parser: validate more string types (#1132)

Author: sbdchd

crates/squawk_parser/src/grammar.rs

@@ -35,15 +35,15 @@ fn literal(p: &mut Parser<'_>) -> Option<CompletedMarker> {
         return None;
     }
     let m = p.start();
+    // E021-03 string continuation syntax
+    // If two string literals are next to each other, and don't have a comment
+    // between them, then they are automatically combined.
     if p.eat(UNICODE_ESC_STRING) {
+        while !p.at(EOF) && p.eat(STRING) {}
         if p.eat(UESCAPE_KW) {
             p.expect(STRING);
         }
-    }
-    // E021-03 string continuation syntax
-    // If two string literals are next to each other, and don't have a comment
-    // between them, then they are automatically combined.
-    else if p.eat(STRING) {
+    } else if p.eat(STRING) || p.eat(ESC_STRING) || p.eat(BIT_STRING) || p.eat(BYTE_STRING) {
         while !p.at(EOF) && p.eat(STRING) {}
     } else {
         p.bump_any();