@@ -1,953 +0,0 @@
const std = @import("std");
const Cases = @import("src/Cases.zig");
const nl = if (@import("builtin").os.tag == .windows) "\r\n" else "\n";
pub fn addCases(ctx: *Cases, b: *std.Build) !void {
// These tests should work with all platforms, but we're using linux_x64 for
// now for consistency. Will be expanded eventually.
const linux_x64: std.Target.Query = .{
.cpu_arch = .x86_64,
.os_tag = .linux,
};
{
var case = ctx.exeFromCompiledC("hello world with updates", .{}, b);
// Regular old hello world
case.addCompareOutput(
\\extern fn puts(s: [*:0]const u8) c_int;
\\pub export fn main() c_int {
\\ _ = puts("hello world!");
\\ return 0;
\\}
, "hello world!" ++ nl);
// Now change the message only
case.addCompareOutput(
\\extern fn puts(s: [*:0]const u8) c_int;
\\pub export fn main() c_int {
\\ _ = puts("yo");
\\ return 0;
\\}
, "yo" ++ nl);
// Add an unused Decl
case.addCompareOutput(
\\extern fn puts(s: [*:0]const u8) c_int;
\\pub export fn main() c_int {
\\ _ = puts("yo!");
\\ return 0;
\\}
\\fn unused() void {}
, "yo!" ++ nl);
// Comptime return type and calling convention expected.
case.addError(
\\var x: i32 = 1234;
\\pub export fn main() x {
\\ return 0;
\\}
\\export fn foo() callconv(y) c_int {
\\ return 0;
\\}
\\var y: @import("std").builtin.CallingConvention = .C;
, &.{
":2:22: error: expected type 'type', found 'i32'",
":5:26: error: unable to resolve comptime value",
":5:26: note: calling convention must be comptime-known",
});
}
{
var case = ctx.exeFromCompiledC("var args", .{}, b);
case.addCompareOutput(
\\extern fn printf(format: [*:0]const u8, ...) c_int;
\\
\\pub export fn main() c_int {
\\ _ = printf("Hello, %s!\n", "world");
\\ return 0;
\\}
, "Hello, world!" ++ nl);
}
{
var case = ctx.exeFromCompiledC("errorFromInt", .{}, b);
case.addCompareOutput(
\\pub export fn main() c_int {
\\ // comptime checks
\\ const a = error.A;
\\ const b = error.B;
\\ const c = @errorFromInt(2);
\\ const d = @errorFromInt(1);
\\ if (!(c == b)) unreachable;
\\ if (!(a == d)) unreachable;
\\ // runtime checks
\\ var x = error.A;
\\ var y = error.B;
\\ var z = @errorFromInt(2);
\\ var f = @errorFromInt(1);
\\ if (!(y == z)) unreachable;
\\ if (!(x == f)) unreachable;
\\ return 0;
\\}
, "");
case.addError(
\\pub export fn main() c_int {
\\ _ = @errorFromInt(0);
\\ return 0;
\\}
, &.{":2:21: error: integer value '0' represents no error"});
case.addError(
\\pub export fn main() c_int {
\\ _ = @errorFromInt(3);
\\ return 0;
\\}
, &.{":2:21: error: integer value '3' represents no error"});
}
{
var case = ctx.exeFromCompiledC("x86_64-linux inline assembly", linux_x64, b);
// Exit with 0
case.addCompareOutput(
\\fn exitGood() noreturn {
\\ asm volatile ("syscall"
\\ :
\\ : [number] "{rax}" (231),
\\ [arg1] "{rdi}" (0)
\\ );
\\ unreachable;
\\}
\\
\\pub export fn main() c_int {
\\ exitGood();
\\}
, "");
// Pass a usize parameter to exit
case.addCompareOutput(
\\pub export fn main() c_int {
\\ exit(0);
\\}
\\
\\fn exit(code: usize) noreturn {
\\ asm volatile ("syscall"
\\ :
\\ : [number] "{rax}" (231),
