Add impl_tag! macro to implement Tag for tagged pointer easily
#110615
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| ( | ||
| impl Tag for $Self:ty; | ||
| $( | ||
| $($path:ident)::* $( { $( $fields:tt )* })? <=> $tag:literal, |
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Is customization according to $tag useful?
If not, you can use ${index()} to generate it automatically, like rustc_metadata::rmeta::table does.
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I guess the answer is "it could, but probably isn't". I'll work on it next week.
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…iaskrgr Rollup of 6 pull requests Successful merges: - rust-lang#110556 (Switch to `EarlyBinder` for `explicit_item_bounds`) - rust-lang#110615 (Add `impl_tag!` macro to implement `Tag` for tagged pointer easily) - rust-lang#110649 (Fix no_global_oom_handling build) - rust-lang#110671 (Consider polarity in new solver) - rust-lang#110783 (Fix ICE on --print=... i/o errors) - rust-lang#110796 (Updating Wake example to use new 'pin!' macro) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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r? @Nilstrieb
This should also lifts the need to think about safety from the callers (
impl_tag!is robust (ish, see the macro issue)) and removes the possibility of making a "weird"Tagimpl.