DiffTreeApplicationSimple_test Class Reference

Description

Test:

Demonstration/Concept: apply a "tree diff" to reshape structured data.

• the demo_one() constructs a "GenNode object", which is then mutated by applying a diff.
• the demo_two() uses a STL collection (vector) as opaque data structure, establishes a diff binding to that structure and then applies basically the same diff to mutate the target data.

  Remarks

  This test is meant as introductory example to explain the meaning of the terms "diff", "diff verbs", "application", "mutation", "target data" and thus to show the basic ideas of Lumiera's »Diff Framework«. As can be expected, these examples are somewhat artificial and everything is made up as to look simple, while deliberately a lot of technical intricacies will be swept under the carpet.

  See also

  DiffTreeApplication_test extended demonstration of possible diff operations

  DiffComplexApplication_test handling arbitrary data structures

  GenericRecord_test

  GenNode_test

  DiffListApplication_test

  diff-tree-application.hpp

  tree-diff.hpp

  tree-diff-traits.hpp

Definition at line 92 of file diff-tree-application-simple-test.cpp.

Private Member Functions
void	demo_one ()
void	demo_two ()
virtual void	run (Arg)
MutationMessage	someDiff ()
	a change represented symbolically as »diff sequence«. More...
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
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
Static Private Attributes inherited from DiffLanguage< TreeDiffInterpreter, GenNode >
static const DiffStep	NIL
	fixed "invalid" marker token More...

Member Function Documentation

someDiff()

MutationMessage someDiff ( )

inlineprivate

a change represented symbolically as »diff sequence«.

This is a sequence of verbs to describe what should be done in order to mutate the target data. This example can be read as

• first accept an existing element "a" as-is
• after that insert a new element "d" into the sequence
• next delete an existing element "b" from the sequence
• and finally accept an existing element "c" into the result

Definition at line 114 of file diff-tree-application-simple-test.cpp.

demo_one()

void demo_one ( )

inlineprivate

Test:

mutate a Record<GenNode> by applying the sample diff

Definition at line 126 of file diff-tree-application-simple-test.cpp.

demo_two()

void demo_two ( )

inlineprivate

Test:

mutate a STL collection opaquely by applying the sample diff

Definition at line 141 of file diff-tree-application-simple-test.cpp.

Inheritance diagram for DiffTreeApplicationSimple_test:

Collaboration diagram for DiffTreeApplicationSimple_test:

---

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

• diff-tree-application-simple-test.cpp