66 lines
1.8 KiB
Swift
66 lines
1.8 KiB
Swift
import SwiftSyntax
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struct FatalErrorMessageRule: SwiftSyntaxRule, ConfigurationProviderRule, OptInRule {
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var configuration = SeverityConfiguration(.warning)
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init() {}
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static let description = RuleDescription(
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identifier: "fatal_error_message",
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name: "Fatal Error Message",
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description: "A fatalError call should have a message.",
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kind: .idiomatic,
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nonTriggeringExamples: [
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Example("""
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func foo() {
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fatalError("Foo")
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}
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"""),
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Example("""
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func foo() {
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fatalError(x)
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}
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""")
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],
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triggeringExamples: [
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Example("""
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func foo() {
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↓fatalError("")
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}
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"""),
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Example("""
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func foo() {
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↓fatalError()
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}
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""")
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]
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)
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func makeVisitor(file: SwiftLintFile) -> ViolationsSyntaxVisitor {
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Visitor(viewMode: .sourceAccurate)
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}
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}
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private extension FatalErrorMessageRule {
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final class Visitor: ViolationsSyntaxVisitor {
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override func visitPost(_ node: FunctionCallExprSyntax) {
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guard let expression = node.calledExpression.as(IdentifierExprSyntax.self),
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expression.identifier.withoutTrivia().text == "fatalError",
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node.argumentList.isEmptyOrEmptyString else {
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return
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}
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violations.append(node.positionAfterSkippingLeadingTrivia)
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}
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}
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}
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private extension TupleExprElementListSyntax {
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var isEmptyOrEmptyString: Bool {
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if isEmpty {
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return true
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}
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return count == 1 && first?.expression.as(StringLiteralExprSyntax.self)?.isEmptyString == true
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}
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}
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