From ab91b7086cceadce2cfd6a69cc90cebcdfcea07f Mon Sep 17 00:00:00 2001
From: Ted Kremenek <kremenek@apple.com>
Date: Wed, 12 Nov 2008 22:43:05 +0000
Subject: [PATCH] Move LexIncludeFilename from Lexer to PreprocessorLexer.
 PreprocessorLexer now has a virtual method "IndirectLex" which allows it to
 call the lex method of its subclasses.  This is not for performance intensive
 operations.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59185 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/Lex/Lexer.h     |  9 ++++----
 lib/Lex/PreprocessorLexer.cpp | 40 +++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+), 5 deletions(-)
 create mode 100644 lib/Lex/PreprocessorLexer.cpp

diff --git a/include/clang/Lex/Lexer.h b/include/clang/Lex/Lexer.h
index ed662d91ab..f3f8c739cf 100644
--- a/include/clang/Lex/Lexer.h
+++ b/include/clang/Lex/Lexer.h
@@ -115,6 +115,10 @@ public:
     LexTokenInternal(Result);
   }
   
+  /// IndirectLex - An indirect call to 'Lex' that can be invoked via
+  ///  the PreprocessorLexer interface.
+  void IndirectLex(Token &Result) { Lex(Result); }
+  
   /// LexFromRawLexer - Lex a token from a designated raw lexer (one with no
   /// associated preprocessor object.  Return true if the 'next character to
   /// read' pointer points and the end of the lexer buffer, false otherwise.
@@ -331,11 +335,6 @@ private:
   bool SkipBCPLComment       (Token &Result, const char *CurPtr);
   bool SkipBlockComment      (Token &Result, const char *CurPtr);
   bool SaveBCPLComment       (Token &Result, const char *CurPtr);
-  
-  /// LexIncludeFilename - After the preprocessor has parsed a #include, lex and
-  /// (potentially) macro expand the filename.  If the sequence parsed is not
-  /// lexically legal, emit a diagnostic and return a result EOM token.
-  void LexIncludeFilename(Token &Result);
 };
 
 
diff --git a/lib/Lex/PreprocessorLexer.cpp b/lib/Lex/PreprocessorLexer.cpp
new file mode 100644
index 0000000000..cbda79fd8b
--- /dev/null
+++ b/lib/Lex/PreprocessorLexer.cpp
@@ -0,0 +1,40 @@
+//===--- PreprocessorLexer.cpp - C Language Family Lexer ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements the PreprocessorLexer and Token interfaces.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Lex/PreprocessorLexer.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/SourceManager.h"
+
+using namespace clang;
+
+/// LexIncludeFilename - After the preprocessor has parsed a #include, lex and
+/// (potentially) macro expand the filename.
+void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
+  assert(ParsingPreprocessorDirective &&
+         ParsingFilename == false &&
+         "Must be in a preprocessing directive!");
+
+  // We are now parsing a filename!
+  ParsingFilename = true;
+  
+  // Lex the filename.
+  IndirectLex(FilenameTok);
+
+  // We should have obtained the filename now.
+  ParsingFilename = false;
+  
+  // No filename?
+  if (FilenameTok.is(tok::eom))
+    Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
+}
-- 
2.40.0