Struct glib::closure::RustClosure

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pub struct RustClosure(_);

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impl RustClosure

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pub fn new<F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static>( callback: F ) -> Self

Creates a new closure around a Rust closure.

See glib::closure! for a way to create a closure with concrete types.

Panics

Invoking the closure with wrong argument types or returning the wrong return value type will panic.

Example
use glib::prelude::*;

let closure = glib::RustClosure::new(|values| {
    let x = values[0].get::<i32>().unwrap();
    Some((x + 1).to_value())
});

assert_eq!(
    closure.invoke::<i32>(&[&1i32]),
    2,
);
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pub fn new_local<F: Fn(&[Value]) -> Option<Value> + 'static>( callback: F ) -> Self

Creates a new closure around a Rust closure.

See glib::closure_local! for a way to create a closure with concrete types.

Panics

Invoking the closure with wrong argument types or returning the wrong return value type will panic.

Invoking the closure from a different thread than this one will panic.

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pub fn invoke<R: TryFromClosureReturnValue>(&self, values: &[&dyn ToValue]) -> R

Invokes the closure with the given arguments.

For invalidated closures this returns the “default” value of the return type. For nullable types this is None, which means that e.g. requesting R = String will panic will R = Option<String> will return None.

Panics

The argument types and return value type must match the ones expected by the closure or otherwise this function panics.

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pub fn invoke_with_values( &self, return_type: Type, values: &[Value] ) -> Option<Value>

Invokes the closure with the given arguments.

For invalidated closures this returns the “default” value of the return type.

Panics

The argument types and return value type must match the ones expected by the closure or otherwise this function panics.

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pub fn invalidate(&self)

Invalidates the closure.

Invoking an invalidated closure has no effect.

Trait Implementations§

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impl AsRef<Closure> for RustClosure

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fn as_ref(&self) -> &Closure

Converts this type into a shared reference of the (usually inferred) input type.
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impl Clone for RustClosure

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fn clone(&self) -> RustClosure

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for RustClosure

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl From<RustClosure> for Closure

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fn from(c: RustClosure) -> Self

Converts to this type from the input type.
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impl Hash for RustClosure

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for RustClosure

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fn cmp(&self, other: &RustClosure) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval. Read more
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impl PartialEq<RustClosure> for RustClosure

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fn eq(&self, other: &RustClosure) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd<RustClosure> for RustClosure

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fn partial_cmp(&self, other: &RustClosure) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Eq for RustClosure

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impl StructuralEq for RustClosure

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impl StructuralPartialEq for RustClosure

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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 Twhere 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> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere 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 Twhere 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.