egcs 970828 : Explicit call of a constructor

[Klaus-Georg Adams]

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> For reasons which are too long to explain here, I need to reconstruct
> the virtual table of objects. 
> 
> To do it, with gcc 2.7.2, I am doing an axplicit call to a specific
> constructor. So I write the following code :
> 
> BX_Connection::CM_RebuildOBJ(CM_Restart *rsq)
> {
>    BX_Connection *obj = this;
>    obj->BX_Connection::BX_Connection(rsq);
> }
> 
> This is not beautifull, but it works wonderfull !
> 
> But ... When I compile this code with egcs, I've got a parse error
> before '('.
> 
> There is nothing about this in C++ draft. What is Cygnus position about
> it ? Can we consider it as a egcs' bug ?

No, it's a bug in your program.
If you have to do a hack like that you should use the placement new
syntax:

void* operator new( unsigned int, void* p ) { return p; }

struct CM_Restart;
struct BX_Connection {
	BX_Connection( CM_Restart* );
	void CM_RebuildOBJ( CM_Restart * );
};

void
BX_Connection::CM_RebuildOBJ(CM_Restart *rsq)
{
   new (this) BX_Connection(rsq);	
}

-- kga
-------------------------------------------------------------------------
Klaus-Georg Adams        Email: Klaus-Georg.Adams@chemie.uni-karlsruhe.de
Institut f. Anorg. Chemie II                           Tel: 0721 608 3485
Uni Karlsruhe
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