Trait gdnative::core_types::ToVariantEq

pub trait ToVariantEq: Eq { }

Trait for types whose ToVariant implementations preserve equivalence.

This means that for all values a and b, a == b is equivalent to a.to_variant() == b.to_variant(). Most of the time, this means that to_variant must return a "value" type, such as a primitive i32, a GodotString, or a TypedArray.

This is mostly useful as a bound for Dictionary keys, where the difference between Rust's structural equality and Godot's referential equality semantics can lead to surprising behaviors.

This property cannot be checked by the compiler, so ToVariantEq has no extra methods.

Implementing ToVariantEq

The ToVariantEq trait is not derivable, because most derived implementations of ToVariant don't satisfy the requirements. If you are sure that your type satisfies the trait, specify that your type implements it with an empty impl:

#[derive(Eq, PartialEq, ToVariant)]
struct MyTypedInt(i32);

impl ToVariantEq for MyTypedInt {}

Implementations on Foreign Types

impl ToVariantEq for usize

impl<T> ToVariantEq for Option<T> where
    T: ToVariantEq, 

impl ToVariantEq for String

impl<'a, T> ToVariantEq for &'a mut T where
    T: ToVariantEq + ?Sized, 

impl ToVariantEq for i32

impl ToVariantEq for u16

impl ToVariantEq for u8

impl<'a, T> ToVariantEq for &'a T where
    T: ToVariantEq + ?Sized, 

impl ToVariantEq for ()

impl ToVariantEq for isize

impl ToVariantEq for i16

impl ToVariantEq for i8

impl<T> ToVariantEq for PhantomData<T>

impl ToVariantEq for u64

impl ToVariantEq for u32

impl ToVariantEq for str

impl ToVariantEq for bool

impl ToVariantEq for i64

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Implementors

impl ToVariantEq for GodotString

impl ToVariantEq for NodePath

impl ToVariantEq for Rid

impl ToVariantEq for Variant

impl<T> ToVariantEq for TypedArray<T> where
    T: Element + Eq, 

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