\\ [arg1] "{rdi}" (code)
\\ );
\\ unreachable;
\\}
, "");
// Change the parameter to u8
case.addCompareOutput(
\\pub export fn main() c_int {
\\ exit(0);
\\}
\\
\\fn exit(code: u8) noreturn {
\\ asm volatile ("syscall"
\\ :
\\ : [number] "{rax}" (231),
\\ [arg1] "{rdi}" (code)
\\ );
\\ unreachable;
\\}
, "");
// Do some arithmetic at the exit callsite
case.addCompareOutput(
\\pub export fn main() c_int {
\\ exitMath(1);
\\}
\\
\\fn exitMath(a: u8) noreturn {
\\ exit(0 + a - a);
\\}
\\
\\fn exit(code: u8) noreturn {
\\ asm volatile ("syscall"
\\ :
\\ : [number] "{rax}" (231),
\\ [arg1] "{rdi}" (code)
\\ );
\\ unreachable;
\\}
\\
, "");
// Invert the arithmetic
case.addCompareOutput(
\\pub export fn main() c_int {
\\ exitMath(1);
\\}
\\
\\fn exitMath(a: u8) noreturn {
\\ exit(a + 0 - a);
\\}
\\
\\fn exit(code: u8) noreturn {
\\ asm volatile ("syscall"
\\ :
\\ : [number] "{rax}" (231),
\\ [arg1] "{rdi}" (code)
\\ );
\\ unreachable;
\\}
\\
, "");
}
{
var case = ctx.exeFromCompiledC("alloc and retptr", .{}, b);
case.addCompareOutput(
\\fn add(a: i32, b: i32) i32 {
\\ return a + b;
\\}
\\
\\fn addIndirect(a: i32, b: i32) i32 {
\\ return add(a, b);
\\}
\\
\\pub export fn main() c_int {
\\ return addIndirect(1, 2) - 3;
\\}
, "");
}
{
var case = ctx.exeFromCompiledC("inferred local const and var", .{}, b);
case.addCompareOutput(
\\fn add(a: i32, b: i32) i32 {
\\ return a + b;
\\}
\\
\\pub export fn main() c_int {
\\ const x = add(1, 2);
\\ var y = add(3, 0);
\\ y -= x;
\\ return y;
\\}
, "");
}
{
var case = ctx.exeFromCompiledC("control flow", .{}, b);
// Simple while loop
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var a: c_int = 0;
\\ while (a < 5) : (a+=1) {}
\\ return a - 5;
\\}
, "");
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var a = true;
\\ while (!a) {}
\\ return 0;
\\}
, "");
// If expression
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var cond: c_int = 0;
\\ var a: c_int = @as(c_int, if (cond == 0)
\\ 2
\\ else
\\ 3) + 9;
\\ return a - 11;
\\}
, "");
// If expression with breakpoint that does not get hit
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var x: i32 = 1;
\\ if (x != 1) @breakpoint();
\\ return 0;
\\}
, "");
// Switch expression
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var cond: c_int = 0;
\\ var a: c_int = switch (cond) {
\\ 1 => 1,
\\ 2 => 2,
\\ 99...300, 12 => 3,
\\ 0 => 4,
\\ else => 5,
\\ };
\\ return a - 4;
\\}
, "");
// Switch expression missing else case.
case.addError(
\\pub export fn main() c_int {
\\ var cond: c_int = 0;
\\ const a: c_int = switch (cond) {
\\ 1 => 1,
\\ 2 => 2,
\\ 3 => 3,
\\ 4 => 4,
\\ };
\\ return a - 4;
\\}
, &.{":3:22: error: switch must handle all possibilities"});
// Switch expression, has an unreachable prong.
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var cond: c_int = 0;
\\ const a: c_int = switch (cond) {
\\ 1 => 1,
\\ 2 => 2,
\\ 99...300, 12 => 3,
\\ 0 => 4,
\\ 13 => unreachable,
\\ else => 5,
\\ };
\\ return a - 4;
\\}
, "");
// Switch expression, has an unreachable prong and prongs write
// to result locations.
