This would be great! However, I would imagine that any changes to function arguments needs include (or explicitly reject) all wanted changes to function arguments. This would include variadic functions and default values.
The most important thing that could be added to Rust in 2019 is, in my opinion, named argument syntax. It's a very simple feature, but it makes workday-programming easier, which in the end is first priority above deeper features. E.g. could use the underscore-trick from Dyon!
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That's the chicken-and-the-egg problem of named arguments: I want this simple feature, but how it is implemented affects many other pieces with complex parts, so it has to wait until all those complex parts has been solved.
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Hmm now you've made me think about how you could hack this with macros
you could basically generate a struct (which does have named arguments) based on the parameters of a function and then insert it into the call -
I did that! Check out the rubber_duck crate: https://crates.io/crates/rubber_duck … I couldn't come up with a good name for it...
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Well, I once had a crate named "quack", so you're in good company.
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