 +254,13 @@ pub fn sentinel_index(comptime element: type, comptime sentinel: element, sequen
return index;
}
pub fn stream(output: Writer, input: Reader, buffer: []u8) (ReadError || WriteError)!u64 {
pub fn stream(output: Writer, input: Reader, buffer: []u8) ?u64 {
var total_written: u64 = 0;
var read = try input.invoke(buffer);
var read = input.invoke(buffer) orelse return null;
while (read != 0) {
total_written += try output.invoke(buffer[0..read]);
read = try input.invoke(buffer);
total_written += output.invoke(buffer[0..read]) orelse return null;
read = input.invoke(buffer) orelse return null;
}
return total_written;

173
source/coral/list.zig
View File

@ -5,13 +5,16 @@ const io = @import("./io.zig");
const math = @import("./math.zig");
///
/// Returns a dynamically sized stack capable of holding `Element`.
/// Returns a dynamically sized stack capable of holding `Value`.
///
pub fn Stack(comptime Element: type) type {
pub fn Stack(comptime Value: type) type {
return struct {
capacity: usize,
values: []Element,
values: []Value,
///
/// Stack type.
///
const Self = @This();
///
@ -38,11 +41,13 @@ pub fn Stack(comptime Element: type) type {
}
///
/// Attempts to remove `amount` number of `Element`s from the stack, returning `bool` if it was successful,
/// Attempts to remove `amount` number of `Value`s from the stack, returning `bool` if it was successful,
/// otherwise `false` if the stack contains fewer elements than `amount`.
///
pub fn drop(self: *Self, amount: usize) bool {
if (amount > self.values.len) return false;
if (amount > self.values.len) {
return false;
}
self.values = self.values[0 .. self.values.len - amount];
@ -52,7 +57,7 @@ pub fn Stack(comptime Element: type) type {
///
/// Attempts to grow the internal buffer of `self` by `growth_amount` using `allocator`.
///
/// The function returns [AllocatorError] instead if `allocator` cannot commit the memory required to grow the
/// The function returns [io.AllocatorError] if `allocator` could not commit the memory required to grow the
/// internal buffer by `growth_amount`, leaving `self` in the same state that it was in prior to starting the
/// grow.
///
@ -64,17 +69,13 @@ pub fn Stack(comptime Element: type) type {
///
pub fn grow(self: *Self, allocator: io.Allocator, growth_amount: usize) io.AllocationError!void {
const grown_capacity = self.capacity + growth_amount;
const values = (try io.allocate_many(Element, grown_capacity, allocator))[0 .. self.values.len];
const values = (try io.allocate_many(Value, grown_capacity, allocator))[0 .. self.values.len];
errdefer io.deallocate(allocator, values);
{
var index: usize = 0;
while (index < self.values.len) {
for (0 .. self.values.len) |index| {
values[index] = self.values[index];
}
}
io.deallocate(allocator, self.values);
@ -86,11 +87,11 @@ pub fn Stack(comptime Element: type) type {
/// Attempts to allocate and return an empty stack with an internal buffer of `initial_capacity` size using
/// `allocator` as the memory allocation strategy.
///
/// The function returns [AllocationError] instead if `allocator` cannot commit the memory required for an
/// The function returns [io.AllocationError] if `allocator` could not commit the memory required for an
/// internal buffer of `initial_capacity` size.
///
pub fn init(allocator: io.Allocator, initial_capacity: usize) !Self {
const values = try io.allocate_many(Element, initial_capacity, allocator);
const values = try io.allocate_many(Value, initial_capacity, allocator);
errdefer io.deallocate(values);
@ -101,16 +102,32 @@ pub fn Stack(comptime Element: type) type {
}
///
/// Attempts to push every `Element` in `values` to `self` using `allocator` to grow the internal buffer as
/// Attempts to remove the last element of `self` that was inserted, if one exists, returning it or `null` if
/// `self` is empty.
///
pub fn pop(self: *Self) ?Value {
if (self.values.len == 0) {
return null;
}
const last_index = self.values.len - 1;
defer self.values = self.values[0 .. last_index];
return self.values[last_index];
}
///
/// Attempts to push every `Value` in `values` to `self` using `allocator` to grow the internal buffer as
/// necessary.
///
/// The function returns [AllocationError] instead if `allocator` cannot commit the memory required to grow the
/// The function returns [io.AllocationError] if `allocator` could not commit the memory required to grow the
/// internal buffer of `self` when necessary.
///
/// *Note* `allocator` must reference the same allocation strategy as the one originally used to initialize
/// `self`.
///
pub fn push_all(self: *Self, allocator: io.Allocator, values: []const Element) io.AllocationError!void {
pub fn push_all(self: *Self, allocator: io.Allocator, values: []const Value) io.AllocationError!void {
const new_length = self.values.len + values.len;
if (new_length >= self.capacity) {
@ -121,24 +138,22 @@ pub fn Stack(comptime Element: type) type {
self.values = self.values.ptr[0 .. new_length];
{
var index: usize = 0;
while (index < values.len) : (index += 1) self.values[offset_index + index] = values[index];
for (0 .. values.len) |index| {
self.values[offset_index + index] = values[index];
}
}
///
/// Attempts to push the `Element` in `value` to `self` by `amount` number of times using `allocator` to grow
/// Attempts to push the `Value` in `value` to `self` by `amount` number of times using `allocator` to grow
/// the internal buffer as necessary.
///
/// The function returns [AllocationError] instead if `allocator` cannot commit the memory required to grow the
/// The function returns [io.AllocationError] if `allocator` could not commit the memory required to grow the
/// internal buffer of `self` when necessary.
///
/// *Note* `allocator` must reference the same allocation strategy as the one originally used to initialize
/// `self`.
///
pub fn push_many(self: *Self, allocator: io.Allocator, value: Element, amount: usize) io.AllocationError!void {
pub fn push_many(self: *Self, allocator: io.Allocator, value: Value, amount: usize) io.AllocationError!void {
const new_length = self.values.len + amount;
if (new_length >= self.capacity) {
@ -149,24 +164,22 @@ pub fn Stack(comptime Element: type) type {
self.values = self.values.ptr[0 .. new_length];
{
var index: usize = 0;
while (index < amount) : (index += 1) self.values[offset_index + index] = value;
for (0 .. amount) |index| {
self.values[offset_index + index] = value;
}
}
///
/// Attempts to push the `Element` in `value` to `self` using `allocator` to grow the internal buffer as
/// Attempts to push the `Value` in `value` to `self` using `allocator` to grow the internal buffer as
/// necessary.
///
/// The function returns [AllocationError] instead if `allocator` cannot commit the memory required to grow the
/// The function returns [io.AllocationError] if `allocator` could not commit the memory required to grow the
/// internal buffer of `self` when necessary.
///
/// *Note* `allocator` must reference the same allocation strategy as the one originally used to initialize
/// `self`.
///
pub fn push_one(self: *Self, allocator: io.Allocator, value: Element) io.AllocationError!void {
pub fn push_one(self: *Self, allocator: io.Allocator, value: Value) io.AllocationError!void {
if (self.values.len == self.capacity) {
try self.grow(allocator, math.max(1, self.capacity));
}
@ -181,45 +194,71 @@ pub fn Stack(comptime Element: type) type {
}
///
/// Binds `stack` to a [io.Allocator], returning it.
/// Generic, byte-writable interface for all list types supported by the module.
///
pub fn stack_as_allocator(stack: *Stack(u8)) io.Allocator {
return io.Allocator.bind(stack, struct {
pub fn reallocate(writable_stack: *Stack(u8), existing_allocation: ?[*]u8, allocation_size: usize) ?[*]u8 {
if (allocation_size == 0) return null;
writable_stack.push_all(io.bytes_of(&allocation_size)) catch return null;
const usize_size = @sizeOf(usize);
errdefer debug.assert(writable_stack.drop(usize_size));
const allocation_index = writable_stack.values.len;
if (existing_allocation) |allocation| {
const existing_allocation_size = @intToPtr(*const usize, @ptrToInt(allocation) - usize_size).*;
writable_stack.push_all(allocation[0 .. existing_allocation_size]) catch return null;
} else {
writable_stack.push_many(0, allocation_size) catch return null;
}
return @ptrCast([*]u8, &writable_stack.values[allocation_index]);
}
});
}
/// As the type is only a thin wrapper around other resources, it does not manage any memory nor is it permitted to
/// outlive the resources it references.
///
/// Binds `stack` to a [io.Writer], returning it.
///
pub fn stack_as_writer(stack: *Stack(u8)) io.Writer {
return io.Writer.bind(stack, struct {
pub fn write(writable_stack: *Stack(u8), buffer: []const u8) io.WriteError!usize {
writable_stack.push_all(buffer) catch |grow_error| switch (grow_error) {
error.OutOfMemory => return error.IoUnavailable,
pub const Writable = struct {
allocator: io.Allocator,
list: union (enum) {
stack: *ByteStack,
},
///
/// Stack of bytes.
///
const ByteStack = Stack(u8);
///
/// Binds and returns `self` as a [io.Writer].
///
pub fn as_writer(self: *Writable) io.Writer {
return io.Writer.bind(Writable, self, struct {
fn write(writable: *Writable, buffer: []const u8) ?usize {
writable.write(buffer) catch |allocation_error| switch (allocation_error) {
error.OutOfMemory => return null,
};
return buffer.len;
}
});
}
}.write);
}
///
/// Returns a new [Writable] from wrapping `stack` and `allocator`.
///
/// *Note* `allocator` must reference the same allocation strategy as the one originally used to initialize `stack`.
///
pub fn from_stack(allocator: io.Allocator, stack: *ByteStack) Writable {
return .{
.allocator = allocator,
.list = .{.stack = stack},
};
}
///
/// Attempts to write the singular `byte` to the list referenced by `self`.
///
/// The function returns [io.AllocationError] if `allocator` could not commit the memory required by the internal
/// list.
///
pub fn put(self: *Writable, byte: u8) io.AllocationError!void {
try switch (self.list) {
.stack => |stack| stack.push_one(self.allocator, byte),
};
}
///
/// Attempst to write all of `bytes` to the list referenced by `self`.
///
/// The function returns [io.AllocationError] if `allocator` could not commit the memory required by the internal
/// list.
///
pub fn write(self: *Writable, bytes: []const u8) io.AllocationError!void {
try switch (self.list) {
.stack => |stack| stack.push_all(self.allocator, bytes),
};
}
};

