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wcc/check: reject self-import, both stages (#16 ENFORCE-checker)

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check-(c): a package importing itself (any spelling) is a hard error,
mirroring Go. Predicate is leaf==owner at the N_USE/installdecl seam —
sound only after the PREP commits (dotted-test renames, package-less
boundary directive). Identical wording both stages; diagnostics-only,
byte-id-neutral. 948 pins the reject in both compilers; 708's
pos_selfimp (which pinned the abolished self-import skip) converts to
neg_selfimp + new pos_crossmod preserving the param-shadow tolerance
the case existed for. Checks (a) unused and (b)/(d) name-membership
stay deferred to the multi-package arc: imports are filename-keyed
pulls, so those need import->file provenance this compiler lacks.
This commit is contained in:
Hojun-Cho
2026-06-10 15:18:58 +09:00
parent 49a5173f3f
commit 9f8df525c2
10 changed files with 266 additions and 35 deletions
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9
Makefile
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@@ -234,7 +234,8 @@ TESTS = $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
$(BIN)/test_w6l $(BIN)/test_data_link \
$(BIN)/test_arch \
$(BIN)/test_e2e $(BIN)/test_ffi $(BIN)/test_dyn $(BIN)/test_stdlib \
$(BIN)/test_at_test $(BIN)/test_let_global $(BIN)/test_def_neg_global \
$(BIN)/test_at_test $(BIN)/test_selfimport \
$(BIN)/test_let_global $(BIN)/test_def_neg_global \
$(BIN)/test_def_const_fold \
$(BIN)/test_int_cast_signed $(BIN)/test_dot_chain \
$(BIN)/test_amp_dot $(BIN)/test_arr_elem_field \
@@ -594,6 +595,10 @@ $(BIN)/test_at_test: test/wcc/910_at_test.c $(BIN)/ww $(BIN)/w6c $(BIN)/w6a \
$(BIN)/w6l $(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_selfimport: test/wcc/948_selfimport.c $(BIN)/w6c $(BIN)/w6c_ww \
| $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_let_global: test/wcc/630_let_global.c $(BIN)/ww $(BIN)/w6c \
$(BIN)/w6a $(BIN)/w6l $(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
@@ -928,7 +933,7 @@ $(BIN)/test_cgreturn_variant_zero: test/wcc/707_cgreturn_variant_zero.c \
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_param_shadow_mod: test/wcc/708_param_shadow_mod.c \
$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(BIN)/ww $(BIN)/w6c $(BIN)/w6c_ww $(BIN)/w6a $(BIN)/w6l \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<