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View Compilation Error

GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/ext/hashtable.h: In member function `size_t __gnu_cxx::hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>::_M_bkt_num_key(const _Key&, size_t) const [with _Val = std::pair<const std::string, std::string>, _Key = std::string, _HashFcn = __gnu_cxx::hash<std::string>, _ExtractKey = std::_Select1st<std::pair<const std::string, std::string> >, _EqualKey = std::equal_to<std::string>, _Alloc = std::allocator<std::string>]':
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/ext/hashtable.h:523:   instantiated from `size_t __gnu_cxx::hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>::_M_bkt_num(const _Val&, size_t) const [with _Val = std::pair<const std::string, std::string>, _Key = std::string, _HashFcn = __gnu_cxx::hash<std::string>, _ExtractKey = std::_Select1st<std::pair<const std::string, std::string> >, _EqualKey = std::equal_to<std::string>, _Alloc = std::allocator<std::string>]'
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/ext/hashtable.h:887:   instantiated from `void __gnu_cxx::hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>::resize(size_t) [with _Val = std::pair<const std::string, std::string>, _Key = std::string, _HashFcn = __gnu_cxx::hash<std::string>, _ExtractKey = std::_Select1st<std::pair<const std::string, std::string> >, _EqualKey = std::equal_to<std::string>, _Alloc = std::allocator<std::string>]'
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/ext/hashtable.h:701:   instantiated from `typename __gnu_cxx::hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>::reference __gnu_cxx::hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>::find_or_insert(const _Val&) [with _Val = std::pair<const std::string, std::string>, _Key = std::string, _HashFcn = __gnu_cxx::hash<std::string>, _ExtractKey = std::_Select1st<std::pair<const std::string, std::string> >, _EqualKey = std::equal_to<std::string>, _Alloc = std::allocator<std::string>]'
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/ext/hash_map:181:   instantiated from `_Tp& __gnu_cxx::hash_map<_Key, _Tp, _HashFcn, _EqualKey, _Alloc>::operator[](const typename __gnu_cxx::hashtable<std::pair<const _Key, _Tp>, _Key, _HashFcn, std::_Select1st<std::pair<const _Key, _Tp> >, _EqualKey, _Alloc>::key_type&) [with _Key = std::string, _Tp = std::string, _HashFcn = __gnu_cxx::hash<std::string>, _EqualKey = std::equal_to<std::string>, _Alloc = std::allocator<std::string>]'
1082021_0_0_4112.cpp:19:   instantiated from here
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/ext/hashtable.h:518: error: no match for call to `(const __gnu_cxx::hash<std::string>) (const std::basic_string<char, std::char_traits<char>, std::allocator<char> >&)'


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