motiejus/zig
1
Fork 0
Code Releases Activity

Add support for both '_' and 'else' prongs at the same time in switch statements

Browse Source 
If both are used, 'else' handles named members and '_' handles
unnamed members. In this case the 'else' prong will be unrolled
to an explicit case containing all remaining named values.
This commit is contained in:
Justus Klausecker
2025-07-10 01:58:02 +02:00
parent 1d9b1c0212
commit ba549a7d67
11 changed files with 770 additions and 364 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
test/behavior/switch_loop.zig
View File

@@ -249,3 +249,27 @@ test "switch loop on larger than pointer integer" {
}
try expect(entry == 3);
}
test "switch loop on non-exhaustive enum" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest; // TODO
const S = struct {
const E = enum(u8) { a, b, c, _ };
fn doTheTest() !void {
var start: E = undefined;
start = .a;
const result: u32 = s: switch (start) {
.a => continue :s .c,
else => continue :s @enumFromInt(123),
.b, _ => |x| break :s @intFromEnum(x),
};
try expect(result == 123);
}
};
try S.doTheTest();
try comptime S.doTheTest();
}