Skip to content

Use enums to clarify DepNodeColorMap color marking #154201

Open
Zalathar wants to merge 2 commits intorust-lang:mainfrom
Zalathar:try-set-color
Open

Use enums to clarify DepNodeColorMap color marking #154201
Zalathar wants to merge 2 commits intorust-lang:mainfrom
Zalathar:try-set-color

Conversation

@Zalathar
Copy link
Member

When a function's documentation has to explain the meaning of nested results and options, then it is often a good candidate for using a custom result enum instead.

This PR also renames DepNodeColorMap::try_mark to try_set_color, to make it more distinct from the similarly-named DepGraph::try_mark_green.

The difference is that try_mark_green is a higher-level operation that tries to determine whether a node can be marked green, whereas try_set_color is a lower-level operation that actually records a colour for the node.

The updated docs for try_set_color also fix a typo: atomicalyatomically.

r? nnethercote (or compiler)

When a function's documentation has to explain the meaning of nested results
and options, then it is often a good candidate for using a custom result enum
instead.

This commit also renames `DepNodeColorMap::try_mark` to `try_set_color`, to
make it more distinct from the similarly-named `DepGraph::try_mark_green`.

The difference is that `try_mark_green` is a higher-level operation that tries
to determine whether a node _can_ be marked green, whereas `try_set_color` is a
lower-level operation that actually records a color for the node.
This method is only used to initialize the always-red node, which can be done
with `try_set_color` instead.
@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Mar 22, 2026
}
}

/// The color that [`DepNodeColorMap::try_set_color`] should try to apply to a node.
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

FWIW, I find these comments saying which functions use a type to be not that useful, and prone to getting out of date. The comments on the variants themselves are much more useful.

@nnethercote
Copy link
Contributor

@bors r+ rollup

@rust-bors
Copy link
Contributor

rust-bors bot commented Mar 22, 2026

📌 Commit 1fec51c has been approved by nnethercote

It is now in the queue for this repository.

@rust-bors rust-bors bot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 22, 2026
Zalathar added a commit to Zalathar/rust that referenced this pull request Mar 22, 2026
Use enums to clarify `DepNodeColorMap` color marking

When a function's documentation has to explain the meaning of nested results and options, then it is often a good candidate for using a custom result enum instead.

This PR also renames `DepNodeColorMap::try_mark` to `try_set_color`, to make it more distinct from the similarly-named `DepGraph::try_mark_green`.

The difference is that `try_mark_green` is a higher-level operation that tries to determine whether a node _can_ be marked green, whereas `try_set_color` is a lower-level operation that actually records a colour for the node.

The updated docs for `try_set_color` also fix a typo: *atomicaly* → *atomically*.

r? nnethercote (or compiler)
rust-bors bot pushed a commit that referenced this pull request Mar 22, 2026
Rollup of 7 pull requests

Successful merges:

 - #122668 (Add APIs for dealing with titlecase)
 - #153312 (Packages as namespaces part 1)
 - #153534 (Remove a flaky `got_timeout` assert from two channel tests)
 - #154175 (Add new alias for Guillaume Gomez email address)
 - #154182 (diagnostics: avoid ICE for undeclared generic parameter in impl)
 - #154188 (Update the tracking issue for #[diagnostic::on_move])
 - #154201 (Use enums to clarify `DepNodeColorMap` color marking )
Zalathar added a commit to Zalathar/rust that referenced this pull request Mar 22, 2026
Use enums to clarify `DepNodeColorMap` color marking

When a function's documentation has to explain the meaning of nested results and options, then it is often a good candidate for using a custom result enum instead.

This PR also renames `DepNodeColorMap::try_mark` to `try_set_color`, to make it more distinct from the similarly-named `DepGraph::try_mark_green`.

The difference is that `try_mark_green` is a higher-level operation that tries to determine whether a node _can_ be marked green, whereas `try_set_color` is a lower-level operation that actually records a colour for the node.

The updated docs for `try_set_color` also fix a typo: *atomicaly* → *atomically*.

r? nnethercote (or compiler)
rust-bors bot pushed a commit that referenced this pull request Mar 22, 2026
Rollup of 9 pull requests

Successful merges:

 - #122668 (Add APIs for dealing with titlecase)
 - #153312 (Packages as namespaces part 1)
 - #153534 (Remove a flaky `got_timeout` assert from two channel tests)
 - #153582 (Simplify find_attr! for HirId usage)
 - #154174 (allow `incomplete_features` in most UI tests)
 - #154175 (Add new alias for Guillaume Gomez email address)
 - #154182 (diagnostics: avoid ICE for undeclared generic parameter in impl)
 - #154188 (Update the tracking issue for #[diagnostic::on_move])
 - #154201 (Use enums to clarify `DepNodeColorMap` color marking )
JonathanBrouwer added a commit to JonathanBrouwer/rust that referenced this pull request Mar 22, 2026
Use enums to clarify `DepNodeColorMap` color marking

When a function's documentation has to explain the meaning of nested results and options, then it is often a good candidate for using a custom result enum instead.

This PR also renames `DepNodeColorMap::try_mark` to `try_set_color`, to make it more distinct from the similarly-named `DepGraph::try_mark_green`.

The difference is that `try_mark_green` is a higher-level operation that tries to determine whether a node _can_ be marked green, whereas `try_set_color` is a lower-level operation that actually records a colour for the node.

The updated docs for `try_set_color` also fix a typo: *atomicaly* → *atomically*.

r? nnethercote (or compiler)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

3 participants