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zig/test/behavior/cast.zig
Veikka Tuominen 58c1d98c14 add tests for fixed stage1 bugs 
Closes #4144
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2022-12-31 20:49:02 -05:00

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const builtin = @import("builtin");
const std = @import("std");
const expect = std.testing.expect;
const mem = std.mem;
const maxInt = std.math.maxInt;
const native_endian = builtin.target.cpu.arch.endian();
test "int to ptr cast" {
const x = @as(usize, 13);
const y = @intToPtr(*u8, x);
const z = @ptrToInt(y);
try expect(z == 13);
}
test "integer literal to pointer cast" {
const vga_mem = @intToPtr(*u16, 0xB8000);
try expect(@ptrToInt(vga_mem) == 0xB8000);
}
test "peer type resolution: ?T and T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try expect(peerTypeTAndOptionalT(true, false).? == 0);
try expect(peerTypeTAndOptionalT(false, false).? == 3);
comptime {
try expect(peerTypeTAndOptionalT(true, false).? == 0);
try expect(peerTypeTAndOptionalT(false, false).? == 3);
}
}
fn peerTypeTAndOptionalT(c: bool, b: bool) ?usize {
if (c) {
return if (b) null else @as(usize, 0);
}
return @as(usize, 3);
}
test "resolve undefined with integer" {
try testResolveUndefWithInt(true, 1234);
comptime try testResolveUndefWithInt(true, 1234);
}
fn testResolveUndefWithInt(b: bool, x: i32) !void {
const value = if (b) x else undefined;
if (b) {
try expect(value == x);
}
}
test "@intCast to comptime_int" {
try expect(@intCast(comptime_int, 0) == 0);
}
test "implicit cast comptime numbers to any type when the value fits" {
const a: u64 = 255;
var b: u8 = a;
try expect(b == 255);
}
test "implicit cast comptime_int to comptime_float" {
comptime try expect(@as(comptime_float, 10) == @as(f32, 10));
try expect(2 == 2.0);
}
test "comptime_int @intToFloat" {
{
const result = @intToFloat(f16, 1234);
try expect(@TypeOf(result) == f16);
try expect(result == 1234.0);
}
{
const result = @intToFloat(f32, 1234);
try expect(@TypeOf(result) == f32);
try expect(result == 1234.0);
}
{
const result = @intToFloat(f64, 1234);
try expect(@TypeOf(result) == f64);
try expect(result == 1234.0);
}
{
const result = @intToFloat(f128, 1234);
try expect(@TypeOf(result) == f128);
try expect(result == 1234.0);
}
// big comptime_int (> 64 bits) to f128 conversion
{
const result = @intToFloat(f128, 0x1_0000_0000_0000_0000);
try expect(@TypeOf(result) == f128);
try expect(result == 0x1_0000_0000_0000_0000.0);
}
}
test "@intToFloat" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
try testIntToFloat(-2);
}
fn testIntToFloat(k: i32) !void {
const f = @intToFloat(f32, k);
const i = @floatToInt(i32, f);
try expect(i == k);
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "@intToFloat(f80)" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest(comptime Int: type) !void {
try testIntToFloat(Int, -2);
}
fn testIntToFloat(comptime Int: type, k: Int) !void {
@setRuntimeSafety(false); // TODO
const f = @intToFloat(f80, k);
const i = @floatToInt(Int, f);
try expect(i == k);
}
};
try S.doTheTest(i31);
try S.doTheTest(i32);
try S.doTheTest(i45);
try S.doTheTest(i64);
try S.doTheTest(i80);
try S.doTheTest(i128);
// try S.doTheTest(i256); // TODO missing compiler_rt symbols
comptime try S.doTheTest(i31);
comptime try S.doTheTest(i32);
comptime try S.doTheTest(i45);
comptime try S.doTheTest(i64);
comptime try S.doTheTest(i80);
comptime try S.doTheTest(i128);
comptime try S.doTheTest(i256);
}
test "@floatToInt" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try testFloatToInts();
comptime try testFloatToInts();
}
fn testFloatToInts() !void {
const x = @as(i32, 1e4);
try expect(x == 10000);
const y = @floatToInt(i32, @as(f32, 1e4));
try expect(y == 10000);
try expectFloatToInt(f32, 255.1, u8, 255);
try expectFloatToInt(f32, 127.2, i8, 127);
try expectFloatToInt(f32, -128.2, i8, -128);
}
fn expectFloatToInt(comptime F: type, f: F, comptime I: type, i: I) !void {
try expect(@floatToInt(I, f) == i);
}
test "implicitly cast indirect pointer to maybe-indirect pointer" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_x86_64 or builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
const Self = @This();
x: u8,
fn constConst(p: *const *const Self) u8 {
return p.*.x;
}
