From f7f97271467a1f9be1b6a35f9026d134f3caf63e Mon Sep 17 00:00:00 2001
From: RunasSudo <runassudo@yingtongli.me>
Date: Sun, 20 Nov 2022 18:57:30 +1100
Subject: [PATCH] Allow escaped quotation marks in BLT parser

---
 src/parser/blt.rs | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/parser/blt.rs b/src/parser/blt.rs
index e01018f..f438879 100644
--- a/src/parser/blt.rs
+++ b/src/parser/blt.rs
@@ -255,9 +255,27 @@ impl<N: Number, I: Iterator<Item=char>> BLTParser<N, I> {
 		if self.lookahead() == '"' {
 			self.accept(); // Opening quotation mark
 			let mut result = String::new();
+			
+			loop {
+				// Read string contents
+				if self.lookahead() == '"' {
+					break;
+				} else if self.lookahead() == '\\' {
+					// Escape sequence
+					self.accept();
+					if self.lookahead() == '"' || self.lookahead() == '\\' {
+						result.push(self.accept());
+					} else {
+						return Err(ParseError::Unexpected(self.line_no, self.col_no, self.lookahead()));
+					}
+				} else {
+					result.push(self.accept());
+				}
+			}
+			
 			while self.lookahead() != '"' {
 				// TODO: BufRead::read_until ?
-				result.push(self.accept());
+				
 			}
 			self.accept(); // Closing quotation mark
 			if !self.eof() {