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Class template binding

boost::type_erasure::binding

Synopsis

// In header: <boost/type_erasure/binding.hpp>

template<typename Concept> 
class binding {
public:
  // construct/copy/destruct
  binding();
  template<typename Map> explicit binding(const Map &);
  template<typename Map> binding(const static_binding< Map > &);
  template<typename Concept2, typename Map> 
    binding(const binding< Concept2 > &, const Map &);
  template<typename Concept2, typename Map> 
    binding(const binding< Concept2 > &, const static_binding< Map > &);

  // friend functions
  friend bool operator==(const binding &, const binding &);
  friend bool operator!=(const binding &, const binding &);
};

Description

Stores the binding of a Concept to a set of actual types. Concept is interpreted in the same way as with any.

binding public construct/copy/destruct

  1. binding();

    Requires:

    relaxed must be in Concept.

    Throws:

    Nothing.
  2. template<typename Map> explicit binding(const Map &);

    Requires:

    Map must be an MPL map with an entry for each placeholder referred to by Concept.

    Throws:

    Nothing.
  3. template<typename Map> binding(const static_binding< Map > &);

    Requires:

    Map must be an MPL map with an entry for each placeholder referred to by Concept.

    Throws:

    Nothing.
  4. template<typename Concept2, typename Map> 
      binding(const binding< Concept2 > & other, const Map &);

    Converts from another set of bindings.

    Requires:

    Map must be an MPL map with an entry for each placeholder referred to by Concept. The mapped type should be the corresponding placeholder in Concept2.

    Throws:

    std::bad_alloc
  5. template<typename Concept2, typename Map> 
      binding(const binding< Concept2 > & other, const static_binding< Map > &);

    Converts from another set of bindings.

    Requires:

    Map must be an MPL map with an entry for each placeholder referred to by Concept. The mapped type should be the corresponding placeholder in Concept2.

    Throws:

    std::bad_alloc

binding friend functions

  1. friend bool operator==(const binding & lhs, const binding & rhs);

    Returns:

    true iff the sets of types that the placeholders bind to are the same for both arguments.

    Throws:

    Nothing.
  2. friend bool operator!=(const binding & lhs, const binding & rhs);

    Returns:

    true iff the arguments do not map to identical sets of types.

    Throws:

    Nothing.

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