Function throwError

docs/app/js/sanddance-app.js:144076–144085

(token, messageFormat)

    return node;
} // Throw an exception
function throwError(token, messageFormat) {
    var error, args = Array.prototype.slice.call(arguments, 2), msg = messageFormat.replace(/%(\d)/g, (whole, index1)=>{
        assert(index1 < args.length, "Message reference must be in range");
        return args[index1];
    });
    error = new Error(msg);
    error.index = index;
    error.description = msg;
    throw error;
} // Throw an exception because of the token.
function throwUnexpected(token) {
    if (token.type === TokenEOF) throwError(token, MessageUnexpectedEOS);
    if (token.type === TokenNumericLiteral) throwError(token, MessageUnexpectedNumber);