#[repr(transparent)]
pub struct Closure { /* private fields */ }

Implementations

Creates a new closure around a Rust closure.

Note that RustClosure provides more convenient and non-unsafe API for invoking closures. This type mostly exists for FFI interop.

Panics

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

Example
use glib::prelude::*;

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

// Invoking non-Rust closures is unsafe because of possibly missing
// argument and return value type checks.
let res = unsafe {
    closure
        .invoke_with_values(glib::Type::I32, &[1i32.to_value()])
        .and_then(|v| v.get::<i32>().ok())
        .expect("Invalid return value")
};

assert_eq!(res, 2);

Creates a new closure around a Rust closure.

Note that RustClosure provides more convenient and non-unsafe API for invoking closures. This type mostly exists for FFI interop.

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.

Creates a new closure around a Rust closure.

Safety

The captured variables of the closure must stay valid as long as the return value of this constructor does, and it must be valid to call the closure from any thread that is used by callers.

Invokes the closure with the given arguments.

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

Safety

The argument types and return value type must match the ones expected by the closure or otherwise the behaviour is undefined.

Closures created from Rust via e.g. Closure::new will panic on type mismatches but this is not guaranteed for closures created from other languages.

Invalidates the closure.

Invoking an invalidated closure has no effect.

Trait Implementations

Converts this type into a shared reference of the (usually inferred) input type.

Converts this type into a shared reference of the (usually inferred) input type.

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Converts to this type from the input type.

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

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

Returns the type identifier of Self.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

Ensures that the type has been registered with the type system.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

Returns a SendValue clone of self.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.