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 // UNSUPPORTED: c++98, c++03 11 12 // <random> 13 14 // template<class RealType = double> 15 // class piecewise_constant_distribution 16 17 // piecewise_constant_distribution(initializer_list<result_type> bl, 18 // UnaryOperation fw); 19 20 #include <iostream> 21 22 #include <random> 23 #include <cassert> 24 25 double f(double x) 26 { 27 return x*2; 28 } 29 30 int main() 31 { 32 { 33 typedef std::piecewise_constant_distribution<> D; 34 D d({}, f); 35 std::vector<double> iv = d.intervals(); 36 assert(iv.size() == 2); 37 assert(iv[0] == 0); 38 assert(iv[1] == 1); 39 std::vector<double> dn = d.densities(); 40 assert(dn.size() == 1); 41 assert(dn[0] == 1); 42 } 43 { 44 typedef std::piecewise_constant_distribution<> D; 45 D d({12}, f); 46 std::vector<double> iv = d.intervals(); 47 assert(iv.size() == 2); 48 assert(iv[0] == 0); 49 assert(iv[1] == 1); 50 std::vector<double> dn = d.densities(); 51 assert(dn.size() == 1); 52 assert(dn[0] == 1); 53 } 54 { 55 typedef std::piecewise_constant_distribution<> D; 56 D d({12, 14}, f); 57 std::vector<double> iv = d.intervals(); 58 assert(iv.size() == 2); 59 assert(iv[0] == 12); 60 assert(iv[1] == 14); 61 std::vector<double> dn = d.densities(); 62 assert(dn.size() == 1); 63 assert(dn[0] == 0.5); 64 } 65 { 66 typedef std::piecewise_constant_distribution<> D; 67 D d({5.5, 7.5, 11.5}, f); 68 std::vector<double> iv = d.intervals(); 69 assert(iv.size() == 3); 70 assert(iv[0] == 5.5); 71 assert(iv[1] == 7.5); 72 assert(iv[2] == 11.5); 73 std::vector<double> dn = d.densities(); 74 assert(dn.size() == 2); 75 assert(dn[0] == 0.203125); 76 assert(dn[1] == 0.1484375); 77 } 78 } 79
