| use rustc_ast::tokenstream::TokenStream; | |
| use rustc_ast_pretty::pprust; | |
| use rustc_expand::base::{DummyResult, ExpandResult, ExtCtxt, MacroExpanderResult}; | |
| pub fn expand_log_syntax<'cx>( | |
| _cx: &'cx mut ExtCtxt<'_>, | |
| sp: rustc_span::Span, | |
| tts: TokenStream, | |
| ) -> MacroExpanderResult<'cx> { | |
| println!("{}", pprust::tts_to_string(&tts)); | |
| // any so that `log_syntax` can be invoked as an expression and item. | |
| ExpandResult::Ready(DummyResult::any_valid(sp)) | |
| } |