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 // template<class UnaryOperation> 16 // param_type(size_t nw, double xmin, double xmax, 17 // UnaryOperation fw); 18 19 #include <random> 20 #include <cassert> 21 22 double fw(double x) 23 { 24 return 2*x; 25 } 26 27 int main() 28 { 29 { 30 typedef std::piecewise_constant_distribution<> D; 31 typedef D::param_type P; 32 P pa(0, 0, 1, fw); 33 std::vector<double> iv = pa.intervals(); 34 assert(iv.size() == 2); 35 assert(iv[0] == 0); 36 assert(iv[1] == 1); 37 std::vector<double> dn = pa.densities(); 38 assert(dn.size() == 1); 39 assert(dn[0] == 1); 40 } 41 { 42 typedef std::piecewise_constant_distribution<> D; 43 typedef D::param_type P; 44 P pa(1, 10, 12, fw); 45 std::vector<double> iv = pa.intervals(); 46 assert(iv.size() == 2); 47 assert(iv[0] == 10); 48 assert(iv[1] == 12); 49 std::vector<double> dn = pa.densities(); 50 assert(dn.size() == 1); 51 assert(dn[0] == 0.5); 52 } 53 { 54 typedef std::piecewise_constant_distribution<> D; 55 typedef D::param_type P; 56 P pa(2, 6, 14, fw); 57 std::vector<double> iv = pa.intervals(); 58 assert(iv.size() == 3); 59 assert(iv[0] == 6); 60 assert(iv[1] == 10); 61 assert(iv[2] == 14); 62 std::vector<double> dn = pa.densities(); 63 assert(dn.size() == 2); 64 assert(dn[0] == 0.1); 65 assert(dn[1] == 0.15); 66 } 67 } 68
