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//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for Swift project authors
//
import SwiftSyntax
extension DeclGroupSyntax {
/// The type declared or extended by this instance.
var type: TypeSyntax {
if let namedDecl = asProtocol((any NamedDeclSyntax).self) {
return TypeSyntax(IdentifierTypeSyntax(name: namedDecl.name))
} else if let extensionDecl = `as`(ExtensionDeclSyntax.self) {
return extensionDecl.extendedType
}
fatalError("Unexpected DeclGroupSyntax type \(Swift.type(of: self)). Please file a bug report at https://github.com/swiftlang/swift-testing/issues/new")
}
/// Check whether or not this instance includes a given type name in its
/// inheritance clause.
///
/// - Parameters:
/// - typeName: The name of the possible parent type.
/// - moduleName: The name of the module the specified type is declared in.
///
/// - Returns: Whether or not the represented type inherits from the specified
/// type. If the represented type inherits _indirectly_ from that type, or
/// inherits via another declaration group (such as an `extension`), this
/// function is unable to detect it and will return `false.`
func inherits(fromTypeNamed typeName: String, inModuleNamed moduleName: String) -> Bool {
if let inherited = inheritanceClause?.inheritedTypes {
return inherited.lazy
.map(\.type)
.contains { $0.isNamed(typeName, inModuleNamed: moduleName) }
}
return false
}
}
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