1bc60d3a35
lowerEnumLiteral resolved the variant against the raw destination type,
so any non-enum destination fell into resolveVariantValue's silent
return-0 tail with the enum_init stamped as the wrong type:
- ?E destinations produced variant 0 mis-typed as the optional
(observed as variant 0 OR null, layout-dependent);
- builtin destinations (i64) silently became 0;
- unknown variants of real enums silently became variant 0;
- a destination-less literal panicked LLVM emission (unresolved
type reached codegen).
Now: optional destinations unwrap to the child enum (the coercion
layer's .optional_wrap handles E -> ?E), and the remaining shapes are
diagnosed — unknown variant (with the variant list, via the new
emitBadEnumVariant twin of emitBadVariant), non-enum destination, and
no destination (cascade-guarded: silent when the destination's type
already failed to resolve and was reported).
Regression tests: examples/0183 (return/assign/reassign into ?Enum,
non-zero variants, null path) + examples/1169/1170 (each diagnostic);
all three FAIL on pre-fix master. zig build test 426/426;
tests/run_examples.sh 598/598.
15 lines
514 B
Plaintext
15 lines
514 B
Plaintext
// Enum literals against unusable destinations are DIAGNOSED, never a
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// silent variant 0 (issue 0098's sibling holes): an unknown variant of a
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// real enum, a non-enum destination type, and a destination-less literal
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// each get their own error.
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#import "modules/std.sx";
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Platform :: enum u8 { ios; android_apk; }
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main :: () -> i32 {
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a : Platform = .nonexistent; // unknown variant: lists the real ones
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b : i64 = .foo; // non-enum destination
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print("{}{}\n", a, b);
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return 0;
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}
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