Struct glib::translate::Stash
[−]
[src]
pub struct Stash<'a, P: Copy, T: ?Sized + ToGlibPtr<'a, P>>(pub P, pub T::Storage);
Helper type that stores temporary values used for translation.
P
is the foreign type pointer and the first element of the tuple.
T
is the Rust type that is translated.
The second element of the tuple is the temporary storage defined
by the implementation of ToGlibPtr<P> for T
Say you want to pass a *mut GdkWindowAttr
to a foreign function. The Stash
will own a GdkWindowAttr
and a CString
that GdkWindowAttr::title
points into.
impl <'a> ToGlibPtr<'a, *mut ffi::GdkWindowAttr> for WindowAttr { type Storage = (Box<ffi::GdkWindowAttr>, Stash<'a, *const c_char, Option<String>>); fn to_glib_none(&'a self) -> Stash<*mut ffi::GdkWindowAttr, WindowAttr> { let title = self.title.to_glib_none(); let mut attrs = Box::new(ffi::GdkWindowAttr { title: title.0, // .... }); Stash(&mut *attrs, (attrs, title)) } }