function addComments()

in benchmark/old.js [746:802]
45 lines of code
15 McCabe index (conditional complexity)

    function addComments(stmt, result) {
        var i, len, comment, save, tailingToStatement, specialBase, fragment;

        if (stmt.leadingComments && stmt.leadingComments.length > 0) {
            save = result;

            comment = stmt.leadingComments[0];
            result = [];
            if (safeConcatenation && stmt.type === Syntax.Program && stmt.body.length === 0) {
                result.push('\n');
            }
            result.push(generateComment(comment));
            if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
                result.push('\n');
            }

            for (i = 1, len = stmt.leadingComments.length; i < len; ++i) {
                comment = stmt.leadingComments[i];
                fragment = [generateComment(comment)];
                if (!endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) {
                    fragment.push('\n');
                }
                result.push(addIndent(fragment));
            }

            result.push(addIndent(save));
        }

        if (stmt.trailingComments) {
            tailingToStatement = !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString());
            specialBase = stringRepeat(' ', calculateSpaces(toSourceNodeWhenNeeded([base, result, indent]).toString()));
            for (i = 0, len = stmt.trailingComments.length; i < len; ++i) {
                comment = stmt.trailingComments[i];
                if (tailingToStatement) {
                    // We assume target like following script
                    //
                    // var t = 20;  /**
                    //               * This is comment of t
                    //               */
                    if (i === 0) {
                        // first case
                        result = [result, indent];
                    } else {
                        result = [result, specialBase];
                    }
                    result.push(generateComment(comment, specialBase));
                } else {
                    result = [result, addIndent(generateComment(comment))];
                }
                if (i !== len - 1 && !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
                    result = [result, '\n'];
                }
            }
        }

        return result;
    }