Method parseAssignableExpression

src/core/kernel.js:140–154

(parser)

    }

    parseAssignableExpression(parser) {
        parser.matchToken("the"); // optional "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")) {