✓
Passing This code compiles and runs correctly.
Code
// AoC 2015 Day 8 Part 1 — ported to use std/switch:char for the two
// char-dispatch sites in the escape scanner. Output must match the original
// if-tree implementation (12).
import std/io
import std/fs
import std/switch
pub tor measure { line: string } -> { c: i64, m: i64 }
measure = capture { c: 0[i64], m: 0[i64], st: 0[i64] }
! as a |> for(line)
! each ch |> captured { c: a.c + 1 } |> if(a.st == 0)
| then |> captured { st: 1 }
| else |> if(a.st == 2)
| then |> std/switch:char(ch)
| `x` _ |> captured { st: 3 }
| no-match |> captured { m: a.m + 1, st: 1 }
| else |> if(a.st == 3)
| then |> captured { st: 4 }
| else |> if(a.st == 4)
| then |> captured { m: a.m + 1, st: 1 }
| else |> std/switch:char(ch)
| `\` _ |> captured { st: 2 }
| `"` _ |> captured { st: 5 }
| no-match |> captured { m: a.m + 1 }
| captured r -> { r.c, r.m }
capture { diff: 0[i64] }
! as acc |> std/fs:read-lines(path: "tests/regression/600_STDLIB/645_SWITCH/645_004_day08_switch/input.txt")
! line l |> measure(line: l): counted |> captured { diff: acc.diff + counted.c - counted.m }
| done _ |> _
| failed e |> std/io:print.ln("FAILED {{ e:s }}")
| captured total |> std/io:print.ln("{{ total.diff:d }}")
Supporting Files
UnsupportedConstruct
""
"abc"
"aaa\"aaa"
"\x27"
Actual · Zig
✓ pass12
Actual · C#
✗ UnsupportedConstructExpected output
✓ Zig✗ C#12
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 and !@import("builtin").cpu.arch.isWasm()) __koru_bare.allocator else @import("std").heap.page_allocator;
var __koru_leak_count: @import("std").atomic.Value(usize) = .init(0);
var __koru_par_tasks: @import("std").atomic.Value(usize) = .init(0);
const __koru_par_CAP: usize = 128;
threadlocal var __koru_par_depth: usize = 0;
const __koru_par_DEPTH_CAP: usize = 7;
var __koru_par_pool: @import("std").Thread.Pool = undefined;
var __koru_par_pool_ready: bool = false;
var __koru_par_pool_mtx: @import("std").Thread.Mutex = .{};
fn __koru_par_pool_ensure() *@import("std").Thread.Pool {
__koru_par_pool_mtx.lock();
defer __koru_par_pool_mtx.unlock();
if (!__koru_par_pool_ready) {
@import("std").Thread.Pool.init(&__koru_par_pool, .{ .allocator = @import("std").heap.smp_allocator }) catch @panic("koru: thread pool init failed");
__koru_par_pool_ready = true;
}
return &__koru_par_pool;
}
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.fetchAdd(1, .monotonic);
}
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.fetchSub(1, .monotonic);
}
}
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));
}
fn __KoruPadI(comptime T: type) type {
const V = switch (@typeInfo(T)) { .comptime_int => i64, .comptime_float => f64, else => T };
return struct {
v: V,
width: usize,
pub fn format(self: @This(), w: *@import("std").Io.Writer) @import("std").Io.Writer.Error!void {
const rendered = @import("std").fmt.count("{d}", .{self.v});
const pad = self.width -| rendered;
for (0..pad) |_| try w.writeByte(' ');
try w.print("{d}", .{self.v});
}
};
}
pub fn __koru_pad_i(width: usize, value: anytype) __KoruPadI(@TypeOf(value)) {
return .{ .v = value, .width = width };
}
pub fn koru_leak_check() void {
if (comptime @import("builtin").mode != .Debug) return;
if (__koru_leak_count.load(.acquire) == 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.load(.acquire);
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 {
pub const measure_event = struct {
pub const Input = struct {
line: []const u8,
};
pub const Output = struct { c: i64, m: i64 };
pub fn handler(__koru_event_input: @This().Input) @This().Output {
// >>> SUBFLOW: tests/regression/600_STDLIB/645_SWITCH/645_004_day08_switch/input.k:11
const line = __koru_event_input.line;
_ = &line;
_ = &__koru_event_input;
const __KoruCaptureT_a = comptime blk: {
const __info = @typeInfo(@TypeOf(.{ .c = @as(i64, 0), .m = @as(i64, 0), .st = @as(i64, 0) }));
var __fields: [__info.@"struct".fields.len]@import("std").builtin.Type.StructField = undefined;
for (__info.@"struct".fields, 0..) |__f, __i| {
