Struct gdnative_core::object::Null

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pub struct Null<T>(_);

Expand description

Represents an explicit null reference in method arguments. This works around type inference issues with Option. You may create Nulls with Null::null or GodotObject::null.

Implementations§

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impl<T: GodotObject> Null<T>

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pub fn null() -> Self

Creates an explicit null reference that can be used as a method argument.

Trait Implementations§

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impl<T: GodotObject> AsVariant for Null<T>

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type Target = T

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impl<T: GodotObject> AsArg<T> for Null<T>

Auto Trait Implementations§

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impl<T> UnwindSafe for Null<T>where
T: UnwindSafe,

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,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source§

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

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source§

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 for Twhere
U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source§

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

Performs the conversion.

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impl<T, U> TryInto for Twhere
U: TryFrom<T>,

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type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source§

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct gdnative_core::object::Null

Implementations§

impl<T: GodotObject> Null<T>

pub fn null() -> Self

Trait Implementations§

impl<T: GodotObject> AsVariant for Null<T>

type Target = T

impl<T: GodotObject> AsArg<T> for Null<T>

Auto Trait Implementations§

impl<T> RefUnwindSafe for Null<T>where
T: RefUnwindSafe,

impl<T> Send for Null<T>where
T: Send,

impl<T> Sync for Null<T>where
T: Sync,

impl<T> Unpin for Null<T>where
T: Unpin,

impl<T> UnwindSafe for Null<T>where
T: UnwindSafe,

Blanket Implementations§

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

type Error = Infallible

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

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

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

Struct gdnative_core::object::Null

Implementations§

impl<T: GodotObject> Null<T>

pub fn null() -> Self

Trait Implementations§

impl<T: GodotObject> AsVariant for Null<T>

type Target = T

impl<T: GodotObject> AsArg<T> for Null<T>

Auto Trait Implementations§

impl<T> RefUnwindSafe for Null<T>where T: RefUnwindSafe,

impl<T> Send for Null<T>where T: Send,

impl<T> Sync for Null<T>where T: Sync,

impl<T> Unpin for Null<T>where T: Unpin,

impl<T> UnwindSafe for Null<T>where T: UnwindSafe,

Blanket Implementations§

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

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

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

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

impl<T> RefUnwindSafe for Null<T>where
T: RefUnwindSafe,

impl<T> Send for Null<T>where
T: Send,

impl<T> Sync for Null<T>where
T: Sync,

impl<T> Unpin for Null<T>where
T: Unpin,

impl<T> UnwindSafe for Null<T>where
T: UnwindSafe,

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

impl<T> Borrow<T> for Twhere
T: ?Sized,

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

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

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,