std::experimental::ranges::DerivedFrom

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< cpp‎ | experimental‎ | ranges
 
 
Technical specifications
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals TS v2)
Library fundamentals 3 (library fundamentals TS v3)
Extensions for parallelism (parallelism TS)
Extensions for parallelism 2 (parallelism TS v2)
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Extensions for concurrency 2 (concurrency TS v2)
Concepts (concepts TS)
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Concepts library
Core language concepts
DerivedFrom
                              
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Comparison concepts
Callable concepts
                                        
                              
URNG concept
 
template < class T, class U >

concept bool DerivedFrom =
  std::is_base_of<U, T>::value &&

  std::is_convertible<std::remove_cv_t<T>*, std::remove_cv_t<U>*>::value;
(ranges TS)

The concept DerivedFrom<T, U> is satisfied if and only if U is a class type that is either T or a public and unambiguous base of T.

Despite the use of std::is_base_of and std::is_convertible in its description above, DerivedFrom is not required to use it in its implementation. Thus, there need not be any subsumption relationship between DerivedFrom<T, U> and std::is_base_of<U,T>::value or std::is_convertible<std::remove_cv_t<T>*, std::remove_cv_t<U>*>::value.

See also

checks if a type is derived from the other type
(class template)
checks if a type can be converted to the other type
(class template)