BloombergLP::bslmf::IsAccessibleBaseOf

Synopsis

Declared in <bslmf_isaccessiblebaseof.h>

template<
    class t_BASE,
    class t_DERIVED>
class IsAccessibleBaseOf
    : public bsl::integral_constant<bool, bsl::is_class<typename bsl::remove_cv<t_BASE>::type>::value && bsl::is_class<typename bsl::remove_cv<t_DERIVED>::type>::value && bsl::is_convertible<typename bsl::remove_cv<t_DERIVED>::type *, typename bsl::remove_cv<t_BASE>::type *>::value>

Description

This struct template provides a type trait to determine if one class is an accessible base class of another class. Note that, while similar to std::is_base_of, when the derived relationship is via private, protected, or ambiguous inheritance IsAccessibleBaseOf evaluates to false.

Base Classes

Name	Description
`bsl::integral_constant<bool, bsl::is_class<typename bsl::remove_cv<t_BASE>::type>::value && bsl::is_class<typename bsl::remove_cv<t_DERIVED>::type>::value && bsl::is_convertible<typename bsl::remove_cv<t_DERIVED>::type , typename bsl::remove_cv<t_BASE>::type >::value>`	Metafunction representing a compile-time constant of the specified (template parameter) `t_TYPE` with the specified (template parameter) `t_VALUE`.

Type Aliases

Name	Description
`type`	Alias for this `integral_constant` specialization.
`value_type`	Alias for the (template parameter) `t_TYPE`.

Member Functions

Name	Description
`operator()`	Return a copy of the template argument `t_VALUE`.
`operator t_TYPE`	Return a copy of the template argument `t_VALUE`.

Static Data Members

Name	Description
`value`	The compile-time constant value of this metafunction.