On Wed, Sep 19, 2012 at 9:29 AM, Eric Botcazou <ebotca...@adacore.com> wrote: >> >> The language syntax would bind the conditional into the intializer, as in >> >> if (varpool_node *vnode = (node->try_variable () >> && vnode->finalized)) >> varpool_analyze_node (vnode); >> >> which does not type-match. >> >> So, if you want the type saftey and performance, the cascade is really >> unavoidable. > > Just write: > > varpool_node *vnode; > > if ((vnode = node->try_variable ()) && vnode->finalized) > varpool_analyze_node (vnode); > > This has been the standard style for the past 2 decades and trading it for > cascading if's is really a bad idea.
Indeed. Btw, can we not provide a specialization for dynamic_cast <>? This ->try_... looks awkward to me compared to the more familiar vnode = dynamic_cast <varpool_node> (node) but yeah - dynamic_cast is not a template ... (but maybe there is some standard library piece that mimics it?). Richard. > -- > Eric Botcazou
