[LLVMbugs] [Bug 23311] New: Can't compile Clang on windows using Visual Studio 2015 preview

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23311

            Bug ID: 23311
           Summary: Can't compile Clang on windows using Visual Studio
                    2015 preview
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: libclang
          Assignee: unassignedclangbugs at nondot.org
          Reporter: ernest.galbrun at gmail.com
                CC: klimek at google.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

When trying to compile clang with Visual Studio 2015 preview, I get the
following error when compiling RecordLayoutBuilder.cpp (in clangAST) :

RecordLayoutBuilder.cpp(2981) error C2678: binary '==': no operator found which
takes a left-hand operand of type
'llvm::DenseMapIterator<KeyT,ValueT,KeyInfoT,BucketT,false>' (or there is no
acceptable conversion) (...) while trying to match the argument list
'(llvm::DenseMapIterator<KeyT,ValueT,KeyInfoT,BucketT,false>,
llvm::DenseMapIterator<KeyT,ValueT,KeyInfoT,BucketT,false>)'

The compiler seem to complain because the egality-comparison operator is only
defined for RHS maps of type
llvm::DenseMapIterator<KeyT,ValueT,KeyInfoT,BucketT,true>

I have solved the problem by replacing the comparison operator in DenseMap.h,
lines 1039-1054 so that they can take input of any DenseMapIterator, not only
ConstIterator.

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