Add some const_casts in places where we were implicitly casting away constness. No functional change, but now they're explicit

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@305410 91177308-0d34-0410-b5e6-96231b3b80d8

include/__functional_03

@@ -704,7 +704,7 @@ function<_Rp()>::target()
 {
     if (__f_ == 0)
         return (_Tp*)0;
-    return (_Tp*)__f_->target(typeid(_Tp));
+    return (_Tp*) const_cast<void *>(__f_->target(typeid(_Tp)));
 }
 
 template<class _Rp>
@@ -980,7 +980,7 @@ function<_Rp(_A0)>::target()
 {
     if (__f_ == 0)
         return (_Tp*)0;
-    return (_Tp*)__f_->target(typeid(_Tp));
+    return (_Tp*) const_cast<void *>(__f_->target(typeid(_Tp)));
 }
 
 template<class _Rp, class _A0>
@@ -1256,7 +1256,7 @@ function<_Rp(_A0, _A1)>::target()
 {
     if (__f_ == 0)
         return (_Tp*)0;
-    return (_Tp*)__f_->target(typeid(_Tp));
+    return (_Tp*) const_cast<void *>(__f_->target(typeid(_Tp)));
 }
 
 template<class _Rp, class _A0, class _A1>
@@ -1532,7 +1532,7 @@ function<_Rp(_A0, _A1, _A2)>::target()
 {
     if (__f_ == 0)
         return (_Tp*)0;
-    return (_Tp*)__f_->target(typeid(_Tp));
+    return (_Tp*) const_cast<void *>(__f_->target(typeid(_Tp)));
 }
 
 template<class _Rp, class _A0, class _A1, class _A2>

include/fstream

@@ -617,7 +617,7 @@ basic_filebuf<_CharT, _Traits>::underflow()
                                  static_cast<size_t>(__extbufend_ - __extbufnext_));
             codecvt_base::result __r;
             __st_last_ = __st_;
-            size_t __nr = fread((void*)__extbufnext_, 1, __nmemb, __file_);
+            size_t __nr = fread((void*) const_cast<char *>(__extbufnext_), 1, __nmemb, __file_);
             if (__nr != 0)
             {
                 if (!__cv_)
@@ -630,7 +630,8 @@ basic_filebuf<_CharT, _Traits>::underflow()
                                        this->eback() + __ibs_, __inext);
                 if (__r == codecvt_base::noconv)
                 {
-                    this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)__extbufend_);
+                    this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, 
+                                          (char_type*)const_cast<char *>(__extbufend_));
                     __c = traits_type::to_int_type(*this->gptr());
                 }
                 else if (__inext != this->eback() + __unget_sz)
@@ -722,7 +723,7 @@ basic_filebuf<_CharT, _Traits>::overflow(int_type __c)
                         return traits_type::eof();
                     if (__r == codecvt_base::partial)
                     {
-                        this->setp((char_type*)__e, this->pptr());
+                        this->setp(const_cast<char_type*>(__e), this->pptr());
                         this->pbump(this->epptr() - this->pbase());
                     }
                 }

include/functional

@@ -1941,8 +1941,8 @@ _Tp*
 function<_Rp(_ArgTypes...)>::target() _NOEXCEPT
 {
     if (__f_ == 0)
-        return (_Tp*)0;
-    return (_Tp*)__f_->target(typeid(_Tp));
+        return nullptr;
+    return (_Tp*) const_cast<void *>(__f_->target(typeid(_Tp)));
 }
 
 template<class _Rp, class ..._ArgTypes>
@@ -1951,7 +1951,7 @@ const _Tp*
 function<_Rp(_ArgTypes...)>::target() const _NOEXCEPT
 {
     if (__f_ == 0)
-        return (const _Tp*)0;
+        return nullptr;
     return (const _Tp*)__f_->target(typeid(_Tp));
 }
 

include/locale

@@ -3960,7 +3960,8 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::underflow()
                                        this->egptr(), __inext);
                 if (__r == codecvt_base::noconv)
                 {
-                    this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)__extbufend_);
+                    this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, 
+                               (char_type*) const_cast<char *>(__extbufend_));
                     __c = *this->gptr();
                 }
                 else if (__inext != this->eback() + __unget_sz)
@@ -4048,7 +4049,7 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::overflow(int_type __c)
                         return traits_type::eof();
                     if (__r == codecvt_base::partial)
                     {
-                        this->setp((char_type*)__e, this->pptr());
+                        this->setp(const_cast<char_type *>(__e), this->pptr());
                         this->pbump(this->epptr() - this->pbase());
                     }
                 }

test/support/allocators.h

@@ -104,7 +104,7 @@ public:
     T* allocate(std::size_t, const void* hint)
     {
         allocate_called = true;
-        return (T*)hint;
+        return (T*) const_cast<void *>(hint);
     }
 };