openvrml::node_impl_util Namespace Reference

Utility classes to facilitate node implementations. More...

Classes
class	ptr_to_polymorphic_mem
	Abstract base class for a pointer-to-polymorphic-member type. More...
class	ptr_to_polymorphic_mem_impl
	Concrete pointer-to-polymorphic-member type. More...
class	abstract_node_type
	Abstract base for openvrml::node_type subclasses. More...
class	node_type_impl
	A template for concrete node_types. More...
class	event_listener_base
	Abstract base for event_listener implementations. More...
class	event_emitter_base
	Abstract base for event_emitter implementations. More...
class	abstract_node
	Abstract base class for node implementations. More...
struct	BindableNodeConcept
	Concept checking class to validate that a template parameter is a model of the Bindable Node concept. More...
class	bound_node_stack
	A stack of bindable nodes. More...

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Detailed Description

Utility classes to facilitate node implementations.

While the API comprising the members of the openvrml namespace provides everything necessary to implement nodes, node implementation can be very verbose. The members of the openvrml::node_impl_util namespace can make node implementation more concise by abstracting and providing code that many node implementations are likely to have in common.

In particular, node_type_impl centralizes the logic for generalized field access. By using an instance of this class template for your openvrml::node_type implementation you can avoid a lot of tedious and repetitive code to implement openvrml::node::do_field, openvrml::node::do_event_listener, and openvrml::node::do_event_emitter.