kill old tree

9 files changed, 15 insertions, 438 deletions

diff --git a/src/lib.rs b/src/lib.rs
index cf2e97024..619ad62e5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -26,53 +26,22 @@ mod yellow;
 
 pub mod syntax_kinds;
 pub use text_unit::{TextRange, TextUnit};
-pub use tree::{File, Node, SyntaxKind, Token};
-pub(crate) use tree::{ErrorMsg, FileBuilder, Sink, GreenBuilder};
+pub use tree::{SyntaxKind, Token};
+pub(crate) use tree::{Sink, GreenBuilder};
 pub use lexer::{next_token, tokenize};
 pub use yellow::SyntaxNode;
 pub(crate) use yellow::SError;
-pub use parser::{parse, parse_green};
+pub use parser::{parse_green};
 
 /// Utilities for simple uses of the parser.
 pub mod utils {
     use std::fmt::Write;
 
-    use {File, Node, SyntaxNode};
+    use {SyntaxNode};
     use std::collections::BTreeSet;
     use SError;
 
     /// Parse a file and create a string representation of the resulting parse tree.
-    pub fn dump_tree(file: &File) -> String {
-        let mut result = String::new();
-        go(file.root(), &mut result, 0);
-        return result;
-
-        fn go(node: Node, buff: &mut String, level: usize) {
-            buff.push_str(&String::from("  ").repeat(level));
-            write!(buff, "{:?}\n", node).unwrap();
-            let my_errors = node.errors().filter(|e| e.after_child().is_none());
-            let parent_errors = node.parent()
-                .into_iter()
-                .flat_map(|n| n.errors())
-                .filter(|e| e.after_child() == Some(node));
-
-            for err in my_errors {
-                buff.push_str(&String::from("  ").repeat(level));
-                write!(buff, "err: `{}`\n", err.message()).unwrap();
-            }
-
-            for child in node.children() {
-                go(child, buff, level + 1)
-            }
-
-            for err in parent_errors {
-                buff.push_str(&String::from("  ").repeat(level));
-                write!(buff, "err: `{}`\n", err.message()).unwrap();
-            }
-        }
-    }
-
-    /// Parse a file and create a string representation of the resulting parse tree.
     pub fn dump_tree_green(syntax: &SyntaxNode) -> String {
         let mut errors: BTreeSet<_> = syntax.root.errors.iter().cloned().collect();
         let mut result = String::new();
@@ -82,12 +51,6 @@ pub mod utils {
         fn go(node: &SyntaxNode, buff: &mut String, level: usize, errors: &mut BTreeSet<SError>) {
             buff.push_str(&String::from("  ").repeat(level));
             write!(buff, "{:?}\n", node).unwrap();
-//            let my_errors = node.errors().filter(|e| e.after_child().is_none());
-//            let parent_errors = node.parent()
-//                .into_iter()
-//                .flat_map(|n| n.errors())
-//                .filter(|e| e.after_child() == Some(node));
-//
             let my_errors: Vec<_> = errors.iter().filter(|e| e.offset == node.range().start())
                 .cloned().collect();
             for err in my_errors {
diff --git a/src/parser/event.rs b/src/parser/event.rs
index 0fbfaeb9f..83039c664 100644
--- a/src/parser/event.rs
+++ b/src/parser/event.rs
@@ -1,5 +1,5 @@
 use {
-    ErrorMsg, File, FileBuilder, Sink, SyntaxKind, Token, GreenBuilder,
+    Sink, SyntaxKind, Token,
     syntax_kinds::TOMBSTONE,
 };
 use super::is_insignificant;
@@ -67,12 +67,6 @@ pub(crate) enum Event {
     },
 }
 
-pub(super) fn to_file(text: String, tokens: &[Token], events: Vec<Event>) -> File {
-    let mut builder = FileBuilder::new(text);
-    process(&mut builder, tokens, events);
-    builder.finish()
-}
-
 pub(super) fn process(builder: &mut Sink, tokens: &[Token], events: Vec<Event>) {
     let mut idx = 0;
 
