diff options
Diffstat (limited to 'src/libsyntax/ext')
| -rw-r--r-- | src/libsyntax/ext/base.rs | 3 | ||||
| -rw-r--r-- | src/libsyntax/ext/tt/macro_rules.rs | 4 |
2 files changed, 6 insertions, 1 deletions
diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs index fda026fec64..3bfa63a022d 100644 --- a/src/libsyntax/ext/base.rs +++ b/src/libsyntax/ext/base.rs @@ -765,6 +765,9 @@ impl<'a> ExtCtxt<'a> { pub fn span_bug(&self, sp: Span, msg: &str) -> ! { self.parse_sess.span_diagnostic.span_bug(sp, msg); } + pub fn span_label_without_error(&self, sp: Span, msg: &str, label: &str) { + self.parse_sess.span_diagnostic.span_label_without_error(sp, msg, label); + } pub fn bug(&self, msg: &str) -> ! { self.parse_sess.span_diagnostic.bug(msg); } diff --git a/src/libsyntax/ext/tt/macro_rules.rs b/src/libsyntax/ext/tt/macro_rules.rs index be979960725..46c49ffb24c 100644 --- a/src/libsyntax/ext/tt/macro_rules.rs +++ b/src/libsyntax/ext/tt/macro_rules.rs @@ -93,7 +93,9 @@ fn generic_extension<'cx>(cx: &'cx ExtCtxt, rhses: &[quoted::TokenTree]) -> Box<MacResult+'cx> { if cx.trace_macros() { - println!("{}! {{ {} }}", name, arg); + cx.span_label_without_error(sp, + &"trace_macro", + &format!("expands to `{}! {{ {} }}`", name, arg)); } // Which arm's failure should we report? (the one furthest along) |