functional.h

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.



#pragma once

namespacejitstd
{

template <typename T>
voidswap(T& a, T& b)
{
 T t(a);
 a = b;
 b = t;
}

template <typename Arg, typename Result>
structunary_function
{
typedef Arg argument_type;
typedef Result result_type;
};

template <typename Arg1, typename Arg2, typename Result>
structbinary_function
{
typedef Arg1 first_argument_type;
typedef Arg2 second_argument_type;
typedef Result result_type;
};

template <typename T>
structgreater : binary_function<T, T, bool>
{
booloperator()(const T& lhs, const T& rhs) const
 {
return lhs > rhs;
 }
};

template <typename T>
structequal_to : binary_function<T, T, bool>
{
booloperator()(const T& lhs, const T& rhs) const
 {
return lhs == rhs;
 }
};

template <typename T>
structidentity : unary_function<T, T>
{
const T& operator()(const T& op) const
 {
return op;
 }
};

} // end of namespace jitstd.