Files
ww/test/wcc/data/idx_compound_str_indexed/case.ww
Hojun-Cho af3c49a4c7 test: migrate 948_idx_compound to @test + runww rejects, retire C twin (fold-3)
#133 indexed-scalar compound-assign. The 21 rows split by observability:
18 value rows -> test/lang/idx_compound_test.ww (one @test fn each,
primitive-only asserts, slot-poison + neighbor-unchanged read-back);
3 reject rows -> test/wcc/data/idx_compound_{float_indexed,str_indexed,
chained_ptr_float}/case.ww as //ww:error, asserting BOTH stages reject on
the shared diagnostic body (cstage's leading prefix excluded). The C twin
is retired; its coverage is a strict superset of the original rows.

First reject-bearing fold-3 migration -- validates the runww dual-stage
home end to end. LANGBYTEID_EXPECTED_MIN 49 -> 50.
2026-06-22 16:02:01 +09:00

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//ww:error "indexed-lvalue compound on str element not wired (#133/rule-7)"
// Lifted from test/wcc/948_idx_compound_run.c reject row "he_str_indexed"
// (#133-expanded rule-7): a compound assign on an indexed STR element is
// unwired in both stages and MUST loud-fail. The substring is the FULL shared
// diagnostic body — byte-identical on both stages — pinned to "str element" so
// it cannot also match the float row (no file:line / "ww: " prefix, which
// differ cs vs ww).
package main;
export fn main() i32 = {
let a: [4]str = ["a", "b", "c", "d"];
a[0] += "x";
return 0;
};