Trait TTMacroExpander

pub trait TTMacroExpander {
    // Required method
    fn expand<'cx>(
        &self,
        ecx: &'cx mut ExtCtxt<'_>,
        span: Span,
        input: TokenStream,
    ) -> MacroExpanderResult<'cx>;

    // Provided method
    fn get_unused_rule(&self, _rule_i: usize) -> Option<(&Ident, Span)> { ... }
}

Represents a thing that maps token trees to Macro Results

Required Methods

fn expand<'cx>( &self, ecx: &'cx mut ExtCtxt<'_>, span: Span, input: TokenStream, ) -> MacroExpanderResult<'cx>

Provided Methods

fn get_unused_rule(&self, _rule_i: usize) -> Option<(&Ident, Span)>

Implementors

impl TTMacroExpander for DummyExpander

impl TTMacroExpander for MacroRulesMacroExpander

impl<F> TTMacroExpander for F

where F: for<'cx> Fn(&'cx mut ExtCtxt<'_>, Span, TokenStream) -> MacroExpanderResult<'cx>,