fn maybeConstConst(p: ?*const *const Self) u8 {
return p.?.*.x;
}
fn constConstConst(p: *const *const *const Self) u8 {
return p.*.*.x;
}
fn maybeConstConstConst(p: ?*const *const *const Self) u8 {
return p.?.*.*.x;
}
};
const s = S{ .x = 42 };
const p = &s;
const q = &p;
const r = &q;
try expect(42 == S.constConst(q));
try expect(42 == S.maybeConstConst(q));
try expect(42 == S.constConstConst(r));
try expect(42 == S.maybeConstConstConst(r));
}
test "@intCast comptime_int" {
const result = @intCast(i32, 1234);
try expect(@TypeOf(result) == i32);
try expect(result == 1234);
}
test "@floatCast comptime_int and comptime_float" {
{
const result = @floatCast(f16, 1234);
try expect(@TypeOf(result) == f16);
try expect(result == 1234.0);
}
{
const result = @floatCast(f16, 1234.0);
try expect(@TypeOf(result) == f16);
try expect(result == 1234.0);
}
{
const result = @floatCast(f32, 1234);
try expect(@TypeOf(result) == f32);
try expect(result == 1234.0);
}
{
const result = @floatCast(f32, 1234.0);
try expect(@TypeOf(result) == f32);
try expect(result == 1234.0);
}
}
test "coerce undefined to optional" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try expect(MakeType(void).getNull() == null);
try expect(MakeType(void).getNonNull() != null);
}
fn MakeType(comptime T: type) type {
return struct {
fn getNull() ?T {
return null;
}
fn getNonNull() ?T {
return @as(T, undefined);
}
};
}
test "implicit cast from *[N]T to [*c]T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var x: [4]u16 = [4]u16{ 0, 1, 2, 3 };
var y: [*c]u16 = &x;
try expect(std.mem.eql(u16, x[0..4], y[0..4]));
x[0] = 8;
y[3] = 6;
try expect(std.mem.eql(u16, x[0..4], y[0..4]));
}
test "*usize to *void" {
var i = @as(usize, 0);
var v = @ptrCast(*void, &i);
v.* = {};
}
test "@intToEnum passed a comptime_int to an enum with one item" {
const E = enum { A };
const x = @intToEnum(E, 0);
try expect(x == E.A);
}
test "@intCast to u0 and use the result" {
const S = struct {
fn doTheTest(zero: u1, one: u1, bigzero: i32) !void {
try expect((one << @intCast(u0, bigzero)) == 1);
try expect((zero << @intCast(u0, bigzero)) == 0);
}
};
try S.doTheTest(0, 1, 0);
comptime try S.doTheTest(0, 1, 0);
}
test "peer result null and comptime_int" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn blah(n: i32) ?i32 {
if (n == 0) {
return null;
} else if (n < 0) {
return -1;
} else {
return 1;
}
}
};
try expect(S.blah(0) == null);
comptime try expect(S.blah(0) == null);
try expect(S.blah(10).? == 1);
comptime try expect(S.blah(10).? == 1);
try expect(S.blah(-10).? == -1);
comptime try expect(S.blah(-10).? == -1);
}
test "*const ?[*]const T to [*c]const [*c]const T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_x86_64 or builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var array = [_]u8{ 'o', 'k' };
const opt_array_ptr: ?[*]const u8 = &array;
const a: *const ?[*]const u8 = &opt_array_ptr;
const b: [*c]const [*c]const u8 = a;
try expect(b.*[0] == 'o');
try expect(b[0][1] == 'k');
}
test "array coersion to undefined at runtime" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
@setRuntimeSafety(true);
if (builtin.mode != .Debug and builtin.mode != .ReleaseSafe) {
return error.SkipZigTest;
}
var array = [4]u8{ 3, 4, 5, 6 };
var undefined_val = [4]u8{ 0xAA, 0xAA, 0xAA, 0xAA };
try expect(std.mem.eql(u8, &array, &array));
array = undefined;
try expect(std.mem.eql(u8, &array, &undefined_val));
}
test "implicitly cast from int to anyerror!?T" {
implicitIntLitToOptional();
comptime implicitIntLitToOptional();
}
fn implicitIntLitToOptional() void {
const f: ?i32 = 1;
_ = f;
const g: anyerror!?i32 = 1;
_ = g catch {};
}
test "return u8 coercing into ?u32 return type" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
try expect(foo(123).? == 123);
}
fn foo(arg: u8) ?u32 {
return arg;
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "cast from ?[*]T to ??[*]T" {
const a: ??[*]u8 = @as(?[*]u8, null);
try expect(a != null and a.? == null);
}
test "peer type unsigned int to signed" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var w: u31 = 5;
var x: u8 = 7;
var y: i32 = -5;
var a = w + y + x;
comptime try expect(@TypeOf(a) == i32);
try expect(a == 7);
}
test "expected [*c]const u8, found [*:0]const u8" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var a: [*:0]const u8 = "hello";
