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add ValueBuilder

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This commit is contained in:
Michael Davidsaver
2017-07-03 17:34:38 +02:00
parent 1d2e5d182e
commit bef616632c
6 changed files with 537 additions and 0 deletions
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25
src/misc/pv/templateMeta.h
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@@ -116,6 +116,31 @@ struct _and {};
template<typename A, typename B, class R>
struct _and<A,B, typename A::type, typename B::type, R> { typedef R type; };
/** Mangle type to best pass as an argument.
*
* POD types passed by value.
* All others by const reference.
*/
template<typename T>
struct arg_type {typedef const T& type;};
#define SIMPLE_ARG_TYPE(TYPE) template<> struct arg_type<TYPE> { typedef TYPE type; };
SIMPLE_ARG_TYPE(bool)
SIMPLE_ARG_TYPE(char)
SIMPLE_ARG_TYPE(signed char)
SIMPLE_ARG_TYPE(unsigned char)
SIMPLE_ARG_TYPE(short)
SIMPLE_ARG_TYPE(unsigned short)
SIMPLE_ARG_TYPE(int)
SIMPLE_ARG_TYPE(unsigned int)
SIMPLE_ARG_TYPE(long)
SIMPLE_ARG_TYPE(unsigned long)
SIMPLE_ARG_TYPE(long long)
SIMPLE_ARG_TYPE(unsigned long long)
SIMPLE_ARG_TYPE(float)
SIMPLE_ARG_TYPE(double)
SIMPLE_ARG_TYPE(long double)
#undef SIMPLE_ARG_TYPE
}}}
#endif // TEMPLATEMETA_H