40
source/coral/math.zig
View File

@ -7,22 +7,18 @@ pub const CheckedArithmeticError = error {
IntOverflow,
};
pub fn Float(comptime bits: comptime_int) type {
return @Type(.{.Float = .{.bits = bits}});
///
/// Returns the float type described by `float`.
///
pub fn Float(comptime float: std.builtin.Type.Float) type {
return @Type(.{.Float = float});
}
pub fn Signed(comptime bits: comptime_int) type {
return @Type(.{.Int = .{
.signedness = .signed,
.bits = bits,
}});
}
pub fn Unsigned(comptime bits: comptime_int) type {
return @Type(.{.Int = .{
.signedness = .unsigned,
.bits = bits,
}});
///
/// Returns the integer type described by `int`.
///
pub fn Int(comptime int: std.builtin.Type.Int) type {
return @Type(.{.Int = int});
}
///
@ -56,24 +52,18 @@ pub fn checked_add(a: anytype, b: anytype) CheckedArithmeticError!@TypeOf(a + b)
}
///
/// Attempts to perform a checked integer cast to `Int` on `value`, returning the result or [CheckedArithmeticError] if
/// the operation tried to invoke safety-checked behavior.
/// Attempts to perform a checked integer cast to the type expressed by `int` on `value`, returning the result or
/// [CheckedArithmeticError] if the operation tried to invoke safety-checked behavior.
///
/// `checked_cast` can be seen as an alternative to the language-native `@intCast` builtin that exposes the safety-
/// checked behavior in the form of an error type that may be caught or tried on.
///
pub fn checked_cast(comptime Int: type, value: anytype) CheckedArithmeticError!Int {
const int_type_info = @typeInfo(Int);
if (int_type_info != .Int) {
@compileError("`Int` must be of type int");
}
if ((value < min_int(int_type_info.Int)) or (value > max_int(int_type_info.Int))) {
pub fn checked_cast(comptime int: std.builtin.Type.Int, value: anytype) CheckedArithmeticError!Int(int) {
if ((value < min_int(int)) or (value > max_int(int))) {
return error.IntOverflow;
}
return @intCast(Int, value);
return @intCast(Int(int), value);
}
///

147
source/coral/utf8.zig
View File

@ -1,29 +1,63 @@
const std = @import("std");
const io = @import("./io.zig");
const math = @import("./math.zig");
///
/// Errors that may occur during utf8-encoded int parsing.
///
pub const IntParseError = math.CheckedArithmeticError || ParseError;
///
/// Optional rules for int parsing logic to consider during parsing.
///
pub const IntParseOptions = struct {
delimiter: []const u8 = "",
};
///
/// Errors that may occur during any kind of utf8-encoded parsing.
///
pub const ParseError = error {
BadSyntax,
};
pub fn parse_float(comptime bits: comptime_int, utf8: []const u8) ParseError!math.Float(bits) {
///
/// Errors that may occur during any kind of utf8-encoded printing.
///
pub const PrintError = error {
PrintFailed,
PrintIncomplete,
};
///
/// Attempts to parse a float value of type described by `float` from `utf8`.
///
/// The function returns a [ParseError] if `utf8` does not conform to the syntax of a float.
///
pub fn parse_float(comptime float: std.builtin.Type.Float, utf8: []const u8) ParseError!math.Float(float) {
// ""
if (utf8.len == 0) return error.BadSyntax;
if (utf8.len == 0) {
return error.BadSyntax;
}
const is_negative = utf8[0] == '-';
// "-"
if (is_negative and (utf8.len == 1)) return error.BadSyntax;
if (is_negative and (utf8.len == 1)) {
return error.BadSyntax;
}
const negative_offset = @boolToInt(is_negative);
var has_decimal = utf8[negative_offset] == '.';
// "-."
if (has_decimal and (utf8.len == 2)) return error.BadSyntax;
if (has_decimal and (utf8.len == 2)) {
return error.BadSyntax;
}
const Float = math.Float(bits);
const Float = math.Float(float);
var result: Float = 0;
var factor: Float = 1;
@ -46,69 +80,92 @@ pub fn parse_float(comptime bits: comptime_int, utf8: []const u8) ParseError!mat
return result * factor;
}
pub fn parse_signed(comptime bits: comptime_int, utf8: []const u8) IntParseError!math.Signed(bits) {
// ""
if (utf8.len == 0) return error.BadSyntax;
///
/// Attempts to parse an int value of type described by `int` from `utf8`, with `options` as additional rules for the
/// parsing logic to consider.
///
/// The function returns a [IntParseError] if `utf8` does not conform to the syntax of a float, does not match the rules
/// specified in `option`, or exceeds the maximum size of the int described by `int`.
///
pub fn parse_int(
comptime int: std.builtin.Type.Int,
utf8: []const u8,
options: IntParseOptions) IntParseError!math.Int(int) {
if (utf8.len == 0) {
return error.BadSyntax;
}
{
const is_negative = utf8[0] == '-';
// "-"
if (is_negative and (utf8.len == 1)) return error.BadSyntax;
switch (int.signedness) {
.signed => {
if (is_negative and utf8.len == 1) {
return error.BadSyntax;
}
},
var result: math.Signed(bits) = 0;
.unsigned => {
if (is_negative) {
return error.BadSyntax;
}
},
}
}
{
var index: usize = 0;
var result = @as(math.Int(int), 0);
while (index < utf8.len) : (index += 1) {
for (0 .. utf8.len) |index| {
const code = utf8[index];
switch (code) {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9' =>
result = try math.checked_add(try math.checked_mul(result, 10), try math.checked_sub(code, '0')),
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9' => {
result = try math.checked_add(try math.checked_mul(result, 10), try math.checked_sub(code, '0'));
},
else => return error.BadSyntax,
else => {
if (options.delimiter.len == 0 or !io.equals(options.delimiter, utf8[index ..])) {
return error.BadSyntax;
}
},
}
}
return result;
}
pub fn parse_unsigned(comptime bits: comptime_int, utf8: []const u8) IntParseError!math.Unsigned(bits) {
// ""
if (utf8.len == 0) return error.BadSyntax;
// "-..."
if (utf8[0] == '-') return error.BadSyntax;
var result: math.Unsigned(bits) = 0;
{
var index: usize = 0;
while (index < utf8.len) : (index += 1) {
const code = utf8[index];
switch (code) {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9' =>
result = try math.checked_add(try math.checked_mul(result, 10), try math.checked_sub(code, '0')),
else => return error.BadSyntax,
///
/// Attempts to print `utf8` to `writer`.
///
/// The function returns [PrintError] if the write failed to complete partially or entirely.
///
pub fn print(writer: io.Writer, utf8: []const u8) PrintError!void {
if ((writer.invoke(utf8) orelse return error.PrintFailed) != utf8.len) {
return error.PrintIncomplete;
}
}
}
return result;
}
pub fn print_unsigned(comptime bit_size: comptime_int, writer: io.Writer, value: math.Unsigned(bit_size)) io.WriteError!usize {
if (value == 0) return writer.invoke("0");
///
/// Attempts to print the int `value` described by `int` to `writer`.
///
/// The function returns [PrintError] if the write failed to complete partially or entirely.
///
pub fn print_int(comptime int: std.builtin.Type.Int, writer: io.Writer, value: math.Int(int)) PrintError!void {
if (value == 0) {
return try print(writer, "0");
}
var buffer = [_]u8{0} ** 39;
// TODO: Don't make this buffer arbitrarily size cause big int types WILL overflow.
var buffer = [_]u8{0} ** 40;
var buffer_count: usize = 0;
var split_value = value;
if ((int.signedness == .unsigned) and (value < 0)) {
buffer[0] = '-';
buffer_count += 1;
}
while (split_value != 0) : (buffer_count += 1) {
const radix = 10;
@ -125,5 +182,5 @@ pub fn print_unsigned(comptime bit_size: comptime_int, writer: io.Writer, value:
}
}
return writer.invoke(buffer[0 .. buffer_count]);
try print(writer, buffer[0 .. buffer_count]);
}

