# RegexComponent A type that represents a regular expression. ``` protocol RegexComponent ``` ## Overview You can use types that conform to `RegexComponent` as parameters to string searching operations and inside `RegexBuilder` closures. ## Topics ### Creating a regex component [`init(_:_:)`](/documentation/Swift/RegexComponent/init(_:_:)) Creates a character class that combines the given classes in a union. ### Getting a regex from a component [`regex`](/documentation/Swift/RegexComponent/regex) The regular expression represented by this component. ### Matching substring sequences [`anyOf(_:)`](/documentation/Swift/RegexComponent/anyOf(_:)-3pexl) Returns a character class that matches any Unicode scalar in the given sequence. [`anyOf(_:)`](/documentation/Swift/RegexComponent/anyOf(_:)-4xgea) Returns a character class that matches any character in the given string or sequence. [`any`](/documentation/Swift/RegexComponent/any) A character class that matches any element. [`anyGraphemeCluster`](/documentation/Swift/RegexComponent/anyGraphemeCluster) A character class that matches any single `Character`, or extended grapheme cluster, regardless of the current semantic level. [`anyNonNewline`](/documentation/Swift/RegexComponent/anyNonNewline) A character class that matches any element that isn’t a newline. [`digit`](/documentation/Swift/RegexComponent/digit) A character class that matches any digit. [`hexDigit`](/documentation/Swift/RegexComponent/hexDigit) A character class that matches any hexadecimal digit. [`word`](/documentation/Swift/RegexComponent/word) A character class that matches any element that is a “word character”. ### Matching whitespace and line endings [`horizontalWhitespace`](/documentation/Swift/RegexComponent/horizontalWhitespace) A character class that matches any element that is classified as horizontal whitespace. [`newlineSequence`](/documentation/Swift/RegexComponent/newlineSequence) A character class that matches any newline sequence. [`verticalWhitespace`](/documentation/Swift/RegexComponent/verticalWhitespace) A character class that matches any element that is classified as vertical whitespace. [`whitespace`](/documentation/Swift/RegexComponent/whitespace) A character class that matches any element that is classified as whitespace. ### Matching dates and times [`date(_:locale:timeZone:calendar:)`](/documentation/Swift/RegexComponent/date(_:locale:timeZone:calendar:)) Creates a regex component that matches a localized date string formatted in accordance with a style, capturing it as a Foundation date. [`date(format:locale:timeZone:calendar:twoDigitStartDate:)`](/documentation/Swift/RegexComponent/date(format:locale:timeZone:calendar:twoDigitStartDate:)) Creates a regex component that matches a localized date string formatted in accordance with a format string, capturing it as a Foundation date. [`dateTime(date:time:locale:timeZone:calendar:)`](/documentation/Swift/RegexComponent/dateTime(date:time:locale:timeZone:calendar:)) Creates a regex component that matches a localized date and time string, capturing it as a Foundation date. [`iso8601`](/documentation/Swift/RegexComponent/iso8601) A regex component that matches a default ISO 8601-formatted date string, capturing it as a Foundation date. [`iso8601Date(timeZone:dateSeparator:)`](/documentation/Swift/RegexComponent/iso8601Date(timeZone:dateSeparator:)) Creates a regex component that matches an ISO 8601-formatted date string, capturing it as a Foundation date in the specified time zone. [`iso8601(timeZone:includingFractionalSeconds:dateSeparator:dateTimeSeparator:timeSeparator:)`](/documentation/Swift/RegexComponent/iso8601(timeZone:includingFractionalSeconds:dateSeparator:dateTimeSeparator:timeSeparator:)) Creates a regex component that matches an ISO 8601-formatted date string, capturing the matched substring as a Foundation date in the specified time zone. [`iso8601WithTimeZone(includingFractionalSeconds:dateSeparator:dateTimeSeparator:timeSeparator:timeZoneSeparator:)`](/documentation/Swift/RegexComponent/iso8601WithTimeZone(includingFractionalSeconds:dateSeparator:dateTimeSeparator:timeSeparator:timeZoneSeparator:)) Creates a regex component that matches an ISO 8601-formatted date string that includes a time zone component, capturing the matched substring as a Foundation date. ### Matching numeric formats [`localizedInteger(locale:)`](/documentation/Swift/RegexComponent/localizedInteger(locale:)) Creates a regex component that matches a localized numeric string, capturing it as an integer value. [`localizedDouble(locale:)`](/documentation/Swift/RegexComponent/localizedDouble(locale:)) Creates a regex component that matches a localized numeric string, capturing it as a double-precision floating-point value. [`localizedDecimal(locale:)`](/documentation/Swift/RegexComponent/localizedDecimal(locale:)) Creates a regex component that matches a localized decimal string, capturing it as a Foundation decimal. [`localizedCurrency(code:locale:)`](/documentation/Swift/RegexComponent/localizedCurrency(code:locale:)) Creates a regex component that matches a localized currency string, capturing it as a decimal value. [`localizedIntegerCurrency(code:locale:)`](/documentation/Swift/RegexComponent/localizedIntegerCurrency(code:locale:)) Creates a regex component that matches a localized currency string, capturing it as an integer value. [`localizedIntegerPercentage(locale:)`](/documentation/Swift/RegexComponent/localizedIntegerPercentage(locale:)) Creates a regex component that matches a localized percentage string, capturing it as a double-precision floating-point value. [`localizedDoublePercentage(locale:)`](/documentation/Swift/RegexComponent/localizedDoublePercentage(locale:)) Creates a regex component that matches a localized percentage string, capturing it as a double-precision floating-point value. ### Matching URLs [`url(scheme:user:password:host:port:path:query:fragment:)`](/documentation/Swift/RegexComponent/url(scheme:user:password:host:port:path:query:fragment:)) Creates a regex component that matches a URL substring, capturing it as a Foundation URL. ### Supporting types [`RegexOutput`](/documentation/Swift/RegexComponent/RegexOutput) The output type for this regular expression. [`RegexComponent.DateStyle`](/documentation/Swift/RegexComponent/DateStyle) A type alias to use when matching date components in a regular expression. [`RegexComponent.TimeStyle`](/documentation/Swift/RegexComponent/TimeStyle) A type alias to use when matching time components in a regular expression. --- Copyright © 2026 Apple Inc. 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