Trait bevy::reflect::TupleStruct

pub trait TupleStruct: Reflect {
    // Required methods
    fn field(&self, index: usize) -> Option<&(dyn Reflect + 'static)>;
    fn field_mut(&mut self, index: usize) -> Option<&mut (dyn Reflect + 'static)>;
    fn field_len(&self) -> usize;
    fn iter_fields(&self) -> TupleStructFieldIter<'_> ⓘ;
    fn clone_dynamic(&self) -> DynamicTupleStruct;
}
Expand description

A trait used to power tuple struct-like operations via reflection.

This trait uses the Reflect trait to allow implementors to have their fields be dynamically addressed by index.

When using #[derive(Reflect)] on a tuple struct, this trait will be automatically implemented.

Example

use bevy_reflect::{Reflect, TupleStruct};

#[derive(Reflect)]
struct Foo(u32);

let foo = Foo(123);

assert_eq!(foo.field_len(), 1);

let field: &dyn Reflect = foo.field(0).unwrap();
assert_eq!(field.downcast_ref::<u32>(), Some(&123));

Required Methods§

fn field(&self, index: usize) -> Option<&(dyn Reflect + 'static)>

Returns a reference to the value of the field with index index as a &dyn Reflect.

fn field_mut(&mut self, index: usize) -> Option<&mut (dyn Reflect + 'static)>

Returns a mutable reference to the value of the field with index index as a &mut dyn Reflect.

fn field_len(&self) -> usize

Returns the number of fields in the tuple struct.

fn iter_fields(&self) -> TupleStructFieldIter<'_> ⓘ

Returns an iterator over the values of the tuple struct’s fields.

fn clone_dynamic(&self) -> DynamicTupleStruct

Clones the struct into a DynamicTupleStruct.

Trait Implementations§

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impl GetTupleStructField for dyn TupleStruct + 'static

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fn get_field<T>(&self, index: usize) -> Option<&T>where T: Reflect,

Returns a reference to the value of the field with index index, downcast to T.
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fn get_field_mut<T>(&mut self, index: usize) -> Option<&mut T>where T: Reflect,

Returns a mutable reference to the value of the field with index index, downcast to T.

Implementors§