✓
Passing This code compiles and runs correctly.
Code
// PINS: std/grid has a JAVASCRIPT lowering — the same declaration, write and
// read that run on the Zig lane run under --lang=js. The type object keeps
// the Zig artifact's names (`__KoruGridT_<g>.__koru_at` / `__koru_wide`,
// `__koru_grid_<g>`), so the one shared `grid_read.lower` resolves against
// either target's declaration; the write unit's proc carries the target tag.
// Before this lowering existed the JS emitter met the write unit's |zig proc
// and PANICKED (NoJsProcBody) — a grid program had no JS path at all.
// The read-back through a second write's value and a fmt interpolation pins
// that reads lower everywhere, not only inside write blocks.
import std/io
import std/grid
std/grid:new(xref, size: 4) { h: 0[i64] }
std/grid:stored { xref[1].h: 5 }
std/grid:stored { xref[2].h: xref[1].h + 1 }
std/io:print.ln("cell1 {{ xref[1].h:d }} cell2 {{ xref[2].h:d }}")
Actual
cell1 5 cell2 6
Expected output
✓ Zig✓ JavaScriptcell1 5 cell2 6
Emitted Zig source
// Access compiler flags via the per-user compiler_env module
const CompilerEnv = @import("compiler_env").CompilerEnv;
pub const panic = if (@import("builtin").mode == .Debug)
@import("std").debug.FullPanic(@import("std").debug.defaultPanic)
else
@import("std").debug.simple_panic;
const __koru_bare = struct {
extern fn posix_memalign(memptr: *?*anyopaque, alignment: usize, size: usize) c_int;
extern fn free(ptr: ?*anyopaque) void;
fn bareAlloc(_: *anyopaque, len: usize, alignment: @import("std").mem.Alignment, _: usize) ?[*]u8 {
var p: ?*anyopaque = null;
const a = @max(alignment.toByteUnits(), @sizeOf(usize));
if (posix_memalign(&p, a, len) != 0) return null;
return @ptrCast(p);
}
fn bareResize(_: *anyopaque, _: []u8, _: @import("std").mem.Alignment, _: usize, _: usize) bool { return false; }
fn bareRemap(_: *anyopaque, _: []u8, _: @import("std").mem.Alignment, _: usize, _: usize) ?[*]u8 { return null; }
fn bareFree(_: *anyopaque, memory: []u8, _: @import("std").mem.Alignment, _: usize) void { free(@ptrCast(memory.ptr)); }
const vtable = @import("std").mem.Allocator.VTable{ .alloc = bareAlloc, .resize = bareResize, .remap = bareRemap, .free = bareFree };
const allocator = @import("std").mem.Allocator{ .ptr = undefined, .vtable = &vtable };
};
const __koru_backing = if (@import("builtin").link_libc) @import("std").heap.c_allocator else if (@import("builtin").os.tag == .freestanding) __koru_bare.allocator else @import("std").heap.page_allocator;
var __koru_leak_count: usize = 0;
fn __koru_alloc(ctx: *anyopaque, len: usize, alignment: @import("std").mem.Alignment, ret_addr: usize) ?[*]u8 {
_ = ctx;
const r = __koru_backing.rawAlloc(len, alignment, ret_addr);
if (comptime @import("builtin").mode == .Debug) {
if (r != null) __koru_leak_count += 1;
}
return r;
}
fn __koru_resize(ctx: *anyopaque, memory: []u8, alignment: @import("std").mem.Alignment, new_len: usize, ret_addr: usize) bool {
_ = ctx;
return __koru_backing.rawResize(memory, alignment, new_len, ret_addr);
}
fn __koru_remap(ctx: *anyopaque, memory: []u8, alignment: @import("std").mem.Alignment, new_len: usize, ret_addr: usize) ?[*]u8 {
_ = ctx;
return __koru_backing.rawRemap(memory, alignment, new_len, ret_addr);
}
fn __koru_free(ctx: *anyopaque, memory: []u8, alignment: @import("std").mem.Alignment, ret_addr: usize) void {
_ = ctx;
__koru_backing.rawFree(memory, alignment, ret_addr);
if (comptime @import("builtin").mode == .Debug) {
__koru_leak_count -= 1;
}
}
const __koru_vtable = @import("std").mem.Allocator.VTable{ .alloc = __koru_alloc, .resize = __koru_resize, .remap = __koru_remap, .free = __koru_free };
pub fn koru_allocator() @import("std").mem.Allocator {
