From e362e83b996f9ba914c88630bec28b703c535dcc Mon Sep 17 00:00:00 2001
From: Greg Brown <gmb60@cam.ac.uk>
Date: Thu, 19 Nov 2020 13:57:14 +0000
Subject: Switch parsing core to syn

---
 src/nibble/parse/mod.rs | 61 -------------------------------------------------
 1 file changed, 61 deletions(-)
 delete mode 100644 src/nibble/parse/mod.rs

(limited to 'src/nibble/parse/mod.rs')

diff --git a/src/nibble/parse/mod.rs b/src/nibble/parse/mod.rs
deleted file mode 100644
index 13c4c0e..0000000
--- a/src/nibble/parse/mod.rs
+++ /dev/null
@@ -1,61 +0,0 @@
-pub mod iter;
-
-use self::iter::Peek;
-use self::iter::PeekExt;
-
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-pub enum ParseError<E> {
-    EndOfFile,
-    InvalidCharacter(char),
-    Other(E),
-}
-
-impl<U> ParseError<U> {
-    pub fn map<T: Into<U>>(other: ParseError<T>) -> Self {
-        match other {
-            ParseError::EndOfFile => Self::EndOfFile,
-            ParseError::InvalidCharacter(c) => Self::InvalidCharacter(c),
-            ParseError::Other(t) => Self::Other(t.into())
-        }
-    }
-}
-
-/// Parse a value from an iterator.
-pub trait Parse: Sized {
-    /// The associated error that can be returned from parsing.
-    type Err;
-    /// Parses `iter` to return a value of this type.
-    ///
-    /// This method may not reach the end of `iter`. If so, it must not consume any
-    /// characters in the stream that do not form part of the value.
-    ///
-    /// If parsing succeeds, return the value inside [`Ok`]. Otherwise, when the
-    /// iterator is ill-formatted, return an error specific to the inside [`Err`].
-    /// The error type is specific to the implementation of the trait.
-    fn parse<I: PeekExt<Item = char>>(iter: I) -> Result<Self, ParseError<Self::Err>>;
-}
-
-/// Consumes the next item in `iter` if it equals `c`. Otherwise, returns an
-/// appropriate error without advancing the iterator.
-///
-/// # Examples
-/// Basic usage
-/// ```
-/// use chomp::nibble::parse::{requires, Parse, ParseError};
-/// use std::convert::Infallible;
-///
-/// let s = "hello".to_owned();
-/// let mut iter = s.chars().peekable();
-/// assert_eq!(requires::<_, Infallible>(&mut iter, 'h'), Ok(()));
-/// assert_eq!(requires::<_, Infallible>(&mut iter, 'e'), Ok(()));
-/// assert_eq!(requires::<_, Infallible>(&mut iter, 'z'), Err(ParseError::InvalidCharacter('l')));
-/// assert_eq!(iter.next(), Some('l'));
-/// assert_eq!(iter.next(), Some('l'));
-/// assert_eq!(iter.next(), Some('o'));
-/// assert_eq!(requires::<_, Infallible>(iter, '!'), Err(ParseError::EndOfFile));
-/// ```
-pub fn requires<I: Peek<Item = char>, E>(mut iter: I, c: char) -> Result<(), ParseError<E>> {
-    iter.next_if_eq(&c)
-        .ok_or(ParseError::EndOfFile)?
-        .map_err(|&c| ParseError::InvalidCharacter(c))
-}
-- 
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