Embedded syntax

[coder543]

I did some experimentation tonight, and it seems entirely possible to have the different attributes support nice-looking simple things, in addition to complex expressions.

Currently, there is code like:

<div class="view",>
    <input class="toggle", type="checkbox", checked=is_complete, onclick=move|_| Msg::Toggle(idx), />
</div>

My testing shows it is possible to extend the macro in such a way that you can have:

<div class="view">
    <input class="toggle" type="checkbox" checked=is_complete onclick=move|_| Msg::Toggle(idx), />
</div>

The key to making this work is, unfortunately, duplication.

Instead of:

($stack:ident (checked = $kind:expr, $($tail:tt)*)) => {
    $crate::macros::set_checked(&mut $stack, $kind);
    html_impl! { $stack ($($tail)*) }
};

you can do something similar to:

($stack:ident (checked = $kind:expr, $($tail:tt)*)) => {
    $crate::macros::set_checked(&mut $stack, $kind);
    html_impl! { $stack ($($tail)*) }
};
($stack:ident (checked = $kind:tt $($tail:tt)*)) => {
    $crate::macros::set_checked(&mut $stack, $kind);
    html_impl! { $stack ($($tail)*) }
};

This way, users are able to either place a single token, like a string literal or a variable name, or they can place a full expression ended with a comma.

If this is something you're interested in, I can try to make the concept happen at full-scale at some point. I put in a couple of hours tonight, but I just reset my changes because I'm too tired. I also wonder if the macro might be generalized better, to reduce code duplication throughout the macro, and to make it more robust... less prone to errors that seem temperamental.

[machineloop]

Good points @coder543! I agree, making it possible to paste HTML into the macro would be ideal from a front-end perspective. Often time I'll have static HTML that I use to start creating components, so going through and adding commas after every attribute has been a painpoint.

[therustmonk]

@coder543 Thank you for the good idea! I will try it.

[jstarry]

This is fixed in 0.7