Struct TokenTree

pub struct TokenTree<Span> {
    pub kind: TokenTreeKind<Span>,
    pub span: Span,
}

An untyped tree of tokens.

This type allows the end-user to represent the tokens that is passed in the macro invocation. It is not exactly the same as proc_macro::TokenTree, as the tokens are grouped differently ¹. Writing a “proc_macro::TokenTree to TokenTree” should not be too hard, but is not the scope of this crate.

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1. For instance, += is represented as a single token in declarative macros but as “+ followed by =” in procedural macros (ref). ↩

Fields

kind: TokenTreeKind<Span>

What kind of token tree is this?

span: Span

Its position in the input code (useful for error message generation).

Trait Implementations

impl<Span: Clone> Clone for TokenTree<Span>

fn clone(&self) -> TokenTree<Span>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Span: Debug> Debug for TokenTree<Span>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Span: PartialEq> PartialEq for TokenTree<Span>

fn eq(&self, other: &TokenTree<Span>) -> bool

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

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

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

impl<Span> StructuralPartialEq for TokenTree<Span>