Function getReplacedValueOrUndefined

lib/tools/json5.js:525–546

(holder, key, isTopLevel)

        throw new Error('Replacer must be a function or an array');
    }
    var getReplacedValueOrUndefined = function(holder, key, isTopLevel) {
        var value = holder[key];

        // Replace the value with its toJSON value first, if possible
        if (value && value.toJSON && typeof value.toJSON === "function") {
            value = value.toJSON();
        }

        // If the user-supplied replacer if a function, call it. If it's an array, check objects' string keys for
        // presence in the array (removing the key/value pair from the resulting JSON if the key is missing).
        if (typeof(replacer) === "function") {
            return replacer.call(holder, key, value);
        } else if(replacer) {
            if (isTopLevel || isArray(holder) || replacer.indexOf(key) >= 0) {
                return value;
            } else {
                return undefined;
            }
        } else {
            return value;
        }
    };

    function isWordChar(char) {
        return (char >= 'a' && char <= 'z') ||