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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 set with the elements of both this and the given set.
///
/// let set: BitSet = [1, 2, 3, 4]
/// let other: BitSet = [0, 2, 4, 6]
/// set.union(other) // [0, 1, 2, 3, 4, 6]
///
/// - Parameter other: The set of elements to insert.
///
/// - Complexity: O(*max*), where *max* is the largest item in either input.
public func union(_ other: Self) -> Self {
self._read { first in
other._read { second in
Self(
_combining: (first, second),
includingTail: true,
using: { $0.union($1) })
}
}
}
/// Returns a new set with the elements of both this and the given set.
///
/// let set: BitSet = [1, 2, 3, 4]
/// let other: BitSet = [0, 2, 4, 6]
/// set.union(other) // [0, 1, 2, 3, 4, 6]
///
/// - Parameter other: The set of elements to insert.
///
/// - Complexity: O(*max*), where *max* is the largest item in either input.
public func union(_ other: BitSet.Counted) -> Self {
union(other._bits)
}
/// Returns a new set with the elements of both this set and the given
/// range of integers.
///
/// let set: BitSet = [1, 2, 3, 4]
/// set.union(3 ..< 7) // [1, 2, 3, 4, 5, 6]
///
/// - Parameter other: A range of nonnegative integers.
///
/// - Complexity: O(*max*), where *max* is the largest item in either input.
public func union(_ other: Range<Int>) -> Self {
var result = self
result.formUnion(other)
return result
}
/// Returns a new set with the elements of both this set and the given
/// sequence of integers.
///
/// let set: BitSet = [1, 2, 3, 4]
/// let other = [6, 4, 2, 0, 2, 0]
/// set.union(other) // [0, 1, 2, 3, 4, 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 union(_ other: __owned some Sequence<Int>) -> Self {
if let other = _specialize(other, for: BitSet.self) {
return union(other)
}
if let other = _specialize(other, for: BitSet.Counted.self) {
return union(other)
}
if let other = _specialize(other, for: Range<Int>.self) {
return union(other)
}
var result = self
result.formUnion(other)
return result
}
}
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