From f7240e1c74fd19d09e183cedc7dd569c59a4bbd5 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Mon, 3 Sep 2018 22:24:11 +0200
Subject: Improve error display for codeblocks in rustdoc

---
 src/libsyntax/parse/lexer/mod.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/libsyntax/parse')

diff --git a/src/libsyntax/parse/lexer/mod.rs b/src/libsyntax/parse/lexer/mod.rs
index aa47d5bf669..7132dc342d2 100644
--- a/src/libsyntax/parse/lexer/mod.rs
+++ b/src/libsyntax/parse/lexer/mod.rs
@@ -238,6 +238,17 @@ impl<'a> StringReader<'a> {
         sr
     }
 
+    pub fn new_without_err(sess: &'a ParseSess,
+                           source_file: Lrc<syntax_pos::SourceFile>,
+                           override_span: Option<Span>) -> Result<Self, ()> {
+        let mut sr = StringReader::new_raw(sess, source_file, override_span);
+        if sr.advance_token().is_err() {
+            sr.emit_fatal_errors();
+            return Err(());
+        }
+        Ok(sr)
+    }
+
     pub fn retokenize(sess: &'a ParseSess, mut span: Span) -> Self {
         let begin = sess.source_map().lookup_byte_offset(span.lo());
         let end = sess.source_map().lookup_byte_offset(span.hi());
-- 
cgit 1.4.1-3-g733a5