[LLVMbugs] [Bug 10644] New: clang considers a method with rvalue reference ambiguous

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10644

           Summary: clang considers a method with rvalue reference
                    ambiguous
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++0x
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: rafael.espindola at gmail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


g++ 4.6 with -std=c++0x compiles:

struct string {
  string(const char* __s);
};
struct map {
  int& operator[](const string& __k);
  int& operator[](const string&& __k);
};
void foo() {
  static map key_map;
  key_map["line"];
}

but clang doesn't:

tracked_objects.ii:10:10: error: use of overloaded operator '[]' is ambiguous
(with operand types 'map' and 'const char [5]')
  key_map["line"];
  ~~~~~~~^~~~~~~
tracked_objects.ii:5:8: note: candidate function
  int& operator[](const string& __k);
       ^
tracked_objects.ii:6:8: note: candidate function
  int& operator[](const string&& __k);
       ^

The "string" in the test is a reduction of libstdc++'s std::string.

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