1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <unordered_map> 11 12 // template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>, 13 // class Alloc = allocator<pair<const Key, T>>> 14 // class unordered_map 15 16 // float load_factor() const 17 18 #include <unordered_map> 19 #include <string> 20 #include <cassert> 21 #include <cfloat> 22 23 #include "min_allocator.h" 24 25 int main() 26 { 27 { 28 typedef std::unordered_map<int, std::string> C; 29 typedef std::pair<int, std::string> P; 30 P a[] = 31 { 32 P(10, "ten"), 33 P(20, "twenty"), 34 P(30, "thirty"), 35 P(40, "fourty"), 36 P(50, "fifty"), 37 P(60, "sixty"), 38 P(70, "seventy"), 39 P(80, "eighty"), 40 }; 41 const C c(std::begin(a), std::end(a)); 42 assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON); 43 } 44 { 45 typedef std::unordered_map<int, std::string> C; 46 typedef std::pair<int, std::string> P; 47 const C c; 48 assert(c.load_factor() == 0); 49 } 50 #if __cplusplus >= 201103L 51 { 52 typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>, 53 min_allocator<std::pair<const int, std::string>>> C; 54 typedef std::pair<int, std::string> P; 55 P a[] = 56 { 57 P(10, "ten"), 58 P(20, "twenty"), 59 P(30, "thirty"), 60 P(40, "fourty"), 61 P(50, "fifty"), 62 P(60, "sixty"), 63 P(70, "seventy"), 64 P(80, "eighty"), 65 }; 66 const C c(std::begin(a), std::end(a)); 67 assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON); 68 } 69 { 70 typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>, 71 min_allocator<std::pair<const int, std::string>>> C; 72 typedef std::pair<int, std::string> P; 73 const C c; 74 assert(c.load_factor() == 0); 75 } 76 #endif 77 } 78
