Enum proc_macro::TokenTree

1.29.0 · source ·
pub enum TokenTree {
    Group(Group),
    Ident(Ident),
    Punct(Punct),
    Literal(Literal),
}
Expand description

A single token or a delimited sequence of token trees (e.g., [1, (), ..]).

Variants§

§

Group(Group)

A token stream surrounded by bracket delimiters.

§

Ident(Ident)

An identifier.

§

Punct(Punct)

A single punctuation character (+, ,, $, etc.).

§

Literal(Literal)

A literal character ('a'), string ("hello"), number (2.3), etc.

Implementations§

Returns the span of this tree, delegating to the span method of the contained token or a delimited stream.

Configures the span for only this token.

Note that if this token is a Group then this method will not configure the span of each of the internal tokens, this will simply delegate to the set_span method of each variant.

Trait Implementations§

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more

Prints token tree in a form convenient for debugging.

Formats the value using the given formatter. Read more

Prints the token tree as a string that is supposed to be losslessly convertible back into the same token tree (modulo spans), except for possibly TokenTree::Groups with Delimiter::None delimiters and negative numeric literals.

Formats the value using the given formatter. Read more
Extends a collection with the contents of an iterator. Read more
🔬This is a nightly-only experimental API. (extend_one #72631)
Extends a collection with exactly one element.
🔬This is a nightly-only experimental API. (extend_one #72631)
Reserves capacity in a collection for the given number of additional elements. Read more
Converts to this type from the input type.
Converts to this type from the input type.
Converts to this type from the input type.
Converts to this type from the input type.

Creates a token stream containing a single token tree.

Converts to this type from the input type.

Collects a number of token trees into a single stream.

Creates a value from an iterator. Read more
Converts the given value to a String. Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
Converts the given value to a String. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.