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copied!<p>this is a perfect use case for <a href="http://nedbatchelder.com/code/cog/" rel="nofollow noreferrer">python cog</a></p> <p>see also <a href="https://stackoverflow.com/questions/294520/what-are-some-techniques-for-code-generation">this answer</a>.</p> <p>I've used cog to generate handlers for a list of events, the handler code is very generic and i don't need to do special cases but i still have to write all the functions, so what i did is keep the events in a list in a .py file and the code to generate the boilerplate of the handlers in a python function. so i'm able to be faithful to the <a href="http://en.wikipedia.org/wiki/Don%27t_repeat_yourself" rel="nofollow noreferrer">DRY principle</a></p> <p>obviously you'll had to add cog to the pre-build of your makefile in order to work with your toolchain</p> <p><strong>Edit</strong> as an example of the code generation design required for adding boilerplate to your classes, i would do something like:</p> <h2>myCodeGeneration.py</h2> <pre><code>import cog ClassesToMock = [ [ 'IfaceA' , 'classA' , 'mockA' , ['void doSomething(int foo)' , 'int getSomething()'] , [ 'IfaceB', 'classB' , 'mockB' , ['static classA& getInstance()'] ] def addInterfaces( myStructure ): for classItem in myStructure: cog.outl('class %s { ' % classItem[0] ) for methodDecl in classItem[3]: cog.outl(' virtual %s = 0;' %methodDecl ) cog.outl(' } ') #implement your real classes normally def addMocks( myStructure ): for classItem in myStructure: cog.outl('class %s : public %s { ' % classItem[2] % classItem[0] ) for methodDecl in classItem[3]: cog.outl(' %s {' %methodDecl ) cog.outl(' MOCK_STUFF_MACRO ') cog.outl(' } ') cog.outl(' } ') </code></pre> <p>then in your header:</p> <h2>IfaceA.h</h2> <pre><code>/*[[[cog import cog import myCodeGeneration myCodeGeneration.addInterfaces( [ [ 'IfaceA' , 'classA' , 'mockA' , ['void doSomething(int foo)' , 'int getSomething()'] ] ) ]]]*/ //your code will be generated here //[[[end]]] </code></pre> <h2>mockA.h</h2> <pre><code>/*[[[cog import cog import myCodeGeneration myCodeGeneration.addMocks( [ [ 'IfaceA' , 'classA' , 'mockA' , ['void doSomething(int foo)' , 'int getSomething()'] ] ) ]]]*/ //your code will be generated here //[[[end]]] </code></pre> <p>Also, the issue if considering adding python to your c++ source is 'polluting' it or 'beautifying' it is largely a matter of taste and style. I consider that cog provides a complement to template style metaprogramming that is lacking in c++, giving the tools to the programmer to provide code tidiness and readability. But i don't expect everyone to agree</p> <p>For me the whole architectural design principle behind this approach is <strong>Don't Repeat Yourself</strong>. errors happen when we have to encode a method in several places manually. Let the computer automate what its automatable and encode things that cannot <em>just once</em>. As a side-effect, it will make your coding more enjoyable, both for writing it and reading it later.</p> <p>hope this helps</p>

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