[][src]Struct glib::translate::Stash

pub struct Stash<'a, P: Copy, T: ?Sized + ToGlibPtr<'a, P>>(pub P, pub <T as ToGlibPtr<'a, P>>::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.

This example is not tested
impl <'a> ToGlibPtr<'a, *mut glib_sys::GdkWindowAttr> for WindowAttr {
    type Storage = (Box<glib_sys::GdkWindowAttr>, Stash<'a, *const c_char, Option<String>>);

    fn to_glib_none(&'a self) -> Stash<*mut glib_sys::GdkWindowAttr, WindowAttr> {
        let title = self.title.to_glib_none();

        let mut attrs = Box::new(glib_sys::GdkWindowAttr {
            title: title.0,
            // ....
        });

        Stash(&mut *attrs, (attrs, title))
    }
}

Auto Trait Implementations

impl<'a, P, T: ?Sized> Send for Stash<'a, P, T> where
    P: Send,
    <T as ToGlibPtr<'a, P>>::Storage: Send

impl<'a, P, T: ?Sized> Sync for Stash<'a, P, T> where
    P: Sync,
    <T as ToGlibPtr<'a, P>>::Storage: Sync

Blanket Implementations

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> Any for T where
    T: 'static + ?Sized
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