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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2021-2022 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
//
//===----------------------------------------------------------------------===//
// This type is used to manipulate DSLTree.Nodes in RegexBuilder for AEIC
// marked functions. We explicitly don't want to expose DSLTree.Node as public
// in any form (SPI or not), so this lets us create the needed Regex's in the
// builder module.
@available(SwiftStdlib 5.7, *)
public struct _RegexFactory {
// Don't allow people to create this type if they somehow manage to find this.
// Hide is behind an SPI that only RegexBuilder can use.
@_spi(RegexBuilder)
public init() {}
@available(SwiftStdlib 5.9, *)
public func ignoreCapturesInTypedOutput(
_ child: some RegexComponent
) -> Regex<Substring> {
// Don't wrap `child` again if it's a leaf node.
child.regex.root.hasChildNodes
? .init(node: .ignoreCapturesInTypedOutput(child.regex.root))
: .init(node: child.regex.root)
}
@available(SwiftStdlib 5.7, *)
public func accumulate<Output>(
_ left: some RegexComponent,
_ right: some RegexComponent
) -> Regex<Output> {
.init(node: left.regex.root.appending(right.regex.root))
}
@available(SwiftStdlib 5.7, *)
public func accumulateAlternation<Output>(
_ left: some RegexComponent,
_ right: some RegexComponent
) -> Regex<Output> {
.init(node: left.regex.root.appendingAlternationCase(right.regex.root))
}
@_spi(RegexBuilder)
@available(SwiftStdlib 5.7, *)
public func assertion<Output>(
_ kind: DSLTree.Atom.Assertion
) -> Regex<Output> {
.init(node: .atom(.assertion(kind)))
}
@_spi(RegexBuilder)
@available(SwiftStdlib 5.7, *)
public func empty<Output>() -> Regex<Output> {
.init(node: .empty)
}
@_spi(RegexBuilder)
@available(SwiftStdlib 5.7, *)
public func scalar<Output>(
_ scalar: Unicode.Scalar
) -> Regex<Output> {
.init(node: .atom(.scalar(scalar)))
}
@_spi(RegexBuilder)
@available(SwiftStdlib 5.7, *)
public func characterClass<Output>(
_ cc: DSLTree.Atom.CharacterClass
) -> Regex<Output> {
.init(node: .atom(.characterClass(cc)))
}
@_spi(RegexBuilder)
@available(SwiftStdlib 5.7, *)
public func char<Output>(
_ char: Character
) -> Regex<Output> {
.init(node: .atom(.char(char)))
}
@_spi(RegexBuilder)
@available(SwiftStdlib 5.7, *)
public func symbolicReference<Output>(
_ reference: ReferenceID
) -> Regex<Output> {
.init(node: .atom(.symbolicReference(reference)))
}
@_spi(RegexBuilder)
@available(SwiftStdlib 5.7, *)
public func customCharacterClass<Output>(
_ ccc: DSLTree.CustomCharacterClass
) -> Regex<Output> {
.init(node: .customCharacterClass(ccc))
}
@available(SwiftStdlib 5.7, *)
public func zeroOrOne<Output>(
_ component: some RegexComponent,
_ behavior: RegexRepetitionBehavior? = nil
) -> Regex<Output> {
let kind: DSLTree.QuantificationKind = behavior.map { .explicit($0.dslTreeKind) } ?? .default
return .init(node: .quantification(.zeroOrOne, kind, component.regex.root))
}
@available(SwiftStdlib 5.7, *)
public func zeroOrMore<Output>(
_ component: some RegexComponent,
_ behavior: RegexRepetitionBehavior? = nil
) -> Regex<Output> {
let kind: DSLTree.QuantificationKind = behavior.map { .explicit($0.dslTreeKind) } ?? .default
return .init(node: .quantification(.zeroOrMore, kind, component.regex.root))
}
@available(SwiftStdlib 5.7, *)
public func oneOrMore<Output>(
_ component: some RegexComponent,
_ behavior: RegexRepetitionBehavior? = nil
) -> Regex<Output> {
let kind: DSLTree.QuantificationKind = behavior.map { .explicit($0.dslTreeKind) } ?? .default
return .init(node: .quantification(.oneOrMore, kind, component.regex.root))
}
@available(SwiftStdlib 5.7, *)
public func exactly<Output>(
_ count: Int,
_ component: some RegexComponent
) -> Regex<Output> {
.init(node: .quantification(.exactly(count), .default, component.regex.root))
}
@available(SwiftStdlib 5.7, *)
public func repeating<Output>(
_ range: Range<Int>,
_ behavior: RegexRepetitionBehavior?,
_ component: some RegexComponent
) -> Regex<Output> {
.init(node: .repeating(range, behavior, component.regex.root))
}
@available(SwiftStdlib 5.7, *)
public func atomicNonCapturing<Output>(
_ component: some RegexComponent
) -> Regex<Output> {
.init(node: .nonCapturingGroup(.atomicNonCapturing, component.regex.root))
}
@_spi(RegexBuilder)
@available(SwiftStdlib 5.7, *)
public func lookaheadNonCapturing<Output>(
_ component: some RegexComponent
) -> Regex<Output> {
.init(node: .nonCapturingGroup(.lookahead, component.regex.root))
}
@_spi(RegexBuilder)
@available(SwiftStdlib 5.7, *)
public func negativeLookaheadNonCapturing<Output>(
_ component: some RegexComponent
) -> Regex<Output> {
.init(node: .nonCapturingGroup(.negativeLookahead, component.regex.root))
}
@available(SwiftStdlib 5.7, *)
public func orderedChoice<Output>(
_ component: some RegexComponent
) -> Regex<Output> {
.init(node: .orderedChoice([component.regex.root]))
}
@available(SwiftStdlib 5.7, *)
public func capture<Output>(
_ r: some RegexComponent
) -> Regex<Output> {
.init(node: .capture(r.regex.root))
}
@available(SwiftStdlib 5.7, *)
public func capture<Output>(
_ component: some RegexComponent,
_ reference: Int
) -> Regex<Output> {
.init(node: .capture(
reference: ReferenceID(reference),
component.regex.root
))
}
@available(SwiftStdlib 5.7, *)
public func capture<Output, W, NewCapture>(
_ component: some RegexComponent,
_ reference: Int? = nil,
_ transform: @escaping (W) throws -> NewCapture
) -> Regex<Output> {
.init(node: .capture(
reference: reference.map { ReferenceID($0) },
component.regex.root,
CaptureTransform(transform)
))
}
@available(SwiftStdlib 5.7, *)
public func captureOptional<Output, W, NewCapture>(
_ component: some RegexComponent,
_ reference: Int? = nil,
_ transform: @escaping (W) throws -> NewCapture?
) -> Regex<Output> {
.init(node: .capture(
reference: reference.map { ReferenceID($0) },
component.regex.root,
CaptureTransform(transform)
))
}
}
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