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diff --git a/include/clang/Lex/LiteralSupport.h b/include/clang/Lex/LiteralSupport.h
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+++ b/include/clang/Lex/LiteralSupport.h
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+//===--- LiteralSupport.h ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the NumericLiteralParser, CharLiteralParser, and
+// StringLiteralParser interfaces.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CLANG_LITERALSUPPORT_H
+#define CLANG_LITERALSUPPORT_H
+
+#include <string>
+#include "llvm/ADT/SmallString.h"
+
+namespace llvm {
+  class APInt;
+  class APFloat;
+  struct fltSemantics;
+}
+
+namespace clang {
+
+class Diagnostic;
+class Preprocessor;
+class Token;
+class SourceLocation;
+class TargetInfo;
+    
+/// NumericLiteralParser - This performs strict semantic analysis of the content
+/// of a ppnumber, classifying it as either integer, floating, or erroneous,
+/// determines the radix of the value and can convert it to a useful value.
+class NumericLiteralParser {
+  Preprocessor &PP; // needed for diagnostics
+  
+  const char *const ThisTokBegin;
+  const char *const ThisTokEnd;
+  const char *DigitsBegin, *SuffixBegin; // markers
+  const char *s; // cursor
+  
+  unsigned radix;
+  
+  bool saw_exponent, saw_period;
+  
+public:
+  NumericLiteralParser(const char *begin, const char *end,
+                       SourceLocation Loc, Preprocessor &PP);
+  bool hadError;
+  bool isUnsigned;
+  bool isLong;        // This is *not* set for long long.
+  bool isLongLong;
+  bool isFloat;       // 1.0f
+  bool isImaginary;   // 1.0i
+  
+  bool isIntegerLiteral() const { 
+    return !saw_period && !saw_exponent;
+  }
+  bool isFloatingLiteral() const {
+    return saw_period || saw_exponent;
+  }
+  bool hasSuffix() const {
+    return SuffixBegin != ThisTokEnd;
+  }
+  
+  unsigned getRadix() const { return radix; }
+  
+  /// GetIntegerValue - Convert this numeric literal value to an APInt that
+  /// matches Val's input width.  If there is an overflow (i.e., if the unsigned
+  /// value read is larger than the APInt's bits will hold), set Val to the low
+  /// bits of the result and return true.  Otherwise, return false.
+  bool GetIntegerValue(llvm::APInt &Val);
+  
+  /// GetFloatValue - Convert this numeric literal to a floating value, using
+  /// the specified APFloat fltSemantics (specifying float, double, etc).
+  /// The optional bool isExact (passed-by-reference) has its value
+  /// set to true if the returned APFloat can represent the number in the
+  /// literal exactly, and false otherwise.
+  llvm::APFloat GetFloatValue(const llvm::fltSemantics &Format, 
+                              bool* isExact = NULL);
+
+private:  
+ 
+  void ParseNumberStartingWithZero(SourceLocation TokLoc);
+  
+  /// SkipHexDigits - Read and skip over any hex digits, up to End.
+  /// Return a pointer to the first non-hex digit or End.
+  const char *SkipHexDigits(const char *ptr) {
+    while (ptr != ThisTokEnd && isxdigit(*ptr))
+      ptr++;
+    return ptr;
+  }
+  
+  /// SkipOctalDigits - Read and skip over any octal digits, up to End.
+  /// Return a pointer to the first non-hex digit or End.
+  const char *SkipOctalDigits(const char *ptr) {
+    while (ptr != ThisTokEnd && ((*ptr >= '0') && (*ptr <= '7')))
+      ptr++;
+    return ptr;
+  }
+  
+  /// SkipDigits - Read and skip over any digits, up to End.
+  /// Return a pointer to the first non-hex digit or End.
+  const char *SkipDigits(const char *ptr) {
+    while (ptr != ThisTokEnd && isdigit(*ptr))
+      ptr++;
+    return ptr;
+  }
+  
+  /// SkipBinaryDigits - Read and skip over any binary digits, up to End.
+  /// Return a pointer to the first non-binary digit or End.
+  const char *SkipBinaryDigits(const char *ptr) {
+    while (ptr != ThisTokEnd && (*ptr == '0' || *ptr == '1'))
+      ptr++;
+    return ptr;
+  }
+  
+};
+
+/// CharLiteralParser - Perform interpretation and semantic analysis of a
+/// character literal.
+class CharLiteralParser {
+  uint64_t Value;
+  bool IsWide;
+  bool IsMultiChar;
+  bool HadError;
+public:
+  CharLiteralParser(const char *begin, const char *end,
+                    SourceLocation Loc, Preprocessor &PP);
+
+  bool hadError() const { return HadError; }
+  bool isWide() const { return IsWide; }
+  bool isMultiChar() const { return IsMultiChar; }
+  uint64_t getValue() const { return Value; }
+};
+
+/// StringLiteralParser - This decodes string escape characters and performs
+/// wide string analysis and Translation Phase #6 (concatenation of string
+/// literals) (C99 5.1.1.2p1).
+class StringLiteralParser {
+  Preprocessor &PP;
+  
+  unsigned MaxTokenLength;
+  unsigned SizeBound;
+  unsigned wchar_tByteWidth;
+  llvm::SmallString<512> ResultBuf;
+  char *ResultPtr; // cursor
+public:
+  StringLiteralParser(const Token *StringToks, unsigned NumStringToks,
+                      Preprocessor &PP);
+  bool hadError;
+  bool AnyWide;
+  bool Pascal;
+  
+  const char *GetString() { return &ResultBuf[0]; }
+  unsigned GetStringLength() const { return ResultPtr-&ResultBuf[0]; }
+
+  unsigned GetNumStringChars() const {
+    if (AnyWide)
+      return GetStringLength() / wchar_tByteWidth;
+    return GetStringLength();
+  }  
+  /// getOffsetOfStringByte - This function returns the offset of the
+  /// specified byte of the string data represented by Token.  This handles
+  /// advancing over escape sequences in the string.
+  static unsigned getOffsetOfStringByte(const Token &TheTok, unsigned ByteNo,
+                                        Preprocessor &PP);
+};
+  
+}  // end namespace clang
+
+#endif