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 // <random> 11 12 // template<class RealType = double> 13 // class piecewise_constant_distribution 14 15 // param_type(initializer_list<result_type> bl, UnaryOperation fw); 16 17 #include <random> 18 #include <cassert> 19 20 double f(double x) 21 { 22 return x*2; 23 } 24 25 int main() 26 { 27 #ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 28 { 29 typedef std::piecewise_constant_distribution<> D; 30 typedef D::param_type P; 31 P pa({}, f); 32 std::vector<double> iv = pa.intervals(); 33 assert(iv.size() == 2); 34 assert(iv[0] == 0); 35 assert(iv[1] == 1); 36 std::vector<double> dn = pa.densities(); 37 assert(dn.size() == 1); 38 assert(dn[0] == 1); 39 } 40 { 41 typedef std::piecewise_constant_distribution<> D; 42 typedef D::param_type P; 43 P pa({12}, f); 44 std::vector<double> iv = pa.intervals(); 45 assert(iv.size() == 2); 46 assert(iv[0] == 0); 47 assert(iv[1] == 1); 48 std::vector<double> dn = pa.densities(); 49 assert(dn.size() == 1); 50 assert(dn[0] == 1); 51 } 52 { 53 typedef std::piecewise_constant_distribution<> D; 54 typedef D::param_type P; 55 P pa({12, 14}, f); 56 std::vector<double> iv = pa.intervals(); 57 assert(iv.size() == 2); 58 assert(iv[0] == 12); 59 assert(iv[1] == 14); 60 std::vector<double> dn = pa.densities(); 61 assert(dn.size() == 1); 62 assert(dn[0] == 0.5); 63 } 64 { 65 typedef std::piecewise_constant_distribution<> D; 66 typedef D::param_type P; 67 P pa({5.5, 7.5, 11.5}, f); 68 std::vector<double> iv = pa.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 = pa.densities(); 74 assert(dn.size() == 2); 75 assert(dn[0] == 0.203125); 76 assert(dn[1] == 0.1484375); 77 } 78 #endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 79 } 80
