1.29.0[][src]Struct proc_macro::Ident

pub struct Ident { /* fields omitted */ }

An identifier (ident).

Methods

impl Ident
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Creates a new Ident with the given string as well as the specified span. The string argument must be a valid identifier permitted by the language, otherwise the function will panic.

Note that span, currently in rustc, configures the hygiene information for this identifier.

As of this time Span::call_site() explicitly opts-in to "call-site" hygiene meaning that identifiers created with this span will be resolved as if they were written directly at the location of the macro call, and other code at the macro call site will be able to refer to them as well.

Later spans like Span::def_site() will allow to opt-in to "definition-site" hygiene meaning that identifiers created with this span will be resolved at the location of the macro definition and other code at the macro call site will not be able to refer to them.

Due to the current importance of hygiene this constructor, unlike other tokens, requires a Span to be specified at construction.

🔬 This is a nightly-only experimental API. (proc_macro_raw_ident #54723)

Same as Ident::new, but creates a raw identifier (r#ident).

Returns the span of this Ident, encompassing the entire string returned by as_str.

Configures the span of this Ident, possibly changing its hygiene context.

Trait Implementations

impl !Send for Ident
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impl !Sync for Ident
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impl Clone for Ident
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Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl From<Ident> for TokenTree
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Performs the conversion.

impl Display for Ident
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Prints the identifier as a string that should be losslessly convertible back into the same identifier.

Formats the value using the given formatter. Read more

impl Debug for Ident
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Formats the value using the given formatter. Read more

Blanket Implementations

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T> ToOwned for T where
    T: Clone
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Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into #41263)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> ToString for T where
    T: Display + ?Sized
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Converts the given value to a String. Read more

impl<T> From for T
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Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from #33417)

Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Immutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
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🔬 This is a nightly-only experimental API. (get_type_id #27745)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from #33417)

Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized
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Mutably borrows from an owned value. Read more

impl<E> SpecializationError for E
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🔬 This is a nightly-only experimental API. (rustc_private #27812)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S is the encoder/decoder state type, T is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

impl<T> Send for T where
    T: ?Sized
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impl<T> Sync for T where
    T: ?Sized
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impl<T> Erased for T
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impl<T> Erased for T