Removing LLVM_EXPLICIT, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229335 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/IntervalMap.h

@@ -496,7 +496,7 @@ public:
   NodeRef() {}
 
   /// operator bool - Detect a null ref.
-  LLVM_EXPLICIT operator bool() const { return pip.getOpaqueValue(); }
+  explicit operator bool() const { return pip.getOpaqueValue(); }
 
   /// NodeRef - Create a reference to the node p with n elements.
   template <typename NodeT>

include/llvm/ADT/IntrusiveRefCntPtr.h

@@ -177,7 +177,7 @@ public:
 
     T* get() const { return Obj; }
 
-    LLVM_EXPLICIT operator bool() const { return Obj; }
+    explicit operator bool() const { return Obj; }
 
     void swap(IntrusiveRefCntPtr& other) {
       T* tmp = other.Obj;

include/llvm/ADT/Optional.h

@@ -121,7 +121,7 @@ public:
   const T& getValue() const LLVM_LVALUE_FUNCTION { assert(hasVal); return *getPointer(); }
   T& getValue() LLVM_LVALUE_FUNCTION { assert(hasVal); return *getPointer(); }
 
-  LLVM_EXPLICIT operator bool() const { return hasVal; }
+  explicit operator bool() const { return hasVal; }
   bool hasValue() const { return hasVal; }
   const T* operator->() const { return getPointer(); }
   T* operator->() { return getPointer(); }

include/llvm/ADT/PointerUnion.h

@@ -111,7 +111,7 @@ namespace llvm {
       // we recursively strip off low bits if we have a nested PointerUnion.
       return !PointerLikeTypeTraits<PT1>::getFromVoidPointer(Val.getPointer());
     }
-    LLVM_EXPLICIT operator bool() const { return !isNull(); }
+    explicit operator bool() const { return !isNull(); }
 
     /// is<T>() return true if the Union currently holds the type matching T.
     template<typename T>
@@ -271,7 +271,7 @@ namespace llvm {
     /// isNull - Return true if the pointer held in the union is null,
     /// regardless of which type it is.
     bool isNull() const { return Val.isNull(); }
-    LLVM_EXPLICIT operator bool() const { return !isNull(); }
+    explicit operator bool() const { return !isNull(); }
 
     /// is<T>() return true if the Union currently holds the type matching T.
     template<typename T>
@@ -385,7 +385,7 @@ namespace llvm {
     /// isNull - Return true if the pointer held in the union is null,
     /// regardless of which type it is.
     bool isNull() const { return Val.isNull(); }
-    LLVM_EXPLICIT operator bool() const { return !isNull(); }
+    explicit operator bool() const { return !isNull(); }
 
     /// is<T>() return true if the Union currently holds the type matching T.
     template<typename T>

include/llvm/Analysis/InlineCost.h

@@ -77,7 +77,7 @@ public:
   }
 
   /// \brief Test whether the inline cost is low enough for inlining.
-  LLVM_EXPLICIT operator bool() const {
+  explicit operator bool() const {
     return Cost < Threshold;
   }
 

include/llvm/CodeGen/SelectionDAGNodes.h

@@ -145,7 +145,7 @@ public:
   bool operator<(const SDValue &O) const {
     return std::tie(Node, ResNo) < std::tie(O.Node, O.ResNo);
   }
-  LLVM_EXPLICIT operator bool() const {
+  explicit operator bool() const {
     return Node != nullptr;
   }
 

include/llvm/CodeGen/SlotIndexes.h

@@ -162,7 +162,7 @@ namespace llvm {
     }
 
     /// Return true for a valid index.
-    LLVM_EXPLICIT operator bool() const { return isValid(); }
+    explicit operator bool() const { return isValid(); }
 
     /// Print this index to the given raw_ostream.
     void print(raw_ostream &os) const;

include/llvm/ExecutionEngine/Orc/JITSymbol.h

@@ -34,7 +34,7 @@ public:
       : CachedAddr(0), GetAddress(std::move(GetAddress)) {}
 
   /// @brief Returns true if the symbol exists, false otherwise.
-  LLVM_EXPLICIT operator bool() const { return CachedAddr || GetAddress; }
+  explicit operator bool() const { return CachedAddr || GetAddress; }
 
   /// @brief Get the address of the symbol in the target address space. Returns
   ///        '0' if the symbol does not exist.

include/llvm/IR/CallSite.h

@@ -78,7 +78,7 @@ public:
 
