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std.meta: handle comptime fields in hasUniqueRepresentation (#22132)

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Fri3dNstuff 2025-01-26 20:23:34 +02:00 committed by GitHub
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lib/std/meta.zig
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@ -1208,6 +1208,7 @@ pub inline fn hasUniqueRepresentation(comptime T: type) bool {
var sum_size = @as(usize, 0); var sum_size = @as(usize, 0);
inline for (info.fields) |field| { inline for (info.fields) |field| {
if (field.is_comptime) continue;
if (!hasUniqueRepresentation(field.type)) return false; if (!hasUniqueRepresentation(field.type)) return false;
sum_size += @sizeOf(field.type); sum_size += @sizeOf(field.type);
} }
@ -1310,4 +1311,12 @@ test hasUniqueRepresentation {
try testing.expect(hasUniqueRepresentation(@Vector(std.simd.suggestVectorLength(u8) orelse 1, u8))); try testing.expect(hasUniqueRepresentation(@Vector(std.simd.suggestVectorLength(u8) orelse 1, u8)));
try testing.expect(@sizeOf(@Vector(3, u8)) == 3 or !hasUniqueRepresentation(@Vector(3, u8))); try testing.expect(@sizeOf(@Vector(3, u8)) == 3 or !hasUniqueRepresentation(@Vector(3, u8)));
const StructWithComptimeFields = struct {
comptime should_be_ignored: u64 = 42,
comptime should_also_be_ignored: [*:0]const u8 = "hope you're having a good day :)",
field: u32,
};
try testing.expect(hasUniqueRepresentation(StructWithComptimeFields));
} }