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82 lines
2.4 KiB
Swift
82 lines
2.4 KiB
Swift
//===--- FlagSpec.swift ---------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2024 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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extension Command {
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public struct FlagSpec: Sendable {
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public let flags: [Element]
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public init(_ flags: [Element]) {
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// Sort by shortest first, except in cases where one is a prefix of
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// another, in which case we need the longer one first to ensure we prefer
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// it when parsing.
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self.flags = flags.sorted(by: { lhs, rhs in
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let lhs = lhs.flag.name.rawValue
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let rhs = rhs.flag.name.rawValue
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guard lhs.count != rhs.count else {
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return false
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}
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if lhs.count < rhs.count {
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// RHS should be ordered first if it has LHS as a prefix.
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return !rhs.hasPrefix(lhs)
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} else {
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// LHS should be ordered first if it has RHS as a prefix.
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return lhs.hasPrefix(rhs)
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}
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})
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}
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}
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}
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extension Command {
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public struct OptionSpacingSpec: OptionSet, Sendable {
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public var rawValue: Int
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public init(rawValue: Int) {
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self.rawValue = rawValue
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}
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public init(_ rawValue: Int) {
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self.rawValue = rawValue
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}
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public init(_ optionSpacing: OptionSpacing) {
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switch optionSpacing {
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case .equals:
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self = .equals
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case .unspaced:
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self = .unspaced
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case .spaced:
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self = .spaced
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}
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}
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public static let equals = Self(1 << 0)
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public static let unspaced = Self(1 << 1)
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public static let spaced = Self(1 << 2)
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}
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}
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public extension Command.FlagSpec {
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typealias Flag = Command.Flag
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typealias OptionSpacingSpec = Command.OptionSpacingSpec
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struct Element: Sendable {
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public let flag: Flag
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public let spacing: OptionSpacingSpec
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public init(_ flag: Flag, option: [OptionSpacingSpec]) {
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self.flag = flag
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self.spacing = option.reduce([], { $0.union($1) })
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}
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public init(_ flag: Flag, option: OptionSpacingSpec...) {
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self.init(flag, option: option)
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}
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}
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}
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