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var cond: c_int = 0;
\\ var a: c_int = switch (cond) {
\\ 1 => 1,
\\ 2 => 2,
\\ 99...300, 12 => 3,
\\ 0 => 4,
\\ 13 => unreachable,
\\ else => 5,
\\ };
\\ return a - 4;
\\}
, "");
// Integer switch expression has duplicate case value.
case.addError(
\\pub export fn main() c_int {
\\ var cond: c_int = 0;
\\ const a: c_int = switch (cond) {
\\ 1 => 1,
\\ 2 => 2,
\\ 96, 11...13, 97 => 3,
\\ 0 => 4,
\\ 90, 12 => 100,
\\ else => 5,
\\ };
\\ return a - 4;
\\}
, &.{
":8:13: error: duplicate switch value",
":6:15: note: previous value here",
});
// Boolean switch expression has duplicate case value.
case.addError(
\\pub export fn main() c_int {
\\ var a: bool = false;
\\ const b: c_int = switch (a) {
\\ false => 1,
\\ true => 2,
\\ false => 3,
\\ };
\\ _ = b;
\\}
, &.{
":6:9: error: duplicate switch value",
});
// Sparse (no range capable) switch expression has duplicate case value.
case.addError(
\\pub export fn main() c_int {
\\ const A: type = i32;
\\ const b: c_int = switch (A) {
\\ i32 => 1,
\\ bool => 2,
\\ f64, i32 => 3,
\\ else => 4,
\\ };
\\ _ = b;
\\}
, &.{
":6:14: error: duplicate switch value",
":4:9: note: previous value here",
});
// Ranges not allowed for some kinds of switches.
case.addError(
\\pub export fn main() c_int {
\\ const A: type = i32;
\\ const b: c_int = switch (A) {
\\ i32 => 1,
\\ bool => 2,
\\ f16...f64 => 3,
\\ else => 4,
\\ };
\\ _ = b;
\\}
, &.{
":3:30: error: ranges not allowed when switching on type 'type'",
":6:12: note: range here",
});
// Switch expression has unreachable else prong.
case.addError(
\\pub export fn main() c_int {
\\ var a: u2 = 0;
\\ const b: i32 = switch (a) {
\\ 0 => 10,
\\ 1 => 20,
\\ 2 => 30,
\\ 3 => 40,
\\ else => 50,
\\ };
\\ _ = b;
\\}
, &.{
":8:14: error: unreachable else prong; all cases already handled",
});
}
//{
// var case = ctx.exeFromCompiledC("optionals", .{}, b);
// // Simple while loop
// case.addCompareOutput(
// \\pub export fn main() c_int {
// \\ var count: c_int = 0;
// \\ var opt_ptr: ?*c_int = &count;
// \\ while (opt_ptr) |_| : (count += 1) {
// \\ if (count == 4) opt_ptr = null;
// \\ }
// \\ return count - 5;
// \\}
// , "");
// // Same with non pointer optionals
// case.addCompareOutput(
// \\pub export fn main() c_int {
// \\ var count: c_int = 0;
// \\ var opt_ptr: ?c_int = count;
// \\ while (opt_ptr) |_| : (count += 1) {
// \\ if (count == 4) opt_ptr = null;
// \\ }
// \\ return count - 5;
// \\}
// , "");
//}
{
var case = ctx.exeFromCompiledC("errors", .{}, b);
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var e1 = error.Foo;
\\ var e2 = error.Bar;
\\ assert(e1 != e2);
\\ assert(e1 == error.Foo);
\\ assert(e2 == error.Bar);
\\ return 0;
\\}
\\fn assert(b: bool) void {
\\ if (!b) unreachable;
\\}
, "");
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var e: anyerror!c_int = 0;
\\ const i = e catch 69;
\\ return i;
\\}
, "");
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var e: anyerror!c_int = error.Foo;
\\ const i = e catch 69;
\\ return 69 - i;
\\}
, "");
case.addCompareOutput(
\\const E = error{e};
\\const S = struct { x: u32 };
\\fn f() E!u32 {
\\ const x = (try @as(E!S, S{ .x = 1 })).x;
\\ return x;
\\}
\\pub export fn main() c_int {
\\ const x = f() catch @as(u32, 0);
\\ if (x != 1) unreachable;
\\ return 0;
\\}
, "");
}
{
var case = ctx.exeFromCompiledC("structs", .{}, b);
case.addError(
\\const Point = struct { x: i32, y: i32 };
