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 // UNSUPPORTED: c++03
10
11 // <random>
12
13 // template<class RealType = double>
14 // class piecewise_linear_distribution
15
16 // piecewise_linear_distribution(initializer_list<result_type> bl,
17 // UnaryOperation fw);
18
19 #include <random>
20
21 #include <cassert>
22 #include <vector>
23
24 #include "test_macros.h"
25
f(double x)26 double f(double x)
27 {
28 return x*2;
29 }
30
main(int,char **)31 int main(int, char**)
32 {
33 {
34 typedef std::piecewise_linear_distribution<> D;
35 D d({}, f);
36 std::vector<double> iv = d.intervals();
37 assert(iv.size() == 2);
38 assert(iv[0] == 0);
39 assert(iv[1] == 1);
40 std::vector<double> dn = d.densities();
41 assert(dn.size() == 2);
42 assert(dn[0] == 1);
43 assert(dn[1] == 1);
44 }
45 {
46 typedef std::piecewise_linear_distribution<> D;
47 D d({12}, f);
48 std::vector<double> iv = d.intervals();
49 assert(iv.size() == 2);
50 assert(iv[0] == 0);
51 assert(iv[1] == 1);
52 std::vector<double> dn = d.densities();
53 assert(dn.size() == 2);
54 assert(dn[0] == 1);
55 assert(dn[1] == 1);
56 }
57 {
58 typedef std::piecewise_linear_distribution<> D;
59 D d({10, 12}, f);
60 std::vector<double> iv = d.intervals();
61 assert(iv.size() == 2);
62 assert(iv[0] == 10);
63 assert(iv[1] == 12);
64 std::vector<double> dn = d.densities();
65 assert(dn.size() == 2);
66 assert(dn[0] == 20./44);
67 assert(dn[1] == 24./44);
68 }
69 {
70 typedef std::piecewise_linear_distribution<> D;
71 D d({6, 10, 14}, f);
72 std::vector<double> iv = d.intervals();
73 assert(iv.size() == 3);
74 assert(iv[0] == 6);
75 assert(iv[1] == 10);
76 assert(iv[2] == 14);
77 std::vector<double> dn = d.densities();
78 assert(dn.size() == 3);
79 assert(dn[0] == 0.075);
80 assert(dn[1] == 0.125);
81 assert(dn[2] == 0.175);
82 }
83
84 return 0;
85 }
86