1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <random>
10
11 // template<class RealType = double>
12 // class piecewise_constant_distribution
13
14 // template<class UnaryOperation>
15 // piecewise_constant_distribution(size_t nw, result_type xmin,
16 // result_type xmax, UnaryOperation fw);
17
18 #include <random>
19
20 #include <cassert>
21 #include <vector>
22
23 #include "test_macros.h"
24
fw(double x)25 double fw(double x)
26 {
27 return 2*x;
28 }
29
main(int,char **)30 int main(int, char**)
31 {
32 {
33 typedef std::piecewise_constant_distribution<> D;
34 D d(0, 0, 1, fw);
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(1, 10, 12, fw);
46 std::vector<double> iv = d.intervals();
47 assert(iv.size() == 2);
48 assert(iv[0] == 10);
49 assert(iv[1] == 12);
50 std::vector<double> dn = d.densities();
51 assert(dn.size() == 1);
52 assert(dn[0] == 0.5);
53 }
54 {
55 typedef std::piecewise_constant_distribution<> D;
56 D d(2, 6, 14, fw);
57 std::vector<double> iv = d.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 = d.densities();
63 assert(dn.size() == 2);
64 assert(dn[0] == 0.1);
65 assert(dn[1] == 0.15);
66 }
67
68 return 0;
69 }
70