var b: [*c]const u8 = a;
var c: [*:0]const u8 = b;
try expect(std.mem.eql(u8, c[0..5], "hello"));
}
test "explicit cast from integer to error type" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try testCastIntToErr(error.ItBroke);
comptime try testCastIntToErr(error.ItBroke);
}
fn testCastIntToErr(err: anyerror) !void {
const x = @errorToInt(err);
const y = @intToError(x);
try expect(error.ItBroke == y);
}
test "peer resolve array and const slice" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try testPeerResolveArrayConstSlice(true);
comptime try testPeerResolveArrayConstSlice(true);
}
fn testPeerResolveArrayConstSlice(b: bool) !void {
const value1 = if (b) "aoeu" else @as([]const u8, "zz");
const value2 = if (b) @as([]const u8, "zz") else "aoeu";
try expect(mem.eql(u8, value1, "aoeu"));
try expect(mem.eql(u8, value2, "zz"));
}
test "implicitly cast from T to anyerror!?T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try castToOptionalTypeError(1);
comptime try castToOptionalTypeError(1);
}
const A = struct {
a: i32,
};
fn castToOptionalTypeError(z: i32) !void {
const x = @as(i32, 1);
const y: anyerror!?i32 = x;
try expect((try y).? == 1);
const f = z;
const g: anyerror!?i32 = f;
_ = try g;
const a = A{ .a = z };
const b: anyerror!?A = a;
try expect((b catch unreachable).?.a == 1);
}
test "implicitly cast from [0]T to anyerror![]T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try testCastZeroArrayToErrSliceMut();
comptime try testCastZeroArrayToErrSliceMut();
}
fn testCastZeroArrayToErrSliceMut() !void {
try expect((gimmeErrOrSlice() catch unreachable).len == 0);
}
fn gimmeErrOrSlice() anyerror![]u8 {
return &[_]u8{};
}
test "peer type resolution: [0]u8, []const u8, and anyerror![]u8" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() anyerror!void {
{
var data = "hi".*;
const slice = data[0..];
try expect((try peerTypeEmptyArrayAndSliceAndError(true, slice)).len == 0);
try expect((try peerTypeEmptyArrayAndSliceAndError(false, slice)).len == 1);
}
{
var data: [2]u8 = "hi".*;
const slice = data[0..];
try expect((try peerTypeEmptyArrayAndSliceAndError(true, slice)).len == 0);
try expect((try peerTypeEmptyArrayAndSliceAndError(false, slice)).len == 1);
}
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
fn peerTypeEmptyArrayAndSliceAndError(a: bool, slice: []u8) anyerror![]u8 {
if (a) {
return &[_]u8{};
}
return slice[0..1];
}
test "implicit cast from *const [N]T to []const T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try testCastConstArrayRefToConstSlice();
comptime try testCastConstArrayRefToConstSlice();
}
fn testCastConstArrayRefToConstSlice() !void {
{
const blah = "aoeu".*;
const const_array_ref = &blah;
try expect(@TypeOf(const_array_ref) == *const [4:0]u8);
const slice: []const u8 = const_array_ref;
try expect(mem.eql(u8, slice, "aoeu"));
}
{
const blah: [4]u8 = "aoeu".*;
const const_array_ref = &blah;
try expect(@TypeOf(const_array_ref) == *const [4]u8);
const slice: []const u8 = const_array_ref;
try expect(mem.eql(u8, slice, "aoeu"));
}
}
test "peer type resolution: error and [N]T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try expect(mem.eql(u8, try testPeerErrorAndArray(0), "OK"));
comptime try expect(mem.eql(u8, try testPeerErrorAndArray(0), "OK"));
try expect(mem.eql(u8, try testPeerErrorAndArray2(1), "OKK"));
comptime try expect(mem.eql(u8, try testPeerErrorAndArray2(1), "OKK"));
}
fn testPeerErrorAndArray(x: u8) anyerror![]const u8 {
return switch (x) {
0x00 => "OK",
else => error.BadValue,
};
}
fn testPeerErrorAndArray2(x: u8) anyerror![]const u8 {
return switch (x) {
0x00 => "OK",
0x01 => "OKK",
else => error.BadValue,
};
}
test "single-item pointer of array to slice to unknown length pointer" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try testCastPtrOfArrayToSliceAndPtr();
comptime try testCastPtrOfArrayToSliceAndPtr();
}
fn testCastPtrOfArrayToSliceAndPtr() !void {
{
var array = "aoeu".*;
const x: [*]u8 = &array;
x[0] += 1;
try expect(mem.eql(u8, array[0..], "boeu"));
const y: []u8 = &array;
y[0] += 1;
try expect(mem.eql(u8, array[0..], "coeu"));
}
{
var array: [4]u8 = "aoeu".*;
const x: [*]u8 = &array;
x[0] += 1;
try expect(mem.eql(u8, array[0..], "boeu"));
const y: []u8 = &array;
y[0] += 1;
try expect(mem.eql(u8, array[0..], "coeu"));
}
}