__fields[__i] = .{ .name = __f.name, .type = __f.type, .default_value_ptr = null, .is_comptime = false, .alignment = __f.alignment };
}
break :blk @Type(.{ .@"struct" = .{ .layout = .auto, .fields = &__fields, .decls = &.{}, .is_tuple = false } });
};
var a: __KoruCaptureT_a = .{ .c = @as(i64, 0), .m = @as(i64, 0), .st = @as(i64, 0) };
_ = &a;
for (line) |__koru_item6| {
{ const ch = __koru_item6; _ = &ch; a.c = a.c + 1;
if (a.st == 0) {
{ a.st = 1;
}
} else {
{
if (a.st == 2) {
{ { const __koru_switch_value_16_13: u8 = ch; switch (__koru_switch_value_16_13) { 'x' => { const _auto_7 = __koru_switch_value_16_13; _ = &_auto_7; a.st = 3;
}, else => { {
const __koru_asgn_0 = a.m + 1;
const __koru_asgn_1 = 1;
a.m = __koru_asgn_0;
a.st = __koru_asgn_1;
}
}, } }
}
} else {
{
if (a.st == 3) {
{ a.st = 4;
}
} else {
{
if (a.st == 4) {
{ {
const __koru_asgn_0 = a.m + 1;
const __koru_asgn_1 = 1;
a.m = __koru_asgn_0;
a.st = __koru_asgn_1;
}
}
} else {
{ { const __koru_switch_value_23_21: u8 = ch; switch (__koru_switch_value_23_21) { '\\' => { const _auto_8 = __koru_switch_value_23_21; _ = &_auto_8; a.st = 2;
}, '"' => { const _auto_9 = __koru_switch_value_23_21; _ = &_auto_9; a.st = 5;
}, else => { a.m = a.m + 1;
}, } }
}
}
}
}
}
}
}
}
}
}
{ }
const r = a;
return .{ .c = r.c, .m = r.m };
}
};
// >>> FLOW: tests/regression/600_STDLIB/645_SWITCH/645_004_day08_switch/input.k:29 ~std.control:capture()
pub fn flow0() void {
const __KoruCaptureT_acc = comptime blk: {
const __info = @typeInfo(@TypeOf(.{ .diff = @as(i64, 0) }));
var __fields: [__info.@"struct".fields.len]@import("std").builtin.Type.StructField = undefined;
for (__info.@"struct".fields, 0..) |__f, __i| {
__fields[__i] = .{ .name = __f.name, .type = __f.type, .default_value_ptr = null, .is_comptime = false, .alignment = __f.alignment };
}
break :blk @Type(.{ .@"struct" = .{ .layout = .auto, .fields = &__fields, .decls = &.{}, .is_tuple = false } });
};
var acc: __KoruCaptureT_acc = .{ .diff = @as(i64, 0) };
_ = &acc;
const result_0: koru_std.koru_fs.read_lines_event.Output = __koru_proc_0: {
const path = ("tests/regression/600_STDLIB/645_SWITCH/645_004_day08_switch/input.txt"); _ = &path;
const __koru_rl_file = @import("std").fs.cwd().openFile(path, .{}) catch |err| {
const __koru_rl_msg = switch (err) {
error.FileNotFound => "File not found",
error.AccessDenied => "Access denied",
error.IsDir => "Path is a directory",
else => "Failed to open file",
};
break :__koru_proc_0 .{ .failed = __koru_rl_msg };
};
defer __koru_rl_file.close();
// No artificial cap: read the whole file, bounded only by real memory.
// An over-RAM file fails LOUDLY as OutOfMemory rather than silently at an
// arbitrary limit. (`read-lines` should ultimately stream line-by-line for
// constant memory on >RAM inputs; that's a separate capability, not this
// bug — the bug was the silent 10MB cap.)
// One stat + one alloc + one readAll — readToEndAlloc's chunked growth
// copies the file ~3x and triples peak RSS on large inputs.
const __koru_rl_size = (__koru_rl_file.stat() catch break :__koru_proc_0 .{ .failed = "Failed to stat file" }).size;
const __koru_rl_content = koru_allocator().alloc(u8, __koru_rl_size) catch break :__koru_proc_0 .{ .failed = "Out of memory reading file" };
const __koru_rl_got = __koru_rl_file.readAll(__koru_rl_content) catch { koru_allocator().free(__koru_rl_content); break :__koru_proc_0 .{ .failed = "Failed to read file" }; };
if (__koru_rl_got != __koru_rl_size) { koru_allocator().free(__koru_rl_content); break :__koru_proc_0 .{ .failed = "File changed during read" }; }
defer koru_allocator().free(__koru_rl_content);
// HYGIENE: this body INLINES into the consumer's frame (effect
// lowering), so locals are __koru-prefixed to never collide with
// user bindings in the surrounding flow.
var __koru_rl_n: usize = 0;
var __koru_rl_it = @import("std").mem.splitScalar(u8, __koru_rl_content, '\n');
while (__koru_rl_it.next()) |__koru_rl_raw| {
// A trailing newline yields one final empty slice - not a line.