\\pub export fn main() c_int {
\\ var p: Point = .{
\\ .y = 24,
\\ .x = 12,
\\ .y = 24,
\\ };
\\ return p.y - p.x - p.x;
\\}
, &.{
":4:10: error: duplicate struct field name",
":6:10: note: duplicate name here",
":3:21: note: struct declared here",
});
case.addError(
\\const Point = struct { x: i32, y: i32 };
\\pub export fn main() c_int {
\\ var p: Point = .{
\\ .y = 24,
\\ };
\\ return p.y - p.x - p.x;
\\}
, &.{
":3:21: error: missing struct field: x",
":1:15: note: struct 'tmp.Point' declared here",
});
case.addError(
\\const Point = struct { x: i32, y: i32 };
\\pub export fn main() c_int {
\\ var p: Point = .{
\\ .x = 12,
\\ .y = 24,
\\ .z = 48,
\\ };
\\ return p.y - p.x - p.x;
\\}
, &.{
":6:10: error: no field named 'z' in struct 'tmp.Point'",
":1:15: note: struct declared here",
});
case.addCompareOutput(
\\const Point = struct { x: i32, y: i32 };
\\pub export fn main() c_int {
\\ var p: Point = .{
\\ .x = 12,
\\ .y = 24,
\\ };
\\ return p.y - p.x - p.x;
\\}
, "");
case.addCompareOutput(
\\const Point = struct { x: i32, y: i32, z: i32, a: i32, b: i32 };
\\pub export fn main() c_int {
\\ var p: Point = .{
\\ .x = 18,
\\ .y = 24,
\\ .z = 1,
\\ .a = 2,
\\ .b = 3,
\\ };
\\ return p.y - p.x - p.z - p.a - p.b;
\\}
, "");
}
{
var case = ctx.exeFromCompiledC("unions", .{}, b);
case.addError(
\\const U = union {
\\ a: u32,
\\ b
\\};
, &.{
":3:5: error: union field missing type",
});
case.addError(
\\const E = enum { a, b };
\\const U = union(E) {
\\ a: u32 = 1,
\\ b: f32 = 2,
\\};
, &.{
":2:11: error: explicitly valued tagged union requires inferred enum tag type",
":3:14: note: tag value specified here",
});
case.addError(
\\const U = union(enum) {
\\ a: u32 = 1,
\\ b: f32 = 2,
\\};
, &.{
":1:11: error: explicitly valued tagged union missing integer tag type",
":2:14: note: tag value specified here",
});
}
{
var case = ctx.exeFromCompiledC("enums", .{}, b);
case.addError(
\\const E1 = packed enum { a, b, c };
\\const E2 = extern enum { a, b, c };
\\export fn foo() void {
\\ _ = E1.a;
\\}
\\export fn bar() void {
\\ _ = E2.a;
\\}
, &.{
":1:12: error: enums do not support 'packed' or 'extern'; instead provide an explicit integer tag type",
":2:12: error: enums do not support 'packed' or 'extern'; instead provide an explicit integer tag type",
});
// comptime and types are caught in AstGen.
case.addError(
\\const E1 = enum {
\\ a,
\\ comptime b,
\\ c,
\\};
\\const E2 = enum {
\\ a,
\\ b: i32,
\\ c,
\\};
\\export fn foo() void {
\\ _ = E1.a;
\\}
\\export fn bar() void {
\\ _ = E2.a;
\\}
, &.{
":3:5: error: enum fields cannot be marked comptime",
":8:8: error: enum fields do not have types",
":6:12: note: consider 'union(enum)' here to make it a tagged union",
});
// @intFromEnum, @enumFromInt, enum literal coercion, field access syntax, comparison, switch
case.addCompareOutput(
\\const Number = enum { One, Two, Three };
\\
\\pub export fn main() c_int {
\\ var number1 = Number.One;
\\ var number2: Number = .Two;
\\ const number3: Number = @enumFromInt(2);
\\ if (number1 == number2) return 1;
\\ if (number2 == number3) return 1;
\\ if (@intFromEnum(number1) != 0) return 1;
\\ if (@intFromEnum(number2) != 1) return 1;
\\ if (@intFromEnum(number3) != 2) return 1;
\\ var x: Number = .Two;
\\ if (number2 != x) return 1;
\\ switch (x) {
\\ .One => return 1,
\\ .Two => return 0,
\\ number3 => return 2,
\\ }
\\}
, "");
// Specifying alignment is a parse error.
