Struct ra_ap_mbe::DeclarativeMacro

pub struct DeclarativeMacro { /* private fields */ }

This struct contains AST for a single macro_rules definition. What might be very confusing is that AST has almost exactly the same shape as tt::TokenTree, but there’s a crucial difference: in macro rules, $ident and $()* have special meaning (see Var and Repeat data structures)

Implementations

impl DeclarativeMacro

pub fn parse_macro_rules(tt: &Subtree) -> Result<DeclarativeMacro, ParseError>

The old, macro_rules! m {} flavor.

pub fn parse_macro2(tt: &Subtree) -> Result<DeclarativeMacro, ParseError>

The new, unstable macro m {} flavor.

pub fn expand(&self, tt: &Subtree) -> ExpandResult<Subtree>

pub fn map_id_down(&self, id: TokenId) -> TokenId

pub fn map_id_up(&self, id: TokenId) -> (TokenId, Origin)

pub fn shift(&self) -> Shift

Trait Implementations

impl Clone for DeclarativeMacro

fn clone(&self) -> DeclarativeMacro

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DeclarativeMacro

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

Formats the value using the given formatter.

impl PartialEq<DeclarativeMacro> for DeclarativeMacro

fn eq(&self, other: &DeclarativeMacro) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for DeclarativeMacro

impl StructuralEq for DeclarativeMacro

impl StructuralPartialEq for DeclarativeMacro