9984fa6b96
`raise EXPR` now terminates a failable function via the error channel. Scope (Option 2): full raise sema checks + lowering for the pure-failable shape (`-> !` / `-> !Named`); the value-carrying `-> (T..., !)` shape bails loudly, deferred to E2's error-channel tuple ABI. - lowerStmt + tryLowerAsExpr: `.raise_stmt` -> lowerRaise (also routes a raise that is a block's last statement, which previously hit unknown_expr) - lowerRaise: failable-context check (effectiveReturnType + errorChannelOf); literal membership via lowerErrorTagLiteral; variable form subset-checked via checkErrorSetSubset; pure-failable emits ret(tag) - lowerErrorTagLiteral skips membership for the bare-`!` inferred placeholder - plain `return;` in a pure-failable fn emits ret(0) (success / no error) - parser: in_defer_body flag rejects `raise` inside a `defer` body Tests: examples/219-raise.sx (positive, exit 8), examples/220-raise-rejections.sx (3 sema rejections, exit 1), inline parser test for raise-in-defer. Gates: zig build, zig build test, 258/258 examples.
18 lines
773 B
Plaintext
18 lines
773 B
Plaintext
error: error tag 'error.NotInSet' is not in error set 'ParseErr'
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--> /Users/agra/projects/sx/examples/220-raise-rejections.sx:17:11
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17 | raise error.NotInSet; // error: NotInSet not in ParseErr
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| ^^^^^^^^^^^^^^
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error: error tag 'error.Weird' is not in caller's error set 'ParseErr'
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--> /Users/agra/projects/sx/examples/220-raise-rejections.sx:24:5
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24 | raise e; // error: OtherErr not subset of ParseErr
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| ^^^^^^^^
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error: `raise` is only valid inside a failable function (a return type with `!` or `!Named`)
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--> /Users/agra/projects/sx/examples/220-raise-rejections.sx:30:5
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30 | raise error.BadDigit; // error: main (-> s32) is not failable
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| ^^^^^^^^^^^^^^^^^^^^^
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