   InstrTy *getInstruction() const { return I.getPointer(); }
   InstrTy *operator->() const { return I.getPointer(); }
-  LLVM_EXPLICIT operator bool() const { return I.getPointer(); }
+  explicit operator bool() const { return I.getPointer(); }
 
   /// getCalledValue - Return the pointer to function that is being called.
   ///

include/llvm/IR/DebugInfo.h

@@ -186,7 +186,7 @@ public:
   // FIXME: This operator bool isn't actually protecting anything at the
   // moment due to the conversion operator above making DIDescriptor nodes
   // implicitly convertable to bool.
-  LLVM_EXPLICIT operator bool() const { return DbgNode != nullptr; }
+  explicit operator bool() const { return DbgNode != nullptr; }
 
   bool operator==(DIDescriptor Other) const { return DbgNode == Other.DbgNode; }
   bool operator!=(DIDescriptor Other) const { return !operator==(Other); }

include/llvm/IR/Metadata.h

@@ -512,7 +512,7 @@ struct AAMDNodes {
 
   bool operator!=(const AAMDNodes &A) const { return !(*this == A); }
 
-  LLVM_EXPLICIT operator bool() const { return TBAA || Scope || NoAlias; }
+  explicit operator bool() const { return TBAA || Scope || NoAlias; }
 
   /// \brief The tag for type-based alias analysis.
   MDNode *TBAA;

include/llvm/Support/Compiler.h

@@ -339,16 +339,6 @@
 # define LLVM_IS_UNALIGNED_ACCESS_FAST 0
 #endif
 
-/// \macro LLVM_EXPLICIT
-/// \brief Expands to explicit on compilers which support explicit conversion
-/// operators. Otherwise expands to nothing.
-#if __has_feature(cxx_explicit_conversions) || \
-    defined(__GXX_EXPERIMENTAL_CXX0X__)
-#define LLVM_EXPLICIT explicit
-#else
-#define LLVM_EXPLICIT
-#endif
-
 /// \brief Does the compiler support generalized initializers (using braced
 /// lists and std::initializer_list).  While clang may claim it supports general
 /// initializers, if we're using MSVC's headers, we might not have a usable

include/llvm/Support/ErrorOr.h

@@ -168,7 +168,7 @@ public:
   }
 
   /// \brief Return false if there is an error.
-  LLVM_EXPLICIT operator bool() const {
+  explicit operator bool() const {
     return !HasError;
   }
 

include/llvm/Support/StringPool.h

@@ -129,7 +129,7 @@ namespace llvm {
     }
 
     inline const char *operator*() const { return begin(); }
-    inline LLVM_EXPLICIT operator bool() const { return S != nullptr; }
+    inline explicit operator bool() const { return S != nullptr; }
 
     inline bool operator==(const PooledStringPtr &That) const { return S == That.S; }
     inline bool operator!=(const PooledStringPtr &That) const { return S != That.S; }

lib/Support/Windows/WindowsSupport.h

@@ -92,7 +92,7 @@ public:
   }
 
   // True if Handle is valid.
-  LLVM_EXPLICIT operator bool() const {
+  explicit operator bool() const {
     return HandleTraits::IsValid(Handle) ? true : false;
   }
 

lib/Target/SystemZ/SystemZElimCompare.cpp

@@ -47,7 +47,7 @@ struct Reference {
     return *this;
   }
 
-  LLVM_EXPLICIT operator bool() const { return Def || Use; }
+  explicit operator bool() const { return Def || Use; }
 
   // True if the register is defined or used in some form, either directly or
   // via a sub- or super-register.

lib/Target/SystemZ/SystemZInstrInfo.cpp

@@ -633,7 +633,7 @@ struct LogicOp {
   LogicOp(unsigned regSize, unsigned immLSB, unsigned immSize)
     : RegSize(regSize), ImmLSB(immLSB), ImmSize(immSize) {}
 
-  LLVM_EXPLICIT operator bool() const { return RegSize; }
+  explicit operator bool() const { return RegSize; }
 
   unsigned RegSize, ImmLSB, ImmSize;
 };

unittests/Support/Casting.cpp

@@ -250,7 +250,7 @@ class PTy {
   Base *B;
 public:
   PTy(Base *B) : B(B) {}
-  LLVM_EXPLICIT operator bool() const { return get(); }
+  explicit operator bool() const { return get(); }
   Base *get() const { return B; }
 };