test "cast *[1][*]const u8 to [*]const ?[*]const u8" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const window_name = [1][*]const u8{"window name"};
const x: [*]const ?[*]const u8 = &window_name;
try expect(mem.eql(u8, std.mem.sliceTo(@ptrCast([*:0]const u8, x[0].?), 0), "window name"));
}
test "vector casts" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
// Upcast (implicit, equivalent to @intCast)
var up0: @Vector(2, u8) = [_]u8{ 0x55, 0xaa };
var up1 = @as(@Vector(2, u16), up0);
var up2 = @as(@Vector(2, u32), up0);
var up3 = @as(@Vector(2, u64), up0);
// Downcast (safety-checked)
var down0 = up3;
var down1 = @intCast(@Vector(2, u32), down0);
var down2 = @intCast(@Vector(2, u16), down0);
var down3 = @intCast(@Vector(2, u8), down0);
try expect(mem.eql(u16, &@as([2]u16, up1), &[2]u16{ 0x55, 0xaa }));
try expect(mem.eql(u32, &@as([2]u32, up2), &[2]u32{ 0x55, 0xaa }));
try expect(mem.eql(u64, &@as([2]u64, up3), &[2]u64{ 0x55, 0xaa }));
try expect(mem.eql(u32, &@as([2]u32, down1), &[2]u32{ 0x55, 0xaa }));
try expect(mem.eql(u16, &@as([2]u16, down2), &[2]u16{ 0x55, 0xaa }));
try expect(mem.eql(u8, &@as([2]u8, down3), &[2]u8{ 0x55, 0xaa }));
}
fn doTheTestFloat() !void {
var vec = @splat(2, @as(f32, 1234.0));
var wider: @Vector(2, f64) = vec;
try expect(wider[0] == 1234.0);
try expect(wider[1] == 1234.0);
}
};
try S.doTheTest();
comptime try S.doTheTest();
try S.doTheTestFloat();
comptime try S.doTheTestFloat();
}
test "@floatCast cast down" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
{
var double: f64 = 0.001534;
var single = @floatCast(f32, double);
try expect(single == 0.001534);
}
{
const double: f64 = 0.001534;
const single = @floatCast(f32, double);
try expect(single == 0.001534);
}
}
test "peer type resolution: unreachable, error set, unreachable" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const Error = error{
FileDescriptorAlreadyPresentInSet,
OperationCausesCircularLoop,
FileDescriptorNotRegistered,
SystemResources,
UserResourceLimitReached,
FileDescriptorIncompatibleWithEpoll,
Unexpected,
};
var err = Error.SystemResources;
const transformed_err = switch (err) {
error.FileDescriptorAlreadyPresentInSet => unreachable,
error.OperationCausesCircularLoop => unreachable,
error.FileDescriptorNotRegistered => unreachable,
error.SystemResources => error.SystemResources,
error.UserResourceLimitReached => error.UserResourceLimitReached,
error.FileDescriptorIncompatibleWithEpoll => unreachable,
error.Unexpected => unreachable,
};
try expect(transformed_err == error.SystemResources);
}
test "peer cast: error set any anyerror" {
const a: error{ One, Two } = undefined;
const b: anyerror = undefined;
try expect(@TypeOf(a, b) == anyerror);
try expect(@TypeOf(b, a) == anyerror);
}
test "peer type resolution: error set supersets" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const a: error{ One, Two } = undefined;
const b: error{One} = undefined;
// A superset of B
{
const ty = @TypeOf(a, b);
const error_set_info = @typeInfo(ty);
try expect(error_set_info == .ErrorSet);
try expect(error_set_info.ErrorSet.?.len == 2);
try expect(mem.eql(u8, error_set_info.ErrorSet.?[0].name, "One"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[1].name, "Two"));
}
// B superset of A
{
const ty = @TypeOf(b, a);
const error_set_info = @typeInfo(ty);
try expect(error_set_info == .ErrorSet);
try expect(error_set_info.ErrorSet.?.len == 2);
try expect(mem.eql(u8, error_set_info.ErrorSet.?[0].name, "One"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[1].name, "Two"));
}
}
test "peer type resolution: disjoint error sets" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const a: error{ One, Two } = undefined;
const b: error{Three} = undefined;
{
const ty = @TypeOf(a, b);
const error_set_info = @typeInfo(ty);
try expect(error_set_info == .ErrorSet);
try expect(error_set_info.ErrorSet.?.len == 3);
try expect(mem.eql(u8, error_set_info.ErrorSet.?[0].name, "One"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[1].name, "Three"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[2].name, "Two"));
}
{
const ty = @TypeOf(b, a);
const error_set_info = @typeInfo(ty);
try expect(error_set_info == .ErrorSet);
try expect(error_set_info.ErrorSet.?.len == 3);
