r346144 - [Format] Add debugging to ObjC language guesser

[Ben Hamilton via cfe-commits]

Author: benhamilton
Date: Mon Nov  5 08:59:33 2018
New Revision: 346144

URL: http://llvm.org/viewvc/llvm-project?rev=346144&view=rev
Log:
[Format] Add debugging to ObjC language guesser

Summary:
To handle diagnosing bugs where ObjCHeaderStyleGuesser guesses
wrong, this diff adds a bit more debug logging to the Objective-C
language guesser.

Reviewers: krasimir

Reviewed By: krasimir

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D54110

Modified:
    cfe/trunk/lib/Format/Format.cpp

Modified: cfe/trunk/lib/Format/Format.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Format/Format.cpp?rev=346144&r1=346143&r2=346144&view=diff
==============================================================================
--- cfe/trunk/lib/Format/Format.cpp (original)
+++ cfe/trunk/lib/Format/Format.cpp Mon Nov  5 08:59:33 2018
@@ -1504,7 +1504,8 @@ public:
           SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
           FormatTokenLexer &Tokens) override {
     assert(Style.Language == FormatStyle::LK_Cpp);
-    IsObjC = guessIsObjC(AnnotatedLines, Tokens.getKeywords());
+    IsObjC = guessIsObjC(Env.getSourceManager(), AnnotatedLines,
+                         Tokens.getKeywords());
     tooling::Replacements Result;
     return {Result, 0};
   }
@@ -1512,8 +1513,10 @@ public:
   bool isObjC() { return IsObjC; }
 
 private:
-  static bool guessIsObjC(const SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
-                          const AdditionalKeywords &Keywords) {
+  static bool
+  guessIsObjC(const SourceManager &SourceManager,
+              const SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
+              const AdditionalKeywords &Keywords) {
     // Keep this array sorted, since we are binary searching over it.
     static constexpr llvm::StringLiteral FoundationIdentifiers[] = {
         "CGFloat",
@@ -1604,9 +1607,15 @@ private:
                                TT_ObjCBlockLBrace, TT_ObjCBlockLParen,
                                TT_ObjCDecl, TT_ObjCForIn, TT_ObjCMethodExpr,
                                TT_ObjCMethodSpecifier, TT_ObjCProperty)) {
+          LLVM_DEBUG(llvm::dbgs()
+                     << "Detected ObjC at location "
+                     << FormatTok->Tok.getLocation().printToString(
+                            SourceManager)
+                     << " token: " << FormatTok->TokenText << " token type: "
+                     << getTokenTypeName(FormatTok->Type) << "\n");
           return true;
         }
-        if (guessIsObjC(Line->Children, Keywords))
+        if (guessIsObjC(SourceManager, Line->Children, Keywords))
           return true;
       }
     }