46 lines
1.8 KiB
Swift
46 lines
1.8 KiB
Swift
import SwiftSyntax
|
|
|
|
struct IsDisjointRule: SwiftSyntaxRule, ConfigurationProviderRule {
|
|
var configuration = SeverityConfiguration(.warning)
|
|
|
|
init() {}
|
|
|
|
static let description = RuleDescription(
|
|
identifier: "is_disjoint",
|
|
name: "Is Disjoint",
|
|
description: "Prefer using `Set.isDisjoint(with:)` over `Set.intersection(_:).isEmpty`",
|
|
kind: .idiomatic,
|
|
nonTriggeringExamples: [
|
|
Example("_ = Set(syntaxKinds).isDisjoint(with: commentAndStringKindsSet)"),
|
|
Example("let isObjc = !objcAttributes.isDisjoint(with: dictionary.enclosedSwiftAttributes)"),
|
|
Example("_ = Set(syntaxKinds).intersection(commentAndStringKindsSet)"),
|
|
Example("_ = !objcAttributes.intersection(dictionary.enclosedSwiftAttributes)")
|
|
],
|
|
triggeringExamples: [
|
|
Example("_ = Set(syntaxKinds).↓intersection(commentAndStringKindsSet).isEmpty"),
|
|
Example("let isObjc = !objcAttributes.↓intersection(dictionary.enclosedSwiftAttributes).isEmpty")
|
|
]
|
|
)
|
|
|
|
func makeVisitor(file: SwiftLintFile) -> ViolationsSyntaxVisitor {
|
|
Visitor(viewMode: .sourceAccurate)
|
|
}
|
|
}
|
|
|
|
private extension IsDisjointRule {
|
|
final class Visitor: ViolationsSyntaxVisitor {
|
|
override func visitPost(_ node: MemberAccessExprSyntax) {
|
|
guard
|
|
node.name.text == "isEmpty",
|
|
let firstBase = node.base?.asFunctionCall,
|
|
let firstBaseCalledExpression = firstBase.calledExpression.as(MemberAccessExprSyntax.self),
|
|
firstBaseCalledExpression.name.text == "intersection"
|
|
else {
|
|
return
|
|
}
|
|
|
|
violations.append(firstBaseCalledExpression.name.positionAfterSkippingLeadingTrivia)
|
|
}
|
|
}
|
|
}
|