Merge tag 'debian/1.52.1+dfsg1-1_exp2' into proxmox/buster

[rustc.git] / vendor / rustc-ap-rustc_lexer / src / cursor.rs

diff --git a/vendor/rustc-ap-rustc_lexer/src/cursor.rs b/vendor/rustc-ap-rustc_lexer/src/cursor.rs
deleted file mode 100644 (file)
index 297f3d1..0000000
--- a/vendor/rustc-ap-rustc_lexer/src/cursor.rs
+++ /dev/null
@@ -1,84 +0,0 @@
-use std::str::Chars;
-
-/// Peekable iterator over a char sequence.
-///
-/// Next characters can be peeked via `nth_char` method,
-/// and position can be shifted forward via `bump` method.
-pub(crate) struct Cursor<'a> {
-    initial_len: usize,
-    chars: Chars<'a>,
-    #[cfg(debug_assertions)]
-    prev: char,
-}
-
-pub(crate) const EOF_CHAR: char = '\0';
-
-impl<'a> Cursor<'a> {
-    pub(crate) fn new(input: &'a str) -> Cursor<'a> {
-        Cursor {
-            initial_len: input.len(),
-            chars: input.chars(),
-            #[cfg(debug_assertions)]
-            prev: EOF_CHAR,
-        }
-    }
-
-    /// Returns the last eaten symbol (or `'\0'` in release builds).
-    /// (For debug assertions only.)
-    pub(crate) fn prev(&self) -> char {
-        #[cfg(debug_assertions)]
-        {
-            self.prev
-        }
-
-        #[cfg(not(debug_assertions))]
-        {
-            EOF_CHAR
-        }
-    }
-
-    /// Returns nth character relative to the current cursor position.
-    /// If requested position doesn't exist, `EOF_CHAR` is returned.
-    /// However, getting `EOF_CHAR` doesn't always mean actual end of file,
-    /// it should be checked with `is_eof` method.
-    fn nth_char(&self, n: usize) -> char {
-        self.chars().nth(n).unwrap_or(EOF_CHAR)
-    }
-
-    /// Peeks the next symbol from the input stream without consuming it.
-    pub(crate) fn first(&self) -> char {
-        self.nth_char(0)
-    }
-
-    /// Peeks the second symbol from the input stream without consuming it.
-    pub(crate) fn second(&self) -> char {
-        self.nth_char(1)
-    }
-
-    /// Checks if there is nothing more to consume.
-    pub(crate) fn is_eof(&self) -> bool {
-        self.chars.as_str().is_empty()
-    }
-
-    /// Returns amount of already consumed symbols.
-    pub(crate) fn len_consumed(&self) -> usize {
-        self.initial_len - self.chars.as_str().len()
-    }
-
-    /// Returns a `Chars` iterator over the remaining characters.
-    fn chars(&self) -> Chars<'a> {
-        self.chars.clone()
-    }
-
-    /// Moves to the next character.
-    pub(crate) fn bump(&mut self) -> Option<char> {
-        let c = self.chars.next()?;
-
-        #[cfg(debug_assertions)]
-        {
-            self.prev = c;
-        }
-
-        Some(c)
-    }
-}