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Rollup merge of #141443 - RalfJung:c-variadic-teach-help, r=workingjubilee

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make teach_help message for cast-before-pass-to-variadic more precise

r? `@workingjubilee`
based on your comment [here](https://github.com/rust-lang/rust/issues/44930#issuecomment-2199663198)
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Guillaume Gomez 2025-05-25 15:11:47 +02:00 • committed by GitHub
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compiler/rustc_hir_typeck/messages.ftl
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@ -169,7 +169,7 @@ hir_typeck_option_result_copied = use `{$def_path}::copied` to copy the value in
hir_typeck_pass_to_variadic_function = can't pass `{$ty}` to variadic function
.suggestion = cast the value to `{$cast_ty}`
.teach_help = certain types, like `{$ty}`, must be casted before passing them to a variadic function, because of arcane ABI rules dictated by the C standard
.teach_help = certain types, like `{$ty}`, must be cast before passing them to a variadic function to match the implicit cast that a C compiler would perform as part of C's numeric promotion rules
hir_typeck_ptr_cast_add_auto_to_object = cannot add {$traits_len ->
[1] auto trait {$traits}