[PATCH] Refactor: Simplify boolean expressions in libclang

[Richard]

Hi alexfh, akyrtzi, doug.gregor, krememek, gribozavr,

Simplify boolean expresions using `true` and `false` with `clang-tidy`

http://reviews.llvm.org/D8529

Files:
  tools/libclang/CIndex.cpp

Index: tools/libclang/CIndex.cpp
===================================================================
--- tools/libclang/CIndex.cpp
+++ tools/libclang/CIndex.cpp
@@ -1718,7 +1718,7 @@
     return VJ->getKind() == DeclVisitKind;
   }
   const Decl *get() const { return static_cast<const Decl *>(data[0]); }
-  bool isFirst() const { return data[1] ? true : false; }
+  bool isFirst() const { return data[1] != nullptr; }
 };
 class TypeLocVisit : public VisitorJob {
 public:

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