tokit 0.0.0

Blazing fast parser combinators: parse-while-lexing (zero-copy), deterministic LALR-style parsing, no backtracking. Flexible emitters for fail-fast runtime or greedy compiler diagnostics
Documentation 
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use super::*;

/// A parser that always succeeds without consuming any input.
#[derive(Debug, Clone, Copy, Default, PartialEq, Eq, Hash)]
pub struct Empty(());

impl Empty {
  /// Creates a parser that always succeeds without consuming any input.
  #[cfg_attr(not(tarpaulin), inline(always))]
  pub const fn new() -> Self {
    Self(())
  }
}

impl<'inp, L, Ctx, Lang> ParseInput<'inp, L, (), Ctx, Lang> for Empty
where
  L: Lexer<'inp>,
  Ctx: ParseContext<'inp, L, Lang>,
  Lang: ?Sized,
{
  #[cfg_attr(not(tarpaulin), inline(always))]
  fn parse_input(
    &mut self,
    _inp: &mut InputRef<'inp, '_, L, Ctx, Lang>,
  ) -> Result<(), <Ctx::Emitter as Emitter<'inp, L, Lang>>::Error>
  where
    L: Lexer<'inp>,
    Ctx: ParseContext<'inp, L, Lang>,
  {
    Ok(())
  }
}