try expect(mem.eql(u8, error_set_info.ErrorSet.?[0].name, "One"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[1].name, "Three"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[2].name, "Two"));
}
}
test "peer type resolution: error union and error set" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const a: error{Three} = undefined;
const b: error{ One, Two }!u32 = undefined;
{
const ty = @TypeOf(a, b);
const info = @typeInfo(ty);
try expect(info == .ErrorUnion);
const error_set_info = @typeInfo(info.ErrorUnion.error_set);
try expect(error_set_info.ErrorSet.?.len == 3);
try expect(mem.eql(u8, error_set_info.ErrorSet.?[0].name, "One"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[1].name, "Three"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[2].name, "Two"));
}
{
const ty = @TypeOf(b, a);
const info = @typeInfo(ty);
try expect(info == .ErrorUnion);
const error_set_info = @typeInfo(info.ErrorUnion.error_set);
try expect(error_set_info.ErrorSet.?.len == 3);
try expect(mem.eql(u8, error_set_info.ErrorSet.?[0].name, "One"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[1].name, "Three"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[2].name, "Two"));
}
}
test "peer type resolution: error union after non-error" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const a: u32 = undefined;
const b: error{ One, Two }!u32 = undefined;
{
const ty = @TypeOf(a, b);
const info = @typeInfo(ty);
try expect(info == .ErrorUnion);
try expect(info.ErrorUnion.payload == u32);
const error_set_info = @typeInfo(info.ErrorUnion.error_set);
try expect(error_set_info.ErrorSet.?.len == 2);
try expect(mem.eql(u8, error_set_info.ErrorSet.?[0].name, "One"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[1].name, "Two"));
}
{
const ty = @TypeOf(b, a);
const info = @typeInfo(ty);
try expect(info == .ErrorUnion);
try expect(info.ErrorUnion.payload == u32);
const error_set_info = @typeInfo(info.ErrorUnion.error_set);
try expect(error_set_info.ErrorSet.?.len == 2);
try expect(mem.eql(u8, error_set_info.ErrorSet.?[0].name, "One"));
try expect(mem.eql(u8, error_set_info.ErrorSet.?[1].name, "Two"));
}
}
test "peer cast *[0]T to E![]const T" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var buffer: [5]u8 = "abcde".*;
var buf: anyerror![]const u8 = buffer[0..];
var b = false;
var y = if (b) &[0]u8{} else buf;
var z = if (!b) buf else &[0]u8{};
try expect(mem.eql(u8, "abcde", y catch unreachable));
try expect(mem.eql(u8, "abcde", z catch unreachable));
}
test "peer cast *[0]T to []const T" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var buffer: [5]u8 = "abcde".*;
var buf: []const u8 = buffer[0..];
var b = false;
var y = if (b) &[0]u8{} else buf;
try expect(mem.eql(u8, "abcde", y));
}
test "peer cast *[N]T to [*]T" {
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var array = [4:99]i32{ 1, 2, 3, 4 };
var dest: [*]i32 = undefined;
try expect(@TypeOf(&array, dest) == [*]i32);
try expect(@TypeOf(dest, &array) == [*]i32);
}
test "peer resolution of string literals" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
const E = enum { a, b, c, d };
fn doTheTest(e: E) !void {
const cmd = switch (e) {
.a => "one",
.b => "two",
.c => "three",
.d => "four",
};
try expect(mem.eql(u8, cmd, "two"));
}
};
try S.doTheTest(.b);
comptime try S.doTheTest(.b);
}
test "peer cast [:x]T to []T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var array = [4:0]i32{ 1, 2, 3, 4 };
var slice: [:0]i32 = &array;
var dest: []i32 = slice;
try expect(mem.eql(i32, dest, &[_]i32{ 1, 2, 3, 4 }));
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "peer cast [N:x]T to [N]T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var array = [4:0]i32{ 1, 2, 3, 4 };
var dest: [4]i32 = array;
try expect(mem.eql(i32, &dest, &[_]i32{ 1, 2, 3, 4 }));
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "peer cast *[N:x]T to *[N]T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var array = [4:0]i32{ 1, 2, 3, 4 };
var dest: *[4]i32 = &array;
try expect(mem.eql(i32, dest, &[_]i32{ 1, 2, 3, 4 }));
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "peer cast [*:x]T to [*]T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var array = [4:99]i32{ 1, 2, 3, 4 };
var dest: [*]i32 = &array;
try expect(dest[0] == 1);
try expect(dest[1] == 2);
try expect(dest[2] == 3);
try expect(dest[3] == 4);
