load_factor.pass.cpp revision f836d531b4146465342939fe32ae47d157ee07b2
1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// The LLVM Compiler Infrastructure 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <unordered_set> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>, 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// class Alloc = allocator<Value>> 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// class unordered_set 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// float load_factor() const 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <unordered_set> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 20f836d531b4146465342939fe32ae47d157ee07b2Howard Hinnant#include <cfloat> 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::unordered_set<int> C; 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef int P; 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant P a[] = 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant P(10), 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant P(20), 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant P(30), 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant P(40), 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant P(50), 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant P(60), 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant P(70), 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant P(80) 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant }; 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const C c(std::begin(a), std::end(a)); 39f836d531b4146465342939fe32ae47d157ee07b2Howard Hinnant assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON); 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::unordered_set<int> C; 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef int P; 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const C c; 45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(c.load_factor() == 0); 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 48