Add a New Built-in Function

All built-in functions are children of NodeFunctionBuiltin class and are generated by gen_builtin.pl Perl script. To define a new built-in function you have to do:

Write a new unit test to ../samples/tests.txt.
Write the function declaration in format $funcdecl = 'funcName(arguments) : return'.
Define the code for including files.
Define the body of the built-in function.
Call genBFClass('built-in name', 'class name', number of parameters, code, includes) function.
Run make to regenerate the classes and rebuild the related code.
Add the newly generated files classname.h and classname.cpp to Qt Creator project.
Check the changes for memory leaks using valgrind ./graphal_cli --unit-tests ../samples/tests.txt.
Commit/send me the code.

$funcdecl = 'getAdjacencyMatrix(graph) : array';

$include = <<END_OF_CODE;
#include "valuegraph.h"
END_OF_CODE

$code = <<END_OF_CODE;
	ValueGraph* g = NULL;

	if((g = par[0]->toValueGraph()) != NULL)
		return g->getAdjacencyMatrix();
	else
	{
		WARN_P(_("Bad parameters type: $funcdecl"));
		return VALUENULL;
	}
END_OF_CODE

genBFClass('getAdjacencyMatrix', 'NodeBuiltinGetAdjacencyMatrix', 1, $code, $include);