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ww/test/wcc/data/dotfield_compound_float/case.ww
Hojun-Cho 057e805cf0 test: migrate dotfield/idxfield compound-assign to @test + runww rejects, retire C twins (fold-3)
949_dotfield_compound + 949_idxfield_compound are one bug class (#133-lineage compound-assign load-op-store on field lvalues; #34/#33, #263 carve-out) sharing the combine + hard-error path, so the two C carriers fuse into one commit: 26 value rows -> test/lang @test row-tables (primitive-only asserts), 8 reject rows -> runww //ww:error dual-stage carriers. byteid floor 50->52.
2026-06-22 16:34:33 +09:00

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//ww:error "single-dot field compound on float field"
// Lifted from test/wcc/949_dotfield_compound_run.c reject row "dotfld_he_float"
// (#34/rule-7): a compound assign on a single-dot FLOAT field is unwired in
// both stages and MUST loud-fail, not silently demote to a plain store. The
// substring is the shared diagnostic body — byte-identical on both stages,
// pinned to "float field" so it cannot also match the str/slice/tagged rows
// (no file:line, no cstage "ww: " prefix — both differ cs vs ww).
package main;
type S = struct { f: f64, g: int };
export fn main() i32 = {
let s: S = S{f=1.0, g=0};
s.f *= 2.0;
return 0;
};