44
source/ona/file.zig
View File

@ -106,13 +106,15 @@ pub const Path = extern struct {
}
};
pub const Readable = opaque {
pub const ReadError = error {
pub const ReadError = error {
FileUnavailable,
};
};
pub fn close(self: *Readable) bool {
return ext.SDL_RWclose(rw_ops_cast(self)) == 0;
pub const Readable = opaque {
pub fn close(self: *Readable) void {
if (ext.SDL_RWclose(rw_ops_cast(self)) != 0) {
@panic("Failed to close file");
}
}
pub fn read(self: *Readable, buffer: []u8) ReadError!usize {
@ -162,21 +164,47 @@ pub const Readable = opaque {
pub const System = union (enum) {
sandboxed_path: *const Path,
pub const FileInfo = struct {
size: u64,
};
pub const OpenError = Path.ValidationError || error {
FileNotFound,
};
pub const QueryError = OpenError || ReadError;
pub fn open_readable(self: System, path: Path) OpenError!*Readable {
switch (self) {
.sandboxed_path => |sandboxed_path| {
const absolute_path = sandboxed_path.joined(path);
return @ptrCast(*Readable, ext.SDL_RWFromFile(try absolute_path.to_string(), "rb") orelse {
return @ptrCast(*Readable, ext.SDL_RWFromFile(try sandboxed_path.joined(path).to_string(), "rb") orelse {
return error.FileNotFound;
});
},
}
}
pub fn query_info(self: System, path: Path) QueryError!FileInfo {
switch (self) {
.sandboxed_path => |sandboxed_path| {
const file = ext.SDL_RWFromFile(try sandboxed_path.joined(path).to_string(), "rb") orelse {
return error.FileNotFound;
};
defer coral.debug.assert(ext.SDL_RWclose(file) == 0);
const file_size = ext.SDL_RWseek(file, 0, ext.RW_SEEK_END);
if (file_size < 0) {
return error.FileUnavailable;
}
return FileInfo{
.size = @intCast(u64, file_size),
};
}
}
}
};
fn rw_ops_cast(ptr: *anyopaque) *ext.SDL_RWops {

225
source/ona/kym/Chunk.zig Normal file
View File

@ -0,0 +1,225 @@
const Environment = @import("./Environment.zig");
const ast = @import("./ast.zig");
const coral = @import("coral");
const types = @import("./types.zig");
const tokens = @import("./tokens.zig");
env: *Environment,
message_name_len: usize,
message_buffer: Buffer,
bytecode_buffer: Buffer,
const Buffer = coral.list.Stack(u8);
const Opcode = enum (u8) {
ret,
push_nil,
push_true,
push_false,
push_zero,
push_integer,
push_float,
push_object,
push_table,
not,
neg,
add,
sub,
mul,
div,
};
const Self = @This();
fn clear_error_details(self: *Self) void {
coral.debug.assert(self.message_buffer.values.len >= self.message_name_len);
coral.debug.assert(self.message_buffer.drop(self.message_buffer.values.len - self.message_name_len));
}
pub fn compile(self: *Self, data: []const u8) types.RuntimeError!void {
var tokenizer = tokens.Tokenizer{.source = data};
var parsed_statements = try ast.ParsedStatements.init(self.env.allocator, &tokenizer);
switch (parsed_statements) {
.valid => |*statements| {
defer statements.deinit(self.env.allocator);
for (statements.list.values) |statement| {
switch (statement) {
.return_expression => |return_expression| {
try self.compile_expression(return_expression);
try self.emit_opcode(.ret);
},
.return_nothing => {
try self.emit_opcode(.push_nil);
try self.emit_opcode(.ret);
},
}
}
},
.invalid => |invalid| {
self.clear_error_details();
try self.message_buffer.push_all(self.env.allocator, "@(");
var writable_message = coral.list.Writable.from_stack(self.env.allocator, &self.message_buffer);
const message_writer = writable_message.as_writer();
coral.utf8.print_int(@typeInfo(usize).Int, message_writer, tokenizer.lines_stepped) catch {
return error.OutOfMemory;
};
coral.utf8.print(message_writer, "): ") catch {
return error.OutOfMemory;
};
coral.utf8.print(message_writer, invalid) catch {
return error.OutOfMemory;
};
return error.BadSyntax;
},
}
}
pub fn compile_expression(self: *Self, expression: ast.Expression) types.RuntimeError!void {
switch (expression) {
.nil_literal => try self.emit_opcode(.push_nil),
.true_literal => try self.emit_opcode(.push_true),
.false_literal => try self.emit_opcode(.push_false),
.integer_literal => |literal| {
if (literal == 0) {
try self.emit_opcode(.push_zero);
} else {
try self.emit_opcode(.push_integer);
try self.emit_float(0);
}
},
.float_literal => |literal| {
if (literal == 0) {
try self.emit_opcode(.push_zero);
} else {
try self.emit_opcode(.push_float);
try self.emit_float(literal);
}
},
.string_literal => |literal| {
try self.emit_opcode(.push_object);
try self.emit_object(try self.intern(literal));
},
.table_literal => |literal| {
if (literal.values.len > coral.math.max_int(@typeInfo(types.Integer).Int)) {
return error.OutOfMemory;
}
for (literal.values) |field| {
try self.compile_expression(field.expression.*);
try self.emit_opcode(.push_object);
try self.emit_object(try self.intern(field.identifier));
}
try self.emit_opcode(.push_table);
try self.emit_integer(@intCast(types.Integer, literal.values.len));
},
.binary_operation => |operation| {
try self.compile_expression(operation.lhs_expression.*);
try self.compile_expression(operation.rhs_expression.*);
try self.emit_opcode(switch (operation.kind) {
.addition => .add,
.subtraction => .sub,
.multiplication => .mul,
.division => .div,
});
},
.unary_operation => |operation| {
try self.compile_expression(operation.expression.*);
try self.emit_opcode(switch (operation.kind) {
.boolean_negation => .not,
.numeric_negation => .neg,
});
},
.grouped_expression => |grouped_expression| {
try self.compile_expression(grouped_expression.*);
}
}
}
pub fn deinit(self: *Self) void {
self.bytecode_buffer.deinit(self.env.allocator);
self.message_buffer.deinit(self.env.allocator);
self.message_name_len = 0;
}
pub fn emit_float(self: *Self, float: types.Float) coral.io.AllocationError!void {
try self.bytecode_buffer.push_all(self.env.allocator, coral.io.bytes_of(&float));
}
pub fn emit_integer(self: *Self, integer: types.Integer) coral.io.AllocationError!void {
try self.bytecode_buffer.push_all(self.env.allocator, coral.io.bytes_of(&integer));
}
pub fn emit_object(self: *Self, object: types.Object) coral.io.AllocationError!void {
try self.bytecode_buffer.push_all(self.env.allocator, coral.io.bytes_of(&object));
}
pub fn emit_opcode(self: *Self, opcode: Opcode) coral.io.AllocationError!void {
try self.bytecode_buffer.push_one(self.env.allocator, @enumToInt(opcode));
}
pub fn error_details(self: Self) []const u8 {
coral.debug.assert(self.message_buffer.values.len >= self.message_name_len);
return self.message_buffer.values[self.message_name_len .. ];
}
pub fn init(env: *Environment, chunk_name: []const u8) coral.io.AllocationError!Self {
var bytecode_buffer = try Buffer.init(env.allocator, 0);
errdefer bytecode_buffer.deinit(env.allocator);
var message_buffer = try Buffer.init(env.allocator, chunk_name.len);
errdefer message_buffer.deinit(env.allocator);
message_buffer.push_all(env.allocator, chunk_name) catch unreachable;
return Self{
.env = env,
.message_buffer = message_buffer,
.bytecode_buffer = bytecode_buffer,
.message_name_len = chunk_name.len,
};
}
pub fn intern(self: *Self, string: []const u8) coral.io.AllocationError!types.Object {
const interned_string = try self.env.intern(string);
coral.debug.assert(interned_string == .object);
return interned_string.object;
}
pub fn name(self: Self) []const u8 {
coral.debug.assert(self.message_buffer.values.len >= self.message_name_len);
return self.message_buffer.values[0 .. self.message_name_len];
}

