1 files changed, 0 insertions, 194 deletions

diff --git a/crates/libsyntax2/src/parser_impl/mod.rs b/crates/libsyntax2/src/parser_impl/mod.rs
deleted file mode 100644
index b343b404f..000000000
--- a/crates/libsyntax2/src/parser_impl/mod.rs
+++ /dev/null
@@ -1,194 +0,0 @@
-mod event;
-mod input;
-
-use std::cell::Cell;
-
-use {
-    lexer::Token,
-    parser_api::Parser,
-    parser_impl::{
-        event::{process, Event},
-        input::{InputPosition, ParserInput},
-    },
-    TextUnit,
-};
-
-use SyntaxKind::{self, EOF, TOMBSTONE};
-
-pub(crate) trait Sink<'a> {
-    type Tree;
-
-    fn new(text: &'a str) -> Self;
-
-    fn leaf(&mut self, kind: SyntaxKind, len: TextUnit);
-    fn start_internal(&mut self, kind: SyntaxKind);
-    fn finish_internal(&mut self);
-    fn error(&mut self, err: String);
-    fn finish(self) -> Self::Tree;
-}
-
-/// Parse a sequence of tokens into the representative node tree
-pub(crate) fn parse_with<'a, S: Sink<'a>>(
-    text: &'a str,
-    tokens: &[Token],
-    parser: fn(&mut Parser),
-) -> S::Tree {
-    let events = {
-        let input = input::ParserInput::new(text, tokens);
-        let parser_impl = ParserImpl::new(&input);
-        let mut parser_api = Parser(parser_impl);
-        parser(&mut parser_api);
-        parser_api.0.into_events()
-    };
-    let mut sink = S::new(text);
-    process(&mut sink, tokens, events);
-    sink.finish()
-}
-
-/// Implementation details of `Parser`, extracted
-/// to a separate struct in order not to pollute
-/// the public API of the `Parser`.
-pub(crate) struct ParserImpl<'t> {
-    inp: &'t ParserInput<'t>,
-
-    pos: InputPosition,
-    events: Vec<Event>,
-    steps: Cell<u32>,
-}
-
-impl<'t> ParserImpl<'t> {
-    pub(crate) fn new(inp: &'t ParserInput<'t>) -> ParserImpl<'t> {
-        ParserImpl {
-            inp,
-
-            pos: InputPosition::new(),
-            events: Vec::new(),
-            steps: Cell::new(0),
-        }
-    }
-
-    pub(crate) fn into_events(self) -> Vec<Event> {
-        assert_eq!(self.nth(0), EOF);
-        self.events
-    }
-
-    pub(super) fn next2(&self) -> Option<(SyntaxKind, SyntaxKind)> {
-        let c1 = self.inp.kind(self.pos);
-        let c2 = self.inp.kind(self.pos + 1);
-        if self.inp.start(self.pos + 1) == self.inp.start(self.pos) + self.inp.len(self.pos) {
-            Some((c1, c2))
-        } else {
-            None
-        }
-    }
-
-    pub(super) fn next3(&self) -> Option<(SyntaxKind, SyntaxKind, SyntaxKind)> {
-        let c1 = self.inp.kind(self.pos);
-        let c2 = self.inp.kind(self.pos + 1);
-        let c3 = self.inp.kind(self.pos + 2);
-        if self.inp.start(self.pos + 1) == self.inp.start(self.pos) + self.inp.len(self.pos)
-           && self.inp.start(self.pos + 2) == self.inp.start(self.pos + 1) + self.inp.len(self.pos + 1){
-            Some((c1, c2, c3))
-        } else {
-            None
-        }
-    }
-
-    pub(super) fn nth(&self, n: u32) -> SyntaxKind {
-        let steps = self.steps.get();
-        if steps > 10_000_000 {
-            panic!("the parser seems stuck");
-        }
-        self.steps.set(steps + 1);
-
-        self.inp.kind(self.pos + n)
-    }
-
-    pub(super) fn at_kw(&self, t: &str) -> bool {
-        self.inp.text(self.pos) == t
-    }
-
-    pub(super) fn start(&mut self) -> u32 {
-        let pos = self.events.len() as u32;
-        self.event(Event::Start {
-            kind: TOMBSTONE,
-            forward_parent: None,
-        });
-        pos
-    }
-
-    pub(super) fn bump(&mut self) {
-        let kind = self.nth(0);
-        if kind == EOF {
-            return;
-        }
-        self.do_bump(kind, 1);
-    }
-
-    pub(super) fn bump_remap(&mut self, kind: SyntaxKind) {
-        if self.nth(0) == EOF {
-            // TODO: panic!?
-            return;
-        }
-        self.do_bump(kind, 1);
-    }
-
-    pub(super) fn bump_compound(&mut self, kind: SyntaxKind, n: u8) {
-        self.do_bump(kind, n);
-    }
-
-    fn do_bump(&mut self, kind: SyntaxKind, n_raw_tokens: u8) {
-        self.pos += u32::from(n_raw_tokens);
-        self.event(Event::Token {
-            kind,
-            n_raw_tokens,
-        });
-    }
-
-    pub(super) fn error(&mut self, msg: String) {
-        self.event(Event::Error { msg })
-    }
-
-    pub(super) fn complete(&mut self, pos: u32, kind: SyntaxKind) {
-        match self.events[pos as usize] {
-            Event::Start {
-                kind: ref mut slot, ..
-            } => {
-                *slot = kind;
-            }
-            _ => unreachable!(),
-        }
-        self.event(Event::Finish);
-    }
-
-    pub(super) fn abandon(&mut self, pos: u32) {
-        let idx = pos as usize;
-        if idx == self.events.len() - 1 {
-            match self.events.pop() {
-                Some(Event::Start {
-                    kind: TOMBSTONE,
-                    forward_parent: None,
-                }) => (),
-                _ => unreachable!(),
-            }
-        }
-    }
-
-    pub(super) fn precede(&mut self, pos: u32) -> u32 {
-        let new_pos = self.start();
-        match self.events[pos as usize] {
-            Event::Start {
-                ref mut forward_parent,
-                ..
-            } => {
-                *forward_parent = Some(new_pos - pos);
-            }
-            _ => unreachable!(),
-        }
-        new_pos
-    }
-
-    fn event(&mut self, event: Event) {
-        self.events.push(event)
-    }
-}