Eagerly expand format_args macro
#4089
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powerboat9
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This allows format_args!(some_macro!(...), ...) to compile. gcc/rust/ChangeLog: * expand/rust-macro-builtins-format-args.cc (format_args_parse_arguments): Split format expression parsing into... (format_args_parse_expr): ...a new function here, while handling eager expansion. (MacroBuiltin::format_args_handler): Use format_args_parse_expr. gcc/testsuite/ChangeLog: * rust/compile/format_args_concat.rs: New test. Signed-off-by: Owen Avery <[email protected]>
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This is a simpler version of #4064. I think I'll probably revisit this latter, to try to improve eager expansion -- it seems like we do a lot of unnecessary
tokens -> AST -> tokens -> ASTconversions.