54
source/ona/kym/Environment.zig
View File

@ -1,13 +1,13 @@
const bytecode = @import("./bytecode.zig");
const Chunk = @import("./Chunk.zig");
const coral = @import("coral");
const file = @import("../file.zig");
const tokens = @import("./tokens.zig");
const types = @import("./types.zig");
const tokens = @import("./tokens.zig");
allocator: coral.io.Allocator,
heap: ObjectSlab,
global_object: types.Object,
@ -21,7 +21,12 @@ const CallStack = coral.list.Stack(struct {
slots: []types.Val,
});
pub const ExecuteFileError = file.System.OpenError || file.Readable.ReadError || types.CompileError;
pub const DataSource = struct {
name: []const u8,
data: []const u8,
};
pub const ExecuteFileError = file.System.OpenError || file.ReadError || types.CompileError;
pub const InitOptions = struct {
values_max: u32,
@ -196,46 +201,51 @@ pub fn discard(self: *Self, val: types.Val) void {
}
}
pub fn execute_file(self: *Self, allocator: coral.io.Allocator, fs: file.System, file_path: file.Path) ExecuteFileError!types.Val {
pub fn execute_data(self: *Self, source: DataSource) ExecuteFileError!types.Val {
const typeid = "<chunk>";
const Behaviors = struct {
fn deinitialize(context: ObjectInfo.DeinitializeContext) void {
(context.env.native_cast(context.obj, typeid, bytecode.Chunk) catch unreachable).deinit();
(context.env.native_cast(context.obj, typeid, Chunk) catch unreachable).deinit();
}
};
var chunk = try bytecode.Chunk.init(allocator, self, try file_path.to_string());
var chunk = try Chunk.init(self, source.name);
errdefer chunk.deinit();
{
const readable_file = try fs.open_readable(file_path);
chunk.compile(source.data) catch |compile_error| {
self.reporter.invoke(chunk.error_details());
defer if (!readable_file.close()) {
@panic("Failed to close script file");
return compile_error;
};
var file_contents = try file.Contents.init(allocator, readable_file);
defer file_contents.deinit();
var tokenizer = tokens.Tokenizer{.source = file_contents.data};
try chunk.parse(self, &tokenizer);
}
const script = try self.new_object(coral.io.bytes_of(&chunk), .{
.identity = typeid,
.deinitializer = Behaviors.deinitialize,
});
self.discard(script);
defer self.discard(script);
return try self.call(script.as_ref(), null, &.{});
}
pub fn fail(self: *Self, failure_message: []const u8) error { CheckFailed } {
pub fn execute_file(self: *Self, fs: file.System, file_path: file.Path) ExecuteFileError!types.Val {
const readable_file = try fs.open_readable(file_path);
defer readable_file.close();
var file_source = try coral.list.Stack(u8).init(self.allocator, (try fs.query_info(file_path)).size);
defer file_source.deinit(self.allocator);
return try self.execute_data(.{
.name = try file_path.to_string(),
.data = file_source.values,
});
}
pub fn fail(self: *Self, failure_message: []const u8) types.CheckError {
self.reporter.invoke(failure_message);
return error.CheckFailed;

