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rustdoc: Appearance of #[doc(hidden)] differs from all the other attributes #132304

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fmease opened this issue Oct 29, 2024 · 2 comments
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A-attributes Area: Attributes (`#[…]`, `#![…]`) A-rustdoc-ui Area: Rustdoc UI (generated HTML) C-bug Category: This is a bug. P-low Low priority requires-nightly This issue requires a nightly compiler in some way. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.

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@fmease
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fmease commented Oct 29, 2024

One reproducer where it's quite pronounced:

#[doc(hidden)]
#[non_exhaustive]
#[repr(C)]
pub struct S(u8);

Output (with --document-hidden-items -Zunstable-options1):

Image

That's because it gets rendered separately in visibility_print_with_space. I would rather we didn't do that. It should be printed together with all the other attributes and have the same visual appearance.

Footnotes

  1. Hence the requires-nightly This issue requires a nightly compiler in some way. label

@fmease fmease added A-attributes Area: Attributes (`#[…]`, `#![…]`) A-rustdoc-ui Area: Rustdoc UI (generated HTML) C-bug Category: This is a bug. P-low Low priority requires-nightly This issue requires a nightly compiler in some way. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. labels Oct 29, 2024
@fmease fmease self-assigned this Oct 29, 2024
@rustbot rustbot added the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Oct 29, 2024
@fmease fmease removed the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Oct 29, 2024
@fmease fmease changed the title rustdoc: Appearance of #[doc(hidden)] differs from all other attributes rustdoc: Appearance of #[doc(hidden)] differs from all the other attributes Oct 29, 2024
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Screenshot is broken :(

@fmease
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fmease commented Oct 30, 2024

Oops, fixed. The link pointed into my private issue tracker. Reuploaded. Thanks for the notice :)

matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Nov 13, 2024
…o-decl, r=notriddle

rustdoc: Treat declarative macros more like other item kinds

Apparently at some time in the past we were unable to generate an href for the module path inside the visibility of decl macros 2.0 (`pub(in ...)`). As a result of this, a whole separate function was introduced specifically for printing the visibility of decl macros that didn't attempt to generate any links. The description of PR rust-lang#84074 states:

> This fixes the overly-complex invariant mentioned in rust-lang#83237 (comment), where the macro source can't have any links in it only because the cache hasn't been populated yet.

I can no longer reproduce the original issue. Reusing the existing visibility rendering logic *seems* to work just fine (I couldn't come up with any counterexamples, though I invite you to prove me wrong).

* Fixes rust-lang#83000
* Fixes the visibility showing up "twice" in rustdoc-JSON output: Once as the `visibility` field, once baked into the source[^1]
* Fixes `#[doc(hidden)]` not getting rendered on doc(hidden) decl macros 2.0 under `--document-hiden-items` (for decl macros 1.2 the issue remains; I will address this separately when fixing rust-lang#132304).

---

<details><summary>Outdated Section</summary>

NOTE: The current version of this PR is committing a UI crime, I'd like to receive feedback on that. Maybe you have a satisfactory solution for how to remedy it. Namely, as you know we have two different ways of / modes for highlighting code with color:

1. Only highlighting links / item paths and avoiding to highlight tokens by kind like keywords (to reduce visual noise and maybe also artifact size). Used for item declarations(\*).
2. Highlighting tokens by kind. Used for code blocks written by the user.

(\*): With the notable exception being macro declarations! Well, since this PR reuses the same function for rendering the item visibility (which only makes sense), we have a clash of modes: We now use both ways of highlighting code for decl macros: №1 for the visibility, №2 for the rest. This awkward. See for yourself:

* On master: ![Screenshot 2024-10-29 at 03-37-48 by_example_vis_named in decl_macro a b c - Rust](https://github.com/user-attachments/assets/22f0ab6e-9ba9-4c4e-8fb0-0741c91d360b)
* On this branch: ![Screenshot 2024-10-29 at 03-36-41 by_example_vis_named in decl_macro a b c - Rust](https://github.com/user-attachments/assets/b11d81a3-3e2e-43cb-a5b8-6773a3048732)

</details>

Furthermore, we now no longer syntax-highlight declarative macros (be it `macro_rules!` or `macro`) since that was inconsistent with the way we render all other item kinds. See (collapsed) *Outdated Section* above. See also rust-lang#132302 (comment).

