Commit e70a0b2a6b329a76e9edc4d22c7b923841703a24 | zig

Closes #15019

2 files changed, 25 insertions(+), 0 deletions(-)

src/value.zig+5

...	@@ -1113,6 +1113,10 @@ pub const Value = extern union {	...	@@ -1113,6 +1113,10 @@ pub const Value = extern union {
1113	.bool_true,	1113	.bool_true,
1114	=> return BigIntMutable.init(&space.limbs, 1).toConst(),	1114	=> return BigIntMutable.init(&space.limbs, 1).toConst(),
1115		1115
		1116	.enum_field_index => {
		1117	const index = val.castTag(.enum_field_index).?.data;
		1118	return BigIntMutable.init(&space.limbs, index).toConst();
		1119	},
1116	.runtime_value => {	1120	.runtime_value => {
1117	const sub_val = val.castTag(.runtime_value).?.data;	1121	const sub_val = val.castTag(.runtime_value).?.data;
1118	return sub_val.toBigIntAdvanced(space, target, opt_sema);	1122	return sub_val.toBigIntAdvanced(space, target, opt_sema);
...	@@ -1983,6 +1987,7 @@ pub const Value = extern union {	...	@@ -1983,6 +1987,7 @@ pub const Value = extern union {
1983	.variable,	1987	.variable,
1984	=> .gt,	1988	=> .gt,
1985		1989
		1990	.enum_field_index => return std.math.order(lhs.castTag(.enum_field_index).?.data, 0),
1986	.runtime_value => {	1991	.runtime_value => {
1987	// This is needed to correctly handle hashing the value.	1992	// This is needed to correctly handle hashing the value.
1988	// Checks in Sema should prevent direct comparisons from reaching here.	1993	// Checks in Sema should prevent direct comparisons from reaching here.

test/behavior/union.zig+20

...	@@ -1513,3 +1513,23 @@ test "packed union with zero-bit field" {	...	@@ -1513,3 +1513,23 @@ test "packed union with zero-bit field" {
1513	};	1513	};
1514	try S.doTest(.{ .nested = .{ .zero = {} }, .bar = 42 });	1514	try S.doTest(.{ .nested = .{ .zero = {} }, .bar = 42 });
1515	}	1515	}
		1516
		1517	test "reinterpreting enum value inside packed union" {
		1518	if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
		1519	if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
		1520	if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
		1521	if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
		1522
		1523	const U = packed union {
		1524	tag: enum { a, b },
		1525	val: u8,
		1526
		1527	fn doTest() !void {
		1528	var u: @This() = .{ .tag = .a };
		1529	u.val += 1;
		1530	try expect(u.tag == .b);
		1531	}
		1532	};
		1533	try U.doTest();
		1534	comptime try U.doTest();
		1535	}