authorgravatar for paul.verigo@gmail.comPavel Verigo <paul.verigo@gmail.com> 2024-01-28 17:15:33+01:00
committergravatar for git@vexu.euVeikka Tuominen <git@vexu.eu> 2024-01-29 01:43:19+02:00
log96a5f7c8edac4bb2f50bdfe31c1287207d90d29b
tree714e07743f7c52820b2de8263f0f476409a2ee73
parentc085c6ecdd4b9436955ba2bb38f829100ed9b33d

Sema: fix casting runtime value to enum with comptime int tag type

2 files changed, 20 insertions(+), 0 deletions(-)

src/Sema.zig+6
...@@ -8657,6 +8657,12 @@ fn zirEnumFromInt(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError...@@ -8657,6 +8657,12 @@ fn zirEnumFromInt(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError
8657 return Air.internedToRef((try mod.getCoerced(int_val, dest_ty)).toIntern());8657 return Air.internedToRef((try mod.getCoerced(int_val, dest_ty)).toIntern());
8658 }8658 }
86598659
8660 if (dest_ty.intTagType(mod).zigTypeTag(mod) == .ComptimeInt) {
8661 return sema.failWithNeededComptime(block, operand_src, .{
8662 .needed_comptime_reason = "value being casted to enum with 'comptime_int' tag type must be comptime-known",
8663 });
8664 }
8665
8660 if (try sema.typeHasOnePossibleValue(dest_ty)) |opv| {8666 if (try sema.typeHasOnePossibleValue(dest_ty)) |opv| {
8661 const result = Air.internedToRef(opv.toIntern());8667 const result = Air.internedToRef(opv.toIntern());
8662 // The operand is runtime-known but the result is comptime-known. In8668 // The operand is runtime-known but the result is comptime-known. In
test/cases/compile_errors/enum_backed_by_comptime_int_must_be_casted_from_comptime_value.zig created+14
...@@ -0,0 +1,14 @@
1export fn entry() void {
2 const Tag = enum(comptime_int) { a, b };
3
4 var v: u32 = 0;
5 _ = &v;
6 _ = @as(Tag, @enumFromInt(v));
7}
8
9// error
10// backend=stage2
11// target=native
12//
13// :6:31: error: unable to resolve comptime value
14// :6:31: note: value being casted to enum with 'comptime_int' tag type must be comptime-known