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Array and Table Literal Expressions for Kym #11

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kayomn merged 7 commits from array-table-literal-expressions into main 2023-06-03 16:18:22 +02:00
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16 changed files with 1077 additions and 1385 deletions
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102
source/coral/arena.zig Executable file
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@ -0,0 +1,102 @@
const debug = @import("./debug.zig");
const io = @import("./io.zig");
const list = @import("./list.zig");
const math = @import("./math.zig");
pub const Stacking = struct {
base_allocator: io.Allocator,
min_page_size: usize,
allocations: list.Stack(usize) = .{},
pages: list.Stack(Page) = .{},
const Page = struct {
buffer: []u8,
used: usize,
const Self = @This();
fn available(self: Self) usize {
return self.buffer.len - self.used;
}
};
pub fn allocate(self: *Stacking, allocation_size: usize) io.AllocationError![]u8 {
const alignment = @as(usize, 4);
const aligned_allocation_size = (allocation_size + alignment - 1) & ~(alignment - 1);
if (self.pages.values.len == 0) {
const page = try self.allocate_page(math.max(self.min_page_size, aligned_allocation_size));
page.used = allocation_size;
return page.buffer[0 .. allocation_size];
}
var page = self.current_page() orelse unreachable;
if (page.available() <= aligned_allocation_size) {
page = try self.allocate_page(math.max(self.min_page_size, aligned_allocation_size));
}
debug.assert(page.available() >= allocation_size);
defer page.used += aligned_allocation_size;
return page.buffer[page.used .. (page.used + allocation_size)];
}
fn allocate_page(self: *Stacking, page_size: usize) io.AllocationError!*Page {
var buffer = try io.allocate_many(u8, page_size, self.base_allocator);
errdefer io.deallocate(self.base_allocator, buffer);
try self.pages.push_one(self.base_allocator, .{
.buffer = buffer,
.used = 0,
});
return (self.current_page() orelse unreachable);
}
pub fn as_allocator(self: *Stacking) io.Allocator {
return io.Allocator.bind(Stacking, self, struct {
fn reallocate(stacking: *Stacking, options: io.AllocationOptions) ?[]u8 {
const allocation = options.allocation orelse {
return stacking.allocate(options.size) catch null;
};
if (allocation.len == 0) {
return null;
}
const reallocation = stacking.allocate(allocation.len) catch {
return null;
};
io.copy(reallocation, allocation);
return reallocation;
}
}.reallocate);
}
pub fn clear_allocations(self: *Stacking) void {
for (self.pages.values) |page| {
io.deallocate(self.base_allocator, page.buffer);
}
self.pages.deinit(self.base_allocator);
self.allocations.deinit(self.base_allocator);
}
fn current_page(self: Stacking) ?*Page {
if (self.pages.values.len == 0) {
return null;
}
return &self.pages.values[self.pages.values.len - 1];
}
};

10
source/coral/coral.zig
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@ -1,13 +1,13 @@
///
/// Arena-based memory allocation strategies.
///
pub const arena = @import("./arena.zig");
///
/// Debug build-only utilities and sanity-checkers.
///
pub const debug = @import("./debug.zig");
///
/// Heap memory allocation strategies.
///
pub const heap = @import("./heap.zig");
///
/// Platform-agnostic data input and output operations.
///

96
source/coral/heap.zig
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@ -1,96 +0,0 @@
const debug = @import("./debug.zig");
const io = @import("./io.zig");
const math = @import("./math.zig");
const table = @import("./table.zig");
pub const Bucketed = struct {
base_allocator: io.Allocator,
slab_table: SlabTable,
const Slab = struct {
count: usize = 0,
buffer: []u8 = &.{},
erased: []usize = &.{},
fn create(self: *Slab, allocator: io.Allocator) ?[]u8 {
if (self.count == self.erased.len) {
const buffer = io.allocate_many(allocator, u8, math.max(1, self.buffer.len * 2)) orelse return null;
errdefer io.deallocate(allocator, buffer);
const erased = io.allocate_many(allocator, usize, math.max(1, self.erased.len * 2)) orelse return null;
errdefer io.deallocate(allocator, erased);
self.buffer = buffer;
self.erased = erased;
}
return null;
}
fn destroy(self: *Slab) void {
_ = self;
}
};
const SlabTable = table.Hashed(table.unsigned_key(@bitSizeOf(usize)), *Slab);
fn acquire_slab(self: *Bucketed, slab_element_size: usize) ?*Slab {
if (slab_element_size == 0) return null;
return self.slab_table.lookup(slab_element_size) orelse create_slab: {
const allocated_slab = io.allocate_one(self.base_allocator, Slab);
errdefer io.deallocate(self.base_allocator, allocated_slab);
allocated_slab.* = .{.size = slab_element_size};
debug.assert(self.size_buckets.insert(slab_element_size, allocated_slab) catch return null);
break: create_slab allocated_slab;
};
}
pub fn as_allocator(self: *Bucketed) io.Allocator {
return io.Allocator.bind(self, reallocate);
}
pub fn deinit(self: *Bucketed) void {
var slab_iterator = SlabTable.Iterator{.table = self.slab_table};
while (slab_iterator.next()) |slab| {
slab.free(self.base_allocator);
}
self.size_buckets.free(self.base_allocator);
}
pub fn init(base_allocator: io.Allocator) io.AllocationError!Bucketed {
return Bucketed{
.base_allocator = base_allocator,
.size_buckets = &.{},
};
}
pub fn owns(self: Bucketed, memory: []const u8) bool {
return io.overlaps(memory.ptr, (self.slab_table.lookup(memory.len) orelse return false).buffer);
}
pub fn reallocate(self: *Bucketed, options: io.AllocationOptions) ?[]u8 {
const origin_slab = self.acquire_slab(options.size) orelse return null;
const existing_allocation = options.allocation orelse return origin_slab.create(self.base_allocator);
defer origin_slab.destroy(existing_allocation);
const target_slab = self.acquire_slab(existing_allocation.len) orelse return null;
const updated_allocation = target_slab.create(existing_allocation.len);
io.copy(updated_allocation, existing_allocation);
return updated_allocation;
}
};

