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const std = @import("std");
const builtin = @import("builtin");
const expect = std.testing.expect;
const expectEqual = std.testing.expectEqual;
test "bool literals" {
try expect(true);
try expect(!false);
}
test "cast bool to int" {
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const t = true;
const f = false;
try expectEqual(@as(u32, 1), @intFromBool(t));
try expectEqual(@as(u32, 0), @intFromBool(f));
try expectEqual(-1, @as(i1, @bitCast(@intFromBool(t))));
try expectEqual(0, @as(i1, @bitCast(@intFromBool(f))));
try expectEqual(u1, @TypeOf(@intFromBool(t)));
try expectEqual(u1, @TypeOf(@intFromBool(f)));
try nonConstCastIntFromBool(t, f);
}
fn nonConstCastIntFromBool(t: bool, f: bool) !void {
try expectEqual(@as(u32, 1), @intFromBool(t));
try expectEqual(@as(u32, 0), @intFromBool(f));
try expectEqual(@as(i1, -1), @as(i1, @bitCast(@intFromBool(t))));
try expectEqual(@as(i1, 0), @as(i1, @bitCast(@intFromBool(f))));
try expectEqual(u1, @TypeOf(@intFromBool(t)));
try expectEqual(u1, @TypeOf(@intFromBool(f)));
}
test "bool cmp" {
try expect(testBoolCmp(true, false) == false);
}
fn testBoolCmp(a: bool, b: bool) bool {
return a == b;
}
const global_f = false;
const global_t = true;
const not_global_f = !global_f;
const not_global_t = !global_t;
test "compile time bool not" {
try expect(not_global_f);
try expect(!not_global_t);
}
test "short circuit" {
try testShortCircuit(false, true);
try comptime testShortCircuit(false, true);
}
fn testShortCircuit(f: bool, t: bool) !void {
var hit_1 = f;
var hit_2 = f;
var hit_3 = f;
var hit_4 = f;
if (t or x: {
try expect(f);
break :x f;
}) {
hit_1 = t;
}
if (f or x: {
hit_2 = t;
break :x f;
}) {
try expect(f);
}
if (t and x: {
hit_3 = t;
break :x f;
}) {
try expect(f);
}
if (f and x: {
try expect(f);
break :x f;
}) {
try expect(f);
} else {
hit_4 = t;
}
try expect(hit_1);
try expect(hit_2);
try expect(hit_3);
try expect(hit_4);
}
test "or with noreturn operand" {
const S = struct {
fn foo(a: u32, b: u32) bool {
return a == 5 or b == 2 or @panic("oh no");
}
};
_ = S.foo(2, 2);
}
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