From: Alp Toker <alp@nuanti.com>
Date: Thu, 5 Dec 2013 03:41:20 +0000 (+0000)
Subject: Add an assert to make it clear we're on the first line
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a2671931cbcf245390281162037628776a5ecfb9;p=clang

Add an assert to make it clear we're on the first line

A raw lexer in its initial state is guaranteed to be on line number one.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196461 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Rewrite/Frontend/InclusionRewriter.cpp b/lib/Rewrite/Frontend/InclusionRewriter.cpp
index 176ea3f79d..16c6d86f73 100644
--- a/lib/Rewrite/Frontend/InclusionRewriter.cpp
+++ b/lib/Rewrite/Frontend/InclusionRewriter.cpp
@@ -363,9 +363,11 @@ bool InclusionRewriter::Process(FileID FileId,
   if (SM.getFileIDSize(FileId) == 0)
     return false;
 
+  SourceLocation StartLoc = RawLex.getSourceLocation();
   // The next byte to be copied from the source file, which may be non-zero if
   // the lexer handled a BOM.
-  unsigned NextToWrite = SM.getFileOffset(RawLex.getSourceLocation());
+  unsigned NextToWrite = SM.getFileOffset(StartLoc);
+  assert(SM.getPresumedLoc(StartLoc).getLine() == 1);
   int Line = 1; // The current input file line number.
 
   Token RawToken;