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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/// A trait for displaying in a SyntaxTree style.
pub trait DisplaySyntaxTree {
  /// Formats the value in a SyntaxTree style.
  ///
  /// - `level` is the current indentation level.
  /// - `indent` is the number of spaces to indent per level.
  fn fmt(&self, level: usize, indent: usize, f: &mut core::fmt::Formatter<'_>)
  -> core::fmt::Result;

  /// Returns a wrapper which implement `Display`.
  #[cfg_attr(not(tarpaulin), inline(always))]
  fn display(&self, level: usize, indent: usize) -> SyntaxTreeDisplay<'_, Self> {
    SyntaxTreeDisplay {
      t: self,
      indent,
      level,
    }
  }
}

impl<T: DisplaySyntaxTree + ?Sized> DisplaySyntaxTree for &T {
  #[cfg_attr(not(tarpaulin), inline(always))]
  fn fmt(
    &self,
    level: usize,
    indent: usize,
    f: &mut core::fmt::Formatter<'_>,
  ) -> core::fmt::Result {
    (*self).fmt(level, indent, f)
  }
}

/// A helper struct for displaying in a SyntaxTree.
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct SyntaxTreeDisplay<'a, T: ?Sized> {
  t: &'a T,
  indent: usize,
  level: usize,
}

impl<T: DisplaySyntaxTree + ?Sized> core::fmt::Display for SyntaxTreeDisplay<'_, T> {
  #[cfg_attr(not(tarpaulin), inline(always))]
  fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
    self.t.fmt(self.level, self.indent, f)
  }
}