110
source/coral/io.zig
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@ -11,12 +11,48 @@ pub const AllocationOptions = struct {
size: usize,
};
pub const Allocator = Functor(?[]u8, AllocationOptions);
pub const Allocator = Generator(?[]u8, AllocationOptions);
///
/// Function pointer coupled with a state context for providing dynamic dispatch over a given `Input` and `Output`.
/// Function pointer coupled with an immutable state context for providing dynamic dispatch over a given `Input` and
/// `Output`.
///
pub fn Functor(comptime Output: type, comptime Input: type) type {
return struct {
context: *const anyopaque,
invoker: *const fn (capture: *const anyopaque, input: Input) Output,
const Self = @This();
pub fn bind(comptime State: type, state: *const State, comptime invoker: fn (capture: *const State, input: Input) Output) Self {
return .{
.context = state,
.invoker = struct {
fn invoke_opaque(context: *const anyopaque, input: Input) Output {
const state_alignment = @alignOf(State);
if (state_alignment == 0) {
return invoker(@ptrCast(*const State, context), input);
}
return invoker(@ptrCast(*const State, @alignCast(state_alignment, context)), input);
}
}.invoke_opaque,
};
}
pub fn invoke(self: Self, input: Input) Output {
return self.invoker(self.context, input);
}
};
}
///
/// Function pointer coupled with a mutable state context for providing dynamic dispatch over a given `Input` and
/// `Output`.
///
pub fn Generator(comptime Output: type, comptime Input: type) type {
return struct {
context: *anyopaque,
invoker: *const fn (capture: *anyopaque, input: Input) Output,
@ -47,7 +83,7 @@ pub fn Functor(comptime Output: type, comptime Input: type) type {
};
}
pub const Reader = Functor(?usize, []u8);
pub const Reader = Generator(?usize, []u8);
pub const StreamError = error {
ReadFailure,
@ -66,7 +102,7 @@ pub const FixedBuffer = struct {
slice: []u8,
pub fn as_writer(self: *FixedBuffer) Writer {
return Writer.bind(self, struct {
return Writer.bind(FixedBuffer, self, struct {
fn write(writable_memory: *FixedBuffer, data: []const u8) ?usize {
return writable_memory.write(data);
}
@ -104,7 +140,7 @@ pub const GrowingBuffer = struct {
bytes: []const u8,
};
const Appender = Functor(AllocationError!void, AppendOptions);
const Appender = Generator(AllocationError!void, AppendOptions);
pub fn as_writer(self: *GrowingBuffer) Writer {
return Writer.bind(GrowingBuffer, self, struct {
@ -136,7 +172,7 @@ pub const GrowingBuffer = struct {
}
};
pub const Writer = Functor(?usize, []const u8);
pub const Writer = Generator(?usize, []const u8);
pub fn allocate_many(comptime Type: type, amount: usize, allocator: Allocator) AllocationError![]Type {
if (@sizeOf(Type) == 0) {
@ -187,46 +223,32 @@ pub fn compare(this: []const u8, that: []const u8) isize {
return @intCast(isize, this.len) - @intCast(isize, that.len);
}
pub fn deallocate(allocator: Allocator, allocation: anytype) void {
const Element = @TypeOf(allocation);
switch (@typeInfo(Element).Pointer.size) {
.One => {
debug.assert(allocator.invoke(.{
.allocation = @ptrCast([*]u8, allocation)[0 .. @sizeOf(Element)],
.size = 0
}) == null);
},
.Slice => {
debug.assert(allocator.invoke(.{
.allocation = @ptrCast([*]u8, allocation.ptr)[0 .. (@sizeOf(Element) * allocation.len)],
.size = 0
}) == null);
},
.Many, .C => @compileError("length of allocation must be known to deallocate"),
}
}
pub fn bytes_to(comptime Type: type, source_bytes: []const u8) ?Type {
const type_size = @sizeOf(Type);
if (source_bytes.len != type_size) return null;
var target_bytes = @as([type_size]u8, undefined);
copy(&target_bytes, source_bytes);
return @bitCast(Type, target_bytes);
}
pub fn copy(target: []u8, source: []const u8) void {
var index: usize = 0;
while (index < source.len) : (index += 1) target[index] = source[index];
}
pub fn deallocate(allocator: Allocator, allocation: anytype) void {
const Allocation = @TypeOf(allocation);
switch (@typeInfo(Allocation)) {
.Pointer => |allocation_pointer| {
_ = allocator.invoke(.{
.allocation = switch (allocation_pointer.size) {
.One => @ptrCast([*]u8, allocation)[0 .. @sizeOf(Allocation)],
.Slice => @ptrCast([*]u8, allocation.ptr)[0 .. (@sizeOf(Allocation) * allocation.len)],
.Many, .C => @compileError("length of allocation must be known to deallocate"),
},
.size = 0,
});
},
else => @compileError("cannot deallocate " ++ allocation),
}
}
pub fn ends_with(target: []const u8, match: []const u8) bool {
if (target.len < match.len) return false;
@ -270,10 +292,6 @@ pub const null_writer = Writer.bind(&null_context, struct {
}
}.write);
pub fn overlaps(pointer: [*]u8, memory_range: []u8) bool {
return (pointer >= memory_range.ptr) and (pointer < (memory_range.ptr + memory_range.len));
}
pub fn reallocate(allocator: Allocator, allocation: anytype, amount: usize) AllocationError![]@typeInfo(@TypeOf(allocation)).Pointer.child {
const pointer_info = @typeInfo(@TypeOf(allocation)).Pointer;
const Element = pointer_info.child;
@ -315,6 +333,10 @@ pub fn swap(comptime Element: type, this: *Element, that: *Element) void {
that.* = temp;
}
pub fn tag_of(comptime value: anytype) Tag(@TypeOf(value)) {
return @as(Tag(@TypeOf(value)), value);
}
pub fn zero(target: []u8) void {
for (target) |*t| t.* = 0;
}

