C++
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Date and time using
header - decltype
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C++ Metaprogramming Generic Min/Max with variable argument count
Example
C++11
It's possible to write a generic function (for example min) which accepts various numerical types and arbitrary argument count by template meta-programming. This function declares a min for two arguments and recursively for more.
template <typename T1, typename T2>
auto min(const T1 &a, const T2 &b)
-> typename std::common_type<const T1&, const T2&>::type
{
return a < b ? a : b;
}
template <typename T1, typename T2, typename ... Args>
auto min(const T1 &a, const T2 &b, const Args& ... args)
-> typename std::common_type<const T1&, const T2&, const Args& ...>::type
{
return min(min(a, b), args...);
}
auto minimum = min(4, 5.8f, 3, 1.8, 3, 1.1, 9);
