88 lines
2.2 KiB
C++
88 lines
2.2 KiB
C++
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/*
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* Created by Martin on 15/6/2018.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef TWOBLUECUBES_CATCH_GENERATORS_RANDOM_HPP_INCLUDED
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#define TWOBLUECUBES_CATCH_GENERATORS_RANDOM_HPP_INCLUDED
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#include <catch2/internal/catch_context.hpp>
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#include <catch2/generators/catch_generators.hpp>
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#include <catch2/internal/catch_random_number_generator.hpp>
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#include <random>
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namespace Catch {
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namespace Generators {
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template <typename Float>
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class RandomFloatingGenerator final : public IGenerator<Float> {
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Catch::SimplePcg32& m_rng;
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std::uniform_real_distribution<Float> m_dist;
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Float m_current_number;
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public:
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RandomFloatingGenerator(Float a, Float b):
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m_rng(rng()),
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m_dist(a, b) {
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static_cast<void>(next());
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}
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Float const& get() const override {
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return m_current_number;
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}
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bool next() override {
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m_current_number = m_dist(m_rng);
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return true;
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}
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};
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template <typename Integer>
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class RandomIntegerGenerator final : public IGenerator<Integer> {
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Catch::SimplePcg32& m_rng;
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std::uniform_int_distribution<Integer> m_dist;
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Integer m_current_number;
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public:
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RandomIntegerGenerator(Integer a, Integer b):
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m_rng(rng()),
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m_dist(a, b) {
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static_cast<void>(next());
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}
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Integer const& get() const override {
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return m_current_number;
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}
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bool next() override {
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m_current_number = m_dist(m_rng);
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return true;
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}
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};
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// TODO: Ideally this would be also constrained against the various char types,
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// but I don't expect users to run into that in practice.
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template <typename T>
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std::enable_if_t<std::is_integral<T>::value && !std::is_same<T, bool>::value,
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GeneratorWrapper<T>>
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random(T a, T b) {
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return GeneratorWrapper<T>(
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std::make_unique<RandomIntegerGenerator<T>>(a, b)
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);
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}
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template <typename T>
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std::enable_if_t<std::is_floating_point<T>::value,
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GeneratorWrapper<T>>
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random(T a, T b) {
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return GeneratorWrapper<T>(
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std::make_unique<RandomFloatingGenerator<T>>(a, b)
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);
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}
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} // namespace Generators
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} // namespace Catch
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#endif // TWOBLUECUBES_CATCH_GENERATORS_RANDOM_HPP_INCLUDED
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