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const std = @import("std");
const builtin = @import("builtin");
const expect = std.testing.expect;
const expectEqual = std.testing.expectEqual;
const mem = std.mem;
fn initStaticArray() [10]i32 {
var array: [10]i32 = undefined;
array[0] = 1;
array[4] = 2;
array[7] = 3;
array[9] = 4;
return array;
}
const static_array = initStaticArray();
test "init static array to undefined" {
// This test causes `initStaticArray()` to be codegen'd, and the
// C backend does not yet support returning arrays, so it fails
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
try expect(static_array[0] == 1);
try expect(static_array[4] == 2);
try expect(static_array[7] == 3);
try expect(static_array[9] == 4);
comptime {
try expect(static_array[0] == 1);
try expect(static_array[4] == 2);
try expect(static_array[7] == 3);
try expect(static_array[9] == 4);
}
}
const Foo = struct {
x: i32,
fn setFooXMethod(foo: *Foo) void {
foo.x = 3;
}
};
fn setFooX(foo: *Foo) void {
foo.x = 2;
}
test "assign undefined to struct" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
comptime {
var foo: Foo = undefined;
setFooX(&foo);
try expect(foo.x == 2);
}
{
var foo: Foo = undefined;
setFooX(&foo);
try expect(foo.x == 2);
}
}
test "assign undefined to struct with method" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
comptime {
var foo: Foo = undefined;
foo.setFooXMethod();
try expect(foo.x == 3);
}
{
var foo: Foo = undefined;
foo.setFooXMethod();
try expect(foo.x == 3);
}
}
test "type name of undefined" {
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const x = undefined;
try expect(mem.eql(u8, @typeName(@TypeOf(x)), "@TypeOf(undefined)"));
}
var buf: []u8 = undefined;
test "reslice of undefined global var slice" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
var stack_buf: [100]u8 = [_]u8{0} ** 100;
buf = &stack_buf;
const x = buf[0..1];
try @import("std").testing.expect(x.len == 1 and x[0] == 0);
}
test "returned undef is 0xaa bytes when runtime safety is enabled" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_riscv64) return error.SkipZigTest;
const Rect = struct {
x: f32,
fn getUndefStruct() @This() {
@setRuntimeSafety(true);
return undefined;
}
fn getUndefInt() u32 {
@setRuntimeSafety(true);
return undefined;
}
};
try std.testing.expect(@as(u32, @bitCast(Rect.getUndefStruct().x)) == 0xAAAAAAAA);
try std.testing.expect(Rect.getUndefInt() == 0xAAAAAAAA);
}
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