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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift Collections open source project
//
// Copyright (c) 2021 - 2024 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
//
//===----------------------------------------------------------------------===//
#if !COLLECTIONS_SINGLE_MODULE
import InternalCollectionsUtilities
#endif
extension BitSet {
/// Returns a new bit set with the elements that are either in this set or in
/// `other`, but not in both.
///
/// let set: BitSet = [1, 2, 3, 4]
/// let other: BitSet = [6, 4, 2, 0]
/// set.symmetricDifference(other) // [0, 1, 3, 6]
///
/// - Parameter other: Another set.
///
/// - Returns: A new set.
///
/// - Complexity: O(*max*), where *max* is the largest item in either set.
public func symmetricDifference(_ other: Self) -> Self {
self._read { first in
other._read { second in
Self(
_combining: (first, second),
includingTail: true,
using: { $0.symmetricDifference($1) })
}
}
}
/// Returns a new bit set with the elements that are either in this set or in
/// `other`, but not in both.
///
/// let set: BitSet = [1, 2, 3, 4]
/// let other: BitSet.Counted = [6, 4, 2, 0]
/// set.symmetricDifference(other) // [0, 1, 3, 6]
///
/// - Parameter other: Another set.
///
/// - Returns: A new set.
///
/// - Complexity: O(*max*), where *max* is the largest item in either set.
public func symmetricDifference(_ other: Counted) -> Self {
symmetricDifference(other._bits)
}
/// Returns a new bit set with the elements that are either in this set or in
/// `other`, but not in both.
///
/// let set: BitSet = [1, 2, 3, 4]
/// set.formSymmetricDifference(3 ..< 7) // [1, 2, 5, 6]
///
/// - Parameter other: A range of nonnegative integers.
///
/// - Returns: A new set.
///
/// - Complexity: O(*max*), where *max* is the largest item in either input.
public func symmetricDifference(_ other: Range<Int>) -> Self {
var result = self
result.formSymmetricDifference(other)
return result
}
/// Returns a new bit set with the elements that are either in this set or in
/// `other`, but not in both.
///
/// let set: BitSet = [1, 2, 3, 4]
/// let other = [6, 4, 2, 0, 2, 0]
/// set.formSymmetricDifference(other) // [0, 1, 3, 6]
///
/// - Parameter other: A sequence of nonnegative integers.
///
/// - Complexity: O(*max*) + *k*, where *max* is the largest item in either
/// input, and *k* is the complexity of iterating over all elements in
/// `other`.
@inlinable
public func symmetricDifference(
_ other: __owned some Sequence<Int>
) -> Self {
if let other = _specialize(other, for: Range<Int>.self) {
return symmetricDifference(other)
}
// Note: BitSet & BitSet.Counted are handled in the BitSet initializer below
return symmetricDifference(BitSet(other))
}
}
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