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Add joined_default_parameter opt-in rule #1746
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marcelofabri
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realm:master
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ornithocoder:joined_default_parameter
Aug 7, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| // | ||
| // JoinedDefaultRule.swift | ||
| // SwiftLint | ||
| // | ||
| // Created by Ornithologist Coder on 8/3/17. | ||
| // Copyright © 2017 Realm. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
| import SourceKittenFramework | ||
|
|
||
| public struct JoinedDefaultParameterRule: ASTRule, ConfigurationProviderRule, OptInRule { | ||
| public var configuration = SeverityConfiguration(.warning) | ||
|
|
||
| public init() {} | ||
|
|
||
| public static let description = RuleDescription( | ||
| identifier: "joined_default_parameter", | ||
| name: "Joined Default Parameter", | ||
| description: "Discouraged explicit usage of the default separator.", | ||
| kind: .idiomatic, | ||
| nonTriggeringExamples: [ | ||
| "let foo = bar.joined()", | ||
| "let foo = bar.joined(separator: \",\")", | ||
| "let foo = bar.joined(separator: toto)" | ||
| ], | ||
| triggeringExamples: [ | ||
| "let foo = bar.joined(separator: ↓\"\")", | ||
| "let foo = bar.filter(toto)\n" + | ||
| " .joined(separator: ↓\"\")" | ||
| ] | ||
| ) | ||
|
|
||
| public func validate(file: File, | ||
| kind: SwiftExpressionKind, | ||
| dictionary: [String: SourceKitRepresentable]) -> [StyleViolation] { | ||
| guard | ||
| kind == .call, | ||
| dictionary.name?.hasSuffix(".joined") == true, | ||
| let defaultSeparatorOffset = defaultSeparatorOffset(dictionary: dictionary, file: file) | ||
| else { | ||
| return [] | ||
| } | ||
|
|
||
| return [StyleViolation(ruleDescription: type(of: self).description, | ||
| severity: configuration.severity, | ||
| location: Location(file: file, byteOffset: defaultSeparatorOffset))] | ||
| } | ||
|
|
||
| private func defaultSeparatorOffset(dictionary: [String: SourceKitRepresentable], file: File) -> Int? { | ||
| guard | ||
| dictionary.enclosedArguments.count == 1, | ||
| let argument = dictionary.enclosedArguments.first, | ||
| let argumentBodyOffset = argument.bodyOffset, | ||
| let argumentBodyLength = argument.bodyLength, | ||
| argument.name == "separator" | ||
| else { | ||
| return nil | ||
| } | ||
|
|
||
| let body = file.contents.bridge().substringWithByteRange(start: argumentBodyOffset, length: argumentBodyLength) | ||
| return body == "\"\"" ? argumentBodyOffset : nil | ||
| } | ||
| } |
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It looks like the examples are outdated too.
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Done :-)