430
source/ona/kym/ast.zig Normal file
View File

@ -0,0 +1,430 @@
const coral = @import("coral");
const tokens = @import("./tokens.zig");
const types = @import("./types.zig");
pub const BinaryOperation = enum {
addition,
subtraction,
multiplication,
division
};
pub const ParsedExpression = union (enum) {
valid: Expression,
invalid: []const u8,
pub fn init(allocator: coral.io.Allocator, tokenizer: *tokens.Tokenizer) coral.io.AllocationError!ParsedExpression {
var parsed_term_expression = try init_term(allocator, tokenizer);
switch (parsed_term_expression) {
.valid => |*term_expression| {
var expression = term_expression.*;
var is_invalid = true;
defer if (is_invalid) {
expression.deinit(allocator);
};
if (tokenizer.current_token == .symbol_plus) {
if (!tokenizer.step()) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `+`"};
}
var parsed_binary_expression = try init_binary(allocator, tokenizer, &expression, .addition);
expression = switch (parsed_binary_expression) {
.valid => |binary_expression| binary_expression,
.invalid => |details| return ParsedExpression{.invalid = details},
};
}
if (tokenizer.current_token == .symbol_minus) {
if (!tokenizer.step()) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `-`"};
}
var parsed_binary_expression = try init_binary(allocator, tokenizer, &expression, .subtraction);
expression = switch (parsed_binary_expression) {
.valid => |binary_expression| binary_expression,
.invalid => |details| return ParsedExpression{.invalid = details},
};
}
is_invalid = false;
return ParsedExpression{.valid = expression};
},
.invalid => |details| {
return ParsedExpression{.invalid = details};
},
}
}
fn init_binary(allocator: coral.io.Allocator, tokenizer: *tokens.Tokenizer, lhs_expression: *const Expression, operation: BinaryOperation) coral.io.AllocationError!ParsedExpression {
var parsed_expression = try init_term(allocator, tokenizer);
switch (parsed_expression) {
.valid => |*expression| {
errdefer expression.deinit(allocator);
const rhs_expression = try coral.io.allocate_one(allocator, expression.*);
errdefer coral.io.deallocate(allocator, rhs_expression);
return ParsedExpression{
.valid = .{
.binary_operation = .{
.kind = operation,
.lhs_expression = try coral.io.allocate_one(allocator, lhs_expression.*),
.rhs_expression = rhs_expression,
},
},
};
},
.invalid => |details| {
return ParsedExpression{.invalid = details};
},
}
}
fn init_factor(allocator: coral.io.Allocator, tokenizer: *tokens.Tokenizer) coral.io.AllocationError!ParsedExpression {
switch (tokenizer.current_token) {
.symbol_paren_left => {
if (!tokenizer.step()) {
return ParsedExpression{.invalid = "expected an expression after `(`"};
}
var parsed_expression = try ParsedExpression.init(allocator, tokenizer);
switch (parsed_expression) {
.valid => |*expression| {
var is_invalid = true;
defer if (is_invalid) {
expression.deinit(allocator);
};
if ((!tokenizer.step()) or (tokenizer.current_token != .symbol_paren_right)) {
return ParsedExpression{.invalid = "expected a closing `)` after expression"};
}
is_invalid = false;
return ParsedExpression{
.valid = .{.grouped_expression = try coral.io.allocate_one(allocator, expression.*)},
};
},
.invalid => |details| {
return ParsedExpression{.invalid = details};
}
}
},
.integer => |value| {
defer _ = tokenizer.step();
return ParsedExpression{
.valid = .{
.integer_literal = coral.utf8.parse_int(
@typeInfo(types.Integer).Int,
value, .{}) catch |parse_error| {
return ParsedExpression{
.invalid = switch (parse_error) {
error.BadSyntax => "invalid integer literal",
error.IntOverflow => "integer literal is too big",
}
};
},
},
};
},
.real => |value| {
defer _ = tokenizer.step();
return ParsedExpression{
.valid = .{
.float_literal = coral.utf8.parse_float(
@typeInfo(types.Float).Float,
value) catch |parse_error| {
return ParsedExpression{
.invalid = switch (parse_error) {
error.BadSyntax => "invalid float literal",
},
};
},
},
};
},
.string => |value| {
defer _ = tokenizer.step();
return ParsedExpression{
.valid = .{
.string_literal = value,
},
};
},
.symbol_minus => {
if (!tokenizer.step()) {
return ParsedExpression{.invalid = "expected expression after numeric negation (`-`)"};
}
return try init_unary(allocator, tokenizer, .numeric_negation);
},
.symbol_bang => {
if (!tokenizer.step()) {
return ParsedExpression{.invalid = "expected expression after boolean negation (`!`)"};
}
return try init_unary(allocator, tokenizer, .boolean_negation);
},
else => return ParsedExpression{.invalid = "unexpected token in expression"},
}
}
fn init_term(allocator: coral.io.Allocator, tokenizer: *tokens.Tokenizer) coral.io.AllocationError!ParsedExpression {
var parsed_factor_expression = try init_factor(allocator, tokenizer);
switch (parsed_factor_expression) {
.valid => |*factor_expression| {
var expression = factor_expression.*;
var is_invalid = true;
defer if (is_invalid) {
expression.deinit(allocator);
};
if (tokenizer.current_token == .symbol_asterisk) {
if (!tokenizer.step()) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `*`"};
}
var parsed_binary_expression = try init_binary(allocator, tokenizer, &expression, .multiplication);
expression = switch (parsed_binary_expression) {
.valid => |binary_expression| binary_expression,
.invalid => |details| return ParsedExpression{.invalid = details},
};
}
if (tokenizer.current_token == .symbol_forward_slash) {
if (!tokenizer.step()) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `/`"};
}
var parsed_binary_expression = try init_binary(allocator, tokenizer, &expression, .division);
expression = switch (parsed_binary_expression) {
.valid => |binary_expression| binary_expression,
.invalid => |details| return ParsedExpression{.invalid = details},
};
}
is_invalid = false;
return ParsedExpression{.valid = expression};
},
.invalid => |details| {
return ParsedExpression{.invalid = details};
},
}
}
fn init_unary(allocator: coral.io.Allocator, tokenizer: *tokens.Tokenizer, operation: UnaryOperation) coral.io.AllocationError!ParsedExpression {
var parsed_factor_expression = try init_factor(allocator, tokenizer);
switch (parsed_factor_expression) {
.valid => |*factor_expression| {
errdefer factor_expression.deinit(allocator);
return ParsedExpression{
.valid = .{
.unary_operation = .{
.kind = operation,
.expression = try coral.io.allocate_one(allocator, factor_expression.*),
},
},
};
},
.invalid => |details| {
return ParsedExpression{.invalid = details};
},
}
}
};
pub const ParsedStatements = union (enum) {
valid: Statements,
invalid: []const u8,
pub fn init(allocator: coral.io.Allocator, tokenizer: *tokens.Tokenizer) coral.io.AllocationError!ParsedStatements {
var statements_list = try Statements.List.init(allocator, 0);
var has_returned = false;
var is_invalid = true;
defer if (is_invalid) {
for (statements_list.values) |*statement| {
statement.deinit(allocator);
}
statements_list.deinit(allocator);
};
while (tokenizer.step()) {
switch (tokenizer.current_token) {
.newline => {},
.keyword_return => {
if (has_returned) {
return ParsedStatements{.invalid = "cannot return more than once per function scope"};
}
if (tokenizer.step() and (tokenizer.current_token != .newline)) {
var parsed_expression = try ParsedExpression.init(allocator, tokenizer);
switch (parsed_expression) {
.valid => |*expression| {
errdefer expression.deinit(allocator);
try statements_list.push_one(allocator, .{
.return_expression = expression.*,
});
},
.invalid => |details| {
return ParsedStatements{.invalid = details};
},
}
} else {
try statements_list.push_one(allocator, .return_nothing);
}
if (tokenizer.step() and tokenizer.current_token != .newline) {
return ParsedStatements{.invalid = "expected newline after expression"};
}
has_returned = true;
},
else => {
return ParsedStatements{.invalid = "invalid statement"};
},
}
}
is_invalid = false;
return ParsedStatements{
.valid = .{
.list = statements_list,
},
};
}
};
pub const Expression = union (enum) {
nil_literal,
true_literal,
false_literal,
integer_literal: types.Integer,
float_literal: types.Float,
string_literal: []const u8,
table_literal: TableLiteral,
grouped_expression: *Expression,
binary_operation: struct {
kind: BinaryOperation,
lhs_expression: *Expression,
rhs_expression: *Expression,
},
unary_operation: struct {
kind: UnaryOperation,
expression: *Expression,
},
const TableLiteral = coral.list.Stack(struct {
identifier: []const u8,
expression: *Expression,
});
fn deinit(self: *Expression, allocator: coral.io.Allocator) void {
switch (self.*) {
.nil_literal, .true_literal, .false_literal, .integer_literal, .float_literal, .string_literal => {},
.table_literal => |*literal| {
for (literal.values) |field| {
field.expression.deinit(allocator);
coral.io.deallocate(allocator, field.expression);
}
literal.deinit(allocator);
},
.grouped_expression => |expression| {
expression.deinit(allocator);
},
.binary_operation => |operation| {
operation.lhs_expression.deinit(allocator);
coral.io.deallocate(allocator, operation.lhs_expression);
operation.rhs_expression.deinit(allocator);
coral.io.deallocate(allocator, operation.rhs_expression);
},
.unary_operation => |operation| {
operation.expression.deinit(allocator);
coral.io.deallocate(allocator, operation.expression);
}
}
}
};
pub const Statements = struct {
list: List,
const List = coral.list.Stack(union (enum) {
return_expression: Expression,
return_nothing,
const Self = @This();
fn deinit(self: *Self, allocator: coral.io.Allocator) void {
switch (self.*) {
.return_expression => |*expression| {
expression.deinit(allocator);
},
.return_nothing => {},
}
}
});
pub fn deinit(self: *Statements, allocator: coral.io.Allocator) void {
for (self.list.values) |*statement| {
statement.deinit(allocator);
}
self.list.deinit(allocator);
}
};
pub const UnaryOperation = enum {
boolean_negation,
numeric_negation,
};