53
source/coral/list.zig
View File

@ -9,8 +9,8 @@ const math = @import("./math.zig");
///
pub fn Stack(comptime Value: type) type {
return struct {
capacity: usize,
values: []Value,
capacity: usize = 0,
values: []Value = &.{},
///
/// Stack type.
@ -23,8 +23,8 @@ pub fn Stack(comptime Value: type) type {
/// The returned buffer may be used to write to the stack without needing to explicitly pass an allocator
/// context, as well decay further into a generic [io.Writer] type.
///
/// *Note* `allocator` must reference the same allocation strategy as the one originally used to initialize
/// `self`.
/// *Note* if `capacity` is a non-zero value, `allocator` must reference the same allocation strategy as the one
/// originally used to allocate the current internal buffer.
///
pub fn as_buffer(self: *Self, allocator: io.Allocator) io.GrowingBuffer {
return io.GrowingBuffer.bind(Self, allocator, self, push_all);
@ -44,12 +44,17 @@ pub fn Stack(comptime Value: type) type {
///
/// To clear all items from the stack while preserving the current internal buffer, see [clear] instead.
///
/// *Note* `allocator` must reference the same allocation strategy as the one originally used to initialize
/// `self`.
/// *Note* if the `capacity` field of `self` is a non-zero value, `allocator` must reference the same allocation
/// strategy as the one originally used to allocate the current internal buffer.
///
pub fn deinit(self: *Self, allocator: io.Allocator) void {
if (self.capacity == 0) {
return;
}
io.deallocate(allocator, self.values);
self.values = &.{};
self.capacity = 0;
}
@ -77,8 +82,8 @@ pub fn Stack(comptime Value: type) type {
/// Growing ahead of pushing operations is useful when the upper bound of pushes is well-understood, as it can
/// reduce the number of allocations required per push.
///
/// *Note* `allocator` must reference the same allocation strategy as the one originally used to initialize
/// `self`.
/// *Note* if the `capacity` field of `self` is a non-zero value, `allocator` must reference the same allocation
/// strategy as the one originally used to allocate the current internal buffer.
///
pub fn grow(self: *Self, allocator: io.Allocator, growth_amount: usize) io.AllocationError!void {
const grown_capacity = self.capacity + growth_amount;
@ -86,34 +91,18 @@ pub fn Stack(comptime Value: type) type {
errdefer io.deallocate(allocator, values);
if (self.capacity != 0) {
for (0 .. self.values.len) |index| {
values[index] = self.values[index];
}
io.deallocate(allocator, self.values);
}
self.values = values;
self.capacity = grown_capacity;
}
///
/// 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 [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(Value, initial_capacity, allocator);
errdefer io.deallocate(values);
return Self{
.capacity = initial_capacity,
.values = values[0 .. 0],
};
}
///
/// Attempts to remove the last element of `self` that was inserted, if one exists, returning it or `null` if
/// `self` is empty.
@ -137,8 +126,8 @@ pub fn Stack(comptime Value: type) type {
/// 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`.
/// *Note* if the `capacity` field of `self` is a non-zero value, `allocator` must reference the same allocation
/// strategy as the one originally used to allocate the current internal buffer.
///
pub fn push_all(self: *Self, allocator: io.Allocator, values: []const Value) io.AllocationError!void {
const new_length = self.values.len + values.len;
@ -163,8 +152,8 @@ pub fn Stack(comptime Value: type) type {
/// 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`.
/// *Note* if the `capacity` field of `self` is a non-zero value, `allocator` must reference the same allocation
/// strategy as the one originally used to allocate the current internal buffer.
///
pub fn push_many(self: *Self, allocator: io.Allocator, value: Value, amount: usize) io.AllocationError!void {
const new_length = self.values.len + amount;
@ -189,8 +178,8 @@ pub fn Stack(comptime Value: type) type {
/// 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`.
/// *Note* if the `capacity` field of `self` is a non-zero value, `allocator` must reference the same allocation
/// strategy as the one originally used to allocate the current internal buffer.
///
pub fn push_one(self: *Self, allocator: io.Allocator, value: Value) io.AllocationError!void {
if (self.values.len == self.capacity) {

15
source/coral/slab.zig
View File

@ -6,8 +6,8 @@ const io = @import("./io.zig");
pub fn Map(comptime Index: type, comptime Element: type) type {
return struct {
free_index: Index,
entries: []Entry,
free_index: Index = 0,
entries: []Entry = &.{},
const Entry = union (enum) {
free_index: usize,
@ -28,17 +28,6 @@ pub fn Map(comptime Index: type, comptime Element: type) type {
io.deallocate(allocator, self.entries);
}
pub fn init(allocator: io.Allocator) io.AllocationError!Self {
const entries = try io.allocate_many(Entry, 4, allocator);
errdefer io.deallocate(allocator, entries);
return Self{
.free_index = 0,
.entries = entries,
};
}
pub fn insert(self: *Self, allocator: io.Allocator, value: Element) io.AllocationError!Index {
_ = self;
_ = allocator;

47
source/coral/table.zig
View File

@ -22,8 +22,8 @@ pub fn Hashed(comptime Key: type, comptime Value: type, comptime keyer: Keyer(Ke
const growth_factor = 0.6;
return struct {
count: usize,
table: []?Entry,
count: usize = 0,
table: []?Entry = &.{},
///
/// Key-value pair bundling.
@ -82,7 +82,7 @@ pub fn Hashed(comptime Key: type, comptime Value: type, comptime keyer: Keyer(Ke
///
pub fn assign(self: *Self, allocator: io.Allocator, key: Key, value: Value) io.AllocationError!?Entry {
if (self.calculate_load_factor() >= load_max) {
const growth_size = @intToFloat(f64, self.table.len) * growth_factor;
const growth_size = @intToFloat(f64, math.max(1, self.table.len)) * growth_factor;
if (growth_size > math.max_int(@typeInfo(usize).Int)) {
return error.OutOfMemory;
@ -129,7 +129,7 @@ pub fn Hashed(comptime Key: type, comptime Value: type, comptime keyer: Keyer(Ke
/// Returns the calculated load factor of `self` at the moment.
///
pub fn calculate_load_factor(self: Self) f32 {
return @intToFloat(f32, self.count) / @intToFloat(f32, self.table.len);
return if (self.table.len == 0) 1 else @intToFloat(f32, self.count) / @intToFloat(f32, self.table.len);
}
///
@ -160,28 +160,6 @@ pub fn Hashed(comptime Key: type, comptime Value: type, comptime keyer: Keyer(Ke
self.count = 0;
}
///
/// Attempts to allocate and return an empty table with an implementation-defined initial capacity using
/// `allocator` as the memory allocation strategy.
///
/// The function returns [AllocationError] instead if `allocator` cannot commit the memory required for the
/// table capcity size.
///
pub fn init(allocator: io.Allocator) io.AllocationError!Self {
const table = try io.allocate_many(?Entry, 4, allocator);
errdefer io.deallocate(allocator, table);
for (table) |*entry| {
entry.* = null;
}
return Self{
.table = table,
.count = 0,
};
}
///
/// Attempts to write the `key`-`value` pair into `self`, using `allocator` as the memory allocation strategy,
/// if no value already exists with a matching `key`, returning `true` if it was inserted, otherwise `false`.
@ -194,17 +172,16 @@ pub fn Hashed(comptime Key: type, comptime Value: type, comptime keyer: Keyer(Ke
///
pub fn insert(self: *Self, allocator: io.Allocator, key: Key, value: Value) io.AllocationError!bool {
if (self.calculate_load_factor() >= load_max) {
const growth_size = @intToFloat(f64, self.table.len) * growth_factor;
const growth_amount = @intToFloat(f64, self.table.len) * growth_factor;
const min_size = 1;
if (growth_size > math.max_int(@typeInfo(usize).Int)) {
return error.OutOfMemory;
}
try self.rehash(allocator, @floatToInt(usize, growth_size));
try self.rehash(allocator, self.table.len + math.max(min_size, @floatToInt(usize, growth_amount)));
}
debug.assert(self.table.len > self.count);
defer self.count += 1;
return (Entry{
.key = key,
.value = value,
@ -222,8 +199,9 @@ pub fn Hashed(comptime Key: type, comptime Value: type, comptime keyer: Keyer(Ke
{
const hash_max = math.min(math.max_int(hash_info), self.table.len);
var hashed_key = math.wrap(keyer.hasher(key), math.min_int(hash_info), hash_max);
var iterations = @as(usize, 0);
while (true) {
while (iterations < self.count) : (iterations += 1) {
const entry = &(self.table[hashed_key] orelse return null);
if (keyer.comparer(entry.key, key) == 0) {
@ -260,6 +238,8 @@ pub fn Hashed(comptime Key: type, comptime Value: type, comptime keyer: Keyer(Ke
entry.* = null;
}
if (old_table.len != 0)
{
for (old_table) |maybe_entry| {
if (maybe_entry) |entry| {
debug.assert(entry.write_into(self.table));
@ -268,6 +248,7 @@ pub fn Hashed(comptime Key: type, comptime Value: type, comptime keyer: Keyer(Ke
io.deallocate(allocator, old_table);
}
}
};
}

