documentation parsing. Patch to do typo correction for

documentation commands. Patch was reviewed, along with
great suggestions for improvement, by Doug. 
// rdar://12381408

llvm-svn: 181458

1 files changed, 12 insertions, 2 deletions

diff --git a/clang/lib/AST/CommentLexer.cpp b/clang/lib/AST/CommentLexer.cpp
index 70410d61085..a59badaeaf1 100644
--- a/clang/lib/AST/CommentLexer.cpp
+++ b/clang/lib/AST/CommentLexer.cpp
@@ -265,6 +265,7 @@ const char *findCCommentEnd(const char *BufferPtr, const char *BufferEnd) {
   }
   llvm_unreachable("buffer end hit before '*/' was seen");
 }
+    
 } // unnamed namespace
 
 void Lexer::lexCommentText(Token &T) {
@@ -354,8 +355,17 @@ void Lexer::lexCommentText(Token &T) {
         if (!Info) {
           formTokenWithChars(T, TokenPtr, tok::unknown_command);
           T.setUnknownCommandName(CommandName);
-          Diag(T.getLocation(), diag::warn_unknown_comment_command_name);
-          return;
+          if (Info = Traits.getTypoCorrectCommandInfo(CommandName)) {
+            StringRef CorrectedName = Info->Name;
+            SourceRange CommandRange(T.getLocation().getLocWithOffset(1),
+                                     T.getEndLocation());
+            Diag(T.getLocation(), diag::warn_correct_comment_command_name)
+              << CommandName << CorrectedName
+              << FixItHint::CreateReplacement(CommandRange, CorrectedName);
+          } else {
+            Diag(T.getLocation(), diag::warn_unknown_comment_command_name);
+            return;
+          }
         }
         if (Info->IsVerbatimBlockCommand) {
           setupAndLexVerbatimBlock(T, TokenPtr, *BufferPtr, Info);