Implement for-else #518
Implement for-else #518
Conversation
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I'm not sure I'm a fan of this, since Rust does not have for-else itself. In most cases, you could probably handle this by calling |
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I implemented for-else like Jinja does, which is not equivalent to Python's semantics. In Python the else block is executed unless a In Jinja the else block is only executed if the inner block was never entered. I guess I should implement |
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I added |
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Do you actually have use cases for this syntax, or are you just aiming for feature parity with Jinja? |
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For what it's worth, I technically have a use case for both :)
On one hand, I always think less code is nice. On the other hand, it only requires 1 extra set of |
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Ah, this has a conflict now. Otherwise looking good; for bonus points, also add some docs? |
This PR implements for-else statements like in Jinja. They make it easy
to print an alternative message if the loop iterator was empty. E.g.
```rs
{% for result in result %}
<li>{{ result }}</li>
{% else %}
<li><em>no results</em></li>
{% endfor %}
```
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Thank you! I'll have a look at the book. I guess the changes of some of the older PRs need to be mentioned, too. |
This PR implements for-else statements like in Jinja. They make it easy
to print an alternative message if the loop iterator was empty. E.g.