try expect(dest[4] == 99);
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "peer cast [:x]T to [*:x]T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var array = [4:0]i32{ 1, 2, 3, 4 };
var slice: [:0]i32 = &array;
var dest: [*:0]i32 = slice;
try expect(dest[0] == 1);
try expect(dest[1] == 2);
try expect(dest[2] == 3);
try expect(dest[3] == 4);
try expect(dest[4] == 0);
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "peer type resolution implicit cast to return type" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
for ("hello") |c| _ = f(c);
}
fn f(c: u8) []const u8 {
return switch (c) {
'h', 'e' => &[_]u8{c}, // should cast to slice
'l', ' ' => &[_]u8{ c, '.' }, // should cast to slice
else => ([_]u8{c})[0..], // is a slice
};
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "peer type resolution implicit cast to variable type" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var x: []const u8 = undefined;
for ("hello") |c| x = switch (c) {
'h', 'e' => &[_]u8{c}, // should cast to slice
'l', ' ' => &[_]u8{ c, '.' }, // should cast to slice
else => ([_]u8{c})[0..], // is a slice
};
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "variable initialization uses result locations properly with regards to the type" {
var b = true;
const x: i32 = if (b) 1 else 2;
try expect(x == 1);
}
test "cast between C pointer with different but compatible types" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn foo(arg: [*]c_ushort) u16 {
return arg[0];
}
fn doTheTest() !void {
var x = [_]u16{ 4, 2, 1, 3 };
try expect(foo(@ptrCast([*]u16, &x)) == 4);
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "peer type resolve string lit with sentinel-terminated mutable slice" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var array: [4:0]u8 = undefined;
array[4] = 0; // TODO remove this when #4372 is solved
var slice: [:0]u8 = array[0..4 :0];
comptime try expect(@TypeOf(slice, "hi") == [:0]const u8);
comptime try expect(@TypeOf("hi", slice) == [:0]const u8);
}
test "peer type resolve array pointers, one of them const" {
var array1: [4]u8 = undefined;
const array2: [5]u8 = undefined;
comptime try expect(@TypeOf(&array1, &array2) == []const u8);
comptime try expect(@TypeOf(&array2, &array1) == []const u8);
}
test "peer type resolve array pointer and unknown pointer" {
const const_array: [4]u8 = undefined;
var array: [4]u8 = undefined;
var const_ptr: [*]const u8 = undefined;
var ptr: [*]u8 = undefined;
comptime try expect(@TypeOf(&array, ptr) == [*]u8);
comptime try expect(@TypeOf(ptr, &array) == [*]u8);
comptime try expect(@TypeOf(&const_array, ptr) == [*]const u8);
comptime try expect(@TypeOf(ptr, &const_array) == [*]const u8);
comptime try expect(@TypeOf(&array, const_ptr) == [*]const u8);
comptime try expect(@TypeOf(const_ptr, &array) == [*]const u8);
comptime try expect(@TypeOf(&const_array, const_ptr) == [*]const u8);
comptime try expect(@TypeOf(const_ptr, &const_array) == [*]const u8);
}
test "comptime float casts" {
const a = @intToFloat(comptime_float, 1);
try expect(a == 1);
try expect(@TypeOf(a) == comptime_float);
const b = @floatToInt(comptime_int, 2);
try expect(b == 2);
try expect(@TypeOf(b) == comptime_int);
try expectFloatToInt(comptime_int, 1234, i16, 1234);
try expectFloatToInt(comptime_float, 12.3, comptime_int, 12);
}
test "pointer reinterpret const float to int" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
// The hex representation is 0x3fe3333333333303.
const float: f64 = 5.99999999999994648725e-01;
const float_ptr = &float;
const int_ptr = @ptrCast(*const i32, float_ptr);
const int_val = int_ptr.*;
if (native_endian == .Little)
try expect(int_val == 0x33333303)
else
try expect(int_val == 0x3fe33333);
}
test "implicit cast from [*]T to ?*anyopaque" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var a = [_]u8{ 3, 2, 1 };
var runtime_zero: usize = 0;
incrementVoidPtrArray(a[runtime_zero..].ptr, 3);
try expect(std.mem.eql(u8, &a, &[_]u8{ 4, 3, 2 }));
}
fn incrementVoidPtrArray(array: ?*anyopaque, len: usize) void {
var n: usize = 0;
while (n < len) : (n += 1) {
@ptrCast([*]u8, array.?)[n] += 1;
}
}
test "compile time int to ptr of function" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
try foobar(FUNCTION_CONSTANT);
}
// On some architectures function pointers must be aligned.