// This also tests going from a successful build to a parse error.
case.addError(
\\const E1 = enum {
\\ a,
\\ b align(4),
\\ c,
\\};
\\export fn foo() void {
\\ _ = E1.a;
\\}
, &.{
":3:13: error: enum fields cannot be aligned",
});
// Redundant non-exhaustive enum mark.
// This also tests going from a parse error to an AstGen error.
case.addError(
\\const E1 = enum {
\\ a,
\\ _,
\\ b,
\\ c,
\\ _,
\\};
\\export fn foo() void {
\\ _ = E1.a;
\\}
, &.{
":6:5: error: redundant non-exhaustive enum mark",
":3:5: note: other mark here",
});
case.addError(
\\const E1 = enum {
\\ a,
\\ b,
\\ c,
\\ _ = 10,
\\};
\\export fn foo() void {
\\ _ = E1.a;
\\}
, &.{
":5:9: error: '_' is used to mark an enum as non-exhaustive and cannot be assigned a value",
});
case.addError(
\\const E1 = enum { a, b, _ };
\\export fn foo() void {
\\ _ = E1.a;
\\}
, &.{
":1:12: error: non-exhaustive enum missing integer tag type",
":1:25: note: marked non-exhaustive here",
});
case.addError(
\\const E1 = enum { a, b, c, b, d };
\\pub export fn main() c_int {
\\ _ = E1.a;
\\}
, &.{
":1:22: error: duplicate enum field name",
":1:28: note: duplicate field here",
":1:12: note: enum declared here",
});
case.addError(
\\pub export fn main() c_int {
\\ const a = true;
\\ _ = @intFromEnum(a);
\\}
, &.{
":3:20: error: expected enum or tagged union, found 'bool'",
});
case.addError(
\\pub export fn main() c_int {
\\ const a = 1;
\\ _ = @as(bool, @enumFromInt(a));
\\}
, &.{
":3:19: error: expected enum, found 'bool'",
});
case.addError(
\\const E = enum { a, b, c };
\\pub export fn main() c_int {
\\ _ = @as(E, @enumFromInt(3));
\\}
, &.{
":3:16: error: enum 'tmp.E' has no tag with value '3'",
":1:11: note: enum declared here",
});
case.addError(
\\const E = enum { a, b, c };
\\pub export fn main() c_int {
\\ var x: E = .a;
\\ switch (x) {
\\ .a => {},
\\ .c => {},
\\ }
\\}
, &.{
":4:5: error: switch must handle all possibilities",
":1:21: note: unhandled enumeration value: 'b'",
":1:11: note: enum 'tmp.E' declared here",
});
case.addError(
\\const E = enum { a, b, c };
\\pub export fn main() c_int {
\\ var x: E = .a;
\\ switch (x) {
\\ .a => {},
\\ .b => {},
\\ .b => {},
\\ .c => {},
\\ }
\\}
, &.{
":7:10: error: duplicate switch value",
":6:10: note: previous value here",
});
case.addError(
\\const E = enum { a, b, c };
\\pub export fn main() c_int {
\\ var x: E = .a;
\\ switch (x) {
\\ .a => {},
\\ .b => {},
\\ .c => {},
\\ else => {},
\\ }
\\}
, &.{
":8:14: error: unreachable else prong; all cases already handled",
});
case.addError(
\\const E = enum { a, b, c };
\\pub export fn main() c_int {
\\ var x: E = .a;
\\ switch (x) {
\\ .a => {},
\\ .b => {},
\\ _ => {},
\\ }
\\}
, &.{
":4:5: error: '_' prong only allowed when switching on non-exhaustive enums",
":7:11: note: '_' prong here",
});
case.addError(
\\const E = enum { a, b, c };
\\pub export fn main() c_int {
\\ _ = E.d;
\\}
, &.{
":3:11: error: enum 'tmp.E' has no member named 'd'",
":1:11: note: enum declared here",