113
source/coral/utf8.zig
View File

@ -1,9 +1,24 @@
const std = @import("std");
const debug = @import("./debug.zig");
const io = @import("./io.zig");
const math = @import("./math.zig");
const std = @import("std");
///
///
///
pub const ArgsContext = struct {
writer: io.Writer,
index: usize,
};
///
///
///
pub const ArgsFormatter = io.Functor(PrintError!void, ArgsContext);
///
/// Errors that may occur during utf8-encoded int parsing.
///
@ -31,6 +46,17 @@ pub const PrintError = error {
PrintIncomplete,
};
pub fn format_args(args: anytype) ArgsFormatter {
const Args = @TypeOf(args);
return ArgsFormatter.bind(Args, &args, struct {
fn get(typed_args: *const Args, context: ArgsContext) PrintError!void {
_ = typed_args;
_ = context;
}
}.get);
}
///
/// Attempts to parse a float value of type described by `float` from `utf8`.
///
@ -146,6 +172,91 @@ pub fn print(writer: io.Writer, utf8: []const u8) PrintError!void {
}
}
///
///
///
pub fn print_float(comptime float: std.builtin.Type.Float, writer: io.Writer, value: @Type(float)) PrintError!void {
_ = writer;
_ = value;
}
///
/// Prints the format string `format` with all `{...}` placeholders substituted with the a value in `args` corresponding
/// to the ordinality of each substitution.
///
/// Specifiers may be placed inside `{}` to augment the behavior of the corresponding [FormatArg]. For example, to print
/// a float formatted with an integer component padding of `3`, a decimal padding of `2`, and a prefix for positives as
/// well as negatives, you may specify it as `{+3.2}`.
///
/// To prevent braces from being interpreted as format placeholders, simply double-brace them (`"{{"`) and the format
/// string will substitute them as a single brace.
///
/// *Note* the function assumes that, for every specifier in `format`, there is a corresponding [FormatArg] in `args`.
/// Further, any instance of `{` is assumed to be a placeholder and must be terminated with a corresponding `}` before
/// the end of string. Failure to meet any of these requirements will result in safety-checked runtime behavior.
///
pub fn print_formatted(writer: io.Writer, format: []const u8, args_formatter: ArgsFormatter) PrintError!void {
const usize_int = @typeInfo(usize).Int;
var head = @as(usize, 0);
var tail = @as(usize, 0);
var arg_index = @as(usize, 0);
while (tail < format.len) : (tail += 1) {
if (format[tail] == '{') {
debug.assert(tail < format.len);
tail += 1;
switch (format[tail]) {
'{' => {
try print(writer, format[head .. tail]);
tail += 1;
head = tail;
},
'}' => {
try print(writer, format[head .. tail]);
try args_formatter.invoke(.{
.index = arg_index,
.writer = writer,
});
arg_index += 1;
tail += 1;
head = tail;
},
else => {
try print(writer, format[head .. tail]);
tail += 1;
head = tail;
debug.assert(tail < format.len);
while (format[tail] != '}') {
tail += 1;
debug.assert(tail < format.len);
}
const arg_index_name = format[head .. tail];
try args_formatter.invoke(.{
.index = parse_int(usize_int, arg_index_name, .{}) catch @panic("invalid arg index value"),
.writer = writer,
});
tail += 1;
head = tail;
}
}
}
}
}
///
/// Attempts to print the int `value` described by `int` to `writer`.
///

