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