[LLVMbugs] [Bug 22444] New: [MSVC] 'mutable' must be allowed to be applied to references

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22444

            Bug ID: 22444
           Summary: [MSVC] 'mutable' must be allowed to be applied to
                    references
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: a.bataev at gmx.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

#include <future>

int main (){
return 0;
}

Standart c++ header <future> includes  <ppltasks.h> (line 18). <ppltasks.h> in
it's turn uses header 
<ppl.h>(line 21), where such definition appears: 

    mutable _Combinable_type &_Combinable; // (line 4151: column 5)

In such definition keyword mutable is applied to a reference type despite the
fact that it violates C++11 standart:
"The mutable specifier shall appear only in the declaration of a non-static
data member (9.2) whose type is
neither const-qualified nor a reference type."  (C++11 standart: 7.1.1 Storage
class specifiers)

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