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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/functional.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2011,2014 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#ifndef _FUNCTIONAL_H
#define _FUNCTIONAL_H
// See C++ spec
namespace std
{
template<typename A1, typename A2, typename R>
struct binary_function
{
typedef A1 first_argument_type; ///< type of the first argument
typedef A2 second_argument_type; ///< type of the second argument
typedef R result_type; ///< type of the return type
};
template<typename A, typename R>
struct unary_function
{
typedef A argument_type;
typedef R result_type;
};
/**
* less template
*/
template<typename T>
struct less : public binary_function<T, T, bool>
{
/**
* operator()
* @param[in] x first object
* @param[in] y second object
* @return true if x < y otherwise false
*/
bool operator()(const T& x, const T& y) const
{
return x < y;
}
};
template<typename T>
struct greater : public binary_function<T, T, bool>
{
/**
* operator()
* @param[in] x first object
* @param[in] y second object
* @return true if x > y otherwise false
*/
bool operator()(const T& x, const T& y) const
{ return x > y; }
};
// --------------- ptr_fun templates --------------- //
template<typename A1, typename Result>
struct pointer_to_unary_function : public unary_function<A1, Result>
{
explicit pointer_to_unary_function(Result (*f)(A1)) : func(f) {}
Result operator()(A1 a1) const { return (*func)(a1); }
protected:
Result (*func)(A1);
};
template <typename A1, typename Result>
pointer_to_unary_function<A1, Result> ptr_fun(Result (*f)(A1))
{
return pointer_to_unary_function<A1, Result>(f);
}
template<typename A1, typename A2, typename Result>
struct pointer_to_binary_function :
public binary_function<A1, A2, Result>
{
explicit pointer_to_binary_function(Result (*f)(A1, A2)) : func(f) {}
Result operator()(A1 a1, A2 a2) const { return (*func)(a1,a2); }
protected:
Result (*func)(A1,A2);
};
template <typename A1, typename A2, typename Result>
pointer_to_binary_function<A1, A2, Result> ptr_fun(Result (*f)(A1,A2))
{
return pointer_to_binary_function<A1, A2, Result>(f);
}
// --------------- mem_fun templates --------------- //
template<typename Result, typename X>
struct mem_fun_t : public unary_function<X*, Result>
{
explicit mem_fun_t(Result (X::*f)()) : func(f) {}
Result operator()(X* x) const { return (x->*func)(); }
protected:
Result (X::*func)();
};
template<typename Result, typename X>
struct const_mem_fun_t : public unary_function<X*, Result>
{
explicit const_mem_fun_t(Result (X::*f)() const) : func(f) {}
Result operator()(const X* x) const { return (x->*func)(); }
protected:
Result (X::*func)() const;
};
template<typename Result, typename X>
mem_fun_t<Result, X> mem_fun(Result (X::*f)())
{
return mem_fun_t<Result, X>(f);
}
template<typename Result, typename X>
const_mem_fun_t<Result, X> mem_fun(Result (X::*f)() const)
{
return const_mem_fun_t<Result, X>(f);
}
// --------------- mem_fun1 templates --------------- //
template<typename Result, typename X, typename Arg>
struct mem_fun1_t : public binary_function<X*, Arg, Result>
{
explicit mem_fun1_t(Result (X::*f)(Arg)) : func(f) {}
Result operator()(X* x, Arg a) const { return (x->*func)(a); }
protected:
Result (X::*func)(Arg);
};
template<typename Result, typename X, typename Arg>
struct const_mem_fun1_t : public binary_function<X*, Arg, Result>
{
explicit const_mem_fun1_t(Result (X::*f)(Arg) const) : func(f) {}
Result operator()(const X* x, Arg a) const { return (x->*func)(a); }
protected:
Result (X::*func)(Arg) const;
};
template<typename Result, typename X, typename Arg>
mem_fun1_t<Result, X, Arg> mem_fun(Result (X::*f)(Arg))
{
return mem_fun1_t<Result, X, Arg>(f);
}
template<typename Result, typename X, typename Arg>
