On Fri, Sep 21, 2012 at 7:58 AM, Dodji Seketeli <[email protected]> wrote:
> + for (tree d = getdecls (); d; d = TREE_CHAIN (d))
> + {
> + /* There are cases where D itself is a TREE_LIST. See in
> + push_local_binding where the list of decls returned by
> + getdecls is built. */
> + decl = TREE_CODE (d) == TREE_LIST ? TREE_VALUE (d) : d;
> + if (TREE_CODE (decl) == VAR_DECL
> + && (! TREE_USED (decl) || !DECL_READ_P (decl))
> + && ! DECL_IN_SYSTEM_HEADER (decl)
> + && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl)
> + && TREE_TYPE (decl) != error_mark_node
> + && (!CLASS_TYPE_P (TREE_TYPE (decl))
> + || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
> + {
> + if (! TREE_USED (decl))
> + warning (OPT_Wunused_variable, "unused variable %q+D", decl);
> + else if (DECL_CONTEXT (decl) == current_function_decl
> + && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
> + && errorcount == unused_but_set_errorcount)
> + {
> + warning (OPT_Wunused_but_set_variable,
> + "variable %q+D set but not used", decl);
> + unused_but_set_errorcount = errorcount;
> + }
> + }
> + }
>
this is block of code that qualifies to be a function in its own.
the condition is quite impressive...
-- Gaby
