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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 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
//
//===----------------------------------------------------------------------===//
extension AST {
public struct Conditional: Hashable, _ASTNode {
public var location: SourceLocation
public var condition: Condition
public var trueBranch: AST.Node
public var pipe: SourceLocation?
public var falseBranch: AST.Node
public init(
_ condition: Condition, trueBranch: AST.Node, pipe: SourceLocation?,
falseBranch: AST.Node, _ location: SourceLocation
) {
self.location = location
self.condition = condition
self.trueBranch = trueBranch
self.pipe = pipe
self.falseBranch = falseBranch
}
}
}
extension AST.Conditional {
public struct Condition: Hashable {
public enum Kind: Hashable {
/// Check to see if a certain group was matched.
case groupMatched(AST.Reference)
// Check for recursion.
case recursionCheck
case groupRecursionCheck(AST.Reference)
/// Define a new group that can be referenced elsewhere.
case defineGroup
/// A PCRE version check.
case pcreVersionCheck(PCREVersionCheck)
/// A group condition, which checks to see if an arbitrary bit of regex
/// matches. Note that the semantics of this differs by engine, .NET only
/// treats it as a lookahead, whereas Oniguruma can evaluate separately
/// from the body of the conditional.
case group(AST.Group)
}
public var kind: Kind
public var location: SourceLocation
public init(_ kind: Kind, _ location: SourceLocation) {
self.kind = kind
self.location = location
}
}
}
extension AST.Conditional.Condition {
public struct PCREVersionNumber: Hashable {
public var major: AST.Atom.Number
public var minor: AST.Atom.Number
public var location: SourceLocation
public init(
major: AST.Atom.Number, minor: AST.Atom.Number, _ location: SourceLocation
) {
self.major = major
self.minor = minor
self.location = location
}
}
public struct PCREVersionCheck: Hashable {
public enum Kind: Hashable {
case equal, greaterThanOrEqual
}
public var kind: AST.Located<Kind>
public var num: PCREVersionNumber
public init(_ kind: AST.Located<Kind>, _ num: PCREVersionNumber) {
self.kind = kind
self.num = num
}
}
}
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