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Difference between revisions of "Papyrus/Codegen/Cpp description"

m (C++ profile)
m (Ansgar.radermacher.cea.fr moved page Codegen description to Papyrus/Codegen/Cpp description: Indicate that codegen belongs to Papyrus)
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Revision as of 15:58, 24 July 2014

The C++ code generation is available in the extra plugins of Papyrus. Make sure to unselect "Group features by category" and install "Papyrus C++ profile, view and code generation (Incubation)". C++ code generation is also automatically installed with [Papyrus_Qompass Qompass].

The C++ code generation comes with the following elements

  • A C++ specific profile and a view simplifying the edition
  • The code generator itself (enriched with the C++ profile)
  • A CDT editor integration, allowing you to edit the code of a class in a CDT editor


C++ profile

The C++ profile defines a set of stereotypes that add C++ specific information to a UML model. For instance, a parameter of an operation might be passed by value, reference or as a pointer. The latter can be specified via the stereotypes C_Cpp::Ref and C_Cpp::Ptr respectively.

In the sequence, we shortly describe all stereotypes in alphabetical order:

Stereotype Metaclass extension Description
Array Parameter or Property Indicate array with a given multiplicity. Unlike the multiplicities in UML, the array size can be an arbitrary expression, it must not be directly an integer.
Const Operation, Property or Parameter Declare that an operation, property or parameter is constant. Refer to the C++ semantics
External Classifier Indicate that no code should be generated for this classifier. Other classifiers will import this classifier with the include path specified in the "definition" attribute
ExternLibrary Package Mark a package as External Library. If an element of this package is used, the associated CDT project will be configured accordingly (include and library paths)
Friend Operation or Dependency Indicate that the operation is a C++ friend
Include Class, Package or PackageImport An arbitrary string that is added to header and body file. Although primarily intended for manual #include directives, it can be used for arbitrary definitions. The contents of the attribute "preBody" is added to a C++ body file before automatic #include statements, "body" after these.
Inline Operation Indicate that generator produces an inline method inside the header file
NoCodeGen Element Do not generate code for this element
Ptr Parameter or Property Make attribute or parameter declaration a pointer.
Ref Parameter or Property Call call by references semantics to the parameter
Template Class Indicate that the class is a C++ template
Union DataType Generate a union instead of a struct for this data type
Virtual Operation Make operation virtual
Volatile Operation, Parameter or Property Indicate the storage class

Code generator

More information will be added soon.

CDT integration

After installation, you can import the plugin org.eclipse.papyrus.cpp.test into your workspace. Within, you can find a sample model called "TestCDTintegration". Once opened, you should see the following screen.

Cdt-editor.png

The CDT editor appears within a tab of Papyrus. This enables a side-by-side view of model and code. The editor can be invoked via the context menu of a class, operation or transition (within a statechart). Synchronisation is done, when the CDT editor looses focus. When model elements change, e.g. is you rename an operation, the code is regenerated and an update is done. It should not be possible to get conflicting changes, since a change in the model implies that the focus is no longer on the textual editor, i.e. changes in the texteditor should be already in the model.

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