param_ctor_func.pass.cpp [plain text]
#include <random>
#include <cassert>
double fw(double x)
{
return x+1;
}
int main()
{
{
typedef std::discrete_distribution<> D;
typedef D::param_type P;
P pa(0, 0, 1, fw);
std::vector<double> p = pa.probabilities();
assert(p.size() == 1);
assert(p[0] == 1);
}
{
typedef std::discrete_distribution<> D;
typedef D::param_type P;
P pa(1, 0, 1, fw);
std::vector<double> p = pa.probabilities();
assert(p.size() == 1);
assert(p[0] == 1);
}
{
typedef std::discrete_distribution<> D;
typedef D::param_type P;
P pa(2, 0.5, 1.5, fw);
std::vector<double> p = pa.probabilities();
assert(p.size() == 2);
assert(p[0] == .4375);
assert(p[1] == .5625);
}
{
typedef std::discrete_distribution<> D;
typedef D::param_type P;
P pa(4, 0, 2, fw);
std::vector<double> p = pa.probabilities();
assert(p.size() == 4);
assert(p[0] == .15625);
assert(p[1] == .21875);
assert(p[2] == .28125);
}
}