MC/AsmParser: Move .lsym parsing to Darwin specific parser.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108176 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCParser/AsmParser.h

@@ -138,7 +138,6 @@ private:
   bool ParseDirectiveSymbolAttribute(MCSymbolAttr Attr);
   bool ParseDirectiveELFType(); // ELF specific ".type"
   bool ParseDirectiveDarwinSymbolDesc(); // Darwin specific ".desc"
-  bool ParseDirectiveDarwinLsym(); // Darwin specific ".lsym"
 
   bool ParseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
   bool ParseDirectiveDarwinZerofill(); // Darwin specific ".zerofill"

include/llvm/MC/MCParser/MCAsmParser.h

@@ -73,6 +73,10 @@ public:
   /// \brief Report an error at the current lexer location.
   bool TokError(const char *Msg);
 
+  /// ParseIdentifier - Parse an identifier or string (as a quoted identifier)
+  /// and set \arg Res to the identifier contents.
+  virtual bool ParseIdentifier(StringRef &Res) = 0;
+
   /// ParseExpression - Parse an arbitrary expression.
   ///
   /// @param Res - The value of the expression. The result is undefined