61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
#pragma once
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#ifndef TCG_FUNCTIONAL_H
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#define TCG_FUNCTIONAL_H
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#include "traits.h"
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// std includes
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#include <functional>
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//**********************************************************************************
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// Logical functor combinators
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//**********************************************************************************
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namespace tcg {
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template <typename Fn1, typename Fn2>
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class unary_and
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: public std::unary_function<typename function_traits<Fn1>::arg_type,
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bool> {
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Fn1 m_fn1;
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Fn2 m_fn2;
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public:
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unary_and(const Fn1 &fn1, const Fn2 &fn2) : m_fn1(fn1), m_fn2(fn2) {}
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bool operator()(const typename function_traits<Fn1>::arg_type &t) const {
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return m_fn1(t) && m_fn2(t);
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}
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};
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template <typename Fn1, typename Fn2>
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unary_and<Fn1, Fn2> and1(const Fn1 &fn1, const Fn2 &fn2) {
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return unary_and<Fn1, Fn2>(fn1, fn2);
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}
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//----------------------------------------------------------------------------------
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template <typename Fn1, typename Fn2>
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class unary_or
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: public std::unary_function<typename function_traits<Fn1>::arg_type,
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bool> {
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Fn1 m_fn1;
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Fn2 m_fn2;
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public:
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unary_or(const Fn1 &fn1, const Fn2 &fn2) : m_fn1(fn1), m_fn2(fn2) {}
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bool operator()(const typename function_traits<Fn1>::arg_type &t) const {
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return m_fn1(t) || m_fn2(t);
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}
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};
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template <typename Fn1, typename Fn2>
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unary_or<Fn1, Fn2> or1(const Fn1 &fn1, const Fn2 &fn2) {
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return unary_or<Fn1, Fn2>(fn1, fn2);
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}
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} // namespace tcg
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#endif // TCG_FUNCTIONAL_H
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