if (__koru_rl_raw.len == 0 and __koru_rl_it.peek() == null) break;
const __koru_rl_l = if (__koru_rl_raw.len > 0 and __koru_rl_raw[__koru_rl_raw.len - 1] == '\r') __koru_rl_raw[0 .. __koru_rl_raw.len - 1] else __koru_rl_raw;
{ const l = __koru_rl_l; _ = &l; const counted = main_module.measure_event.handler(.{ .line = l });
_ = &counted;
acc.diff = acc.diff + counted.c - counted.m;
}
__koru_rl_n += 1;
}
break :__koru_proc_0 .{ .done = __koru_rl_n };
};
_ = &result_0;
switch (result_0) {
// >>> BRANCH: tests/regression/600_STDLIB/645_SWITCH/645_004_day08_switch/input.k:32 | done _auto_12 |>
.done => |_| {
},
// >>> BRANCH: tests/regression/600_STDLIB/645_SWITCH/645_004_day08_switch/input.k:33 | failed e |>
.failed => |e| {
(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("FAILED {s}\n", .{e});
},
}
const total = acc;
(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("{d}\n", .{total.diff});
}
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 koru_std = struct {
pub const koru_fs = struct {
const std = @import("std");
pub const Dir = struct { root: std.fs.Dir };
fn __koru_fenced(path: []const u8) bool {
if (path.len == 0 or std.fs.path.isAbsolute(path)) return true;
var it = std.mem.splitScalar(u8, path, '/');
while (it.next()) |seg| {
if (std.mem.eql(u8, seg, "..")) return true;
}
return false;
}
fn __koru_lt(_: void, a: []const u8, b: []const u8) bool {
return std.mem.order(u8, a, b) == .lt;
}
pub const read_lines_event = struct {
pub const Input = struct {
path: []const u8,
};
pub const Output = union(enum(u8)) {
done: usize,
failed: []const u8,
};
pub fn handler(__koru_event_input: @This().Input, comptime __H: type) @This().Output {
const line = __H.line;
_ = &line;
// >>> PROC: read_lines [/Users/larsde/src/koru/koru_std/fs.kz:32]
const path = __koru_event_input.path;
_ = &path;
_ = &__koru_event_input;
const __koru_rl_file = std.fs.cwd().openFile(path, .{}) catch |err| {
const __koru_rl_msg = switch (err) {
error.FileNotFound => "File not found",
error.AccessDenied => "Access denied",
error.IsDir => "Path is a directory",
else => "Failed to open file",
};
return .{ .failed = __koru_rl_msg };
};
defer __koru_rl_file.close();
// No artificial cap: read the whole file, bounded only by real memory.
// An over-RAM file fails LOUDLY as OutOfMemory rather than silently at an
// arbitrary limit. (`read-lines` should ultimately stream line-by-line for
// constant memory on >RAM inputs; that's a separate capability, not this
// bug — the bug was the silent 10MB cap.)
// One stat + one alloc + one readAll — readToEndAlloc's chunked growth
// copies the file ~3x and triples peak RSS on large inputs.
const __koru_rl_size = (__koru_rl_file.stat() catch return .{ .failed = "Failed to stat file" }).size;
const __koru_rl_content = koru_allocator().alloc(u8, __koru_rl_size) catch return .{ .failed = "Out of memory reading file" };
const __koru_rl_got = __koru_rl_file.readAll(__koru_rl_content) catch { koru_allocator().free(__koru_rl_content); return .{ .failed = "Failed to read file" }; };
if (__koru_rl_got != __koru_rl_size) { koru_allocator().free(__koru_rl_content); return .{ .failed = "File changed during read" }; }
defer koru_allocator().free(__koru_rl_content);
// HYGIENE: this body INLINES into the consumer's frame (effect
// lowering), so locals are __koru-prefixed to never collide with
// user bindings in the surrounding flow.
var __koru_rl_n: usize = 0;
var __koru_rl_it = std.mem.splitScalar(u8, __koru_rl_content, '\n');
while (__koru_rl_it.next()) |__koru_rl_raw| {
// A trailing newline yields one final empty slice - not a line.
if (__koru_rl_raw.len == 0 and __koru_rl_it.peek() == null) break;
const __koru_rl_l = if (__koru_rl_raw.len > 0 and __koru_rl_raw[__koru_rl_raw.len - 1] == '\r') __koru_rl_raw[0 .. __koru_rl_raw.len - 1] else __koru_rl_raw;
line(__koru_rl_l);
__koru_rl_n += 1;
}
return .{ .done = __koru_rl_n };
}
};
};
};
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
... [truncated - 20KB total]Flows
subflow ~measure click a branch to expand · @labels scroll to their anchor
capture (source: c: 0[i64], m: 0[i64], st: 0[i64])
flow ~capture click a branch to expand · @labels scroll to their anchor
capture (source: diff: 0[i64])
Test Configuration
MUST_RUN LANGUAGES: zig cs