Why the default value of T of enable_if is void?
template<bool B, class T = void> struct enable_if {}; #1 template<class T> struct enable_if<true, T> { typedef T type; }; #2 It only declares the default value of T is void in the #1. For #2, there is not default value of T. However, why T will be void if the bool B is true? […]
Why the default value of T of enable_if is void?
template<bool B, class T = void> struct enable_if {}; #1 template<class T> struct enable_if<true, T> { typedef T type; }; #2 It only declares the default value of T is void in the #1. For #2, there is not default value of T. However, why T will be void if the bool B is true? […]
Why the default value of T of enable_if is void?
template<bool B, class T = void> struct enable_if {}; #1 template<class T> struct enable_if<true, T> { typedef T type; }; #2 It only declares the default value of T is void in the #1. For #2, there is not default value of T. However, why T will be void if the bool B is true? […]
How to write C++ template SFINAE in my case [duplicate]
This question already has answers here: check if member exists using enable_if (8 answers) How to detect whether there is a specific member variable in class? (10 answers) Closed 1 hour ago. template<typename VertexType> class CQuad { public: VertexType tl, bl, tr, br; void SetColor(const CColor& color) { //if VertexType has a member “color”, then […]
How does SFINAE affects symbol?
Given helpers as follow :