tree-diff-traits.hpp File Reference

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Description

Definitions and Properties to guide automated tree mutator binding.

Decision how to access the target structure and how to construct a suitable TreeMutator as attached to this opaque target data.

In a nutshell, if some private data structure wants to receive mutation diff messages...

• it must either implement the interface DiffMutable
• or provide the extension point void buildMutator(TreeMutator::Handle) Additionally, when the size of the custom TreeMutator object exceeds some hard wired limit (200 bytes), then the target type also needs to define the extension point size_t treeMutatorSize(TargetType)

All of this boils down to somewhere / somehow using the TreeMutator::Builder (a DSL API) to construct a custom binding, which allows to talk to our private data structure through the TreeMutator interface.

See also

DiffComplexApplication_test

DiffTreeApplication_test

DiffListApplication_test

GenNode_test

tree-diff.hpp

Definition in file tree-diff-traits.hpp.

#include "lib/diff/tree-mutator.hpp"
#include "lib/diff/diff-mutable.hpp"
#include "lib/null-value.hpp"
#include "lib/util.hpp"
#include <utility>
#include <stack>

Classes
struct	defines_custom_BufferSize< T >
class	exposes_MutatorBuilder< T >
	helper to detect presence of a TreeMutator builder function More...
struct	TreeDiffTraits< TAR, SEL >
struct	TreeDiffTraits< TAR, enable_if< exposes_MutatorBuilder< TAR > > >
struct	TreeDiffTraits< TAR, enable_if< is_base_of< DiffMutable, TAR > > >
struct	TreeMutatorSizeTraits< TAR, SEL >
	Heuristics to guide the allocation for nested TreeMutator. More...
struct	TreeMutatorSizeTraits< TAR, enable_if< defines_custom_BufferSize< TAR > > >
class	TreeDiffTraits< TAR, enable_if< exposes_MutatorBuilder< TAR > > >::Wrapper

Functions
template<typename T >
constexpr T *	getSelector ()
template<class TAR >
TreeDiffTraits< TAR >::Ret	mutatorBinding (TAR &subject)
	public access point to this configuration machinery More...
constexpr size_t	treeMutatorSize (...)

Namespaces
	lib
	Implementation namespace for support and library code.

Function Documentation

mutatorBinding()

TreeDiffTraits<TAR>::Ret lib::diff::mutatorBinding

(

TAR &

subject

)

public access point to this configuration machinery

Returns

depending on the circumstances, either a direct reference to DiffMutable, or a transient functor object implementing the DiffMutable interface

Warning

beware of dangling references! either use this call immediately inline, or (preferably) use an auto typed variable to hold the return value in local scope as long as necessary

Definition at line 204 of file tree-diff-traits.hpp.

References lib::diff::mutatorBinding().

Referenced by lib::diff::mutatorBinding().

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