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Rustdoc not showing return type but showing return type lifetimes #52376

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bjorn3 opened this issue Jul 14, 2018 · 2 comments
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Rustdoc not showing return type but showing return type lifetimes #52376

bjorn3 opened this issue Jul 14, 2018 · 2 comments
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A-impl-trait Area: impl Trait. Universally / existentially quantified anonymous types with static dispatch. C-bug Category: This is a bug. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.

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@bjorn3
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bjorn3 commented Jul 14, 2018

https://doc.rust-lang.org/nightly/nightly-rustc/rustc_mir/interpret/struct.Memory.html#method.allocations

screenshot_2018-07-14 rustc_mir interpret memory - rust

@FanShupei
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It seems the nightly rustdoc cannot handle impl Trait well. It works in argument position, not in return position.

I tried with a minimal examle. Create a new lib project, and write following in lib.rs, then cargo doc.

pub fn f(x: impl Copy) -> impl Copy {
    1
}

The output is weird. The return type vanishes.

pub fn f(x: impl Copy) -> 

rustdoc vesion: rustdoc 1.29.0-nightly (254f879 2018-07-13)
toolchain: nightly-x86_64-unknown-linux-gnu

@csmoe csmoe added the T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. label Jul 15, 2018
@QuietMisdreavus QuietMisdreavus added A-impl-trait Area: impl Trait. Universally / existentially quantified anonymous types with static dispatch. C-bug Category: This is a bug. labels Aug 9, 2018
@GuillaumeGomez GuillaumeGomez self-assigned this Aug 20, 2018
@GuillaumeGomez
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Fixed in #53541.

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Labels
A-impl-trait Area: impl Trait. Universally / existentially quantified anonymous types with static dispatch. C-bug Category: This is a bug. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
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