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Sema: detect comptime-known union initializations

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Follow a similar pattern as we already do for validate_array_init and
validate_struct_init.

I threw in a bit of behavior test cleanup on top of it.
This commit is contained in:
Andrew Kelley
2022-03-02 17:28:39 -07:00
parent 220708e7c3
commit 1c8a86f063
9 changed files with 339 additions and 77 deletions
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10
test/behavior/array.zig
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@@ -108,15 +108,19 @@ test "array len field" {
}
test "array with sentinels" {
if (builtin.zig_backend == .stage1) {
// Stage1 test coverage disabled at runtime because of
// https://github.com/ziglang/zig/issues/4372
return error.SkipZigTest;
}
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
const S = struct {
fn doTheTest(is_ct: bool) !void {
if (is_ct or builtin.zig_backend != .stage1) {
{
var zero_sized: [0:0xde]u8 = [_:0xde]u8{};
// Stage1 test coverage disabled at runtime because of
// https://github.com/ziglang/zig/issues/4372
try expect(zero_sized[0] == 0xde);
var reinterpreted = @ptrCast(*[1]u8, &zero_sized);
try expect(reinterpreted[0] == 0xde);