Hojun-Cho
9767ff8fff
A tagged-union value nested in module-level array/struct static-init mis-emitted in both stages: the lit-bytes emitters had no TY_TAGGED arm, so a tagged element/field fell to the int path and the payload landed in the TAG word -- match then read the wrong variant. The zero-placeholder idiom (today the only way to declare a tagged global: zero-init in static, write at runtime) was correct only by accident (int-variant zero folds to (0,0), which equals the right (tag0,0)). Extract a raw-byte core emittaggedbytes/emit_tagged_bytes -- variant tag@+0, int payload@+8, zero-pad to the slot size; no directive, no offset, no reloc -- and refactor the scalar tagged emitter to delegate to it (byte-id-neutral). Add a TY_TAGGED member branch to the array and struct lit-bytes emitters (both stages) that calls the core at the existing full-slot stride, before the int fallthrough. Zero stays (0,0) byte-identical; a non-zero element/field now emits (tag,payload) correctly. A wide (str/slice) or struct/>8B payload nested in an aggregate needs reloc-at-member-offset machinery the aggregate byte-emitters don't have, so it is loud-rejected (rule 7), deferred to #30; the existing slice-of-tagged static-init reject is unchanged. Regenerates the w6c and wwdump combined.ww. Table-driven 843 test: non-zero array/struct (pre-fix returned the wrong variant), the non-tag-0 bool-variant edge, byte-id-neutral zero-placeholder rows, and wide-payload reject rows; each run row also pins cs-vs-ww asm.
139 KiB
139 KiB