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