const hardcoded_fn_addr = maxInt(usize) & ~@as(usize, 0xf);
pub const FUNCTION_CONSTANT = @intToPtr(PFN_void, hardcoded_fn_addr);
pub const PFN_void = *const fn (*anyopaque) callconv(.C) void;
fn foobar(func: PFN_void) !void {
try std.testing.expect(@ptrToInt(func) == hardcoded_fn_addr);
}
test "implicit ptr to *anyopaque" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var a: u32 = 1;
var ptr: *align(@alignOf(u32)) anyopaque = &a;
var b: *u32 = @ptrCast(*u32, ptr);
try expect(b.* == 1);
var ptr2: ?*align(@alignOf(u32)) anyopaque = &a;
var c: *u32 = @ptrCast(*u32, ptr2.?);
try expect(c.* == 1);
}
test "return null from fn() anyerror!?&T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const a = returnNullFromOptionalTypeErrorRef();
const b = returnNullLitFromOptionalTypeErrorRef();
try expect((try a) == null and (try b) == null);
}
fn returnNullFromOptionalTypeErrorRef() anyerror!?*A {
const a: ?*A = null;
return a;
}
fn returnNullLitFromOptionalTypeErrorRef() anyerror!?*A {
return null;
}
test "peer type resolution: [0]u8 and []const u8" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try expect(peerTypeEmptyArrayAndSlice(true, "hi").len == 0);
try expect(peerTypeEmptyArrayAndSlice(false, "hi").len == 1);
comptime {
try expect(peerTypeEmptyArrayAndSlice(true, "hi").len == 0);
try expect(peerTypeEmptyArrayAndSlice(false, "hi").len == 1);
}
}
fn peerTypeEmptyArrayAndSlice(a: bool, slice: []const u8) []const u8 {
if (a) {
return &[_]u8{};
}
return slice[0..1];
}
test "implicitly cast from [N]T to ?[]const T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try expect(mem.eql(u8, castToOptionalSlice().?, "hi"));
comptime try expect(mem.eql(u8, castToOptionalSlice().?, "hi"));
}
fn castToOptionalSlice() ?[]const u8 {
return "hi";
}
test "cast u128 to f128 and back" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
comptime try testCast128();
try testCast128();
}
fn testCast128() !void {
try expect(cast128Int(cast128Float(0x7fff0000000000000000000000000000)) == 0x7fff0000000000000000000000000000);
}
fn cast128Int(x: f128) u128 {
return @bitCast(u128, x);
}
fn cast128Float(x: u128) f128 {
return @bitCast(f128, x);
}
test "implicit cast from *[N]T to ?[*]T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var x: ?[*]u16 = null;
var y: [4]u16 = [4]u16{ 0, 1, 2, 3 };
x = &y;
try expect(std.mem.eql(u16, x.?[0..4], y[0..4]));
x.?[0] = 8;
y[3] = 6;
try expect(std.mem.eql(u16, x.?[0..4], y[0..4]));
}
test "implicit cast from *T to ?*anyopaque" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var a: u8 = 1;
incrementVoidPtrValue(&a);
try std.testing.expect(a == 2);
}
fn incrementVoidPtrValue(value: ?*anyopaque) void {
@ptrCast(*u8, value.?).* += 1;
}
test "implicit cast *[0]T to E![]const u8" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var x = @as(anyerror![]const u8, &[0]u8{});
try expect((x catch unreachable).len == 0);
}
var global_array: [4]u8 = undefined;
test "cast from array reference to fn: comptime fn ptr" {
const f = @ptrCast(*align(1) const fn () callconv(.C) void, &global_array);
try expect(@ptrToInt(f) == @ptrToInt(&global_array));
}
test "cast from array reference to fn: runtime fn ptr" {
var f = @ptrCast(*align(1) const fn () callconv(.C) void, &global_array);
try expect(@ptrToInt(f) == @ptrToInt(&global_array));
}
test "*const [N]null u8 to ?[]const u8" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var a = "Hello";
var b: ?[]const u8 = a;
try expect(mem.eql(u8, b.?, "Hello"));
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "cast between [*c]T and ?[*:0]T on fn parameter" {
const S = struct {
const Handler = ?fn ([*c]const u8) callconv(.C) void;
fn addCallback(comptime handler: Handler) void {
_ = handler;
}
fn myCallback(cstr: ?[*:0]const u8) callconv(.C) void {
_ = cstr;
}
fn doTheTest() void {
addCallback(myCallback);
}
};
S.doTheTest();
}
var global_struct: struct { f0: usize } = undefined;
test "assignment to optional pointer result loc" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var foo: struct { ptr: ?*anyopaque } = .{ .ptr = &global_struct };
try expect(foo.ptr.? == @ptrCast(*anyopaque, &global_struct));
}
test "cast between *[N]void and []void" {
var a: [4]void = undefined;
var b: []void = &a;
try expect(b.len == 4);
}
test "peer resolve arrays of different size to const slice" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try expect(mem.eql(u8, boolToStr(true), "true"));
try expect(mem.eql(u8, boolToStr(false), "false"));
comptime try expect(mem.eql(u8, boolToStr(true), "true"));
