bucket_size.pass.cpp (2382B)
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 // size_type bucket_size(size_type n) const 17 18 #ifdef _LIBCPP_DEBUG 19 #define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0)) 20 #endif 21 22 #include <unordered_map> 23 #include <string> 24 #include <cassert> 25 26 #include "test_macros.h" 27 #include "min_allocator.h" 28 29 int main() 30 { 31 { 32 typedef std::unordered_map<int, std::string> C; 33 typedef std::pair<int, std::string> P; 34 P a[] = 35 { 36 P(1, "one"), 37 P(2, "two"), 38 P(3, "three"), 39 P(4, "four"), 40 P(1, "four"), 41 P(2, "four"), 42 }; 43 const C c(std::begin(a), std::end(a)); 44 assert(c.bucket_count() >= 5); 45 LIBCPP_ASSERT(c.bucket_size(0) == 0); 46 LIBCPP_ASSERT(c.bucket_size(1) == 1); 47 LIBCPP_ASSERT(c.bucket_size(2) == 1); 48 LIBCPP_ASSERT(c.bucket_size(3) == 1); 49 LIBCPP_ASSERT(c.bucket_size(4) == 1); 50 } 51 #if TEST_STD_VER >= 11 52 { 53 typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>, 54 min_allocator<std::pair<const int, std::string>>> C; 55 typedef std::pair<int, std::string> P; 56 P a[] = 57 { 58 P(1, "one"), 59 P(2, "two"), 60 P(3, "three"), 61 P(4, "four"), 62 P(1, "four"), 63 P(2, "four"), 64 }; 65 const C c(std::begin(a), std::end(a)); 66 assert(c.bucket_count() >= 5); 67 LIBCPP_ASSERT(c.bucket_size(0) == 0); 68 LIBCPP_ASSERT(c.bucket_size(1) == 1); 69 LIBCPP_ASSERT(c.bucket_size(2) == 1); 70 LIBCPP_ASSERT(c.bucket_size(3) == 1); 71 LIBCPP_ASSERT(c.bucket_size(4) == 1); 72 } 73 #endif 74 #if _LIBCPP_DEBUG_LEVEL >= 1 75 { 76 typedef std::unordered_map<int, std::string> C; 77 C c; 78 C::size_type i = c.bucket_size(3); 79 assert(false); 80 } 81 #endif 82 }