Struct glib::translate::Stash

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pub struct Stash<'a, P: Copy, T: ?Sized + ToGlibPtr<'a, P>>(pub P, pub <T as ToGlibPtr<'a, P>>::Storage);
Expand description

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))
    }
}

Tuple Fields§

§0: P§1: <T as ToGlibPtr<'a, P>>::Storage

Auto Trait Implementations§

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

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

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

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

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

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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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.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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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.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.