});
case.addError(
\\const E = enum { a, b, c };
\\pub export fn main() c_int {
\\ var x: E = .d;
\\ _ = x;
\\}
, &.{
":3:17: error: no field named 'd' in enum 'tmp.E'",
":1:11: note: enum declared here",
});
}
{
var case = ctx.exeFromCompiledC("shift right and left", .{}, b);
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var i: u32 = 16;
\\ assert(i >> 1, 8);
\\ return 0;
\\}
\\fn assert(a: u32, b: u32) void {
\\ if (a != b) unreachable;
\\}
, "");
case.addCompareOutput(
\\pub export fn main() c_int {
\\ var i: u32 = 16;
\\ assert(i << 1, 32);
\\ return 0;
\\}
\\fn assert(a: u32, b: u32) void {
\\ if (a != b) unreachable;
\\}
, "");
}
{
var case = ctx.exeFromCompiledC("inferred error sets", .{}, b);
case.addCompareOutput(
\\pub export fn main() c_int {
\\ if (foo()) |_| {
\\ @panic("test fail");
\\ } else |err| {
\\ if (err != error.ItBroke) {
\\ @panic("test fail");
\\ }
\\ }
\\ return 0;
\\}
\\fn foo() !void {
\\ return error.ItBroke;
\\}
, "");
}
{
// TODO: add u64 tests, ran into issues with the literal generated for std.math.maxInt(u64)
var case = ctx.exeFromCompiledC("add and sub wrapping operations", .{}, b);
case.addCompareOutput(
\\pub export fn main() c_int {
\\ // Addition
\\ if (!add_u3(1, 1, 2)) return 1;
\\ if (!add_u3(7, 1, 0)) return 1;
\\ if (!add_i3(1, 1, 2)) return 1;
\\ if (!add_i3(3, 2, -3)) return 1;
\\ if (!add_i3(-3, -2, 3)) return 1;
\\ if (!add_c_int(1, 1, 2)) return 1;
\\ // TODO enable these when stage2 supports std.math.maxInt
\\ //if (!add_c_int(maxInt(c_int), 2, minInt(c_int) + 1)) return 1;
\\ //if (!add_c_int(maxInt(c_int) + 1, -2, maxInt(c_int))) return 1;
\\
\\ // Subtraction
\\ if (!sub_u3(2, 1, 1)) return 1;
\\ if (!sub_u3(0, 1, 7)) return 1;
\\ if (!sub_i3(2, 1, 1)) return 1;
\\ if (!sub_i3(3, -2, -3)) return 1;
\\ if (!sub_i3(-3, 2, 3)) return 1;
\\ if (!sub_c_int(2, 1, 1)) return 1;
\\ // TODO enable these when stage2 supports std.math.maxInt
\\ //if (!sub_c_int(maxInt(c_int), -2, minInt(c_int) + 1)) return 1;
\\ //if (!sub_c_int(minInt(c_int) + 1, 2, maxInt(c_int))) return 1;
\\
\\ return 0;
\\}
\\fn add_u3(lhs: u3, rhs: u3, expected: u3) bool {
\\ return expected == lhs +% rhs;
\\}
\\fn add_i3(lhs: i3, rhs: i3, expected: i3) bool {
\\ return expected == lhs +% rhs;
\\}
\\fn add_c_int(lhs: c_int, rhs: c_int, expected: c_int) bool {
\\ return expected == lhs +% rhs;
\\}
\\fn sub_u3(lhs: u3, rhs: u3, expected: u3) bool {
\\ return expected == lhs -% rhs;
\\}
\\fn sub_i3(lhs: i3, rhs: i3, expected: i3) bool {
\\ return expected == lhs -% rhs;
\\}
\\fn sub_c_int(lhs: c_int, rhs: c_int, expected: c_int) bool {
\\ return expected == lhs -% rhs;
\\}
, "");
}
{
var case = ctx.exeFromCompiledC("rem", linux_x64, b);
case.addCompareOutput(
\\fn assert(ok: bool) void {
\\ if (!ok) unreachable;
\\}
\\fn rem(lhs: i32, rhs: i32, expected: i32) bool {
\\ return @rem(lhs, rhs) == expected;
\\}
\\pub export fn main() c_int {
\\ assert(rem(-5, 3, -2));
\\ assert(rem(5, 3, 2));
\\ return 0;
\\}
, "");
}
}