341
source/ona/kym/Ast.zig Executable file
View File

@ -0,0 +1,341 @@
const coral = @import("coral");
const tokens = @import("./tokens.zig");
const types = @import("./types.zig");
allocator: coral.io.Allocator,
arena: coral.arena.Stacking,
statements: StatementList,
error_message: []const u8,
pub const Expression = union (enum) {
nil_literal,
true_literal,
false_literal,
integer_literal: types.Integer,
float_literal: types.Float,
string_literal: []const u8,
array_literal: coral.list.Stack(Expression),
table_literal: coral.list.Stack(struct {
identifier: []const u8,
expression: Expression,
}),
grouped_expression: *Expression,
binary_operation: struct {
operator: tokens.Token,
lhs_expression: *Expression,
rhs_expression: *Expression,
},
unary_operation: struct {
operator: tokens.Token,
expression: *Expression,
},
};
const ExpressionParser = fn (self: *Self, tokenizer: *tokens.Tokenizer) types.ParseError!Expression;
const Self = @This();
pub const Statement = union (enum) {
return_expression: Expression,
return_nothing,
};
const StatementList = coral.list.Stack(Statement);
const UnaryOperation = enum {
boolean_negation,
numeric_negation,
};
fn binary_operation_parser(comptime parse_next: ExpressionParser, comptime operators: []const tokens.Token) ExpressionParser {
return struct {
fn parse(self: *Self, tokenizer: *tokens.Tokenizer) types.ParseError!Expression {
var expression = try parse_next(self, tokenizer);
{
const allocator = self.arena.as_allocator();
inline for (operators) |operator| {
if (tokenizer.current_token == coral.io.tag_of(operator)) {
try self.check_syntax(
tokenizer.step(.{.include_newlines = true}),
"expected right-hand side of expression after `" ++ comptime operator.text() ++ "`");
expression = .{
.binary_operation = .{
.operator = operator,
.lhs_expression = try coral.io.allocate_one(allocator, expression),
.rhs_expression = try coral.io.allocate_one(allocator, try parse_next(self, tokenizer)),
},
};
}
}
}
return expression;
}
}.parse;
}
fn check_syntax(self: *Self, condition: bool, error_message: []const u8) types.ParseError!void {
if (condition) {
return;
}
return self.fail_syntax(error_message);
}
pub fn deinit(self: *Self) void {
self.arena.clear_allocations();
self.statements.deinit(self.allocator);
}
fn fail_syntax(self: *Self, error_message: []const u8) types.ParseError {
self.error_message = error_message;
return error.BadSyntax;
}
pub fn init(allocator: coral.io.Allocator) coral.io.AllocationError!Self {
return Self{
.arena = .{
.base_allocator = allocator,
.min_page_size = 4096,
},
.allocator = allocator,
.statements = .{},
.error_message = "",
};
}
pub fn list_statements(self: Self) []const Statement {
return self.statements.values;
}
pub fn parse(self: *Self, tokenizer: *tokens.Tokenizer) types.ParseError!void {
self.reset();
errdefer self.reset();
var has_not_returned_yet = true;
while (tokenizer.step(.{.include_newlines = false})) {
switch (tokenizer.current_token) {
.keyword_return => {
try self.check_syntax(has_not_returned_yet, "cannot return more than once per function scope");
try self.statements.push_one(self.allocator, get_statement: {
if (tokenizer.step(.{.include_newlines = true})) {
if (tokenizer.current_token != .newline) {
break: get_statement .{.return_expression = try self.parse_expression(tokenizer)};
}
if (tokenizer.step(.{.include_newlines = true})) {
try self.check_syntax(
tokenizer.current_token == .newline,
"expected end of declaration after return expression");
}
}
break: get_statement .return_nothing;
});
has_not_returned_yet = false;
},
else => return self.fail_syntax("invalid statement"),
}
}
}
const parse_comparison = binary_operation_parser(parse_term, &.{
.symbol_greater_than,
.symbol_greater_equals,
.symbol_less_than,
.symbol_less_equals
});
const parse_equality = binary_operation_parser(parse_comparison, &.{
.symbol_double_equals,
});
const parse_expression = binary_operation_parser(parse_equality, &.{
.symbol_plus,
.symbol_minus,
});
fn parse_factor(self: *Self, tokenizer: *tokens.Tokenizer) types.ParseError!Expression {
switch (tokenizer.current_token) {
.symbol_paren_left => {
try self.check_syntax(tokenizer.step(.{.include_newlines = false}), "expected an expression after `(`");
const expression = try self.parse_expression(tokenizer);
try self.check_syntax(
tokenizer.step(.{.include_newlines = false}) and tokenizer.current_token == .symbol_paren_right,
"expected a closing `)` after expression");
return Expression{.grouped_expression = try coral.io.allocate_one(self.arena.as_allocator(), expression)};
},
.integer => |value| {
_ = tokenizer.step(.{.include_newlines = false});
return Expression{
.integer_literal = coral.utf8.parse_int(@typeInfo(types.Integer).Int, value, .{}) catch |parse_error| {
return self.fail_syntax(switch (parse_error) {
error.BadSyntax => "invalid integer literal",
error.IntOverflow => "integer literal is too big",
});
},
};
},
.real => |value| {
_ = tokenizer.step(.{.include_newlines = false});
return Expression{
.float_literal = coral.utf8.parse_float(@typeInfo(types.Float).Float, value) catch |parse_error| {
return self.fail_syntax(switch (parse_error) {
error.BadSyntax => "invalid float literal",
});
},
};
},
.string => |value| {
_ = tokenizer.step(.{.include_newlines = false});
return Expression{.string_literal = value};
},
.symbol_bracket_left => {
try self.check_syntax(tokenizer.step(.{.include_newlines = false}), "unexpected end of array literal");
var expression = Expression{.array_literal = .{}};
coral.debug.assert(expression == .array_literal);
const allocator = self.arena.as_allocator();
const array_average_maximum = 32;
try expression.array_literal.grow(allocator, array_average_maximum);
while (true) {
switch (tokenizer.current_token) {
.symbol_bracket_right => {
_ = tokenizer.step(.{.include_newlines = false});
return expression;
},
else => {
try self.check_syntax(
tokenizer.step(.{.include_newlines = false}),
"expected `]` or expression after `[`");
try expression.array_literal.push_one(allocator, try self.parse_expression(tokenizer));
},
}
}
},
.symbol_brace_left => {
try self.check_syntax(tokenizer.step(.{.include_newlines = false}), "unexpected end of table literal");
var expression = Expression{.table_literal = .{}};
coral.debug.assert(expression == .table_literal);
const allocator = self.arena.as_allocator();
while (true) {
switch (tokenizer.current_token) {
.symbol_brace_right => {
_ = tokenizer.step(.{.include_newlines = false});
return expression;
},
.local => |identifier| {
try self.check_syntax(
tokenizer.step(.{.include_newlines = false}) and tokenizer.current_token == .symbol_equals,
"expected `=` after identifier");
try self.check_syntax(tokenizer.step(.{.include_newlines = false}), "unexpected end after `=`");
try expression.table_literal.push_one(allocator, .{
.identifier = identifier,
.expression = try self.parse_expression(tokenizer),
});
switch (tokenizer.current_token) {
.symbol_comma => _ = tokenizer.step(.{.include_newlines = false}),
.symbol_brace_right => {
_ = tokenizer.step(.{.include_newlines = false});
return expression;
},
else => return self.fail_syntax("expected `,` or `}` after expression"),
}
},
else => return self.fail_syntax("expected `}` or fields in table literal"),
}
}
},
.symbol_minus => {
try self.check_syntax(
tokenizer.step(.{.include_newlines = false}),
"expected expression after numeric negation (`-`)");
return Expression{
.unary_operation = .{
.expression = try coral.io.allocate_one(
self.arena.as_allocator(),
try self.parse_factor(tokenizer)),
.operator = .symbol_minus,
},
};
},
.symbol_bang => {
try self.check_syntax(
tokenizer.step(.{.include_newlines = false}),
"expected expression after numeric negation (`!`)");
return Expression{
.unary_operation = .{
.expression = try coral.io.allocate_one(
self.arena.as_allocator(),
try self.parse_factor(tokenizer)),
.operator = .symbol_bang,
},
};
},
else => return self.fail_syntax("unexpected token in expression"),
}
}
const parse_term = binary_operation_parser(parse_factor, &.{
.symbol_asterisk,
.symbol_forward_slash,
});
pub fn reset(self: *Self) void {
self.statements.clear();
self.arena.clear_allocations();
}

