Introduce proc_macro::Span::source_text

2018-11-08 10:07:02 +01:00
parent d48ab693d1
commit e88b0d9a94
5 changed files with 59 additions and 2 deletions
--- a/src/libsyntax_ext/proc_macro_server.rs
+++ b/src/libsyntax_ext/proc_macro_server.rs
@@ -748,4 +748,7 @@ impl server::Span for Rustc<'_> {
    fn resolved_at(&mut self, span: Self::Span, at: Self::Span) -> Self::Span {
        span.with_ctxt(at.ctxt())
    }
+    fn source_text(&mut self,  span: Self::Span) -> Option<String> {
+        self.sess.source_map().span_to_snippet(span).ok()
+    }
 }