Gate ConstParamTy_ trait behind const_param_ty_trait feature#153359
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zedddie wants to merge 1 commit intorust-lang:mainfrom
Open
Gate ConstParamTy_ trait behind const_param_ty_trait feature#153359zedddie wants to merge 1 commit intorust-lang:mainfrom
ConstParamTy_ trait behind const_param_ty_trait feature#153359zedddie wants to merge 1 commit intorust-lang:mainfrom
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BoxyUwU
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Mar 5, 2026
| /// Allows `for _ in _` loops in const contexts. | ||
| (unstable, const_for, "1.56.0", Some(87575)), | ||
| /// Allows naming and implementing `ConstParamTy_` directly. | ||
| (unstable, const_param_ty_trait, "CURRENT_RUSTC_VERSION", Some(95174)), |
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I think this should in theory be able to be a library feature instead of a language feature. I'm not sure exactly how those are added, I think you just mark an item in std as unstable and it makes one automatically 🤔
Then you dont need a new entry in this list or a new entry in symbol.rs
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Initially even when user wasn't using unsized const params, the only way to implement/name
ConstParamTy_was to use#![feature(unsized_const_params], now its gated underconst_param_ty_traitfeature, implied byunsized_const_params.I've also changed use of
unsized_const_paramsin tests which were using it only to implementConstParamTy_without using unsizedr? BoxyUwU