Commit 82a6acca93683fa7272976879f338a0e66e3f82b | zig

Closes #15157

2 files changed, 32 insertions(+), 0 deletions(-)

src/Sema.zig+20

...	...	@@ -9963,6 +9963,26 @@ fn zirSwitchCapture(
9963	9963	const field_index = @intCast(u32, operand_ty.unionTagFieldIndex(item_val, sema.mod).?);
9964	9964	const union_obj = operand_ty.cast(Type.Payload.Union).?.data;
9965	9965	const field_ty = union_obj.fields.values()[field_index].ty;
	9966	if (try sema.resolveDefinedValue(block, sema.src, operand_ptr)) \|union_val\| {
	9967	if (is_ref) {
	9968	const ptr_field_ty = try Type.ptr(sema.arena, sema.mod, .{
	9969	.pointee_type = field_ty,
	9970	.mutable = operand_ptr_ty.ptrIsMutable(),
	9971	.@"volatile" = operand_ptr_ty.isVolatilePtr(),
	9972	.@"addrspace" = operand_ptr_ty.ptrAddressSpace(),
	9973	});
	9974	return sema.addConstant(
	9975	ptr_field_ty,
	9976	try Value.Tag.field_ptr.create(sema.arena, .{
	9977	.container_ptr = union_val,
	9978	.container_ty = operand_ty,
	9979	.field_index = field_index,
	9980	}),
	9981	);
	9982	}
	9983	const tag_and_val = union_val.castTag(.@"union").?.data;
	9984	return sema.addConstant(field_ty, tag_and_val.val);
	9985	}
9966	9986	if (is_ref) {
9967	9987	const ptr_field_ty = try Type.ptr(sema.arena, sema.mod, .{
9968	9988	.pointee_type = field_ty,

test/behavior/switch.zig+12

...	...	@@ -694,3 +694,15 @@ test "switch item sizeof" {
694	694	try S.doTheTest();
695	695	comptime try S.doTheTest();
696	696	}
	697
	698	test "comptime inline switch" {
	699	const U = union(enum) { a: type, b: type };
	700	const value = comptime blk: {
	701	var u: U = .{ .a = u32 };
	702	break :blk switch (u) {
	703	inline .a, .b => \|v\| v,
	704	};
	705	};
	706
	707	try expectEqual(u32, value);
	708	}