// StringProtocolExtensions.swift - Copyright 2024 SwifterSwift
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import Foundation
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public extension StringProtocol {
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/// SwifterSwift: The longest common suffix.
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///
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/// "Hello world!".commonSuffix(with: "It's cold!") = "ld!"
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///
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/// - Parameters:
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/// - Parameter aString: The string with which to compare the receiver.
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/// - Parameter options: Options for the comparison.
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/// - Returns: The longest common suffix of the receiver and the given String.
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func commonSuffix(with aString: some StringProtocol, options: String.CompareOptions = []) -> String {
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return String(zip(reversed(), aString.reversed())
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.lazy
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.prefix(while: { (lhs: Character, rhs: Character) in
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String(lhs).compare(String(rhs), options: options) == .orderedSame
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})
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.map { (lhs: Character, _: Character) in lhs }
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.reversed())
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}
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#if canImport(Foundation)
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/// SwifterSwift: Returns a new string in which all occurrences of a regex pattern in a specified range of the
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/// receiver are replaced by the template.
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/// - Parameters:
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/// - pattern: Regex pattern to replace.
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/// - template: The regex template to replace the pattern.
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/// - options: Options to use when matching the regex. Only .regularExpression, .anchored .and caseInsensitive are
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/// supported.
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/// - searchRange: The range in the receiver in which to search.
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/// - Returns: A new string in which all occurrences of regex pattern in searchRange of the receiver are replaced by
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/// template.
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func replacingOccurrences(
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ofPattern pattern: some StringProtocol,
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withTemplate template: some StringProtocol,
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options: String.CompareOptions = [.regularExpression],
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range searchRange: Range<Self.Index>? = nil) -> String {
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assert(
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options.isStrictSubset(of: [.regularExpression, .anchored, .caseInsensitive]),
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"Invalid options for regular expression replacement")
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return replacingOccurrences(
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of: pattern,
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with: template,
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options: options.union(.regularExpression),
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range: searchRange)
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}
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#endif
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}
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