mirror of
https://github.com/realm/SwiftLint.git
synced 2026-06-06 20:18:40 +00:00
JP Simard
b83e0991b9
The MIT license doesn't require that all files be prepended with this licensing or copyright information. Realm confirmed that they're ok with this change. This will enable some companies to contribute to SwiftLint and the date & authorship information will remain accessible via git source control.
32 lines
1.0 KiB
Swift
32 lines
1.0 KiB
Swift
import SourceKittenFramework
|
|
|
|
public struct EmptyStringRule: ConfigurationProviderRule, OptInRule {
|
|
public var configuration = SeverityConfiguration(.warning)
|
|
|
|
public init() {}
|
|
|
|
public static let description = RuleDescription(
|
|
identifier: "empty_string",
|
|
name: "Empty String",
|
|
description: "Prefer checking `isEmpty` over comparing `string` to an empty string literal.",
|
|
kind: .performance,
|
|
nonTriggeringExamples: [
|
|
"myString.isEmpty",
|
|
"!myString.isEmpy"
|
|
],
|
|
triggeringExamples: [
|
|
"myString↓ == \"\"",
|
|
"myString↓ != \"\""
|
|
]
|
|
)
|
|
|
|
public func validate(file: File) -> [StyleViolation] {
|
|
let pattern = "\\b\\s*(==|!=)\\s*\"\""
|
|
return file.match(pattern: pattern, with: [.string]).map {
|
|
StyleViolation(ruleDescription: type(of: self).description,
|
|
severity: configuration.severity,
|
|
location: Location(file: file, characterOffset: $0.location))
|
|
}
|
|
}
|
|
}
|