779
source/ona/kym/bytecode.zig
View File

@ -1,779 +0,0 @@
const Environment = @import("./Environment.zig");
const coral = @import("coral");
const tokens = @import("./tokens.zig");
const types = @import("./types.zig");
pub const Chunk = struct {
env: *Environment,
allocator: coral.io.Allocator,
arity: usize,
name: []u8,
bytecodes: Buffer,
objects: Objects,
const Buffer = coral.list.Stack(u8);
const Objects = coral.list.Stack(types.Object);
pub fn deinit(self: *Chunk) void {
for (self.objects.values) |object| {
if (!self.env.heap.fetch(object).release(self.env)) {
self.env.heap.remove(object);
}
}
coral.io.deallocate(self.allocator, self.name);
self.bytecodes.deinit(self.allocator);
self.objects.deinit(self.allocator);
}
fn emit_byte(self: *Chunk, byte: u8) coral.io.AllocationError!void {
return self.bytecodes.push_one(self.allocator, byte);
}
fn emit_closure(self: *Chunk, chunk: Chunk) coral.io.AllocationError!void {
const value = try self.env.new_object(coral.io.bytes_of(&chunk), .{
});
coral.debug.assert(value == .object);
try self.objects.push_one(self.allocator, value.object);
}
fn emit_float(self: *Chunk, value: types.Float) coral.io.AllocationError!void {
return self.bytecodes.push_all(self.allocator, coral.io.bytes_of(&value));
}
fn emit_integer(self: *Chunk, value: types.Integer) coral.io.AllocationError!void {
return self.bytecodes.push_all(self.allocator, coral.io.bytes_of(&value));
}
fn emit_opcode(self: *Chunk, opcode: Opcode) coral.io.AllocationError!void {
return self.bytecodes.push_one(self.allocator, @enumToInt(opcode));
}
fn emit_string(self: *Chunk, string: []const u8) coral.io.AllocationError!void {
const interned_string = try self.env.intern(string);
coral.debug.assert(interned_string == .object);
return try self.bytecodes.push_all(self.allocator, coral.io.bytes_of(&interned_string));
}
pub fn init(allocator: coral.io.Allocator, env: *Environment, name: []const u8) !Chunk {
const assumed_average_bytecode_size = 1024;
var bytecodes = try Buffer.init(allocator, assumed_average_bytecode_size);
errdefer bytecodes.deinit(allocator);
var objects = try Objects.init(allocator, 1);
errdefer objects.deinit(allocator);
const name_copy = try coral.io.allocate_many(u8, name.len, allocator);
errdefer coral.io.deallocate(name_copy);
coral.io.copy(name_copy, name);
return Chunk{
.allocator = allocator,
.env = env,
.name = name_copy,
.bytecodes = bytecodes,
.objects = objects,
.arity = 0,
};
}
pub fn parse(self: *Chunk, env: *Environment, script_tokenizer: *tokens.Tokenizer) types.CompileError!void {
errdefer self.reset();
self.reset();
var parser = Parser{
.env = env,
.tokenizer = script_tokenizer
};
while (true) {
parser.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return,
};
if (!(try parser.parse_statement(self))) break;
}
while (true) {
parser.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return,
};
try parser.current_token.expect(.newline);
}
}
pub fn reset(self: *Chunk) void {
self.bytecodes.clear();
}
};
pub const Opcode = enum(u8) {
pop,
push_nil,
push_true,
push_false,
push_zero,
push_integer,
push_float,
push_object,
push_table,
not,
neg,
add,
sub,
div,
mul,
call,
get_index,
set_index,
get_global,
set_global,
get_local,
set_local,
};
const Parser = struct {
env: *Environment,
tokenizer: *tokens.Tokenizer,
current_token: tokens.Token = .newline,
previous_token: tokens.Token = .newline,
locals: SmallStack(Local, .{.name = "", .depth = 0}) = .{},
const Local = struct {
name: []const u8,
depth: u16,
const empty = Local{ .name = "", .depth = 0 };
};
const Operator = enum {
not,
negate,
add,
subtract,
divide,
multiply,
const Self = @This();
fn opcode(self: Self) Opcode {
return switch (self) {
.not => .not,
.negate => .neg,
.add => .add,
.subtract => .sub,
.multiply => .mul,
.divide => .div,
};
}
fn precedence(self: Self) isize {
return switch (self) {
.not => 13,
.negate => 13,
.add => 11,
.subtract => 11,
.divide => 12,
.multiply => 12,
};
}
};
const OperatorStack = SmallStack(Operator, .not);
const StepError = error {
UnexpectedEnd,
};
fn declare_local(self: *Parser, name: []const u8) !void {
return self.locals.push(.{
.name = name,
.depth = 0,
});
}
const operator_tokens = &.{.symbol_assign, .symbol_plus,
.symbol_dash, .symbol_asterisk, .symbol_forward_slash, .symbol_paren_left, .symbol_comma};
fn parse_closure(self: *Parser, parent_chunk: *Chunk) types.CompileError!void {
var closure_chunk = try Chunk.init(self.env.allocator, self.env, switch (self.previous_token) {
.local_identifier => |identifier| identifier,
.symbol_assign, .symbol_paren_left, .symbol_comma => "<closure>",
else => return error.UnexpectedToken,
});
errdefer closure_chunk.deinit();
try self.step();
try self.current_token.expect(.symbol_paren_left);
while (true) {
try self.step();
switch (self.current_token) {
.symbol_paren_right => break,
.local_identifier => {
try self.declare_local(self.current_token.local_identifier);
try self.step();
},
else => return error.UnexpectedToken,
}
closure_chunk.arity += 1;
switch (self.current_token) {
.symbol_paren_right => break,
.symbol_comma => continue,
else => return error.UnexpectedToken,
}
}
try self.step();
try self.current_token.expect(.symbol_brace_left);
// TODO: Create new callframe.
while (true) {
try self.step();
switch (self.current_token) {
.symbol_brace_right => break,
else => if (try self.parse_statement(&closure_chunk)) continue,
}
while (true) {
self.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return,
};
switch (self.current_token) {
.newline => continue,
.symbol_brace_right => break,
else => return error.UnexpectedToken,
}
}
}
try parent_chunk.emit_opcode(.push_object);
try parent_chunk.emit_closure(closure_chunk);
}
fn parse_expression(self: *Parser, chunk: *Chunk) types.CompileError!void {
var operators = OperatorStack{};
var local_depth = @as(usize, 0);
while (true) {
switch (self.current_token) {
.keyword_nil => {
try self.previous_token.expect_any(operator_tokens);
try chunk.emit_opcode(.push_nil);
self.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return,
};
},
.keyword_true => {
try self.previous_token.expect_any(operator_tokens);
try chunk.emit_opcode(.push_true);
self.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return,
};
},
.keyword_false => {
try self.previous_token.expect_any(operator_tokens);
try chunk.emit_opcode(.push_false);
self.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return,
};
},
.integer_literal => |literal| {
try self.previous_token.expect_any(operator_tokens);
const value = coral.utf8.parse_signed(@bitSizeOf(types.Integer), literal)
catch |parse_error| switch (parse_error) {
error.BadSyntax => unreachable,
error.IntOverflow => return error.IntOverflow,
};
if (value == 0) {
try chunk.emit_opcode(.push_zero);
} else {
try chunk.emit_opcode(.push_integer);
try chunk.emit_integer(value);
}
try self.step();
},
.real_literal => |literal| {
try self.previous_token.expect_any(operator_tokens);
try chunk.emit_float(coral.utf8.parse_float(@bitSizeOf(types.Float), literal) catch |parse_error| {
switch (parse_error) {
// Already validated to be a real by the tokenizer so this cannot fail, as real syntax is a
// subset of float syntax.
error.BadSyntax => unreachable,
}
});
try self.step();
},
.string_literal => |literal| {
try self.previous_token.expect_any(operator_tokens);
try chunk.emit_opcode(.push_object);
try chunk.emit_string(literal);
try self.step();
},
.global_identifier, .local_identifier => {
try self.previous_token.expect_any(&.{.symbol_assign, .symbol_plus,
.symbol_dash, .symbol_asterisk, .symbol_forward_slash, .symbol_period});
try self.step();
},
.symbol_bang => {
try self.previous_token.expect_any(operator_tokens);
try operators.push(.not);
try self.step();
local_depth = 0;
},
.symbol_plus => {
try self.parse_operator(chunk, &operators, .add);
local_depth = 0;
},
.symbol_dash => {
try self.parse_operator(chunk, &operators, .subtract);
