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_constant_distribution
15
16// piecewise_constant_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
26double f(double x)
27{
28 return x*2;
29}
30
31int main(int, char**)
32{
33 {
34 typedef std::piecewise_constant_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() == 1);
42 assert(dn[0] == 1);
43 }
44 {
45 typedef std::piecewise_constant_distribution<> D;
46 D d({12}, f);
47 std::vector<double> iv = d.intervals();
48 assert(iv.size() == 2);
49 assert(iv[0] == 0);
50 assert(iv[1] == 1);
51 std::vector<double> dn = d.densities();
52 assert(dn.size() == 1);
53 assert(dn[0] == 1);
54 }
55 {
56 typedef std::piecewise_constant_distribution<> D;
57 D d({12, 14}, f);
58 std::vector<double> iv = d.intervals();
59 assert(iv.size() == 2);
60 assert(iv[0] == 12);
61 assert(iv[1] == 14);
62 std::vector<double> dn = d.densities();
63 assert(dn.size() == 1);
64 assert(dn[0] == 0.5);
65 }
66 {
67 typedef std::piecewise_constant_distribution<> D;
68 D d({5.5, 7.5, 11.5}, f);
69 std::vector<double> iv = d.intervals();
70 assert(iv.size() == 3);
71 assert(iv[0] == 5.5);
72 assert(iv[1] == 7.5);
73 assert(iv[2] == 11.5);
74 std::vector<double> dn = d.densities();
75 assert(dn.size() == 2);
76 assert(dn[0] == 0.203125);
77 assert(dn[1] == 0.1484375);
78 }
79
80 return 0;
81}
82

source code of libcxx/test/std/numerics/rand/rand.dist/rand.dist.samp/rand.dist.samp.pconst/ctor_init_func.pass.cpp