1 // -*- C++ -*- 2 //===------------------------- hash_set ------------------------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is dual licensed under the MIT and the University of Illinois Open 7 // Source Licenses. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 #ifndef _LIBCPP_EXT_HASH 12 #define _LIBCPP_EXT_HASH 13 14 #pragma GCC system_header 15 16 #include <string> 17 #include <cstring> 18 19 namespace __gnu_cxx { 20 using namespace std; 21 22 template <typename T> struct _LIBCPP_TYPE_VIS hash : public std::hash<T> 23 { }; 24 25 template <> struct _LIBCPP_TYPE_VIS hash<const char*> 26 : public unary_function<const char*, size_t> 27 { 28 _LIBCPP_INLINE_VISIBILITY 29 size_t operator()(const char *__c) const _NOEXCEPT 30 { 31 return __do_string_hash(__c, __c + strlen(__c)); 32 } 33 }; 34 35 template <> struct _LIBCPP_TYPE_VIS hash<char *> 36 : public unary_function<char*, size_t> 37 { 38 _LIBCPP_INLINE_VISIBILITY 39 size_t operator()(char *__c) const _NOEXCEPT 40 { 41 return __do_string_hash<const char *>(__c, __c + strlen(__c)); 42 } 43 }; 44 } 45 46 #endif // _LIBCPP_EXT_HASH 47