local_depth = 0;
},
.symbol_asterisk => {
try self.parse_operator(chunk, &operators, .multiply);
local_depth = 0;
},
.symbol_forward_slash => {
try self.parse_operator(chunk, &operators, .divide);
local_depth = 0;
},
.symbol_arrow => {
try self.parse_closure(chunk);
local_depth = 0;
},
.symbol_period => {
switch (self.previous_token) {
.global_identifier => |identifier| {
try chunk.emit_opcode(.get_global);
try chunk.emit_string(identifier);
},
.local_identifier => |identifier| {
if (local_depth == 0) {
try chunk.emit_byte(self.resolve_local(identifier) orelse {
return error.UndefinedLocal;
});
} else {
try chunk.emit_opcode(.get_index);
try chunk.emit_string(identifier);
}
},
else => return error.UnexpectedToken,
}
try self.step();
local_depth += 1;
},
.symbol_paren_left => {
switch (self.previous_token) {
.local_identifier => |identifier| {
if (local_depth == 0) {
try chunk.emit_byte(self.resolve_local(identifier) orelse {
return error.UndefinedLocal;
});
} else {
try chunk.emit_opcode(.get_index);
try chunk.emit_string(identifier);
}
},
.global_identifier => |identifier| {
try chunk.emit_opcode(.get_global);
try chunk.emit_string(identifier);
},
else => {
try self.parse_expression(chunk);
try self.previous_token.expect(.symbol_paren_right);
try self.step();
local_depth = 0;
continue;
},
}
local_depth += 1;
var argument_count = @as(types.Integer, 0);
while (true) {
try self.step();
try switch (self.current_token) {
.symbol_paren_right => break,
else => self.parse_expression(chunk),
};
argument_count += 1;
switch (self.current_token) {
.symbol_paren_right => break,
.symbol_comma => continue,
else => return error.UnexpectedToken,
}
}
try chunk.emit_opcode(.call);
try chunk.emit_integer(argument_count);
try self.step();
local_depth = 0;
},
.symbol_brace_left => {
const is_call_argument = switch (self.previous_token) {
.local_identifier, .global_identifier => true,
else => false,
};
var field_count = @as(types.Integer, 0);
while (true) {
try self.step();
switch (self.current_token) {
.newline => continue,
.local_identifier => {
// Create local copy of identifier because step() will overwrite captures.
const identifier = self.current_token.local_identifier;
try chunk.emit_opcode(.push_object);
try chunk.emit_string(identifier);
try self.step();
switch (self.current_token) {
.symbol_assign => {
try self.step();
try self.parse_expression(chunk);
field_count += 1;
},
.symbol_brace_right => {
try chunk.emit_opcode(.push_object);
try chunk.emit_string(identifier);
field_count += 1;
break;
},
.symbol_comma => {
try chunk.emit_opcode(.push_object);
try chunk.emit_string(identifier);
field_count += 1;
},
else => return error.UnexpectedToken,
}
},
.symbol_brace_right => break,
else => return error.UnexpectedToken,
}
}
try chunk.emit_opcode(.push_table);
try chunk.emit_integer(field_count);
if (is_call_argument) {
try chunk.emit_opcode(.call);
try chunk.emit_integer(1);
}
self.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return,
};
},
else => {
try self.previous_token.expect_any(&.{.keyword_nil, .keyword_true, .keyword_false, .integer_literal,
.real_literal, .string_literal, .global_identifier, .local_identifier, .symbol_brace_right,
.symbol_paren_right});
while (operators.pop()) |operator| {
try chunk.emit_opcode(operator.opcode());
}
return;
},
}
}
}
fn parse_operator(self: *Parser, chunk: *Chunk, operators: *OperatorStack, rhs_operator: Operator) types.CompileError!void {
try self.previous_token.expect_any(operator_tokens);
while (operators.pop()) |lhs_operator| {
if (rhs_operator.precedence() < lhs_operator.precedence()) break try operators.push(lhs_operator);
try chunk.emit_opcode(lhs_operator.opcode());
}
try operators.push(rhs_operator);
try self.step();
}
fn parse_statement(self: *Parser, chunk: *Chunk) types.CompileError!bool {
var local_depth = @as(usize, 0);
while (true) {
switch (self.current_token) {
.newline => self.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return true,
},
.keyword_return => {
try self.previous_token.expect(.newline);
self.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return true,
};
try self.parse_expression(chunk);
return false;
},
.local_identifier => {
try self.previous_token.expect_any(&.{.newline, .symbol_period});
try self.step();
},
.global_identifier => {
try self.previous_token.expect(.newline);
try self.step();
},
.symbol_period => switch (self.previous_token) {
.global_identifier => {
// Create local copy of identifier because step() will overwrite captures.
const identifier = self.previous_token.global_identifier;
try self.step();
try self.current_token.expect(.local_identifier);
try chunk.emit_opcode(.get_global);
try chunk.emit_string(identifier);
local_depth += 1;
},
.local_identifier => {
// Create local copy of identifier because step() will overwrite captures.
const identifier = self.previous_token.local_identifier;
try self.step();
try self.current_token.expect(.local_identifier);
if (local_depth == 0) {
try chunk.emit_byte(self.resolve_local(identifier) orelse return error.UndefinedLocal);
} else {
try chunk.emit_opcode(.get_index);
try chunk.emit_string(identifier);
}
local_depth += 1;
},
else => return error.UnexpectedToken,
},
.symbol_assign => {
try self.previous_token.expect(.local_identifier);
const identifier = self.previous_token.local_identifier;
if (local_depth == 0) {
if (self.resolve_local(identifier)) |local_slot| {
try chunk.emit_opcode(.set_local);
try chunk.emit_byte(local_slot);
} else {
try self.declare_local(identifier);
}
} else {
try chunk.emit_opcode(.set_index);
try chunk.emit_string(identifier);
}
try self.step();
try self.parse_expression(chunk);
local_depth = 0;
},
.symbol_arrow => {
try self.parse_closure(chunk);
local_depth = 0;
},
.symbol_paren_left => {
switch (self.previous_token) {
.local_identifier => |identifier| {
if (local_depth == 0) {
try chunk.emit_byte(self.resolve_local(identifier) orelse {
return error.UndefinedLocal;
});
} else {
try chunk.emit_opcode(.get_index);
try chunk.emit_string(identifier);
}
},
.global_identifier => |identifier| {
try chunk.emit_opcode(.get_global);
try chunk.emit_string(identifier);
},
else => return error.UnexpectedToken,
}
var argument_count = @as(types.Integer, 0);
while (true) {
try self.step();
try switch (self.current_token) {
.symbol_paren_right => break,
else => self.parse_expression(chunk),
};
argument_count += 1;
switch (self.current_token) {
.symbol_paren_right => break,
.symbol_comma => continue,
else => return error.UnexpectedToken,
}
}
try chunk.emit_opcode(.call);
try chunk.emit_integer(argument_count);
try chunk.emit_opcode(.pop);
self.step() catch |step_error| switch (step_error) {
error.UnexpectedEnd => return true,
};
local_depth = 0;
},
else => return error.UnexpectedToken,
}
}
}
fn resolve_local(self: *Parser, name: []const u8) ?u8 {
var count = @as(u8, self.locals.buffer.len);
while (count != 0) {
const index = count - 1;
if (coral.io.equals(name, self.locals.buffer[index].name)) return index;
count = index;
}
return null;
}
fn step(self: *Parser) StepError!void {
self.previous_token = self.current_token;
self.current_token = self.tokenizer.next() orelse return error.UnexpectedEnd;
@import("std").debug.print("{s}\n", .{self.current_token.text()});
}
};
fn SmallStack(comptime Element: type, comptime default: Element) type {
const maximum = 255;
return struct {
buffer: [maximum]Element = [_]Element{default} ** maximum,
count: u8 = 0,
const Self = @This();
fn peek(self: Self) ?Element {
if (self.count == 0) return null;
return self.buffer[self.count - 1];
}
fn pop(self: *Self) ?Element {
if (self.count == 0) return null;
self.count -= 1;
return self.buffer[self.count];
}
fn push(self: *Self, element: Element) !void {
if (self.count == maximum) return error.OutOfMemory;
self.buffer[self.count] = element;
self.count += 1;
}
};
}
const SymbolTable = coral.table.Hashed(coral.table.string_key, usize);

