type_info reflects an enum / tagged-union INTO a TypeInfo value — the
inverse of define's decode — so define(declare(n), type_info(T)) mints
a byte-identical copy with NO literal variant list.
- inst.zig: new BuiltinId.type_info (comptime-only, like declare/define).
- lower/call.zig: replace the 'not yet implemented' bail. Resolve $T at
lower time, reject non-enum/non-tagged-union loudly with a good span,
emit callBuiltin(.type_info, [const_type], TypeInfo).
- interp.zig: reflectTypeInfo builds the exact nested-aggregate Value
defineEnum decodes — variant {name,payload}, slice {data,len}, EnumInfo
{variants}, TypeInfo {tag0, EnumInfo}. tagged_union reflects field.ty
(tagless already void); payloadless `enum` reflects void per variant.
- emit: unchanged — type_info is always comptime-evaluated, the existing
comptime-only else arm (shared with declare/define) never fires.
0619 turns green: a source enum (circle:f64 / rect:i64 / empty) reflected
and reconstructed, constructs and matches like the original.
1ffda415c2