DiffIgnoreChanges_test Class Reference

Description

Test:

Special case: build a TreeMutator to accept any change and do nothing.

Note

for sake of symmetry, this test uses the same verb sequence used in all the other tree diff tests, assuming this sequence covers pretty much all features supported by the tree diff language.

See also

DiffComplexApplication_test test case which indeed does a lot...

TreeMutator_test base operations of the adapter

diff-tree-application.hpp

tree-diff.hpp

Definition at line 78 of file diff-ignore-changes-test.cpp.

Private Types
using	DiffSeq = iter_stl::IterSnapshot< DiffStep >
Private Types inherited from TreeDiffLanguage
using	Interpreter = TreeDiffInterpreter
Private Types inherited from DiffLanguage< TreeDiffInterpreter, GenNode >
using	DiffToken = std::tuple< DiffVerb, GenNode >
using	DiffVerb = VerbToken< TreeDiffInterpreter, void(GenNode const &)>
using	Interpreter = TreeDiffInterpreter

Private Member Functions
void	fail_or_ignore ()
void	fish_for_content ()
DiffSeq	mutationDiff ()
DiffSeq	populationDiff ()
DiffSeq	reorderingDiff ()
virtual void	run (Arg)
Private Member Functions inherited from TreeDiffLanguage
	DiffStep_CTOR (ins)
	DiffStep_CTOR (del)
	DiffStep_CTOR (pick)
	DiffStep_CTOR (find)
	DiffStep_CTOR (skip)
	DiffStep_CTOR (after)
	DiffStep_CTOR (set)
	DiffStep_CTOR (mut)
	DiffStep_CTOR (emu)

Additional Inherited Members
Static Private Attributes inherited from DiffLanguage< TreeDiffInterpreter, GenNode >
static const DiffStep	NIL
	fixed "invalid" marker token More...

Member Function Documentation

fail_or_ignore()

void fail_or_ignore ( )

inlineprivate

Test:

fail or ignore, depending on toggle.

• the TreeMutator default implementation produces a failure, when it actually has to handle some diff verb
• yet a custom TreeMutator can be configured to ignoreAllChanges(), in which case it will consume any diff without effect. This test also demonstrates that the actual TreeMutator is built anew for each diff application (TreeMutator is meant to be disposable). Thus we may alter the behaviour of the diff binding dynamically.

  Remarks

  the actual use case for this is the TimelineGui, which either forwards changes to a TimelineWidget, or silently ignores them when the corresponding timeline is not opened.

Definition at line 158 of file diff-ignore-changes-test.cpp.

References TreeMutator::build(), PlantingHandle< BA, DEFAULT >::emplace(), and VERIFY_ERROR.

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fish_for_content()

void fish_for_content ( )

inlineprivate

Test:

fish some content and ignore everything else.

While the BlackHoleMutation binding generated by ignoreAllChanges() must be used as bottom layer of a custom TreeMutator, it is possible to layer a partial diff binding on top. This test demonstrates this with a single attribute binding, which just "fishes" any value mentioned in the diff for that specific attribute. Any other changes are silently ignored non the less...

Definition at line 201 of file diff-ignore-changes-test.cpp.

References TreeMutator::build(), and PlantingHandle< BA, DEFAULT >::emplace().

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Inheritance diagram for DiffIgnoreChanges_test:

Collaboration diagram for DiffIgnoreChanges_test:

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

• diff-ignore-changes-test.cpp