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Migrate rustc_trait_selection::traits::error_reporting::suggestions to SessionDiagnostic #101466

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Migrate rustc_trait_selection::traits::error_reporting::suggestions to SessionDiagnostic #101466

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@str4d
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@str4d str4d commented Sep 6, 2022

Part of #100717.

@rustbot rustbot added A-translation Area: Translation infrastructure, and migrating existing diagnostics to SessionDiagnostic T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Sep 6, 2022
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r? @nagisa

(rust-highfive has picked a reviewer for you, use r? to override)

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Sep 6, 2022
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The job mingw-check failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot) 
configure: rust.debug-assertions := True
configure: rust.overflow-checks := True
configure: llvm.assertions      := True
configure: dist.missing-tools   := True
configure: build.configure-args := ['--enable-sccache', '--disable-manage-submodu ...
configure: writing `config.toml` in current directory
configure: 
configure: run `python /checkout/x.py --help`
Attempting with retry: make prepare
---
* highest error code: E0790
Found 506 error codes
Found 0 error(s) in error codes
Done!
tidy error: /checkout/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs:1469: TODO is deprecated; use FIXME
tidy error: /checkout/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs:1491: TODO is deprecated; use FIXME
tidy error: /checkout/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs:1501: TODO is deprecated; use FIXME
tidy error: /checkout/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs:1503: TODO is deprecated; use FIXME
tidy error: /checkout/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs:1532: TODO is deprecated; use FIXME
tidy error: /checkout/compiler/rustc_trait_selection/src/errors/suggestions.rs:96: TODO is deprecated; use FIXME
tidy error: /checkout/compiler/rustc_trait_selection/src/errors/suggestions.rs:276: TODO is deprecated; use FIXME
tidy error: /checkout/compiler/rustc_trait_selection/src/errors/suggestions.rs:278: TODO is deprecated; use FIXME
some tidy checks failed
Build completed unsuccessfully in 0:00:09

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r? @davidtwco

@rust-highfive rust-highfive assigned davidtwco and unassigned nagisa Sep 6, 2022
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bors commented Sep 13, 2022

☔ The latest upstream changes (presumably #101736) made this pull request unmergeable. Please resolve the merge conflicts.

davidtwco
davidtwco reviewed Sep 13, 2022
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Apologies that it took so long for me to get to this review!

compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
// FIXME: Ensure that the create_err() calls below are equivalent to:
// err.code(error_code!(E0746));
// err.set_primary_message("return type cannot have an unboxed trait object");
// err.children.clear();
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create_err creates an entirely new error so it might not be exactly the same but if it isn't observable in testing then it's probably fine.

compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
err.subdiagnostic(NoteObligation::RepeatElementCopyHelpConstFn {
example_a: "const VAL: Type = const_fn();",
example_b: "let x = [VAL; 42];",
});
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Why not just include example_a and example_b in the Fluent message?

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This way, the translators don't need to deal with the Rust code, we ensure that it is identical across all translations with no typos, and if the Rust code needs updating we can potentially do so without altering the translations.

compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
},
);
if ty.references_error() {
err.span_label(span, &String::new());
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You might be able to do this with a

trait_selection_empty = {""}

compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
assoc_span,
predicate: predicate.to_string(),
item_name,
kind: kind.to_string(),
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Can we implement IntoDiagnosticArg on this?

compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
_ => err.note(&msg),
_ => err.subdiagnostic(NoteObligation::ImplDerivedObligation {
ty: parent_trait_pred.skip_binder().self_ty(),
trait_path: parent_trait_pred.print_modifiers_and_trait_path().to_string(),
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We might be able to implement IntoDiagnosticArg for TraitPredPrintModifiersAndPath too

@davidtwco davidtwco mentioned this pull request Sep 22, 2022
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@Noratrieb
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Hi, I've seen you changed some diagnostic structs in your PR. After #103345, the way we refer to fluent messages changed. They are now in a flat namespace with the same identifier as in the fluent file. For example, parser::cool_thing is now parser_cool_thing and parser::suggestion just suggestion.
You should rebase to the latest master and change your fluent message references as described above. Thanks!

@jackh726 jackh726 added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 10, 2023
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@str4d any updates on this?

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Closing this pr as inactive

@Dylan-DPC Dylan-DPC closed this Jul 26, 2023
@Dylan-DPC Dylan-DPC added S-inactive Status: Inactive and waiting on the author. This is often applied to closed PRs. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jul 26, 2023
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