Added the ability to use #[default] and added Default in the derive trait #3
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| for (attributes, variant_name, variant_value) in triples.into_iter() { | ||
| if attributes.to_string().contains("default") { | ||
| if default_position.is_some() { | ||
| // error!("Multiple variants marked as default"); |
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Did you mean to get rid of this if statement? I'm not 100% sure, but I would assume that derive(Default) itself will trigger an error if it sees multiple defaults.
Also it looks like we don't actually need to do anything with the default variant, so you probably don't need the default_position variable.
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So, um, it kinda triggers a error
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Got it. Looks like someone opened a pr to fix the error message here in response to the issue you opened.
Still, I suppose I'd prefer it if we propagated the error, because even after that pr lands, I'm assuming it might take a little while for that fix to be in a release.
Also, I just realized, as you probably noticed, we can't just use the error! macro here because your function doesn't return a TokenStream. I think the "correct" thing to do here would be to return Result<(), String> from check_for_default and check for an error when you call it, then call error! from there.
| if default_position.is_some() { | ||
| // error!("Multiple variants marked as default"); | ||
| } | ||
| default_position = Some(variant_value.to_string().parse::<usize>().unwrap()); |
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You could do a return here instead. And if you do, you won't need to do if !default_position.is_some() below.
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@TheEppicJR Thanks! Merged! I'll do some nitpick changes and publish a new version soon |
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@TheEppicJR Just a heads up: I'm going to make some modifications so that we only derive I just realized that this could break anyone who already has code like Hope you don't mind. I mean, if you really want the first element to be the default, I think it's also more rusty and not too verbose to have an explicit I'm open to changing my mind, so let me know if you disagree. |
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Version 1.2.0 now published with this pr link |
This adds the ability to use
#[default]when declaring the enum and addsDefaultto the derives for the enumThis allows you to derive the trait
Defaultfor structs that contain a enum generated using this macro