comptime try expect(mem.eql(u8, boolToStr(false), "false"));
}
fn boolToStr(b: bool) []const u8 {
return if (b) "true" else "false";
}
test "cast f16 to wider types" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var x: f16 = 1234.0;
try expect(@as(f32, 1234.0) == x);
try expect(@as(f64, 1234.0) == x);
try expect(@as(f128, 1234.0) == x);
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "cast f128 to narrower types" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.os.tag == .windows and builtin.cpu.arch == .aarch64 and
builtin.zig_backend == .stage2_c)
{
// https://github.com/ziglang/zig/issues/13876
return error.SkipZigTest;
}
const S = struct {
fn doTheTest() !void {
var x: f128 = 1234.0;
try expect(@as(f16, 1234.0) == @floatCast(f16, x));
try expect(@as(f32, 1234.0) == @floatCast(f32, x));
try expect(@as(f64, 1234.0) == @floatCast(f64, x));
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "peer type resolution: unreachable, null, slice" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest(num: usize, word: []const u8) !void {
const result = switch (num) {
0 => null,
1 => word,
else => unreachable,
};
try expect(mem.eql(u8, result.?, "hi"));
}
};
try S.doTheTest(1, "hi");
}
test "cast i8 fn call peers to i32 result" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var cond = true;
const value: i32 = if (cond) smallBoi() else bigBoi();
try expect(value == 123);
}
fn smallBoi() i8 {
return 123;
}
fn bigBoi() i16 {
return 1234;
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "cast compatible optional types" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var a: ?[:0]const u8 = null;
var b: ?[]const u8 = a;
try expect(b == null);
}
test "coerce undefined single-item pointer of array to error union of slice" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const a = @as([*]u8, undefined)[0..0];
var b: error{a}![]const u8 = a;
const s = try b;
try expect(s.len == 0);
}
test "pointer to empty struct literal to mutable slice" {
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var x: []i32 = &.{};
try expect(x.len == 0);
}
test "coerce between pointers of compatible differently-named floats" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.os.tag == .windows) {
// https://github.com/ziglang/zig/issues/12396
return error.SkipZigTest;
}
const F = switch (@typeInfo(c_longdouble).Float.bits) {
16 => f16,
32 => f32,
64 => f64,
80 => f80,
128 => f128,
else => @compileError("unreachable"),
};
var f1: F = 12.34;
var f2: *c_longdouble = &f1;
f2.* += 1;
try expect(f1 == @as(F, 12.34) + 1);
}
test "peer type resolution of const and non-const pointer to array" {
const a = @intToPtr(*[1024]u8, 42);
const b = @intToPtr(*const [1024]u8, 42);
try std.testing.expect(@TypeOf(a, b) == *const [1024]u8);
try std.testing.expect(a == b);
}
test "floatToInt to zero-bit int" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
var a: f32 = 0.0;
comptime try std.testing.expect(@floatToInt(u0, a) == 0);
}
test "peer type resolution of function pointer and function body" {
const T = fn () u32;
const a: T = undefined;
const b: *const T = undefined;
try expect(@TypeOf(a, b) == *const fn () u32);
try expect(@TypeOf(b, a) == *const fn () u32);
}
test "cast typed undefined to int" {
comptime {
const a: u16 = undefined;
const b: u8 = a;
_ = b;
}
}
test "implicit cast from [:0]T to [*c]T" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
var a: [:0]const u8 = "foo";
var b: [*c]const u8 = a;
var c = std.mem.span(b);
try expect(c.len == a.len);
try expect(c.ptr == a.ptr);
}
test "bitcast packed struct with u0" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
const S = packed struct(u2) { a: u0, b: u2 };
const s = @bitCast(S, @as(u2, 2));
try expect(s.a == 0);
try expect(s.b == 2);
const i = @bitCast(u2, s);
try expect(i == 2);
}
test "optional pointer coerced to optional allowzero pointer" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
var p: ?*u32 = undefined;
var q: ?*allowzero u32 = undefined;
p = @intToPtr(*u32, 4);
q = p;
try expect(@ptrToInt(q.?) == 4);
}
test "ptrToInt on const inside comptime block" {
var a = comptime blk: {
const b: u8 = 1;
const c = @ptrToInt(&b);
break :blk c;
};
try expect(@intToPtr(*const u8, a).* == 1);
}
test "single item pointer to pointer to array to slice" {
var x: i32 = 1234;
try expect(@as([]const i32, @as(*[1]i32, &x))[0] == 1234);
const z1 = @as([]const i32, @as(*[1]i32, &x));
try expect(z1[0] == 1234);
}
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