MutationOperation< PAR, MUT > Class Template Reference

Description

template<class PAR, class MUT>
class lib::diff::anonymous_namespace{tree-mutator-attribute-binding.hpp}::MutationOperation< PAR, MUT >

Definition at line 295 of file tree-mutator-attribute-binding.hpp.

Public Member Functions
	MutationOperation (BareEntryID const &attribID, MUT clo, PAR &&chain)
virtual bool	injectNew (GenNode const &spec) override
	default setup: silently absorb insert. More...
virtual bool	mutateChild (GenNode const &spec, TreeMutator::Handle targetBuff) override
	if this binding layer is in charge, then invoke the closure, which is assumed to construct a nested TreeMutator into the provided Buffer, able to deal with the nested attribute object referred by this binding
Public Member Functions inherited from AttributeBindingBase< PAR >
virtual bool	accept_until (GenNode const &spec) override
	there is no real support for navigating to a 'position', since attribute / data field binding has no notion of ordering. More...
virtual bool	acceptSrc (GenNode const &spec) override
	accept status quo, after verifying the spec from the diff verb
virtual bool	findSrc (GenNode const &refSpec) override
virtual bool	matchSrc (GenNode const &spec) override
	ensure the given spec is deemed appropriate at that point. More...
virtual void	skipSrc (GenNode const &refSpec) override
	any reordering or deletion of object fields is prohibited More...

Private Member Functions
	ASSERT_VALID_SIGNATURE (MUT, void(TreeMutator::Handle))

Private Attributes
MUT	mutatorBuilder_

Additional Inherited Members
Protected Member Functions inherited from AttributeBindingBase< PAR >
	AttributeBindingBase (BareEntryID attribID, PAR &&chain)
void	__ifApplicable_refuse_to (Literal oper, GenNode const &spec)
bool	isApplicable (GenNode const &spec)
	hard wired "selector predicate" for this binding layer. More...

Member Function Documentation

injectNew()

virtual bool injectNew ( GenNode const &  spec )

inlineoverridevirtual

default setup: silently absorb insert.

Remarks

this whole binding flavour (MutateOperation) deals with an odd corner case, namely an object valued attribute, which is deliberately treated as nested scope; a sub-scope accessed by name. Since attributes do not support any notion of "inserting" or "reordering" anyway, it is typical in such a situation for the implementation data structure to manage the underlying object automatically or default construct it anyway; moreover it would be pointless to define a setter, since the whole point is not to assign, but rather to enter and populate the nested target object. Yet, the diff language requires us to send an empty initial value at least once prior to mutation.

Note

if you really need a dedicated custom setter, just define it after the mutateAttribute spec; it's implementation will then be layered on top and shadow this default case.

Definition at line 341 of file tree-mutator-attribute-binding.hpp.

Inheritance diagram for MutationOperation< PAR, MUT >:

Collaboration diagram for MutationOperation< PAR, MUT >:

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The documentation for this class was generated from the following file:

• tree-mutator-attribute-binding.hpp