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Attribute

Struct Attribute 

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pub struct Attribute<T: ?Sized> { /* private fields */ }
Expand description

Typed name of an ɴsɪ attribute.

T is the data shape the attribute accepts. Slice-typed T = [U] means the attribute carries an array of U.

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impl<T: ?Sized> Attribute<T>

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pub const fn new(name: &'static str) -> Self

Create a new typed attribute name. const-callable so consumers can declare attribute constants in their own crates.

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pub const fn name(&self) -> &'static str

The wire-side string identifier this attribute uses.

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pub fn ustr(&self) -> Ustr

Interned, null-terminated identifier suitable for C-FFI use. The underlying Ustr caches the interning so repeated calls for the same name reuse the same allocation – there is no per-call CString dance.

Available with the ustr feature.

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pub fn as_c_ptr(&self) -> *const c_char

Raw C-FFI pointer to the null-terminated identifier. The lifetime is effectively 'static because ustr::Ustr never frees its strings. Pass this directly to C functions expecting a const char*.

Available with the ustr feature.

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impl<T: ?Sized> Clone for Attribute<T>

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fn clone(&self) -> Self

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<T: ?Sized> Debug for Attribute<T>

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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<T: ?Sized> Copy for Attribute<T>

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impl<T: ?Sized> Send for Attribute<T>

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impl<T: ?Sized> Sync for Attribute<T>

Auto Trait Implementations§

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impl<T> Freeze for Attribute<T>
where T: ?Sized,

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impl<T> RefUnwindSafe for Attribute<T>
where T: ?Sized,

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impl<T> Unpin for Attribute<T>
where T: ?Sized,

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impl<T> UnsafeUnpin for Attribute<T>
where T: ?Sized,

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impl<T> UnwindSafe for Attribute<T>
where T: ?Sized,

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<U> 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.