282
source/ona/kym/tokens.zig
View File

@ -4,12 +4,12 @@ pub const Token = union(enum) {
unknown: u8,
newline,
global_identifier: []const u8,
local_identifier: []const u8,
global: []const u8,
local: []const u8,
symbol_assign,
symbol_plus,
symbol_dash,
symbol_minus,
symbol_asterisk,
symbol_forward_slash,
symbol_paren_left,
@ -24,9 +24,9 @@ pub const Token = union(enum) {
symbol_period,
symbol_arrow,
integer_literal: []const u8,
real_literal: []const u8,
string_literal: []const u8,
integer: []const u8,
real: []const u8,
string: []const u8,
keyword_nil,
keyword_false,
@ -34,49 +34,33 @@ pub const Token = union(enum) {
keyword_return,
keyword_self,
pub const ExpectError = error {
UnexpectedToken,
};
pub fn expect(self: Token, tag: coral.io.Tag(Token)) ExpectError!void {
if (self != tag) return error.UnexpectedToken;
}
pub fn expect_any(self: Token, tags: []const coral.io.Tag(Token)) ExpectError!void {
for (tags) |tag| {
if (self == tag) return;
}
return error.UnexpectedToken;
}
pub fn text(self: Token) []const u8 {
return switch (self) {
.unknown => |unknown| @ptrCast([*]const u8, &unknown)[0 .. 1],
.newline => "newline",
.global_identifier => |identifier| identifier,
.local_identifier => |identifier| identifier,
.identifier_global => |identifier| identifier,
.identifier_local => |identifier| identifier,
.symbol_assign => "=",
.symbol_plus => "+",
.symbol_dash => "-",
.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_arrow => "=>",
.assign => "=",
.plus => "+",
.minus => "-",
.asterisk => "*",
.forward_slash => "/",
.paren_left => "(",
.paren_right => ")",
.bang => "!",
.comma => ",",
.at => "@",
.brace_left => "{",
.brace_right => "}",
.bracket_left => "[",
.bracket_right => "]",
.period => ".",
.arrow => "=>",
.integer_literal => |literal| literal,
.real_literal => |literal| literal,
.string_literal => |literal| literal,
.integer => |literal| literal,
.real => |literal| literal,
.string => |literal| literal,
.keyword_nil => "nil",
.keyword_false => "false",
@ -89,209 +73,267 @@ pub const Token = union(enum) {
pub const Tokenizer = struct {
source: []const u8,
cursor: usize = 0,
lines_stepped: usize = 1,
previous_token: Token = .newline,
current_token: Token = .newline,
pub fn has_next(self: Tokenizer) bool {
return self.cursor < self.source.len;
return self.source.len != 0;
}
pub fn next(self: *Tokenizer) ?Token {
while (self.has_next()) switch (self.source[self.cursor]) {
' ', '\t' => self.cursor += 1,
pub fn step(self: *Tokenizer) bool {
self.previous_token = self.current_token;
var cursor = @as(usize, 0);
defer self.source = self.source[cursor ..];
while (self.has_next()) switch (self.source[cursor]) {
'#' => {
cursor += 1;
while (self.has_next() and (self.source[cursor] == '\n')) {
cursor += 1;
}
},
' ', '\t' => cursor += 1,
'\n' => {
self.cursor += 1;
cursor += 1;
self.lines_stepped += 1;
self.current_token = .newline;
return .newline;
return true;
},
'0' ... '9' => {
const begin = self.cursor;
const begin = cursor;
self.cursor += 1;
cursor += 1;
while (self.has_next()) switch (self.source[self.cursor]) {
'0' ... '9' => self.cursor += 1,
while (self.has_next()) switch (self.source[cursor]) {
'0' ... '9' => cursor += 1,
'.' => {
self.cursor += 1;
cursor += 1;
while (self.has_next()) switch (self.source[self.cursor]) {
'0' ... '9' => self.cursor += 1,
while (self.has_next()) switch (self.source[cursor]) {
'0' ... '9' => cursor += 1,
else => break,
};
return Token{.real_literal = self.source[begin .. self.cursor]};
self.current_token = .{.real = self.source[begin .. cursor]};
return true;
},
else => break,
};
return Token{.integer_literal = self.source[begin .. self.cursor]};
self.current_token = .{.integer = self.source[begin .. cursor]};
return true;
},
'A' ... 'Z', 'a' ... 'z', '_' => {
const begin = self.cursor;
const begin = cursor;
self.cursor += 1;
cursor += 1;
while (self.cursor < self.source.len) switch (self.source[self.cursor]) {
'0'...'9', 'A'...'Z', 'a'...'z', '_' => self.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..self.cursor];
const identifier = self.source[begin .. cursor];
coral.debug.assert(identifier.len != 0);
switch (identifier[0]) {
'n' => if (coral.io.ends_with(identifier, "il")) return .keyword_nil,
'f' => if (coral.io.ends_with(identifier, "alse")) return .keyword_false,
't' => if (coral.io.ends_with(identifier, "rue")) return .keyword_true,
'r' => if (coral.io.ends_with(identifier, "eturn")) return .keyword_return,
's' => if (coral.io.ends_with(identifier, "elf")) return .keyword_self,
else => {},
'n' => if (coral.io.ends_with(identifier, "il")) {
self.current_token = .keyword_nil;
},
'f' => if (coral.io.ends_with(identifier, "alse")) {
self.current_token = .keyword_false;
},
't' => if (coral.io.ends_with(identifier, "rue")) {
self.current_token = .keyword_true;
},
'r' => if (coral.io.ends_with(identifier, "eturn")) {
self.current_token = .keyword_return;
},
's' => if (coral.io.ends_with(identifier, "elf")) {
self.current_token = .keyword_self;
},
else => self.current_token = .{.local = identifier},
}
return Token{.local_identifier = identifier};
return true;
},
'@' => {
self.cursor += 1;
cursor += 1;
if (self.has_next()) switch (self.source[self.cursor]) {
if (self.has_next()) switch (self.source[cursor]) {
'A'...'Z', 'a'...'z', '_' => {
const begin = self.cursor;
const begin = cursor;
self.cursor += 1;
cursor += 1;
while (self.has_next()) switch (self.source[self.cursor]) {
'0'...'9', 'A'...'Z', 'a'...'z', '_' => self.cursor += 1,
while (self.has_next()) switch (self.source[cursor]) {
'0'...'9', 'A'...'Z', 'a'...'z', '_' => cursor += 1,
else => break,
};
return Token{.global_identifier = self.source[begin..self.cursor]};
self.current_token = .{.global = self.source[begin .. cursor]};
return true;
},
'"' => {
self.cursor += 1;
cursor += 1;
const begin = self.cursor;
const begin = cursor;
self.cursor += 1;
cursor += 1;
while (self.has_next()) switch (self.source[self.cursor]) {
while (self.has_next()) switch (self.source[cursor]) {
'"' => break,
else => self.cursor += 1,
else => cursor += 1,
};
defer self.cursor += 1;
self.current_token = .{.global = self.source[begin .. cursor]};
cursor += 1;
return Token{.global_identifier = self.source[begin..self.cursor]};
return true;
},
else => {},
};
return .symbol_at;
self.current_token = .symbol_at;
return true;
},
'"' => {
self.cursor += 1;
cursor += 1;
const begin = self.cursor;
const begin = cursor;
self.cursor += 1;
cursor += 1;
while (self.has_next()) switch (self.source[self.cursor]) {
while (self.has_next()) switch (self.source[cursor]) {
'"' => break,
else => self.cursor += 1,
else => cursor += 1,
};
defer self.cursor += 1;
self.current_token = .{.string = self.source[begin .. cursor]};
cursor += 1;
return Token{.string_literal = self.source[begin..self.cursor]};
return true;
},
'{' => {
self.cursor += 1;
self.current_token = .symbol_brace_left;
cursor += 1;
return .symbol_brace_left;
return true;
},
'}' => {
self.cursor += 1;
self.current_token = .symbol_brace_right;
cursor += 1;
return .symbol_brace_right;
return true;
},
',' => {
self.cursor += 1;
self.current_token = .symbol_comma;
cursor += 1;
return .symbol_comma;
return true;
},
'!' => {
self.cursor += 1;
self.current_token = .symbol_bang;
cursor += 1;
return .symbol_bang;
return true;
},
')' => {
self.cursor += 1;
self.current_token = .symbol_paren_right;
cursor += 1;
return .symbol_paren_right;
return true;
},
'(' => {
self.cursor += 1;
self.current_token = .symbol_paren_left;
cursor += 1;
return .symbol_paren_left;
return true;
},
'/' => {
self.cursor += 1;
self.current_token = .symbol_forward_slash;
cursor += 1;
return .symbol_forward_slash;
return true;
},
'*' => {
self.cursor += 1;
self.current_token = .symbol_asterisk;
cursor += 1;
return .symbol_asterisk;
return true;
},
'-' => {
self.cursor += 1;
self.current_token = .symbol_minus;
cursor += 1;
return .symbol_dash;
return true;
},
'+' => {
self.cursor += 1;
self.current_token = .symbol_plus;
cursor += 1;
return .symbol_plus;
return true;
},
'=' => {
self.cursor += 1;
self.current_token = .symbol_assign;
cursor += 1;
return .symbol_assign;
return true;
},
'.' => {
self.cursor += 1;
self.current_token = .symbol_period;
cursor += 1;
return .symbol_period;
return true;
},
else => {
defer self.cursor += 1;
self.current_token = .{.unknown = self.source[cursor]};
cursor += 1;
return Token{.unknown = self.source[self.cursor]};
return true;
},
};
return null;
self.current_token = .newline;
return false;
}
};

41
source/ona/kym/types.zig
View File

@ -1,5 +1,9 @@
const coral = @import("coral");
pub const CheckError = error {
CheckFailed
};
pub const CompileError = coral.io.AllocationError || RuntimeError || error {
UnexpectedEnd,
UnexpectedToken,
@ -30,11 +34,42 @@ pub const Ref = union (Primitive) {
object: Object,
};
pub const RuntimeError = coral.io.AllocationError || error {
IntOverflow,
CheckFailed,
pub const RuntimeError = coral.io.AllocationError || CheckError || error {
BadSyntax,
};
pub fn SmallStack(comptime Element: type, comptime default: Element) type {
const maximum = 255;
return struct {
buffer: [maximum]Element = [_]Element{default} ** maximum,
count: u8 = 0,
const Self = @This();
fn peek(self: Self) ?Element {
if (self.count == 0) return null;
return self.buffer[self.count - 1];
}
fn pop(self: *Self) ?Element {
if (self.count == 0) return null;
self.count -= 1;
return self.buffer[self.count];
}
fn push(self: *Self, element: Element) !void {
if (self.count == maximum) return error.OutOfMemory;
self.buffer[self.count] = element;
self.count += 1;
}
};
}
pub const Val = union (Primitive) {
nil,
false,

8
source/ona/ona.zig
View File

@ -18,7 +18,7 @@ const AppManifest = struct {
height: u16 = 480,
pub fn load_script(self: *AppManifest, env: *kym.Environment, fs: file.System, file_path: []const u8) !void {
const manifest = try env.execute_file(heap.allocator, fs, file.Path.from(&.{file_path}));
const manifest = try env.execute_file(fs, file.Path.from(&.{file_path}));
defer env.discard(manifest);
@ -35,12 +35,14 @@ const AppManifest = struct {
coral.io.copy(&self.title, title_string);
}
const u16_int = @typeInfo(u16).Int;
{
const width = try env.get_field(manifest_ref, try env.intern("width"));
errdefer env.discard(width);
self.width = try coral.math.checked_cast(u16, try env.to_integer(width.as_ref()));
self.width = try coral.math.checked_cast(u16_int, try env.to_integer(width.as_ref()));
}
{
@ -48,7 +50,7 @@ const AppManifest = struct {
errdefer env.discard(height);
self.width = try coral.math.checked_cast(u16, try env.to_integer(height.as_ref()));
self.width = try coral.math.checked_cast(u16_int, try env.to_integer(height.as_ref()));
}
}
};