Method parseAssignableExpression

www/js/_hyperscript.js:1446–1460

(parser)

      return parser.parseAnyOf(this.#topExpressions);
    }
    parseAssignableExpression(parser) {
      parser.matchToken("the");
      var expr = parser.parseElement("primaryExpression");
      var checkExpr = expr;
      while (checkExpr && checkExpr.type === "parenthesized") {
        checkExpr = checkExpr.expr;
      }
      if (checkExpr && this.#assignableExpressions.includes(checkExpr.type)) {
        return expr;
      } else {
        parser.raiseError(
          "A target expression must be writable.  The expression type '" + (checkExpr && checkExpr.type) + "' is not."
        );
      }
    }
    parseIndirectStatement(parser, root) {
      if (parser.matchToken("unless")) {
        root.endToken = parser.lastMatch();