3 files changed, 19 insertions, 17 deletions

diff --git a/crates/libsyntax2/src/lib.rs b/crates/libsyntax2/src/lib.rs
index ab4a40435..01e155855 100644
--- a/crates/libsyntax2/src/lib.rs
+++ b/crates/libsyntax2/src/lib.rs
@@ -50,16 +50,25 @@ pub use {
     yellow::{SyntaxNode, SyntaxNodeRef, OwnedRoot, RefRoot, TreeRoot, SyntaxError},
 };
 
+use yellow::{GreenNode, SyntaxRoot};
+
 #[derive(Clone, Debug)]
 pub struct File {
     root: SyntaxNode
 }
 
 impl File {
-    pub fn parse(text: &str) -> Self {
-        let root = ::parse(text);
+    fn new(root: GreenNode, errors: Vec<SyntaxError>) -> File {
+        let root = SyntaxRoot::new(root, errors);
+        let root = SyntaxNode::new_owned(root);
+        validate_block_structure(root.borrowed());
         File { root }
     }
+    pub fn parse(text: &str) -> Self {
+        let tokens = tokenize(&text);
+        let (root, errors) = parser_impl::parse::<yellow::GreenBuilder>(text, &tokens);
+        File::new(root, errors)
+    }
     pub fn ast(&self) -> ast::Root {
         ast::Root::cast(self.syntax()).unwrap()
     }
@@ -69,14 +78,6 @@ impl File {
     pub fn errors(&self) -> Vec<SyntaxError> {
         self.syntax().root.syntax_root().errors.clone()
     }
-
-}
-
-pub fn parse(text: &str) -> SyntaxNode {
-    let tokens = tokenize(&text);
-    let res = parser_impl::parse::<yellow::GreenBuilder>(text, &tokens);
-    validate_block_structure(res.borrowed());
-    res
 }
 
 #[cfg(not(debug_assertions))]
diff --git a/crates/libsyntax2/src/yellow/builder.rs b/crates/libsyntax2/src/yellow/builder.rs
index 5e94e5055..e4ab37899 100644
--- a/crates/libsyntax2/src/yellow/builder.rs
+++ b/crates/libsyntax2/src/yellow/builder.rs
@@ -1,6 +1,6 @@
 use {
     parser_impl::Sink,
-    yellow::{GreenNode, SyntaxError, SyntaxNode, SyntaxRoot},
+    yellow::{GreenNode, SyntaxError},
     SyntaxKind, TextRange, TextUnit,
 };
 
@@ -13,7 +13,7 @@ pub(crate) struct GreenBuilder<'a> {
 }
 
 impl<'a> Sink<'a> for GreenBuilder<'a> {
-    type Tree = SyntaxNode;
+    type Tree = (GreenNode, Vec<SyntaxError>);
 
     fn new(text: &'a str) -> Self {
         GreenBuilder {
@@ -56,10 +56,9 @@ impl<'a> Sink<'a> for GreenBuilder<'a> {
         })
     }
 
-    fn finish(mut self) -> SyntaxNode {
+    fn finish(mut self) -> (GreenNode, Vec<SyntaxError>) {
         assert_eq!(self.children.len(), 1);
         let root = self.children.pop().unwrap();
-        let root = SyntaxRoot::new(root, self.errors);
-        SyntaxNode::new_owned(root)
+        (root, self.errors)
     }
 }
diff --git a/crates/libsyntax2/tests/test/main.rs b/crates/libsyntax2/tests/test/main.rs
index 7e5dc32d9..18c711aee 100644
--- a/crates/libsyntax2/tests/test/main.rs
+++ b/crates/libsyntax2/tests/test/main.rs
@@ -9,6 +9,8 @@ use std::{
     fmt::Write,
 };
 
+use libsyntax2::File;
+
 #[test]
 fn lexer_tests() {
     dir_tests(&["lexer"], |text| {
@@ -20,8 +22,8 @@ fn lexer_tests() {
 #[test]
 fn parser_tests() {
     dir_tests(&["parser/inline", "parser/ok", "parser/err"], |text| {
-        let file = libsyntax2::parse(text);
-        libsyntax2::utils::dump_tree(file.borrowed())
+        let file = File::parse(text);
+        libsyntax2::utils::dump_tree(file.syntax())
     })
 }