diff options
Diffstat (limited to 'compiler/rustc_builtin_macros/src/log_syntax.rs')
-rw-r--r-- | compiler/rustc_builtin_macros/src/log_syntax.rs | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/compiler/rustc_builtin_macros/src/log_syntax.rs b/compiler/rustc_builtin_macros/src/log_syntax.rs new file mode 100644 index 000000000..ede34a761 --- /dev/null +++ b/compiler/rustc_builtin_macros/src/log_syntax.rs @@ -0,0 +1,14 @@ +use rustc_ast::tokenstream::TokenStream; +use rustc_ast_pretty::pprust; +use rustc_expand::base; + +pub fn expand_log_syntax<'cx>( + _cx: &'cx mut base::ExtCtxt<'_>, + sp: rustc_span::Span, + tts: TokenStream, +) -> Box<dyn base::MacResult + 'cx> { + println!("{}", pprust::tts_to_string(&tts)); + + // any so that `log_syntax` can be invoked as an expression and item. + base::DummyResult::any_valid(sp) +} |