91
source/ona/kym/Chunk.zig
View File

@ -1,6 +1,6 @@
const Environment = @import("./Environment.zig");
const Ast = @import("./Ast.zig");
const ast = @import("./ast.zig");
const Environment = @import("./Environment.zig");
const coral = @import("coral");
@ -51,29 +51,15 @@ fn clear_error_details(self: *Self) void {
}
pub fn compile(self: *Self, data: []const u8) types.RuntimeError!void {
var ast = try Ast.init(self.env.allocator);
errdefer ast.deinit();
{
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| {
ast.parse(&tokenizer) catch |init_error| {
if (init_error == error.OutOfMemory) {
self.clear_error_details();
try self.message_data.push_all(self.env.allocator, "@(");
@ -89,16 +75,31 @@ pub fn compile(self: *Self, data: []const u8) types.RuntimeError!void {
return error.OutOfMemory;
};
coral.utf8.print(message_writer, invalid) catch {
coral.utf8.print(message_writer, ast.error_message) catch {
return error.OutOfMemory;
};
}
return error.BadSyntax;
return init_error;
};
}
for (ast.list_statements()) |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);
},
}
}
}
pub fn compile_expression(self: *Self, expression: ast.Expression) types.RuntimeError!void {
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),
@ -159,25 +160,27 @@ pub fn compile_expression(self: *Self, expression: ast.Expression) types.Runtime
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,
.equality_comparison => .compare_eq,
.greater_than_comparison => .compare_gt,
.greater_equals_comparison => .compare_ge,
.less_than_comparison => .compare_lt,
.less_equals_comparison => .compare_le,
try self.emit_opcode(switch (operation.operator) {
.symbol_plus => .add,
.symbol_minus => .sub,
.symbol_asterisk => .mul,
.symbol_forward_slash => .div,
.symbol_double_equals => .compare_eq,
.symbol_greater_than => .compare_gt,
.symbol_greater_equals => .compare_ge,
.symbol_less_than => .compare_lt,
.symbol_less_equals => .compare_le,
else => unreachable,
});
},
.unary_operation => |operation| {
try self.compile_expression(operation.expression.*);
try self.emit_opcode(switch (operation.kind) {
.boolean_negation => .not,
.numeric_negation => .neg,
try self.emit_opcode(switch (operation.operator) {
.symbol_bang => .not,
.symbol_minus => .neg,
else => unreachable,
});
},
@ -217,20 +220,16 @@ pub fn error_details(self: Self) []const u8 {
}
pub fn init(env: *Environment, chunk_name: []const u8) coral.io.AllocationError!Self {
var bytecode_buffer = try Buffer.init(env.allocator, 0);
var message_data = Buffer{};
errdefer bytecode_buffer.deinit(env.allocator);
var message_data = try Buffer.init(env.allocator, chunk_name.len);
try message_data.push_all(env.allocator, chunk_name);
errdefer message_data.deinit(env.allocator);
message_data.push_all(env.allocator, chunk_name) catch unreachable;
return Self{
.env = env,
.message_data = message_data,
.bytecode_buffer = bytecode_buffer,
.bytecode_buffer = .{},
.message_name_len = chunk_name.len,
};
}

52
source/ona/kym/Environment.zig
View File

@ -235,8 +235,10 @@ pub fn execute_file(self: *Self, fs: file.System, file_path: file.Path) ExecuteF
defer readable_file.close();
var file_source = coral.list.Stack(u8){};
const file_size = (try fs.query_info(file_path)).size;
var file_source = try coral.list.Stack(u8).init(self.allocator, file_size);
try file_source.grow(self.allocator, file_size);
defer file_source.deinit(self.allocator);
@ -287,41 +289,35 @@ pub fn get_object(self: *Self, indexable: types.Ref, index: types.Ref) types.Run
}
pub fn init(allocator: coral.io.Allocator, options: InitOptions) !Self {
var values = try ValueStack.init(allocator, options.values_max * options.calls_max);
errdefer values.deinit(allocator);
var calls = try CallStack.init(allocator, options.calls_max);
errdefer calls.deinit(allocator);
var interned = try InternTable.init(allocator);
errdefer interned.deinit(allocator);
var heap = try ObjectSlab.init(allocator);
errdefer heap.deinit(allocator);
var environment = Self{
var env = Self{
.global_object = 0,
.allocator = allocator,
.reporter = options.reporter,
.interned = interned,
.values = values,
.calls = calls,
.heap = heap,
.interned = .{},
.values = .{},
.calls = .{},
.heap = .{},
};
const globals = try environment.new_object(&.{}, .{
errdefer {
env.values.deinit(allocator);
env.calls.deinit(allocator);
}
try env.values.grow(allocator, options.values_max * options.calls_max);
try env.calls.grow(allocator, options.calls_max);
{
const globals = try env.new_object(&.{}, .{
.identity = "KYM GLOBAL OBJECT OC DO NOT STEAL",
});
coral.debug.assert(globals == .object);
environment.global_object = globals.object;
env.global_object = globals.object;
}
return environment;
return env;
}
pub fn intern(self: *Self, string: []const u8) coral.io.AllocationError!types.Ref {
@ -360,17 +356,13 @@ pub fn new_object(self: *Self, userdata: []const u8, info: ObjectInfo) coral.io.
coral.io.copy(allocation, userdata);
var fields = try Object.Fields.init(self.allocator);
errdefer fields.deinit(self.allocator);
return .{.object = try self.heap.insert(self.allocator, .{
.ref_count = 1,
.state = .{
.info = info,
.userdata = allocation,
.fields = fields,
.fields = .{},
},
})};
}

