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49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef BEAST_UTILITY_ENABLEIF_H_INCLUDED
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#define BEAST_UTILITY_ENABLEIF_H_INCLUDED
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#include "../type_traits/IntegralConstant.h"
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namespace beast
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{
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template <bool Enable, class T = void>
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struct EnableIfBool : TrueType { typedef T type; };
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template <class T>
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struct EnableIfBool <false, T> : FalseType { };
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template <class Cond, class T = void>
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struct EnableIf : public EnableIfBool <Cond::value, T> { };
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template <bool Enable, class T = void>
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struct DisableIfBool : FalseType { typedef T type; };
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template <class T>
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struct DisableIfBool <true, T> { };
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template <class Cond, class T = void>
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struct DisableIf : public DisableIfBool <Cond::value, T> { };
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}
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#endif
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