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// IBM_PROLOG_BEGIN_TAG
// This is an automatically generated prolog.
//
// $Source: src/include/functional $
//
// IBM CONFIDENTIAL
//
// COPYRIGHT International Business Machines Corp. 2011
//
// p1
//
// Object Code Only (OCO) source materials
// Licensed Internal Code Source Materials
// IBM HostBoot Licensed Internal Code
//
// The source code for this program is not published or other-
// wise divested of its trade secrets, irrespective of what has
// been deposited with the U.S. Copyright Office.
//
// Origin: 30
//
// IBM_PROLOG_END
#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; }
};
// --------------- 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)(); }
private:
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)(); }
private:
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); }
private:
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); }
private:
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)(); }
private:
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)(); }
private:
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); }
private:
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); }
private:
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);
}
private:
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);
}
private:
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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