755
source/ona/kym/ast.zig
View File

@ -1,755 +0,0 @@
const coral = @import("coral");
const tokens = @import("./tokens.zig");
const types = @import("./types.zig");
const ArrayElements = coral.list.Stack(Expression);
pub const BinaryOperation = enum {
addition,
subtraction,
multiplication,
division,
equality_comparison,
greater_than_comparison,
greater_equals_comparison,
less_than_comparison,
less_equals_comparison,
};
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_lhs_expression = try init_equality(allocator, tokenizer);
switch (parsed_lhs_expression) {
.valid => |*lhs_expression| {
var expression = lhs_expression.*;
var is_invalid = true;
defer if (is_invalid) {
expression.deinit(allocator);
};
if (tokenizer.current_token == .symbol_plus) {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `+`"};
}
var parsed_rhs_expression = try init_equality(allocator, tokenizer);
switch (parsed_rhs_expression) {
.valid => |*rhs_expression| {
errdefer rhs_expression.deinit(allocator);
expression = try Expression.init_binary_operation(
allocator,
.addition,
lhs_expression,
rhs_expression);
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
if (tokenizer.current_token == .symbol_minus) {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `-`"};
}
var parsed_rhs_expression = try init_equality(allocator, tokenizer);
switch (parsed_rhs_expression) {
.valid => |*rhs_expression| {
errdefer rhs_expression.deinit(allocator);
expression = try Expression.init_binary_operation(
allocator,
.subtraction,
lhs_expression,
rhs_expression);
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
is_invalid = false;
return ParsedExpression{.valid = expression};
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
pub fn init_comparison(
allocator: coral.io.Allocator,
tokenizer: *tokens.Tokenizer) coral.io.AllocationError!ParsedExpression {
var parsed_lhs_expression = try init_term(allocator, tokenizer);
switch (parsed_lhs_expression) {
.valid => |*lhs_expression| {
var expression = lhs_expression.*;
var is_invalid = true;
defer if (is_invalid) {
expression.deinit(allocator);
};
if (tokenizer.current_token == .symbol_greater_than) {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `>`"};
}
var parsed_rhs_expression = try init_term(allocator, tokenizer);
switch (parsed_rhs_expression) {
.valid => |*rhs_expression| {
errdefer rhs_expression.deinit(allocator);
expression = try Expression.init_binary_operation(
allocator,
.greater_than_comparison,
lhs_expression,
rhs_expression);
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
if (tokenizer.current_token == .symbol_greater_equals) {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `>=`"};
}
var parsed_rhs_expression = try init_term(allocator, tokenizer);
switch (parsed_rhs_expression) {
.valid => |*rhs_expression| {
errdefer rhs_expression.deinit(allocator);
expression = try Expression.init_binary_operation(
allocator,
.greater_equals_comparison,
lhs_expression,
rhs_expression);
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
if (tokenizer.current_token == .symbol_less_than) {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `<`"};
}
var parsed_rhs_expression = try init_term(allocator, tokenizer);
switch (parsed_rhs_expression) {
.valid => |*rhs_expression| {
errdefer rhs_expression.deinit(allocator);
expression = try Expression.init_binary_operation(
allocator,
.less_than_comparison,
lhs_expression,
rhs_expression);
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
if (tokenizer.current_token == .symbol_less_equals) {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `<=`"};
}
var parsed_rhs_expression = try init_term(allocator, tokenizer);
switch (parsed_rhs_expression) {
.valid => |*rhs_expression| {
errdefer rhs_expression.deinit(allocator);
expression = try Expression.init_binary_operation(
allocator,
.less_equals_comparison,
lhs_expression,
rhs_expression);
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
is_invalid = false;
return ParsedExpression{.valid = expression};
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
fn init_equality(
allocator: coral.io.Allocator,
tokenizer: *tokens.Tokenizer) coral.io.AllocationError!ParsedExpression {
var parsed_lhs_expression = try init_comparison(allocator, tokenizer);
switch (parsed_lhs_expression) {
.valid => |*lhs_expression| {
var expression = lhs_expression.*;
var is_invalid = true;
defer if (is_invalid) {
expression.deinit(allocator);
};
if (tokenizer.current_token == .symbol_double_equals) {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `==`"};
}
var parsed_rhs_expression = try init_comparison(allocator, tokenizer);
switch (parsed_rhs_expression) {
.valid => |*rhs_expression| {
errdefer rhs_expression.deinit(allocator);
expression = try Expression.init_binary_operation(
allocator,
.equality_comparison,
lhs_expression,
rhs_expression);
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
is_invalid = false;
return ParsedExpression{.valid = 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(.ignore_newlines)) {
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(.ignore_newlines)) 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| 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| 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| return ParsedExpression{
.valid = .{.string_literal = value},
},
.symbol_bracket_left => {
if (tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "unexpected end of array literal"};
}
var is_invalid = true;
var array_elements = try ArrayElements.init(allocator, 0);
defer if (is_invalid) {
array_elements.deinit(allocator);
};
while (true) {
switch (tokenizer.current_token) {
.symbol_bracket_right => {
_ = tokenizer.step(.ignore_newlines);
is_invalid = false;
return ParsedExpression{
.valid = .{.array_literal = array_elements},
};
},
else => {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected `]` or expression after `[`"};
}
var parsed_expression = try ParsedExpression.init(allocator, tokenizer);
switch (parsed_expression) {
.valid => |*expression| {
errdefer expression.deinit(allocator);
try array_elements.push_one(allocator, expression.*);
},
.invalid => |detail| return ParsedExpression{.invalid = detail},
}
},
}
}
},
.symbol_brace_left => {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "unexpected end of table literal"};
}
var is_invalid = true;
var table_fields = try TableFields.init(allocator, 0);
defer if (is_invalid) {
table_fields.deinit(allocator);
};
while (true) {
switch (tokenizer.current_token) {
.symbol_brace_right => {
_ = tokenizer.step(.ignore_newlines);
is_invalid = false;
return ParsedExpression{
.valid = .{.table_literal = table_fields},
};
},
.local => |identifier| {
const key = identifier;
if (!tokenizer.step(.ignore_newlines) or tokenizer.current_token != .symbol_equals) {
return ParsedExpression{.invalid = "expected `=` after identifier"};
}
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "unexpected end after `=`"};
}
var parsed_expression = try init(allocator, tokenizer);
switch (parsed_expression) {
.valid => |*expression| {
errdefer expression.deinit(allocator);
try table_fields.push_one(allocator, .{
.identifier = key,
.expression = expression.*,
});
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "unexpected end after expression"};
}
switch (tokenizer.current_token) {
.symbol_comma => _ = tokenizer.step(.ignore_newlines),
.symbol_brace_right => {
_ = tokenizer.step(.ignore_newlines);
is_invalid = false;
return ParsedExpression{
.valid = .{.table_literal = table_fields},
};
},
else => return ParsedExpression{.invalid = "expected `,` or `}` after expression"},
}
},
else => return ParsedExpression{.invalid = "expected `}` or fields in table literal"},
}
}
},
.symbol_minus => {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected expression after numeric negation (`-`)"};
}
var parsed_factor_expression = try init_factor(allocator, tokenizer);
switch (parsed_factor_expression) {
.valid => |*factor_expression| {
errdefer factor_expression.deinit(allocator);
return ParsedExpression{
.valid = try Expression.init_unary_operation(
allocator,
.numeric_negation,
factor_expression),
};
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
},
.symbol_bang => {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected expression after boolean negation (`!`)"};
}
var parsed_factor_expression = try init_factor(allocator, tokenizer);
switch (parsed_factor_expression) {
.valid => |*factor_expression| {
errdefer factor_expression.deinit(allocator);
return ParsedExpression{
.valid = try Expression.init_unary_operation(
allocator,
.boolean_negation,
factor_expression),
};
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
},
else => return ParsedExpression{.invalid = "unexpected token in expression"},
}
}
pub fn init_term(allocator: coral.io.Allocator, tokenizer: *tokens.Tokenizer) coral.io.AllocationError!ParsedExpression {
var parsed_lhs_expression = try init_factor(allocator, tokenizer);
switch (parsed_lhs_expression) {
.valid => |*lhs_expression| {
var expression = lhs_expression.*;
var is_invalid = true;
defer if (is_invalid) {
expression.deinit(allocator);
};
if (tokenizer.current_token == .symbol_asterisk) {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `*`"};
}
var parsed_rhs_expression = try init_factor(allocator, tokenizer);
switch (parsed_rhs_expression) {
.valid => |*rhs_expression| {
errdefer rhs_expression.deinit(allocator);
expression = try Expression.init_binary_operation(
allocator,
.multiplication,
lhs_expression,
rhs_expression);
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
if (tokenizer.current_token == .symbol_forward_slash) {
if (!tokenizer.step(.ignore_newlines)) {
return ParsedExpression{.invalid = "expected right-hand side of expression after `/`"};
}
var parsed_rhs_expression = try init_equality(allocator, tokenizer);
switch (parsed_rhs_expression) {
.valid => |*rhs_expression| {
errdefer rhs_expression.deinit(allocator);
expression = try Expression.init_binary_operation(
allocator,
.division,
lhs_expression,
rhs_expression);
},
.invalid => |details| return ParsedExpression{.invalid = details},
}
}
is_invalid = false;
return ParsedExpression{.valid = 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(.ignore_newlines)) {
switch (tokenizer.current_token) {
.keyword_return => {
if (has_returned) {
return ParsedStatements{.invalid = "cannot return more than once per function scope"};
}
if (tokenizer.step(.include_newlines) 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(.ignore_newlines) and tokenizer.current_token != .newline) {
return ParsedStatements{.invalid = "expected newline"};
}
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,
array_literal: ArrayElements,
table_literal: TableFields,
grouped_expression: *Expression,
binary_operation: struct {
kind: BinaryOperation,
lhs_expression: *Expression,
rhs_expression: *Expression,
},
unary_operation: struct {
kind: UnaryOperation,
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 => {},
.array_literal => |*elements| {
for (elements.values) |*element_expression| {
element_expression.deinit(allocator);
}
elements.deinit(allocator);
},
.table_literal => |*fields| {
for (fields.values) |*field| {
field.expression.deinit(allocator);
}
fields.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);
}
}
}
fn init_binary_operation(
allocator: coral.io.Allocator,
kind: BinaryOperation,
lhs_expression: *const Expression,
rhs_operation: *const Expression) coral.io.AllocationError!Expression {
const allocated_lhs_expression = try coral.io.allocate_one(allocator, lhs_expression.*);
errdefer coral.io.deallocate(allocator, allocated_lhs_expression);
const allocated_rhs_expression = try coral.io.allocate_one(allocator, rhs_operation.*);
errdefer coral.io.deallocate(allocator, allocated_rhs_expression);
return Expression{
.binary_operation = .{
.kind = kind,
.lhs_expression = allocated_lhs_expression,
.rhs_expression = allocated_rhs_expression,
},
};
}
fn init_unary_operation(
allocator: coral.io.Allocator,
kind: UnaryOperation,
expression: *const Expression) coral.io.AllocationError!Expression {
const allocated_expression = try coral.io.allocate_one(allocator, expression.*);
errdefer coral.io.deallocate(allocator, allocated_expression);
return Expression{
.unary_operation = .{
.kind = kind,
.expression = allocated_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);
}
};
const TableFields = coral.list.Stack(struct {
identifier: []const u8,
expression: Expression,
});
pub const UnaryOperation = enum {
boolean_negation,
numeric_negation,
};

