14153671ca
9128: feat: expand procedural attribute macros r=jonas-schievink a=jonas-schievink This adds experimental support for attribute macros. They can be enabled by setting `rust-analyzer.experimental.procAttrMacros` to `true`. Known issues: * Tokens aren't remapped, presumably because we edit the input syntax tree (this causes IDE features to not work inside items with attribute macros on them) * Macro errors aren't reported correctly Closes https://github.com/rust-analyzer/rust-analyzer/issues/8971 Fixes https://github.com/rust-analyzer/rust-analyzer/issues/8964 / https://github.com/la10736/rstest/issues/120 Fixes https://github.com/rust-analyzer/rust-analyzer/issues/2984 Fixes https://github.com/rust-analyzer/rust-analyzer/issues/5412 Fixes https://github.com/rust-analyzer/rust-analyzer/issues/6029 Fixes https://github.com/rust-analyzer/rust-analyzer/issues/6687 https://github.com/rust-analyzer/rust-analyzer/issues/6740 is still not fixed – we now expand `#[proc_macro_hack]`, but fail to expand the resulting `proc_macro_call!()` macro. Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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