Enum MacroRuleNode

#[non_exhaustive]
pub enum MacroRuleNode {
    Matcher,
    Transcriber,
    Repetition,
    FragmentName,
    FragmentSpecifier,
    MetaVariableMatch,
    RepetitionQuantifier,
    RepetitionSeparator,
    Terminal(Terminal),
}

Various nodes that can be expected in a macro_rules! invocation.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Matcher

A matcher (everything that comes before the => of a macro rule.

Transcriber

A transcriber (everything that comes after the => of a macro rule.

Repetition

A repetition.

FragmentName

A fragment name.

FragmentSpecifier

A fragment type specifier (ident, expr, …).

MetaVariableMatch

A meta variable match, such as $a:ident.

RepetitionQuantifier

A repetition quantifier (?, *, +).

RepetitionSeparator

A repetition separator (the , in $( $expr ),*).

Terminal(Terminal)

Any terminal.

Trait Implementations

impl Clone for MacroRuleNode

fn clone(&self) -> MacroRuleNode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MacroRuleNode

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

Formats the value using the given formatter.

impl PartialEq for MacroRuleNode

fn eq(&self, other: &MacroRuleNode) -> 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 StructuralPartialEq for MacroRuleNode