readonly

Author: neverRare

dictionary/parser.ts

@@ -81,7 +81,7 @@ function template<T>(parser: Parser<T>): Parser<T> {
 const simpleUnit = memoize((kind: string) => word.skip(tag(keyword(kind))));
 function detectRepetition(
   source: ReadonlyArray<string>,
-): { before: string; repeat: string; after: string } {
+): Readonly<{ before: string; repeat: string; after: string }> {
   if (source.length === 1) {
     return { before: source[0], repeat: "", after: "" };
   }

src/parser/parser.ts

@@ -197,7 +197,7 @@ function binaryWords(
     } else if (!contentWordSet.has(words[1])) {
       throw new UnrecognizedError(`"${words[1]}" as content word`);
     } else {
-      return words as [string, string];
+      return words as readonly [bottom: string, top: string];
     }
   });
 }