Cleanup check_cast. Fixes #21554 #21606
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This also makes the cast error messages somewhat more uniform.
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| @@ -3128,7 +3128,6 @@ pub fn type_is_scalar(ty: Ty) -> bool { | |||
| ty_bool | ty_char | ty_int(_) | ty_float(_) | ty_uint(_) | | |||
| ty_infer(IntVar(_)) | ty_infer(FloatVar(_)) | | |||
| ty_bare_fn(..) | ty_ptr(_) => true, | |||
| ty_tup(ref tys) if tys.is_empty() => true, | |||
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It seems to me that this might have non-local consequence, beyond just changing these error messages slightly, maybe just changing the internals of the cast checking would be more reliable?
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Unit structs aren't scalars. Unit enums aren't scalars. ((),) isn't a scalar. I checked the other places that use this function – they don't care.
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r? @huonw |
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This also makes the cast error messages somewhat more uniform.
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This also makes the cast error messages somewhat more uniform.