From 9ba42085dac878f3ae6fc15345c43796d5122d00 Mon Sep 17 00:00:00 2001
From: David Greene <greened@obbligato.org>
Date: Wed, 19 Oct 2011 13:03:35 +0000
Subject: Add Peek

Add a peek function to let the Lexer look at a character arbitrarily
far ahead in the stream without consuming anything.  We need this to
disambiguate numbers and operands of a paste operation.  For example:

def foo#8i

Without lookahead the lexer will treat '8' as a number rather than as
part of a string to be pasted to form an identifier.

llvm-svn: 142512
---
 llvm/lib/TableGen/TGLexer.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'llvm/lib/TableGen/TGLexer.h')

diff --git a/llvm/lib/TableGen/TGLexer.h b/llvm/lib/TableGen/TGLexer.h
index 84d328b12d9..24f8ea4ce5a 100644
--- a/llvm/lib/TableGen/TGLexer.h
+++ b/llvm/lib/TableGen/TGLexer.h
@@ -109,6 +109,7 @@ private:
   tgtok::TokKind ReturnError(const char *Loc, const Twine &Msg);
   
   int getNextChar();
+  int peekNextChar(int Index);
   void SkipBCPLComment();
   bool SkipCComment();
   tgtok::TokKind LexIdentifier();
-- 
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