69
source/ona/kym/tokens.zig
View File

@ -7,7 +7,6 @@ pub const Token = union(enum) {
global: []const u8,
local: []const u8,
symbol_assign,
symbol_plus,
symbol_minus,
symbol_asterisk,
@ -43,25 +42,32 @@ pub const Token = union(enum) {
pub fn text(self: Token) []const u8 {
return switch (self) {
.unknown => |unknown| @ptrCast([*]const u8, &unknown)[0 .. 1],
.identifier_global => |identifier| identifier,
.identifier_local => |identifier| identifier,
.newline => "newline",
.assign => "=",
.plus => "+",
.minus => "-",
.asterisk => "*",
.forward_slash => "/",
.paren_left => "(",
.paren_right => ")",
.bang => "!",
.comma => ",",
.at => "@",
.brace_left => "{",
.brace_right => "}",
.bracket_left => "[",
.bracket_right => "]",
.period => ".",
.arrow => "=>",
.global => |identifier| identifier,
.local => |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_lambda => "=>",
.symbol_less_than => "<",
.symbol_less_equals => "<=",
.symbol_greater_than => ">",
.symbol_greater_equals => ">=",
.symbol_equals => "=",
.symbol_double_equals => "==",
.integer => |literal| literal,
.real => |literal| literal,
@ -79,17 +85,23 @@ pub const Token = union(enum) {
pub const Tokenizer = struct {
source: []const u8,
lines_stepped: usize = 1,
previous_token: Token = .newline,
current_token: Token = .newline,
current_token: Token = .{.unknown = 0},
pub fn step(self: *Tokenizer, newline_rules: enum { ignore_newlines, include_newlines }) bool {
self.previous_token = self.current_token;
const StepOptions = struct {
include_newlines: bool,
};
const default_token = Token{.unknown = 0};
pub fn step(self: *Tokenizer, options: StepOptions) bool {
var cursor = @as(usize, 0);
defer self.source = self.source[cursor ..];
while (cursor < self.source.len) switch (self.source[cursor]) {
defer @import("std").debug.print("{s}\n", .{self.current_token.text()});
while (cursor < self.source.len) {
switch (self.source[cursor]) {
'#' => {
cursor += 1;
@ -103,15 +115,11 @@ pub const Tokenizer = struct {
'\n' => {
cursor += 1;
switch (newline_rules) {
.include_newlines => {
if (options.include_newlines) {
self.lines_stepped += 1;
self.current_token = .newline;
return true;
},
else => {},
}
},
@ -401,7 +409,8 @@ pub const Tokenizer = struct {
return true;
},
};
}
}
self.current_token = .newline;

5
source/ona/kym/types.zig
View File

@ -28,10 +28,13 @@ pub const Ref = union (Primitive) {
object: Object,
};
pub const RuntimeError = coral.io.AllocationError || CheckError || error {
pub const ParseError = error {
OutOfMemory,
BadSyntax,
};
pub const RuntimeError = CheckError || ParseError;
pub const Val = union (Primitive) {
nil,
false,

6
source/ona/ona.zig
View File

@ -59,17 +59,15 @@ pub fn run_app(base_file_system: file.System) void {
const Logger = struct {
const Self = @This();
fn log(_: *Self, message: []const u8) void {
fn log(_: *const Self, message: []const u8) void {
ext.SDL_LogError(ext.SDL_LOG_CATEGORY_APPLICATION, "%.*s", message.len, message.ptr);
}
};
var logger = Logger{};
var script_environment = kym.Environment.init(heap.allocator, .{
.values_max = 512,
.calls_max = 512,
.reporter = kym.Environment.Reporter.bind(Logger, &logger, Logger.log),
.reporter = kym.Environment.Reporter.bind(Logger, &.{}, Logger.log),
}) catch {
return ext.SDL_LogError(ext.SDL_LOG_CATEGORY_APPLICATION, "failed to initialize Kym vm\n");
};

7
source/runner.zig
View File

@ -1,5 +1,12 @@
const coral = @import("coral");
const ona = @import("ona");
pub fn main() !void {
var data = [_]u8{0} ** 32;
var fixed_buffer = coral.io.FixedBuffer{.slice = &data};
try coral.utf8.print_formatted(fixed_buffer.as_writer(), "hello, {}", coral.utf8.format_args(.{"world"}));
ona.run_app(.{.sandboxed_path = &ona.file.Path.cwd});
}