@@ -147,7 +141,7 @@ pub(super) fn process(builder: &mut Sink, tokens: &[Token], events: Vec<Event>)
                 }
                 builder.leaf(kind, len);
             }
-            &Event::Error { ref msg } => builder.error(ErrorMsg { msg: msg.clone() }),
+            &Event::Error { ref msg } => builder.error(msg.clone()),
         }
     }
 }
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 26fbb6e3d..b7d5e5832 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -7,7 +7,7 @@ mod grammar;
 
 use std::sync::Arc;
 use {
-    File, SyntaxKind, Token,
+    Token,
     yellow::SyntaxNode,
     syntax_kinds::*
 };
@@ -16,18 +16,6 @@ use parser::event::process;
 
 
 /// Parse a sequence of tokens into the representative node tree
-pub fn parse(text: String, tokens: &[Token]) -> File {
-    let events = {
-        let input = input::ParserInput::new(&text, tokens);
-        let parser_impl = parser::imp::ParserImpl::new(&input);
-        let mut parser = parser::Parser(parser_impl);
-        grammar::file(&mut parser);
-        parser.0.into_events()
-    };
-    event::to_file(text, tokens, events)
-}
-
-/// Parse a sequence of tokens into the representative node tree
 pub fn parse_green(text: String, tokens: &[Token]) -> SyntaxNode {
     let events = {
         let input = input::ParserInput::new(&text, tokens);
diff --git a/src/tree/file_builder.rs b/src/tree/file_builder.rs
index 4983006cd..f5d1751f9 100644
--- a/src/tree/file_builder.rs
+++ b/src/tree/file_builder.rs
@@ -12,157 +12,13 @@ use {
     SyntaxKind, TextRange, TextUnit,
     yellow::GreenNode
 };
-use super::{File, NodeData, NodeIdx, SyntaxErrorData};
 use SError;
 
