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Allow structs to have lifetime parameters even if those lifetimes are unused inside #13999

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pcwalton opened this issue May 6, 2014 · 2 comments
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Allow structs to have lifetime parameters even if those lifetimes are unused inside #13999

pcwalton opened this issue May 6, 2014 · 2 comments
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A-lifetimes Area: Lifetimes / regions A-type-system Area: Type system C-enhancement Category: An issue proposing an enhancement or a PR with one.

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@pcwalton
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pcwalton commented May 6, 2014

This has become useful for a few patterns in Servo where we want types that enforce that they can't be "stashed" anywhere.
@alexcrichton
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Would the marker types suffice for this use case?

@pcwalton
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pcwalton commented May 7, 2014

Yeah, I didn't realize they existed. We should switch Servo to use them.

@pcwalton pcwalton closed this as completed May 7, 2014
bors pushed a commit to rust-lang-ci/rust that referenced this issue Jan 28, 2025
@Manishearth
correct suggestions in no_std (rust-lang#13999)
83bde36 
I opened rust-lang/rust-clippy#13896 before.
However, I found that there're more cases where Clippy suggests to use
modules that belong to the `std` crate even in a `no_std` environment.
Therefore, this PR include the changes I've made in rust-lang#13896 and new
changes to fix cases I found this time to prevent wrong suggestions in
`no_std` environments as well.

changelog: [`redundant_closure`]: correct suggestion in `no_std`
changelog: [`repeat_vec_with_capacity`]: correct suggestion in `no_std`
changelog: [`single_range_in_vec_init`]: don't emit suggestion to use
`Vec` in `no_std`
changelog: [`drain_collect`]: correct suggestion in `no_std`
changelog: [`map_with_unused_argument_over_ranges`]: correct suggestion
in `no_std`

also close rust-lang#13895
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A-lifetimes Area: Lifetimes / regions A-type-system Area: Type system C-enhancement Category: An issue proposing an enhancement or a PR with one.
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