44 lines
2.0 KiB
Swift
44 lines
2.0 KiB
Swift
import SourceKittenFramework
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public struct OperatorFunctionWhitespaceRule: ConfigurationProviderRule, AutomaticTestableRule {
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public var configuration = SeverityConfiguration(.warning)
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public init() {}
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public static let description = RuleDescription(
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identifier: "operator_whitespace",
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name: "Operator Function Whitespace",
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description: "Operators should be surrounded by a single whitespace when defining them.",
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kind: .style,
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nonTriggeringExamples: [
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"func <| (lhs: Int, rhs: Int) -> Int {}\n",
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"func <|< <A>(lhs: A, rhs: A) -> A {}\n",
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"func abc(lhs: Int, rhs: Int) -> Int {}\n"
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],
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triggeringExamples: [
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"↓func <|(lhs: Int, rhs: Int) -> Int {}\n", // no spaces after
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"↓func <|<<A>(lhs: A, rhs: A) -> A {}\n", // no spaces after
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"↓func <| (lhs: Int, rhs: Int) -> Int {}\n", // 2 spaces after
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"↓func <|< <A>(lhs: A, rhs: A) -> A {}\n", // 2 spaces after
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"↓func <| (lhs: Int, rhs: Int) -> Int {}\n", // 2 spaces before
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"↓func <|< <A>(lhs: A, rhs: A) -> A {}\n" // 2 spaces before
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]
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)
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public func validate(file: SwiftLintFile) -> [StyleViolation] {
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let escapedOperators = ["/", "=", "-", "+", "!", "*", "|", "^", "~", "?", "."]
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.map({ "\\\($0)" }).joined()
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let operators = "\(escapedOperators)%<>&"
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let zeroOrManySpaces = "(\\s{0}|\\s{2,})"
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let pattern1 = "func\\s+[\(operators)]+\(zeroOrManySpaces)(<[A-Z]+>)?\\("
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let pattern2 = "func\(zeroOrManySpaces)[\(operators)]+\\s+(<[A-Z]+>)?\\("
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return file.match(pattern: "(\(pattern1)|\(pattern2))").filter { _, syntaxKinds in
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return syntaxKinds.first == .keyword
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}.map { range, _ in
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return StyleViolation(ruleDescription: type(of: self).description,
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severity: configuration.severity,
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location: Location(file: file, characterOffset: range.location))
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}
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}
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}
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