Re: std::vector in the union

[Torsten Müller]

Stephane Routelous <address@hidden> writes:

> I'm using yacc to parse a file.
>
> In my case, I would like to include some vectors from stl in the union.
> But, I can't because, in a union, you cannot have members with copy
> constructors.

Right. Another problem are destructors. There are two ways to work
around this: use use global variables or - better - use pointers to
STL containers. The following union would work right:

> typedef union
> {
> int iVal;
> double fVal;
> std::vector<MyObject*>* objectsVal;
> } YYSTYPE;

The vector is stored as pointer. A problem is cleaning up (deleting
the vector and its elements), especially in an error case. But in
practise this works very well.

Torsten