return .{ .ptr = undefined, .vtable = &__koru_vtable };
}
pub inline fn __koru_intcast(comptime T: type, x: anytype) T {
if (comptime (@import("builtin").mode == .Debug or @import("builtin").mode == .ReleaseSafe))
return @as(T, @intCast(x));
const dst = @typeInfo(T);
const src = @typeInfo(@TypeOf(x));
if (comptime (dst == .int and src == .int and dst.int.bits == src.int.bits and dst.int.signedness != src.int.signedness))
return @as(T, @bitCast(x));
return @as(T, @intCast(x));
}
pub fn koru_leak_check() void {
if (comptime @import("builtin").mode != .Debug) return;
if (__koru_leak_count == 0) return;
if (comptime @import("builtin").target.os.tag == .freestanding) {
if (comptime @import("builtin").cpu.arch == .wasm32 or @import("builtin").cpu.arch == .wasm64) {
@panic("KORU LEAK CHECK FAILED: the produced program leaked");
} else {
const __klc = struct { extern var stdout: ?*anyopaque; extern fn fputs(__s: [*:0]const u8, __st: ?*anyopaque) c_int; };
var __lb: [128]u8 = undefined;
const __lm = "KORU LEAK CHECK FAILED: allocations still outstanding at end of run: ";
@memcpy(__lb[0..__lm.len], __lm);
var __ln: usize = __lm.len;
var __lv = __koru_leak_count;
var __ld: [20]u8 = undefined;
var __lk: usize = 0;
while (__lv > 0) : (__lk += 1) { __ld[__lk] = @intCast('0' + __lv % 10); __lv /= 10; }
for (0..__lk) |__li| { __lb[__ln] = __ld[__lk - 1 - __li]; __ln += 1; }
__lb[__ln] = '\n'; __ln += 1; __lb[__ln] = 0;
_ = __klc.fputs(@as([*:0]const u8, @ptrCast(&__lb)), __klc.stdout);
@trap();
}
} else {
@import("std").debug.print("KORU LEAK CHECK FAILED: the produced program leaked (trace above)\n", .{});
@import("std").process.exit(1);
}
}
pub const main_module = struct {
const __KoruGridT_xref = struct {
h: [4]i64 = [_]i64{0} ** 4,
const __koru_size: usize = 4;
fn __koru_wide(v: anytype) i64 {
return if (@TypeOf(v) == comptime_int) v else @intCast(v);
}
fn __koru_at(i_raw: anytype) usize {
const i = __koru_wide(i_raw);
if (i < 0 or @as(usize, @intCast(i)) >= 4) @panic("std/grid: index out of range for grid 'xref' (size 4) - a grid is addressed by position, and wrapping is the program's to write as `% 4`");
return @as(usize, @intCast(i));
}
};
var __koru_grid_xref: __KoruGridT_xref = .{};
// >>> FLOW: tests/regression/600_STDLIB/697_GRID/697_014_grid_has_a_javascript_lowering/input.k:17 ~input:__grid_write_L17_4f1()
pub fn flow0() void {
_ = main_module.__grid_write_L17_4f1_event.handler(.{ .__koru_gwx0 = main_module.__KoruGridT_xref.__koru_wide(1), .__koru_gwv0 = 5 });
}
// >>> FLOW: tests/regression/600_STDLIB/697_GRID/697_014_grid_has_a_javascript_lowering/input.k:18 ~input:__grid_write_L18_c6dd()
pub fn flow1() void {
_ = main_module.__grid_write_L18_c6dd_event.handler(.{ .__koru_gwx0 = main_module.__KoruGridT_xref.__koru_wide(2), .__koru_gwv0 = (&main_module.__koru_grid_xref.h)[main_module.__KoruGridT_xref.__koru_at(1)] + 1 });
}
// >>> FLOW: tests/regression/600_STDLIB/697_GRID/697_014_grid_has_a_javascript_lowering/input.k:20 ~std.io:print.impl()
pub fn flow2() void {
(struct { fn __kout(__fd: i32, __b: []const u8) void { if (@import("builtin").os.tag == .freestanding) { const __kc = struct { extern var stdout: ?*anyopaque; extern var stderr: ?*anyopaque; extern fn fputs(__s: [*:0]const u8, __st: ?*anyopaque) c_int; }; var __kt: [4096]u8 = undefined; for (0..(__b.len + __kt.len - 2) / (__kt.len - 1)) |__ki| { const __kn = @min(__kt.len - 1, __b.len - __ki * (__kt.len - 1)); @memcpy(__kt[0..__kn], __b[__ki * (__kt.len - 1)..][0..__kn]); __kt[__kn] = 0; @import("std").mem.doNotOptimizeAway(__kc.fputs(@as([*:0]const u8, @ptrCast(&__kt)), if (__fd == 2) __kc.stderr else __kc.stdout)); } } else { @import("std").mem.doNotOptimizeAway(@import("std").posix.write(__fd, __b) catch @as(usize, 0)); } } fn __kw(comptime __f: []const u8, __a: anytype) void { var __kb: [65536]u8 = undefined; const __ks = @import("std").fmt.bufPrint(&__kb, __f, __a) catch __kb[0..0]; __kout(1, __ks); } }).__kw("cell1 {d} cell2 {d}\n", .{(&main_module.__koru_grid_xref.h)[main_module.__KoruGridT_xref.__koru_at(1)], (&main_module.__koru_grid_xref.h)[main_module.__KoruGridT_xref.__koru_at(2)]});