 pub(crate) trait Sink {
     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: ErrorMsg);
-}
-
-#[derive(Debug)]
-pub(crate) struct FileBuilder {
-    text: String,
-    nodes: Vec<NodeData>,
-    errors: Vec<SyntaxErrorData>,
-    in_progress: Vec<(NodeIdx, Option<NodeIdx>)>,
-    // (parent, last_child)
-    pos: TextUnit,
-}
-
-impl Sink for FileBuilder {
-    fn leaf(&mut self, kind: SyntaxKind, len: TextUnit) {
-        let leaf = NodeData {
-            kind,
-            range: TextRange::offset_len(self.pos, len),
-            parent: None,
-            first_child: None,
-            next_sibling: None,
-        };
-        self.pos += len;
-        let id = self.push_child(leaf);
-        self.add_len(id);
-    }
-
-    fn start_internal(&mut self, kind: SyntaxKind) {
-        let node = NodeData {
-            kind,
-            range: TextRange::offset_len(self.pos, 0.into()),
-            parent: None,
-            first_child: None,
-            next_sibling: None,
-        };
-        let id = if self.in_progress.is_empty() {
-            self.new_node(node)
-        } else {
-            self.push_child(node)
-        };
-        self.in_progress.push((id, None))
-    }
-
-    fn finish_internal(&mut self) {
-        let (id, _) = self.in_progress
-            .pop()
-            .expect("trying to complete a node, but there are no in-progress nodes");
-        if !self.in_progress.is_empty() {
-            self.add_len(id);
-        }
-    }
-
-    fn error(&mut self, err: ErrorMsg) {
-        let &(node, after_child) = self.in_progress.last().unwrap();
-        self.errors.push(SyntaxErrorData {
-            node,
-            message: err.msg,
-            after_child,
-        })
-    }
-}
-
-impl FileBuilder {
-    pub fn new(text: String) -> FileBuilder {
-        FileBuilder {
-            text,
-            nodes: Vec::new(),
-            errors: Vec::new(),
-            in_progress: Vec::new(),
-            pos: 0.into(),
-        }
-    }
-
-    pub fn finish(self) -> File {
-        assert!(
-            self.in_progress.is_empty(),
-            "some nodes in FileBuilder are unfinished: {:?}",
-            self.in_progress
-                .iter()
-                .map(|&(idx, _)| self.nodes[idx].kind)
-                .collect::<Vec<_>>()
-        );
-        assert_eq!(
-            self.pos,
-            (self.text.len() as u32).into(),
-            "nodes in FileBuilder do not cover the whole file"
-        );
-        File {
-            text: self.text,
-            nodes: self.nodes,
-            errors: self.errors,
-        }
-    }
-
-    fn new_node(&mut self, data: NodeData) -> NodeIdx {
-        let id = NodeIdx(self.nodes.len() as u32);
-        self.nodes.push(data);
-        id
-    }
-
-    fn push_child(&mut self, mut child: NodeData) -> NodeIdx {
-        child.parent = Some(self.current_id());
-        let id = self.new_node(child);
-        {
-            let (parent, sibling) = *self.in_progress.last().unwrap();
-            let slot = if let Some(idx) = sibling {
-                &mut self.nodes[idx].next_sibling
-            } else {
-                &mut self.nodes[parent].first_child
-            };
-            fill(slot, id);
-        }
-        self.in_progress.last_mut().unwrap().1 = Some(id);
-        id
-    }
-
-    fn add_len(&mut self, child: NodeIdx) {
-        let range = self.nodes[child].range;
-        grow(&mut self.current_parent().range, range);
-    }
-
-    fn current_id(&self) -> NodeIdx {
-        self.in_progress.last().unwrap().0
-    }
-
-    fn current_parent(&mut self) -> &mut NodeData {
-        let idx = self.current_id();
-        &mut self.nodes[idx]
-    }
-}
-
-fn fill<T>(slot: &mut Option<T>, value: T) {
-    assert!(slot.is_none());
-    *slot = Some(value);
-}
-
-fn grow(left: &mut TextRange, right: TextRange) {
-    assert_eq!(left.end(), right.start());
-    *left = TextRange::from_to(left.start(), right.end())
-}
-
-#[derive(Default)]
-pub(crate) struct ErrorMsg {
-    pub(crate) msg: String,
+    fn error(&mut self, err: String);
 }
 
 pub(crate) struct GreenBuilder {
@@ -216,8 +72,8 @@ impl Sink for GreenBuilder {
         }
     }
 
-    fn error(&mut self, err: ErrorMsg) {
-        self.errors.push(SError { message: err.msg, offset: self.pos })
+    fn error(&mut self, message: String) {
+        self.errors.push(SError { message, offset: self.pos })
     }
 }
 impl SyntaxKind {
diff --git a/src/tree/mod.rs b/src/tree/mod.rs
index 7abe17592..efba82825 100644
--- a/src/tree/mod.rs
+++ b/src/tree/mod.rs
@@ -1,8 +1,8 @@
 mod file_builder;
 
-use ::{TextRange, TextUnit};
-use std::{fmt, cmp};
-pub(crate) use self::file_builder::{ErrorMsg, FileBuilder, Sink, GreenBuilder};
+use ::{TextUnit};
+use std::{fmt};
+pub(crate) use self::file_builder::{Sink, GreenBuilder};
 
 pub use syntax_kinds::SyntaxKind;
 
