Struct mx_tag

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#[repr(C)]pub struct mx_tag {
    pub lo: u64,
    pub hi: u64,
}

Expand description

Type tag for runtime type identification.

A 128-bit identifier split into two 64-bit halves for C compatibility. Used to identify concrete types and trait interfaces at runtime.

§Generation

Tags should be generated as compile-time constants, typically using a hash of the fully-qualified type/trait path. The #[miniextendr] attribute macro handles this automatically.

§Comparison

Tags are compared by value equality of both lo and hi fields.

§Layout Guarantee

This type is #[repr(C)] and its layout is frozen. Fields will never be reordered, and new fields will only be appended.

Fields§

§lo: u64

Lower 64 bits of the type tag.

§hi: u64

Upper 64 bits of the type tag.

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impl mx_tag

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pub const fn new(lo: u64, hi: u64) -> Self

Create a new type tag from two 64-bit values.

§Arguments

lo - Lower 64 bits
hi - Upper 64 bits

§Example

const MY_TAG: mx_tag = mx_tag::new(0x1234_5678_9abc_def0, 0xfed_cba9_8765_4321);

Trait Implementations§

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impl Clone for mx_tag

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fn clone(&self) -> mx_tag

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl Debug for mx_tag

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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 Eq for mx_tag

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#[doc(hidden)]
fn assert_fields_are_eq(&self)

🔬This is a nightly-only experimental API. (derive_eq_internals)

1.0.0 (const: unstable) · Source§

#[doc(hidden)]
fn assert_receiver_is_total_eq(&self)

👎Deprecated since 1.95.0:

implementation detail of #[derive(Eq)]

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impl Hash for mx_tag

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

Feeds this value into the given Hasher. Read more

1.3.0 · Source§

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 PartialEq for mx_tag

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

Tests for self and other values to be equal, and is used by ==.

1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

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impl StructuralPartialEq for mx_tag

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Auto Trait Implementations§

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Blanket Implementations§

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impl<T> Any for T
where 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 T
where 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 T
where 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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. 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 for T
where 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> RClone for T
where T: Clone,

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fn clone(&self) -> T

Create a deep copy of this value.

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impl<T> RCopy for T
where T: Copy,

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fn copy(&self) -> T

Create a bitwise copy of this value. Read more

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fn is_copy(&self) -> bool

Check if this type implements Copy. Read more

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impl<T> RDebug for T
where T: Debug,

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fn debug_str(&self) -> String

Get a compact debug string representation.

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fn debug_str_pretty(&self) -> String

Get a pretty-printed debug string with indentation.

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impl<T> RHash for T
where T: Hash,

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