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c++templatesc++14template-templates

Catch classes with specific template argument

Is it possible to catch only classes that have a specific template argument, i.e., something like this:

template< typename T >
void foo( T<int> )
{
  // do something
}
Solution

  • Yes, but you have to use a template template argument

    template <template <typename> class T>
void foo( T<int> )
{
  // do something
}

    You can also write 

    template <typename...> class T

    to intercept a type T that receive zero or more type parameters (example: to intercept std::vector that receive two type where the second is with a default value).