KDev-PG-Qt and unions

[Jonathan Schmidt-Dominé - Developer]

Hi Milian!

struct C_Ast
{
	union
	{
		A_Ast *a;
		B_Ast *b;
	};
};
...
void visitC_Ast(C_Ast *c)
{
	if(c->a) // Like if(reinterpret_cast<A_Ast*>(c->b))
		...
	else if(c->b) // Like else if(reinterpret_cast<B_Ast*>(c->a)), of course 
both conditions are identical
		...
}
C++ won't care about the correct usage, unions are more or less short-forms 
for reinterpret-casts. The programmer has to care about the actual state of 
the union.

Jonathan
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