[Uml-devel] [Bug 119125] New: Preprocessor keywords ignored which causes endless loop in code import

[William Cleveland]

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http://bugs.kde.org/show_bug.cgi?id=119125         
           Summary: Preprocessor keywords ignored which causes endless loop
                    in code import
           Product: umbrello
           Version: unspecified
          Platform: SuSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: umbrello-devel.kde.org
        ReportedBy: whclevelandjr msn com


Version:            (using KDE KDE 3.5.0)
Installed from:    SuSE RPMs
OS:                Linux

Importing C++ header files that have circular references (using #include) causes the code import to enter a infinite loop and causes the whole KDE to hang.

Problem stems from preprocessor commands being ignored.

One can argue the following example is bad coding form, but gcc, cc, and msvc have no problems with the files.

( This situation presented itself when we decided to place the child classes in seperate header files and still only require the base.h file to be included in the original source code )

Example problem headers:

base.h contains:

#ifndef __BASE__
#define __BASE__
class Base
{
...
}

// children includes
#include "child.h"
#include "child2.h"

#endif



child.h contains:

#ifndef __CHILD__
#define __CHILD__

#include "base.h"

class Child : public Base
{
...
}
#endif


child2.h contains:

#ifndef __CHILD2__
#define __CHILD2__

#include "base.h"

class Child2 : public Base
{
...
}
#endif