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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <random>
// template<class IntType = int>
// class discrete_distribution
// template<class UnaryOperation>
// discrete_distribution(size_t nw, double xmin, double xmax,
// UnaryOperation fw);
#include <random>
#include <cassert>
#include <vector>
#include "test_macros.h"
double fw(double x)
{
return x+1;
}
int main(int, char**)
{
{
typedef std::discrete_distribution<> D;
D d(0, 0, 1, fw);
std::vector<double> p = d.probabilities();
assert(p.size() == 1);
assert(p[0] == 1);
}
{
typedef std::discrete_distribution<> D;
D d(1, 0, 1, fw);
std::vector<double> p = d.probabilities();
assert(p.size() == 1);
assert(p[0] == 1);
}
{
typedef std::discrete_distribution<> D;
D d(2, 0.5, 1.5, fw);
std::vector<double> p = d.probabilities();
assert(p.size() == 2);
assert(p[0] == .4375);
assert(p[1] == .5625);
}
{
typedef std::discrete_distribution<> D;
D d(4, 0, 2, fw);
std::vector<double> p = d.probabilities();
assert(p.size() == 4);
assert(p[0] == .15625);
assert(p[1] == .21875);
assert(p[2] == .28125);
}
return 0;
}
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