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.
12 lines
509 B
Plaintext
12 lines
509 B
Plaintext
error: 'nonexistent' is not a variant of 'Platform' (variants are: ios, android_apk)
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--> examples/1169-diagnostics-enum-literal-bad-target.sx:10:20
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10 | a : Platform = .nonexistent; // unknown variant: lists the real ones
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| ^^^^^^^^^^^^
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error: enum literal '.foo' cannot type itself from non-enum destination 'i64'
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--> examples/1169-diagnostics-enum-literal-bad-target.sx:11:15
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11 | b : i64 = .foo; // non-enum destination
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| ^^^^
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