Remove use of paste library.
#60
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`paste` has been given an “unmaintained” advisory and that means, regardless of whether it is still any good, people will get warnings for having it in their transitive dependencies. I would like to avoid that. Luckily, it turns out that we can just replace all of the token pasting with generic code. (Rust 1.79 added the `num::NonZero<T>` generic type, too, but that isn’t actually helping us because the `ZeroablePrimitive` trait it depends on is still unstable — so we still need to define separate concrete implementations.) If a need for `paste`-like functionality comes up again, we can consider adding the functionality to our own `exhaust-macros`, look at what alternatives have developed by then, or see whether the RustSec policy has gained more nuance about “unmaintained” vs “done” status. But for now, this is one fewer dependency, quite cheaply, and less fuss.
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pastehas been given an “unmaintained” advisory and that means, regardless of whether it is still any good, people will get warnings for having it in their transitive dependencies. I would like to avoid that.Luckily, it turns out that we can just replace all of the token pasting with generic code. (Rust 1.79 added the
num::NonZero<T>generic type, too, but that isn’t actually helping us because theZeroablePrimitivetrait it depends on is still unstable — so we still need to define separate concrete implementations.)If a need for
paste-like functionality comes up again, we can consider adding the functionality to our ownexhaust-macros, look at what alternatives have developed by then, or see whether the RustSec policy has gained more nuance about “unmaintained” vs “done” status. But for now, this is one fewer dependency, quite cheaply, and less fuss.