@@ -25,218 +25,3 @@ pub struct Token {
     /// The length of the token.
     pub len: TextUnit,
 }
-
-/// The contents of a Rust source file.
-#[derive(Debug)]
-pub struct File {
-    text: String,
-    nodes: Vec<NodeData>,
-    errors: Vec<SyntaxErrorData>,
-}
-
-impl File {
-    /// The root node of this source file.
-    pub fn root<'f>(&'f self) -> Node<'f> {
-        assert!(!self.nodes.is_empty());
-        Node {
-            file: self,
-            idx: NodeIdx(0),
-        }
-    }
-}
-
-/// A reference to a token in a Rust source file.
-#[derive(Clone, Copy)]
-pub struct Node<'f> {
-    file: &'f File,
-    idx: NodeIdx,
-}
-
-impl<'f> Node<'f> {
-    /// The kind of the token at this node.
-    pub fn kind(&self) -> SyntaxKind {
-        self.data().kind
-    }
-
-    /// The text range covered by the token at this node.
-    pub fn range(&self) -> TextRange {
-        self.data().range
-    }
-
-    /// The text at this node.
-    pub fn text(&self) -> &'f str {
-        &self.file.text.as_str()[self.range()]
-    }
-
-    /// The parent node to this node.
-    pub fn parent(&self) -> Option<Node<'f>> {
-        self.as_node(self.data().parent)
-    }
-
-    /// The children nodes of this node.
-    pub fn children(&self) -> Children<'f> {
-        Children {
-            next: self.as_node(self.data().first_child),
-        }
-    }
-
-    /// Any errors contained in this node.
-    pub fn errors(&self) -> SyntaxErrors<'f> {
-        let pos = self.file.errors.iter().position(|e| e.node == self.idx);
-        let next = pos.map(|i| ErrorIdx(i as u32)).map(|idx| SyntaxError {
-            file: self.file,
-            idx,
-        });
-        SyntaxErrors { next }
-    }
-
-    fn data(&self) -> &'f NodeData {
-        &self.file.nodes[self.idx]
-    }
-
-    fn as_node(&self, idx: Option<NodeIdx>) -> Option<Node<'f>> {
-        idx.map(|idx| Node {
-            file: self.file,
-            idx,
-        })
-    }
-}
-
-impl<'f> fmt::Debug for Node<'f> {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        write!(fmt, "{:?}@{:?}", self.kind(), self.range())?;
-        if has_short_text(self.kind()) {
-            write!(fmt, " \"{}\"", self.text())?;
-        }
-        Ok(())
-    }
-}
-
-fn has_short_text(kind: SyntaxKind) -> bool {
-    use syntax_kinds::*;
-    match kind {
-        IDENT | LIFETIME => true,
-        _ => false,
-    }
-}
-
-impl<'f> cmp::PartialEq<Node<'f>> for Node<'f> {
-    fn eq(&self, other: &Node<'f>) -> bool {
-        self.idx == other.idx && ::std::ptr::eq(self.file, other.file)
-    }
-}
-
-impl<'f> cmp::Eq for Node<'f> {}
-
-#[derive(Clone, Copy, Debug)]
-pub struct SyntaxError<'f> {
-    file: &'f File,
-    idx: ErrorIdx,
-}
-
-impl<'f> SyntaxError<'f> {
-    pub fn message(&self) -> &'f str {
-        self.data().message.as_str()
-    }
-
-    pub fn after_child(&self) -> Option<Node<'f>> {
-        let idx = self.data().after_child?;
-        Some(Node {
-            file: self.file,
-            idx,
-        })
-    }
-
-    fn data(&self) -> &'f SyntaxErrorData {
-        &self.file.errors[self.idx]
-    }
-
-    fn next(&self) -> Option<SyntaxError<'f>> {
-        let next_idx = self.idx.0 + 1;
-        if !((next_idx as usize) < self.file.errors.len()) {
-            return None;
-        }
-        let result = SyntaxError {
-            file: self.file,
-            idx: ErrorIdx(next_idx),
-        };
-        if result.data().node != self.data().node {
-            return None;
-        }
-        Some(result)
-    }
-}
-
-#[derive(Debug)]
-pub struct Children<'f> {
-    next: Option<Node<'f>>,
-}
-
-impl<'f> Iterator for Children<'f> {
-    type Item = Node<'f>;
-
-    fn next(&mut self) -> Option<Node<'f>> {
-        let next = self.next;
-        self.next = next.and_then(|node| node.as_node(node.data().next_sibling));
-        next
-    }
-}
-
-#[derive(Debug)]
-pub struct SyntaxErrors<'f> {
-    next: Option<SyntaxError<'f>>,
-}
-
-impl<'f> Iterator for SyntaxErrors<'f> {
-    type Item = SyntaxError<'f>;
-
-    fn next(&mut self) -> Option<SyntaxError<'f>> {
-        let next = self.next;
-        self.next = next.as_ref().and_then(SyntaxError::next);
-        next
-    }
-}
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-struct NodeIdx(u32);
-
-#[derive(Debug)]
-struct NodeData {
-    kind: SyntaxKind,
-    range: TextRange,
-    parent: Option<NodeIdx>,
-    first_child: Option<NodeIdx>,
-    next_sibling: Option<NodeIdx>,
-}
-
-impl ::std::ops::Index<NodeIdx> for Vec<NodeData> {
-    type Output = NodeData;
-
-    fn index(&self, NodeIdx(idx): NodeIdx) -> &NodeData {
-        &self[idx as usize]
-    }
-}
-
-impl ::std::ops::IndexMut<NodeIdx> for Vec<NodeData> {
-    fn index_mut(&mut self, NodeIdx(idx): NodeIdx) -> &mut NodeData {
-        &mut self[idx as usize]
-    }
-}
-
-#[derive(Clone, Copy, Debug)]
-struct ErrorIdx(u32);
-
-#[derive(Debug)]
-struct SyntaxErrorData {
-    node: NodeIdx,
-    message: String,
-    after_child: Option<NodeIdx>,
-}
-
-impl ::std::ops::Index<ErrorIdx> for Vec<SyntaxErrorData> {
-    type Output = SyntaxErrorData;
-
-    fn index(&self, ErrorIdx(idx): ErrorIdx) -> &SyntaxErrorData {
-        &self[idx as usize]
-    }
-}
diff --git a/src/yellow/green.rs b/src/yellow/green.rs
index ede23b719..dafe1bb22 100644
--- a/src/yellow/green.rs
+++ b/src/yellow/green.rs
@@ -116,13 +116,6 @@ impl GreenNode {
             GreenNodeData::Branch(_) => false
         }
     }
-
-    pub(crate) fn leaf_text(&self) -> &str {
-        match &self.data {
-            GreenNodeData::Leaf(l) => l.text.as_str(),
-            GreenNodeData::Branch(_) => panic!("not a leaf")
-        }
-    }
 }
 
