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rust/tests/ui/proc-macro/auxiliary/included-file.txt

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proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
2021-07-18 15:53:06 -04:00
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