55 lines
1.6 KiB
Swift
55 lines
1.6 KiB
Swift
//
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// String.swift
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// Example
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//
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// Copyright 2021 Twitter, Inc.
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// SPDX-License-Identifier: Apache-2.0
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//
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import Foundation
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extension String {
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@inlinable
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public var length: Int {
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(self as NSString).length
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}
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@inlinable
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public func substring(with range: NSRange) -> String {
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(self as NSString).substring(with: range)
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}
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public func substring(with result: NSTextCheckingResult, at index: Int) -> String? {
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guard index < result.numberOfRanges else {
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return nil
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}
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let range = result.range(at: index)
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guard range.location != NSNotFound else {
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return nil
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}
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return substring(with: result.range(at: index))
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}
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public func firstMatch(pattern: String,
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options: NSRegularExpression.Options = [],
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range: NSRange? = nil) -> NSTextCheckingResult?
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{
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guard let regularExpression = try? NSRegularExpression(pattern: pattern, options: options) else {
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return nil
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}
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let range = range ?? NSRange(location: 0, length: length)
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return regularExpression.firstMatch(in: self, options: [], range: range)
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}
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public func matches(pattern: String,
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options: NSRegularExpression.Options = [],
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range: NSRange? = nil) -> [NSTextCheckingResult]
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{
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guard let regularExpression = try? NSRegularExpression(pattern: pattern, options: options) else {
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return []
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}
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let range = range ?? NSRange(location: 0, length: length)
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return regularExpression.matches(in: self, options: [], range: range)
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}
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}
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