From 1e4cab393e55df8875c6303ebb7bde8f09f911c9 Mon Sep 17 00:00:00 2001
From: Martin Haug <mhaug@live.de>
Date: Tue, 2 Nov 2021 12:06:22 +0100
Subject: Introduce incremental parsing

---
 src/parse/mod.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/parse/mod.rs')

diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index 10aaad23..1ab2fb15 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -25,6 +25,20 @@ pub fn parse(src: &str) -> Rc<GreenNode> {
     }
 }
 
+/// Parse a block. Returns `Some` if there was only one block.
+pub fn parse_block(source: &str) -> Option<Rc<GreenNode>> {
+    let mut p = Parser::new(source);
+    block(&mut p);
+    if p.eof() {
+        match p.finish().into_iter().next() {
+            Some(Green::Node(node)) => Some(node),
+            _ => unreachable!(),
+        }
+    } else {
+        None
+    }
+}
+
 /// Parse markup.
 fn markup(p: &mut Parser) {
     markup_while(p, true, &mut |_| true)
-- 
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