mirror of
https://github.com/bulletphysics/bullet3
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86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
/*
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Bullet Continuous Collision Detection and Physics Library Maya Plugin
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Copyright (c) 2008 Walt Disney Studios
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising
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from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must
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not claim that you wrote the original software. If you use this
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software in a product, an acknowledgment in the product documentation
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would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must
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not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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Written by: Nicola Candussi <nicola@fluidinteractive.com>
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*/
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//traits.h
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#ifndef MVL_TRAITS_H
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#define MVL_TRAITS_H
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namespace mvl {
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//simple promotion for now
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//check if a type is a POD
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template<typename T>
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struct isPOD { enum { value = false }; };
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template<> struct isPOD<char> { enum { value = true }; };
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template<> struct isPOD<short> { enum { value = true }; };
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template<> struct isPOD<int> { enum { value = true }; };
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template<> struct isPOD<float> { enum { value = true }; };
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template<> struct isPOD<double> { enum { value = true }; };
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template<> struct isPOD<long double> { enum { value = true }; };
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//
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template<bool Condition, typename T1, typename T2> struct ifThenElse { typedef T2 value_type; };
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template<typename T1, typename T2> struct ifThenElse<true, T1, T2> { typedef T1 value_type; };
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template<typename T1, typename T2>
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struct promote_traits
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{
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typedef typename ifThenElse<isPOD<T1>::value, T2, T1>::value_type value_type;
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};
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template<typename T>
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struct promote_traits<T, T>
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{
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typedef T value_type;
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};
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#define TRAITS_DEFINE_MACRO(T1, T2, TP) \
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template<> \
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struct promote_traits<T1, T2> \
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{ \
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typedef TP value_type; \
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}; \
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template<> \
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struct promote_traits<T2, T1> \
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{ \
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typedef TP value_type; \
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};
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TRAITS_DEFINE_MACRO(int, float, float)
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TRAITS_DEFINE_MACRO(int, double, double)
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TRAITS_DEFINE_MACRO(int, long double, long double)
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TRAITS_DEFINE_MACRO(float, double, double)
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TRAITS_DEFINE_MACRO(float, long double, long double)
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TRAITS_DEFINE_MACRO(double, long double, long double)
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#undef TRAITS_DEFINE_MACRO
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} // namespace mvl
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#endif
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