}
pub fn koru_start_flow() void {
const result_0 = koru_koru.start_event.handler(.{ });
const result_0_done = result_0.done;
_ = &result_0_done;
}
pub fn koru_end_flow() void {
const result_0 = koru_koru.end_event.handler(.{ });
const result_0_done = result_0.done;
_ = &result_0_done;
}
pub const __grid_write_L17_4f1_event = struct {
pub const Input = struct {
__koru_gwx0: i64,
__koru_gwv0: i64,
};
pub const Output = void;
pub inline fn handler(__koru_event_input: @This().Input) @This().Output {
return __koru_handler_impl(__koru_event_input.__koru_gwx0, __koru_event_input.__koru_gwv0);
}
fn __koru_handler_impl(__koru_p_0: i64, __koru_p_1: i64) @This().Output {
const __koru_event_input: @This().Input = .{ .__koru_gwx0 = __koru_p_0, .__koru_gwv0 = __koru_p_1 };
// >>> PROC: __grid_write_L17_4f1 [tests/regression/600_STDLIB/697_GRID/697_014_grid_has_a_javascript_lowering/input.k:17]
const __koru_gwx0 = __koru_event_input.__koru_gwx0;
const __koru_gwv0 = __koru_event_input.__koru_gwv0;
_ = &__koru_gwx0;
_ = &__koru_gwv0;
_ = &__koru_event_input;
(&main_module.__koru_grid_xref.h)[main_module.__KoruGridT_xref.__koru_at(__koru_gwx0)] = __koru_gwv0;
}
};
pub const __grid_write_L18_c6dd_event = struct {
pub const Input = struct {
__koru_gwx0: i64,
__koru_gwv0: i64,
};
pub const Output = void;
pub inline fn handler(__koru_event_input: @This().Input) @This().Output {
return __koru_handler_impl(__koru_event_input.__koru_gwx0, __koru_event_input.__koru_gwv0);
}
fn __koru_handler_impl(__koru_p_0: i64, __koru_p_1: i64) @This().Output {
const __koru_event_input: @This().Input = .{ .__koru_gwx0 = __koru_p_0, .__koru_gwv0 = __koru_p_1 };
// >>> PROC: __grid_write_L18_c6dd [tests/regression/600_STDLIB/697_GRID/697_014_grid_has_a_javascript_lowering/input.k:18]
const __koru_gwx0 = __koru_event_input.__koru_gwx0;
const __koru_gwv0 = __koru_event_input.__koru_gwv0;
_ = &__koru_gwx0;
_ = &__koru_gwv0;
_ = &__koru_event_input;
(&main_module.__koru_grid_xref.h)[main_module.__KoruGridT_xref.__koru_at(__koru_gwx0)] = __koru_gwv0;
}
};
};
pub const koru_koru = struct {
pub const start_event = struct {
pub const Input = struct {
};
pub const Output = union(enum(u8)) {
done: struct {
},
};
pub fn handler(__koru_event_input: @This().Input) @This().Output {
_ = &__koru_event_input;
return .{ .done = .{} };
}
};
pub const end_event = struct {
pub const Input = struct {
};
pub const Output = union(enum(u8)) {
done: struct {
},
};
pub fn handler(__koru_event_input: @This().Input) @This().Output {
_ = &__koru_event_input;
return .{ .done = .{} };
}
};
};
pub fn main() void {
main_module.koru_start_flow();
main_module.flow0();
main_module.flow1();
main_module.flow2();
main_module.koru_end_flow();
if (comptime @import("builtin").mode == .Debug) koru_leak_check();
}
test {
@import("std").testing.refAllDeclsRecursive(@This());
}
Flows
flow ~new click a branch to expand · @labels scroll to their anchor
new (xref, size: 4, source: h: 0[i64])
flow ~stored click a branch to expand · @labels scroll to their anchor
stored (source: xref[1].h: 5)
flow ~stored click a branch to expand · @labels scroll to their anchor
stored (source: xref[2].h: xref[1].h + 1)
flow ~print.ln click a branch to expand · @labels scroll to their anchor
print.ln (expr: "cell1 {{ xref[1].h:d }} cell2 {{ xref[2].h:d }}")
Test Configuration
MUST_RUN LANGUAGES: zig js