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wcc: exprtype resolves SK_USE module-qual N_DOT call results (#16, #17)

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Re-arming the wwstage asserttyped bail surfaced 94 nil-stamp warns in the
checked corpus: let (a,b) = mod.fn() left its destructure bindings (and every
use) unstamped because exprtype's N_CALL arm resolved an N_DOT callee by bare
leaf — the gap its own comment flagged (#16/#17). Fix at the root: when an
N_DOT callee's lhs resolves to SK_USE, resolve the result via
scopelookupinmodule (mirror cstage cexpr check.c:1035 + cgen fnretlookupmod
cgen.ww:2263). The N_MLET backfill then just consumes the resolved tuple,
matching harec create_unpack_bindings (check.c:1354-1419), which does no callee
resolution — single path, no third copy.

The SK_USE gate leaves the module-leaf==type/fn-name collision cases
(random/fnmatch) on bare lookup — that nominal-resolution gap is a separate
fold. Beyond destructure, the root fix also closes a latent cs!=ww divergence
on non-destructure cross-module same-leaf calls (a head-ordered shadow was
mis-sizing the receive slot).

asserttyped is ww-stage only, so the live ww-driver suite can't see this — the
net is the warn count (checked 94->0, collision cases unchanged) + cs==ww .s
(probe 956). Compiler binary unchanged; 990-997 byte-id hold.
This commit is contained in:
Hojun-Cho
2026-05-28 03:55:22 +09:00
parent c882bcf27c
commit ea1579a6fd
5 changed files with 439 additions and 72 deletions
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6
Makefile
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@@ -353,6 +353,7 @@ TESTS = $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
$(BIN)/test_f32stamp_run \
$(BIN)/test_f32arg_run \
$(BIN)/test_tuprecv_f64_run \
$(BIN)/test_modqualdestr_run \
$(BIN)/test_tupparam_run \
$(BIN)/test_structparam_run \
$(BIN)/test_structret_run \
@@ -1269,6 +1270,11 @@ $(BIN)/test_tuprecv_f64_run: test/wcc/956_tuprecv_f64_run.c $(BIN)/ww \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_modqualdestr_run: test/wcc/956_modqualdestr_run.c $(BIN)/ww \
$(BIN)/w6c $(BIN)/w6c_ww $(BIN)/w6a $(BIN)/w6l \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_tupparam_run: test/wcc/905_tupparam_run.c $(BIN)/ww \
$(BIN)/w6c $(BIN)/w6c_ww $(BIN)/w6a $(BIN)/w6l \
$(LIB)/libwwrt.a | $(BIN)