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std::experimental::ranges::DerivedFrom

From cppreference.com
< cpp‎ | experimental‎ | ranges
 
 
Technical specifications
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals 2 TS)
Extensions for parallelism (parallelism TS)
Extensions for concurrency (concurrency TS)
Concepts (concepts TS)
Ranges (ranges TS)
Special mathematical functions (special math TR)
 
 
Concepts library
Core language concepts
DerivedFrom
                              
Object concepts
                              
                              
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.

[edit] See also

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