rcpputils::is_pointer< T > Struct Template Reference

Type traits for validating if T is of type pointer or smart pointer. More...

#include <pointer_traits.hpp>

Static Public Attributes
static constexpr bool	value
	Indicates whether this object is a pointer or smart pointer. More...

Detailed Description

template<class T>
struct rcpputils::is_pointer< T >

Type traits for validating if T is of type pointer or smart pointer.

In comparison to the existing type trait for pointer in the stdlib std::is_pointer<T> https://en.cppreference.com/w/cpp/types/is_pointer this trait is enhancing it for checking of smart pointer types as well. The valid pointer types are T*, std::shared_pointer<T> and std::unique_ptr<T>

Potential use cases are for static assert when passing a template parameter requiring this parameter to be of type pointer without specifying which type of pointer (raw, smart).

class MyType
{
  template<class T>
  MyType(T && arg)
  {
    static_assert(rcpputils::is_pointer<decltype(arg)>::value, "arg has to be a pointer");
 
    arg->do_stuff();  // with the assert above, this call is guaranteed to work.
  }
};

Member Data Documentation

value

template<class T >

constexpr bool rcpputils::is_pointer< T >::value

staticconstexpr

Initial value:

= std::is_pointer<typename std::remove_reference<T>::type>::value ||
    details::is_smart_pointer<typename std::remove_reference<T>::type>::value

Indicates whether this object is a pointer or smart pointer.

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The documentation for this struct was generated from the following file:

• include/rcpputils/pointer_traits.hpp