| On master | On this branch |
|---|---|
| ![Screenshot 2024-11-13 at 16-12-46 by_example_vis_named in decl_macro a b c - Rust](https://github.com/user-attachments/assets/cb3aeb42-a56d-4ced-80d9-f2694f369af1) | ![Screenshot 2024-11-13 at 16-13-22 by_example_vis_named in decl_macro a b c - Rust](https://github.com/user-attachments/assets/b73bee50-1b85-4862-afba-5ad471443ccc) |

[^1]: E.g., `"visibility":{"restricted":{"parent":1,"path":"::a"}},/*OMITTED*/,"inner":{"macro":"pub(in a) macro by_example_vis_named($foo:expr) {\n    ...\n}"}`
rust-timer added a commit to rust-lang-ci/rust that referenced this issue Nov 14, 2024
Rollup merge of rust-lang#132302 - fmease:rustdoc-better-vis-for-macro-decl, r=notriddle

rustdoc: Treat declarative macros more like other item kinds

Apparently at some time in the past we were unable to generate an href for the module path inside the visibility of decl macros 2.0 (`pub(in ...)`). As a result of this, a whole separate function was introduced specifically for printing the visibility of decl macros that didn't attempt to generate any links. The description of PR rust-lang#84074 states:

> This fixes the overly-complex invariant mentioned in rust-lang#83237 (comment), where the macro source can't have any links in it only because the cache hasn't been populated yet.

I can no longer reproduce the original issue. Reusing the existing visibility rendering logic *seems* to work just fine (I couldn't come up with any counterexamples, though I invite you to prove me wrong).

* Fixes rust-lang#83000
* Fixes the visibility showing up "twice" in rustdoc-JSON output: Once as the `visibility` field, once baked into the source[^1]
* Fixes `#[doc(hidden)]` not getting rendered on doc(hidden) decl macros 2.0 under `--document-hiden-items` (for decl macros 1.2 the issue remains; I will address this separately when fixing rust-lang#132304).

---

<details><summary>Outdated Section</summary>

NOTE: The current version of this PR is committing a UI crime, I'd like to receive feedback on that. Maybe you have a satisfactory solution for how to remedy it. Namely, as you know we have two different ways of / modes for highlighting code with color:

1. Only highlighting links / item paths and avoiding to highlight tokens by kind like keywords (to reduce visual noise and maybe also artifact size). Used for item declarations(\*).
2. Highlighting tokens by kind. Used for code blocks written by the user.

(\*): With the notable exception being macro declarations! Well, since this PR reuses the same function for rendering the item visibility (which only makes sense), we have a clash of modes: We now use both ways of highlighting code for decl macros: №1 for the visibility, №2 for the rest. This awkward. See for yourself:

* On master: ![Screenshot 2024-10-29 at 03-37-48 by_example_vis_named in decl_macro a b c - Rust](https://github.com/user-attachments/assets/22f0ab6e-9ba9-4c4e-8fb0-0741c91d360b)
* On this branch: ![Screenshot 2024-10-29 at 03-36-41 by_example_vis_named in decl_macro a b c - Rust](https://github.com/user-attachments/assets/b11d81a3-3e2e-43cb-a5b8-6773a3048732)

</details>

Furthermore, we now no longer syntax-highlight declarative macros (be it `macro_rules!` or `macro`) since that was inconsistent with the way we render all other item kinds. See (collapsed) *Outdated Section* above. See also rust-lang#132302 (comment).

| On master | On this branch |
|---|---|
| ![Screenshot 2024-11-13 at 16-12-46 by_example_vis_named in decl_macro a b c - Rust](https://github.com/user-attachments/assets/cb3aeb42-a56d-4ced-80d9-f2694f369af1) | ![Screenshot 2024-11-13 at 16-13-22 by_example_vis_named in decl_macro a b c - Rust](https://github.com/user-attachments/assets/b73bee50-1b85-4862-afba-5ad471443ccc) |

[^1]: E.g., `"visibility":{"restricted":{"parent":1,"path":"::a"}},/*OMITTED*/,"inner":{"macro":"pub(in a) macro by_example_vis_named($foo:expr) {\n    ...\n}"}`
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Labels
A-attributes Area: Attributes (`#[…]`, `#![…]`) A-rustdoc-ui Area: Rustdoc UI (generated HTML) C-bug Category: This is a bug. P-low Low priority requires-nightly This issue requires a nightly compiler in some way. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
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