Argument

import _RegexParser

struct PCRE

A PCRE callout written (?C...)

struct AST

A regex abstract syntax tree.

struct Atom

enum Callout

case number(AST.Atom.Number)

case string(String)

init(_ arg: Source.Located<AST.Atom.Callout.PCRE.Argument>)

var arg: Source.Located<AST.Atom.Callout.PCRE.Argument>

var isImplicit: Bool { get }

Whether the argument isn’t written explicitly in the source, e.g (?C) which is implicitly (?C0).

protocol Equatable

A type that can be compared for value equality.

protocol Hashable : Equatable

A type that can be hashed into a Hasher to produce an integer hash value.

static func != (lhs: Self, rhs: Self) -> Bool

Returns a Boolean value indicating whether two values are not equal.