From: Robert Griesemer <gri@golang.org>
Date: Thu, 15 Apr 2010 04:33:34 +0000 (-0700)
Subject: scanner: implement Peek() to look at the next char w/o advancing
X-Git-Tag: weekly.2010-04-27~89
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=0fd00c8bb7ae67cc625cf8b2d04efb21f6958648;p=gostls13.git

scanner: implement Peek() to look at the next char w/o advancing

R=rsc
CC=golang-dev
https://golang.org/cl/840045
---

diff --git a/src/pkg/scanner/scanner.go b/src/pkg/scanner/scanner.go
index 25544f667e..f60a4eed27 100644
--- a/src/pkg/scanner/scanner.go
+++ b/src/pkg/scanner/scanner.go
@@ -282,6 +282,14 @@ func (s *Scanner) Next() int {
 }
 
 
+// Peek returns the next Unicode character in the source without advancing
+// the scanner. It returns EOF if the scanner's position is at the last
+// character of the source.
+func (s *Scanner) Peek() int {
+	return s.ch
+}
+
+
 func (s *Scanner) error(msg string) {
 	s.ErrorCount++
 	if s.Error != nil {