Add opt-in unneeded_throws_rethrows rule
#6069
Open
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Generated by 🚫 Danger |
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
msrutek-paylocity
approved these changes
May 6, 2025
|
@SimplyDanny Any thoughts on this? :) |
|
@tonyskansf It seems that some conflicts have arisen, would you mind resolving them? Thanks! |
SimplyDanny
requested changes
Jun 30, 2025
There was a problem hiding this comment.
Looks very good already! You thought about many special cases already. The rule also makes sense. But adding it as opt-in is important as it can cause false positives in the context of protocol implementations (and maybe more occasions).
I've added a few comments. Please also check the findings reported by the OSS scan.
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRuleExamples.swift
Show resolved
Hide resolved
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
|
You need to rebase onto |
tonyskansf
force-pushed
the
opt-in-unneeded-throws-rule
branch
from
3c154d1 to
bb93bfe
Compare
SimplyDanny
reviewed
Jul 23, 2025
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
Source/SwiftLintBuiltInRules/Rules/Lint/UnneededThrowsRule.swift
Outdated
Show resolved
Hide resolved
|
@SimplyDanny Please can you take a look again. Appreciate your time! Thank you |
SimplyDanny
requested changes
Oct 25, 2025
| * Support deinitializers and subscripts in `function_body_length` rule. | ||
| [SimplyDanny](https://github.com/SimplyDanny) | ||
|
|
||
| * Add opt-in `unneeded_throws_rethrows` rules that triggers when declarations |
There was a problem hiding this comment.
Suggested change
| * Add opt-in `unneeded_throws_rethrows` rules that triggers when declarations | |
| * Add opt-in `unneeded_throws_rethrows` rule that triggers when declarations |
|
|
||
| static let description = RuleDescription( | ||
| identifier: "unneeded_throws_rethrows", | ||
| name: "Unneeded (re)throws keyword", |
There was a problem hiding this comment.
Suggested change
| name: "Unneeded (re)throws keyword", | |
| name: "Unneeded (Re)Throws Keyword", |
| } | ||
|
|
||
| override func visit(_ node: FunctionCallExprSyntax) -> SyntaxVisitorContinueKind { | ||
| if node.containsTaskDeclaration { |
There was a problem hiding this comment.
Thinking again about this case ... it's not only relevant for tasks but for closures passed to functions in general, isn't it? So if we have
func h() throws {
f(1) {
try g()
}
}currently this doesn't trigger, yet it should.
SimplyDanny
reviewed
Oct 25, 2025
| } | ||
| """), | ||
| Example(""" | ||
| let foo: () throws -> Void |
There was a problem hiding this comment.
This would trigger
let foo: () throws -> Void = barbut shouldn't as we don't know what bar exactly is.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
4 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Add a new opt-in rule that detects unnecessary
throws, helping avoid misleading definitions and requirements for the caller to write unnecessary error handling.