Fix indexing errors

code/.vscode/launch.json

@@ -9,7 +9,7 @@
             "type": "extensionHost",
             "request": "launch",
             "runtimeExecutable": "${execPath}",
-            "args": ["--extensionDevelopmentPath=${workspaceRoot}" ],
+            "args": ["--extensionDevelopmentPath=${workspaceRoot}"],
             "stopOnEntry": false,
             "sourceMaps": true,
             "outFiles": [ "${workspaceRoot}/out/src/**/*.js" ],

code/src/main.ts

@@ -12,7 +12,6 @@ let uris = {
 
 export function activate(context: vscode.ExtensionContext) {
     let textDocumentContentProvider = new TextDocumentContentProvider()
-
     let dispose = (disposable) => {
         context.subscriptions.push(disposable);
     }
@@ -25,7 +24,6 @@ export function activate(context: vscode.ExtensionContext) {
         let emitter = textDocumentContentProvider.eventEmitter
         emitter.fire(uris.syntaxTree)
         let syntax = activeSyntax()
-        console.log(syntax.highlight());
         setHighlights(vscode.window.activeTextEditor, syntax.highlight())
     })
 
@@ -89,7 +87,10 @@ function documentToFile(disposables: vscode.Disposable[], onChange) {
     }
 
     function createFile(text: String) {
-        return new backend.RustFile(text)
+        console.time("parsing")
+        let res = new backend.RustFile(text);
+        console.timeEnd("parsing")
+        return res
     }
 
     vscode.workspace.onDidChangeTextDocument((event: vscode.TextDocumentChangeEvent) => {
@@ -159,7 +160,6 @@ function setHighlights(
     editor: vscode.TextEditor,
     highlihgs: Array<[number, number, string]>
 ) {
-    console.log("setHighlight");
     let byTag = {}
     for (let tag in decorations) {
         byTag[tag] = []

src/parser/grammar/expressions.rs

@@ -69,7 +69,7 @@ fn atom_expr(p: &mut Parser) -> Option<CompletedMarker> {
     match p.current() {
         L_PAREN => Some(tuple_expr(p)),
         _ => {
-            p.error("expected expression");
+            p.err_and_bump("expected expression");
             None
         }
     }

src/yellow/syntax.rs

@@ -109,7 +109,7 @@ impl<R: TreeRoot> SyntaxNode<R> {
         let red = self.red();
         let parent = self.parent()?;
         let next_sibling_idx = red.index_in_parent()? + 1;
-        if next_sibling_idx == red.n_children() {
+        if next_sibling_idx == parent.red().n_children() {
             return None;
         }
         Some(SyntaxNode {