"can be built on Ref::map"… how? #32100
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Now that `std::cell::Ref::filter_map` and `RefMut::filter_map` are deprecated, using them gives a warning like: ``` script/dom/element.rs:754:9: 754:24 warning: use of deprecated item: can be built on Ref::map, #[warn(deprecated)] on by default ``` But it’s not at all obvious *how* the functionality can be built on `Ref::map`. This PR adds to the warning message a crates.io URL for a crate that does.
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"can be built on Ref::map"… how? Now that `std::cell::Ref::filter_map` and `RefMut::filter_map` are deprecated, using them gives a warning like: ``` script/dom/element.rs:754:9: 754:24 warning: use of deprecated item: can be built on Ref::map, #[warn(deprecated)] on by default ``` But it’s not at all obvious *how* the functionality can be built on `Ref::map`. This PR adds to the warning message a crates.io URL for a crate that does.
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Now that
std::cell::Ref::filter_mapandRefMut::filter_mapare deprecated, using them gives a warning like:But it’s not at all obvious how the functionality can be built on
Ref::map. This PR adds to the warning message a crates.io URL for a crate that does.