const_mem_fun1_t<Result, X, Arg> mem_fun(Result (X::*f)(Arg) const)
{
return const_mem_fun1_t<Result, X, Arg>(f);
}
// --------------- mem_fun_ref templates --------------- //
template<typename Result, typename X>
struct mem_fun_ref_t : public unary_function<X, Result>
{
explicit mem_fun_ref_t(Result (X::*f)()) : func(f) {}
Result operator()(X& x) const { return (x.*func)(); }
protected:
Result (X::*func)();
};
template<typename Result, typename X>
struct const_mem_fun_ref_t : public unary_function<X, Result>
{
explicit const_mem_fun_ref_t(Result (X::*f)() const) : func(f) {}
Result operator()(const X& x) const { return (x.*func)(); }
protected:
Result (X::*func)() const;
};
template<typename Result, typename X>
mem_fun_ref_t<Result, X> mem_fun_ref(Result (X::*f)())
{
return mem_fun_ref_t<Result, X>(f);
}
template<typename Result, typename X>
const_mem_fun_ref_t<Result, X> mem_fun_ref(Result (X::*f)() const)
{
return const_mem_fun_ref_t<Result, X>(f);
}
// --------------- mem_fun1_ref templates --------------- //
template<typename Result, typename X, typename Arg>
struct mem_fun1_ref_t : public binary_function<X, Arg, Result>
{
explicit mem_fun1_ref_t(Result (X::*f)(Arg)) : func(f) {}
Result operator()(X& x, Arg a) const { return (x.*func)(a); }
protected:
Result (X::*func)(Arg);
};
template<typename Result, typename X, typename Arg>
struct const_mem_fun1_ref_t : public binary_function<X, Arg, Result>
{
explicit const_mem_fun1_ref_t(Result (X::*f)(Arg) const) : func(f) {}
Result operator()(const X& x, Arg a) const { return (x.*func)(a); }
protected:
Result (X::*func)(Arg) const;
};
template<typename Result, typename X, typename Arg>
mem_fun1_ref_t<Result, X, Arg> mem_fun_ref(Result (X::*f)(Arg))
{
return mem_fun1_ref_t<Result, X, Arg>(f);
}
template<typename Result, typename X, typename Arg>
const_mem_fun1_ref_t<Result, X, Arg> mem_fun_ref(Result (X::*f)(Arg) const)
{
return const_mem_fun1_ref_t<Result, X, Arg>(f);
}
// --------------- bind1st templates --------------- //
template<typename AdaptableBinaryFunction>
struct binder1st :
public unary_function<
typename AdaptableBinaryFunction::second_argument_type,
typename AdaptableBinaryFunction::result_type
>
{
binder1st(const AdaptableBinaryFunction& F,
typename AdaptableBinaryFunction::first_argument_type c) :
func(F), arg(c) {}
typename AdaptableBinaryFunction::result_type
operator()(const typename
AdaptableBinaryFunction::second_argument_type& x) const
{
return func(arg, x);
}
protected:
AdaptableBinaryFunction func;
typename AdaptableBinaryFunction::first_argument_type arg;
};
template<typename AdaptableBinaryFunction, typename T>
binder1st<AdaptableBinaryFunction>
bind1st(const AdaptableBinaryFunction& F,
const T& c)
{
return binder1st<AdaptableBinaryFunction>(F,
typename AdaptableBinaryFunction::first_argument_type(c));
};
// --------------- bind2nd templates --------------- //
template<typename AdaptableBinaryFunction>
struct binder2nd :
public unary_function<
typename AdaptableBinaryFunction::first_argument_type,
typename AdaptableBinaryFunction::result_type
>
{
binder2nd(const AdaptableBinaryFunction& F,
typename AdaptableBinaryFunction::second_argument_type c) :
func(F), arg(c) {}
typename AdaptableBinaryFunction::result_type
operator()(const typename
AdaptableBinaryFunction::first_argument_type& x) const
{
return func(x, arg);
}
protected:
AdaptableBinaryFunction func;
typename AdaptableBinaryFunction::second_argument_type arg;
};
template<typename AdaptableBinaryFunction, typename T>
binder2nd<AdaptableBinaryFunction>
bind2nd(const AdaptableBinaryFunction& F,
const T& c)
{
return binder2nd<AdaptableBinaryFunction>(F,
typename AdaptableBinaryFunction::second_argument_type(c));
};
};
#endif
/* vim: set filetype=cpp : */
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