Recursive for loops

Since there is no while nor in Jinja, nor in Nunjucks, and without it (or functions) it’s quite tricky (or maybe even impossible) to, let’s say, output multilevel object (which can be, for example, sitemap), it would be very nice to have recursive flag for loops, as per http://jinja.pocoo.org/docs/dev/templates/#for

[jbmoelker]

Just like a function a macro can call itself recursively. So I’d argue there is no need for a custom “recursive” tag in the Nunjucks core library. Here’s an example of solving this with normal macro:

<nav>
    <h2>Site menu</h2>
    <ul>
        {% for item in menu %}
        {{ menuItem(item) }}
        {% endfor %}
    </ul>
</nav>

{% macro menuItem(item) %}
<li>
    {{ item.text }}
    {% if item.items %}
    <ul>
        {% for item in item.items %}
        {{ menuItem(item) }}
        {% endfor %}
    </ul>
    {% endif %}
</li>
{% endmacro %}

See Live example of menu with nested items using Nunjucks macro recursively.

[fdintino]

I have opted not to close this because it is a feature in jinja2 and adding it would increase syntax parity.