 #[derive(Debug)]
diff --git a/src/yellow/mod.rs b/src/yellow/mod.rs
index 236328a7f..88d88e226 100644
--- a/src/yellow/mod.rs
+++ b/src/yellow/mod.rs
@@ -4,7 +4,6 @@ mod syntax;
 
 use std::{
     sync::{Arc, Weak},
-    ops::Deref,
     mem
 };
 pub(crate) use self::{
diff --git a/src/yellow/red.rs b/src/yellow/red.rs
index feba99faa..71212a081 100644
--- a/src/yellow/red.rs
+++ b/src/yellow/red.rs
@@ -1,6 +1,6 @@
-use std::sync::{Arc, Weak, RwLock};
+use std::sync::{Arc, RwLock};
 use {
-    TextUnit, SyntaxKind, TextRange,
+    TextUnit,
     yellow::{Ptr, GreenNode, TextLen}
 };
 
diff --git a/src/yellow/syntax.rs b/src/yellow/syntax.rs
index 0c9ffeb14..7b1a05cd9 100644
--- a/src/yellow/syntax.rs
+++ b/src/yellow/syntax.rs
@@ -7,7 +7,6 @@ use {
     TextRange, TextUnit, SyntaxKind,
     yellow::{Ptr, RedNode, GreenNode, TextLen},
 };
-use yellow::green::GreenTrivia;
 
 #[derive(Clone)]
 pub struct SyntaxNode {