Hojun-Cho
411515a83b
Four seams from one review cluster, all landing on the same checker files; gates ran on the union (rule 11 body). ?-subset: the wwstage walk compared `...spread` ALIAS nodes on both sides of the error-subset check, falsely rejecting a spread-carried error return (`(i64 | ...errs)`, cs-accept/ww-reject) — both sides now flatten like trycountvariants (cstage Tparams are pre-flattened at type level). Multi-let/multi-assign: the tuple gates keyed on the RAW rhs kind, rejecting a NAMED tuple alias (`type pair = (i64,i64)`; cs clean- reject, ww asserttyped stop) — both stages chase per #99 alias transparency, wwstage rettupleof peels the alias so cgmassign keeps the str element's len/cap stores, and the catA massign-alias error pin re-rules to a run fixture. The N_MLET diagnostic also printed its operands swapped (elem/declared reversed vs its wording). Yield: match_yield_type didn't descend into N_SWITCH, so a yield inside a switch arm typed the match void and dropped the value (both stages); and a stray yield outside any match arm reached cgen unchecked — both stages now gate on a match-arm counter (the c->loops discipline).
22 lines
491 B
Plaintext
22 lines
491 B
Plaintext
//ww:run-exit 0
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// A yield inside a switch arm yields from the enclosing MATCH; the
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// match-yield walk didn't descend into N_SWITCH, so the match typed
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// void and the yielded value was dropped.
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package main;
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fn pick(v: (i32 | str)) i32 = {
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let r: i32 = match (v) {
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case let x: i32 =>
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switch (x) {
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case 2: yield 42;
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case: yield 7;
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};
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case let s: str => yield 0;
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};
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return r;
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};
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export fn main() i32 = {
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let u: (i32 | str) = 2;
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if (pick(u) == 42) { return 0; };
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return 1;
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};
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