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The inference problem caused by <code>Option::filter</code> on function result

A-inferenceArea: Type inferenceArea: Type inference

A-result-optionArea: Result and Option combinatorsArea: Result and Option combinators

C-discussionCategory: Discussion or questions that doesn't represent real issues.Category: Discussion or questions that doesn't represent real issues.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#130026 In rust-lang/rust;

· A4-Tacks opened on Sep 6, 2024

Addition of Option&lt;NonZero*&gt; can compile suboptimally

A-result-optionArea: Result and Option combinatorsArea: Result and Option combinators

C-optimizationCategory: An issue highlighting optimization opportunities or PRs implementing suchCategory: An issue highlighting optimization opportunities or PRs implementing such

E-needs-testCall for participation: An issue has been fixed and does not reproduce, but no test has been added.Call for participation: An issue has been fixed and does not reproduce, but no test has been added.

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#81342 In rust-lang/rust;

· cevans-uk opened on Jan 24, 2021

Generated Result propagation code is needlessly complex

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

A-result-optionArea: Result and Option combinatorsArea: Result and Option combinators

C-optimizationCategory: An issue highlighting optimization opportunities or PRs implementing suchCategory: An issue highlighting optimization opportunities or PRs implementing such

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#81146 In rust-lang/rust;

· tgnottingham opened on Jan 18, 2021

diagnostics: suggest Result instead of Option if inner arguments would match

A-diagnosticsArea: Messages for errors, warnings, and lintsArea: Messages for errors, warnings, and lints

A-result-optionArea: Result and Option combinatorsArea: Result and Option combinators

P-lowLow priorityLow priority

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#79900 In rust-lang/rust;

· matthiaskrgr opened on Dec 10, 2020

Tracking Issue for Result::flatten (<code>result_flattening</code>)

A-result-optionArea: Result and Option combinatorsArea: Result and Option combinators

B-unstableBlocker: Implemented in the nightly compiler and unstable.Blocker: Implemented in the nightly compiler and unstable.

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

Libs-SmallLibs issues that are considered "small" or self-containedLibs issues that are considered "small" or self-contained

Libs-TrackedLibs issues that are tracked on the team's project board.Libs issues that are tracked on the team's project board.

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#70142 In rust-lang/rust;

· Nemo157 opened on Mar 19, 2020

Tracking Issue for <code>Option::zip</code> and <code>Option::zip_with</code> (feature <code>option_zip</code>)

A-result-optionArea: Result and Option combinatorsArea: Result and Option combinators

B-unstableBlocker: Implemented in the nightly compiler and unstable.Blocker: Implemented in the nightly compiler and unstable.

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

Libs-SmallLibs issues that are considered "small" or self-containedLibs issues that are considered "small" or self-contained

Libs-TrackedLibs issues that are tracked on the team's project board.Libs issues that are tracked on the team's project board.

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#70086 In rust-lang/rust;

· LukasKalbertodt opened on Mar 17, 2020

Suggest .err().expect() if .expect_err() is not implemented

A-result-optionArea: Result and Option combinatorsArea: Result and Option combinators

A-suggestion-diagnosticsArea: Suggestions generated by the compiler applied by `cargo fix`Area: Suggestions generated by the compiler applied by `cargo fix`

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#65019 In rust-lang/rust;

· lukaslueg opened on Oct 2, 2019

Tracking issue for <code>Result::into_ok</code>

A-result-optionArea: Result and Option combinatorsArea: Result and Option combinators

B-unstableBlocker: Implemented in the nightly compiler and unstable.Blocker: Implemented in the nightly compiler and unstable.

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

Libs-SmallLibs issues that are considered "small" or self-containedLibs issues that are considered "small" or self-contained

Libs-TrackedLibs issues that are tracked on the team's project board.Libs issues that are tracked on the team's project board.

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#61695 In rust-lang/rust;

· phaylon opened on Jun 9, 2019