From 015369ad7a9c4a90873066b5f43a3ac12b1c7ea4 Mon Sep 17 00:00:00 2001
From: sleshep <9625413+sleshep@users.noreply.github.com>
Date: Thu, 7 Aug 2025 17:03:32 +0800
Subject: [PATCH] pattern: Support double quote escape

---
 src/proc-macros/pattern.rs | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/proc-macros/pattern.rs b/src/proc-macros/pattern.rs
index 4524668..ba34b46 100644
--- a/src/proc-macros/pattern.rs
+++ b/src/proc-macros/pattern.rs
@@ -493,12 +493,16 @@ fn parse_helper(pat: &mut &str, result: &mut Vec<Atom>) -> Result<(), PatError>
 			// Match raw bytes
 			b'"' => loop {
 				if let Some(chr) = iter.next().cloned() {
-					if chr != b'"' {
-						result.push(Atom::Byte(chr));
-					}
-					else {
+					if chr == b'"' {
+						// Handle escaped quotes `""`
+						if iter.as_slice().first() == Some(&b'"') {
+							iter.next();
+							result.push(Atom::Byte(b'"'));
+							continue;
+						}
 						break;
 					}
+					result.push(Atom::Byte(chr));
 				}
 				else {
 					return Err(PatError::UnclosedQuote);
@@ -641,6 +645,12 @@ mod tests {
 			Save(0), Byte(115), Byte(116), Byte(114), Byte(105), Byte(110), Byte(103)
 		]));
 
+		assert_eq!(parse("\"string\"\"quote\"\"string\""), Ok(vec![
+			Save(0), Byte(115), Byte(116), Byte(114), Byte(105), Byte(110), Byte(103),
+			Byte(34), Byte(113), Byte(117), Byte(111), Byte(116), Byte(101), Byte(34),
+			Byte(115), Byte(116), Byte(114), Byte(105), Byte(110), Byte(103)
+		]));
+
 		assert_eq!(parse("*{FF D8 42}"), Ok(vec![
 			Save(0), Push(PTR_SKIP), Ptr, Byte(0xFF), Byte(0xD8), Byte(0x42)
 		]));