UML Class Diagrams from C++ Code
I needed a UML class diagram of the classes I use in the implementation of CScout refactoring browser. I drew the last such diagram on paper about four years ago, so it was definitely out of date. I always say that whenever possible documentation should be automatically generated from the code, so I decided to automate the task.
An appropriate tool for this job is UMLGraph.
Unfortunately for the task at hand,
its input is following the Java syntax.
Getting the appropriate data from the C++ code, didn't require more than
10 minutes of work.
In this particular C++ code I only used single inheritance, and the subclass and
superclass always appeared on the same line.
Taking advantage of these two facts I could simply locate the lines
containing public :
,
and convert them into a corresponding Java class definition.
Thus
class Mysql: public Sql {
// ...
}
class Mysql extends Sql {}
The following pipeline was enough to take inheritance specifications from the C++ code and transform them into UMLGraph's Java syntax.
grep -h ":.*public" *.h |
sed 's/class //;s/://;s/public //;s/{//;s/ */ /g' |
awk '{print "class " $1 " extends " $2 " {}"}'
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