Simplify raw mode lexing by treating an unterminate /**/ comment the

same we we do an unterminated string or character literal.  This makes
it so we can guarantee that the lexer never calls into the 
preprocessor (which would be suicide for a raw lexer).

llvm-svn: 57395

1 files changed, 4 insertions, 3 deletions

diff --git a/clang/lib/Lex/Lexer.cpp b/clang/lib/Lex/Lexer.cpp
index 63bf58a12c8..44a32dbe254 100644
--- a/clang/lib/Lex/Lexer.cpp
+++ b/clang/lib/Lex/Lexer.cpp
@@ -931,7 +931,8 @@ bool Lexer::SkipBlockComment(Token &Result, const char *CurPtr) {
   unsigned char C = getCharAndSize(CurPtr, CharSize);
   CurPtr += CharSize;
   if (C == 0 && CurPtr == BufferEnd+1) {
-    Diag(BufferPtr, diag::err_unterminated_block_comment);
+    if (!LexingRawMode)
+      Diag(BufferPtr, diag::err_unterminated_block_comment);
     BufferPtr = CurPtr-1;
     return true;
   }
@@ -1000,10 +1001,10 @@ bool Lexer::SkipBlockComment(Token &Result, const char *CurPtr) {
         // If this is a /* inside of the comment, emit a warning.  Don't do this
         // if this is a /*/, which will end the comment.  This misses cases with
         // embedded escaped newlines, but oh well.
-        Diag(CurPtr-1, diag::nested_block_comment);
+        Diag(CurPtr-1, diag::warn_nested_block_comment);
       }
     } else if (C == 0 && CurPtr == BufferEnd+1) {
-      Diag(BufferPtr, diag::err_unterminated_block_comment);
+      if (!LexingRawMode) Diag(BufferPtr, diag::err_unterminated_block_comment);
       // Note: the user probably forgot a */.  We could continue immediately
       // after the /*, but this would involve lexing a lot of what really is the
       // comment, which surely would confuse the parser.