From 4806864e5377a5fef937b3fa02542e620c547969 Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Thu, 7 Jul 2022 17:21:38 +0200
Subject: Add basic support for block quotes

---
 src/util/skip.rs | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/util/skip.rs

(limited to 'src/util/skip.rs')

diff --git a/src/util/skip.rs b/src/util/skip.rs
new file mode 100644
index 0000000..2c4198a
--- /dev/null
+++ b/src/util/skip.rs
@@ -0,0 +1,44 @@
+use crate::tokenizer::{Event, TokenType};
+
+/// To do.
+pub fn opt(events: &[Event], index: usize, token_types: &[TokenType]) -> usize {
+    skip_opt_with_direction(events, index, token_types, true)
+}
+
+/// To do.
+pub fn opt_back(events: &[Event], index: usize, token_types: &[TokenType]) -> usize {
+    skip_opt_with_direction(events, index, token_types, false)
+}
+
+/// To do.
+fn skip_opt_with_direction(
+    events: &[Event],
+    index: usize,
+    token_types: &[TokenType],
+    forward: bool,
+) -> usize {
+    let mut index = index;
+
+    while index < events.len() {
+        let current = &events[index].token_type;
+
+        if !token_types.contains(current) {
+            break;
+        }
+
+        // assert_eq!(events[index].event_type, EventType::Enter);
+        index = if forward { index + 1 } else { index - 1 };
+
+        loop {
+            if events[index].token_type == *current {
+                // assert_eq!(events[index].event_type, EventType::Exit);
+                index = if forward { index + 1 } else { index - 1 };
+                break;
+            }
+
+            index = if forward { index + 1 } else { index - 1 };
+        }
+    }
+
+    index
+}
-- 
cgit