83ec2536af
try foo() catch (e) { } // legal
try foo() catch e { } // parse error with a migration hint
Same capture style as the for-loop. All four catch shapes keep working
with the parenthesized binding — block, bare-expression body, and the
== match sugar — and the no-binding forms are unchanged. onfail follows
the same rule (onfail (e) { }); its expression-cleanup form is
disambiguated by the paren-group-before-brace lookahead, so
onfail (f()); stays an expression cleanup.
AST unchanged; the printer renders the parens; the #run escape help
text updated. Corpus migrated (57 catch + 3 onfail bindings, in-source
parser test strings, specs incl. grammar rules, readme untouched —
no catch examples there).
Regression: examples/1157-diagnostics-catch-binding-needs-parens.sx;
re-captured stderr for 1010/1013/1037/1123 (migrated source echoed in
carets + help text).
31 lines
1.3 KiB
Plaintext
31 lines
1.3 KiB
Plaintext
// E6b — own-wins for an ERROR-SET name in a CLOSURE-LITERAL return annotation
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// (`closure(() -> !IoErr { … })`). `main` flat-imports `dep.sx` (which authors
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// `IoErr { Net }`) AND authors its OWN `IoErr { Disk }`. The closure literal's
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// `-> !IoErr` channel must resolve to `main`'s OWN author (own-wins), so the
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// `raise error.Disk` inside the closure body validates against main's `{ Disk }`;
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// meanwhile `dep_err` keeps dep's DISTINCT `IoErr { Net }`.
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//
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// Fail-before (attempt-1): `lowerLambda` resolved the explicit `lam.return_type`
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// through the STATELESS `type_bridge.resolveAstType`, so the closure's `!IoErr`
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// channel bound the global last-wins author (dep's `{ Net }`); `error.Disk` was
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// then "not in error set 'IoErr'" and the program exited 1.
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//
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// Pass-after: the lambda return annotation routes through the source-aware
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// `resolveTypeWithBindings` (same path as the regular function-return channel),
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// main's own `IoErr` wins, `error.Disk` validates, exit 0.
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#import "modules/std.sx";
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#import "0813-modules-same-name-error-set-lambda-own-wins/dep.sx";
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IoErr :: error { Disk }
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main :: () -> s32 {
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fail_own := closure(() -> !IoErr { raise error.Disk; });
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fail_own() catch (e) {
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if e == error.Disk { print("own=Disk\n"); }
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};
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d := dep_err();
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print("dep={}\n", d);
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return 0;
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}
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