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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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 the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#if !FOUNDATION_FRAMEWORK
@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
extension StringProtocol {
/// Compares the string using the specified options and
/// returns the lexical ordering for the range.
package func compare<T : StringProtocol>(_ aString: T, options mask: String.CompareOptions = [], range: Range<Index>? = nil) -> ComparisonResult {
// TODO: This method is modified from `public func compare<T : StringProtocol>(_ aString: T, options mask: String.CompareOptions = [], range: Range<Index>? = nil, locale: Locale? = nil) -> ComparisonResult`. Move that method here once `Locale` can be staged in `FoundationEssentials`.
var substr = Substring(self)
if let range {
substr = substr[range]
}
return substr._unlocalizedCompare(other: Substring(aString), options: mask)
}
}
#endif // !FOUNDATION_FRAMEWORK
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