Implemented string unicode escapes

ablescript/src/lexer.rs

@@ -138,7 +138,24 @@ fn get_value<T: std::str::FromStr>(lexer: &mut Lexer<Token>) -> Option<T> {
 
 fn get_string(lexer: &mut Lexer<Token>) -> Option<String> {
     lexer.bump(lexer.remainder().find("*/")?);
-    let string = lexer.slice()[2..].to_owned();
+
+    let mut string = String::new();
+    let mut slice = &lexer.slice()[2..];
+    while let Some(escape_start) = slice.find('"') {
+        string.push_str(&slice.get(..escape_start)?);
+        slice = &slice.get(escape_start + 1..)?;
+
+        let escape_end = slice.find('"')?;
+        string.push(
+            u32::from_str_radix(&slice.get(..escape_end)?, 12)
+                .ok()
+                .and_then(char::from_u32)?,
+        );
+
+        slice = &slice.get(escape_end + 1..)?;
+    }
+
+    string.push_str(&slice);
     lexer.bump(2);
 
     Some(string)