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_linear_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_linear_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() == 2); 38 assert(dn[0] == 1); 39 assert(dn[1] == 1); 40 } 41 { 42 typedef std::piecewise_linear_distribution<> D; 43 typedef D::param_type P; 44 P pa({12}, f); 45 std::vector<double> iv = pa.intervals(); 46 assert(iv.size() == 2); 47 assert(iv[0] == 0); 48 assert(iv[1] == 1); 49 std::vector<double> dn = pa.densities(); 50 assert(dn.size() == 2); 51 assert(dn[0] == 1); 52 assert(dn[1] == 1); 53 } 54 { 55 typedef std::piecewise_linear_distribution<> D; 56 typedef D::param_type P; 57 P pa({10, 12}, f); 58 std::vector<double> iv = pa.intervals(); 59 assert(iv.size() == 2); 60 assert(iv[0] == 10); 61 assert(iv[1] == 12); 62 std::vector<double> dn = pa.densities(); 63 assert(dn.size() == 2); 64 assert(dn[0] == 20./44); 65 assert(dn[1] == 24./44); 66 } 67 { 68 typedef std::piecewise_linear_distribution<> D; 69 typedef D::param_type P; 70 P pa({6, 10, 14}, f); 71 std::vector<double> iv = pa.intervals(); 72 assert(iv.size() == 3); 73 assert(iv[0] == 6); 74 assert(iv[1] == 10); 75 assert(iv[2] == 14); 76 std::vector<double> dn = pa.densities(); 77 assert(dn.size() == 3); 78 assert(dn[0] == 0.075); 79 assert(dn[1] == 0.125); 80 assert(dn[2] == 0.175); 81 } 82 #endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 83 } 84
