From 7d39d742383ade80c9d937729bfc539c6c978845 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 9 Mar 2008 04:49:35 +0000
Subject: [PATCH] improve comment.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@48083 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Lex/PPLexerChange.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lex/PPLexerChange.cpp b/Lex/PPLexerChange.cpp
index ed4e1ebf16..c5998c93ef 100644
--- a/Lex/PPLexerChange.cpp
+++ b/Lex/PPLexerChange.cpp
@@ -29,7 +29,7 @@ PPCallbacks::~PPCallbacks() {
 //===----------------------------------------------------------------------===//
 
 /// isInPrimaryFile - Return true if we're in the top-level file, not in a
-/// #include.
+/// #include.  This looks through macro expansions and active _Pragma lexers.
 bool Preprocessor::isInPrimaryFile() const {
   if (CurLexer && !CurLexer->Is_PragmaLexer)
     return IncludeMacroStack.empty();
-- 
2.40.0