From d1d47e62445806a7ecfb747989d2cb34989d5d51 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sun, 28 Jan 2018 20:48:37 +0300
Subject: Skip over balanced parens

---
 src/parser/event_parser/grammar/items.rs |  5 +++++
 src/parser/event_parser/grammar/mod.rs   | 17 +++++++++++++++++
 2 files changed, 22 insertions(+)

(limited to 'src')

diff --git a/src/parser/event_parser/grammar/items.rs b/src/parser/event_parser/grammar/items.rs
index 309e4f4de..56e3208ac 100644
--- a/src/parser/event_parser/grammar/items.rs
+++ b/src/parser/event_parser/grammar/items.rs
@@ -36,6 +36,11 @@ fn item(p: &mut Parser) {
             fn_item(p);
             FN_ITEM
         }
+        L_CURLY => {
+            item.abandon(p);
+            error_block(p, "expected item");
+            return;
+        }
         err_token => {
             item.abandon(p);
             let message = if err_token == SEMI {
diff --git a/src/parser/event_parser/grammar/mod.rs b/src/parser/event_parser/grammar/mod.rs
index 92125acd1..e7f1915d2 100644
--- a/src/parser/event_parser/grammar/mod.rs
+++ b/src/parser/event_parser/grammar/mod.rs
@@ -49,6 +49,23 @@ fn alias(p: &mut Parser) -> bool {
     true //FIXME: return false if three are errors
 }
 
+fn error_block(p: &mut Parser, message: &str) {
+    assert!(p.at(L_CURLY));
+    let err = p.start();
+    p.error().message(message).emit();
+    p.bump();
+    let mut level: u32 = 1;
+    while level > 0 && !p.at(EOF) {
+        match p.current() {
+            L_CURLY => level += 1,
+            R_CURLY => level -= 1,
+            _ => (),
+        }
+        p.bump();
+    }
+    err.complete(p, ERROR);
+}
+
 impl<'p> Parser<'p> {
     fn at<L: Lookahead>(&self, l: L) -> bool {
         l.is_ahead(self)
-- 
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