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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2023 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
//
//===----------------------------------------------------------------------===//
import SwiftSyntax
import SwiftSyntaxMacros
public enum CaseDetectionMacro: MemberMacro {
public static func expansion(
of node: AttributeSyntax,
providingMembersOf declaration: some DeclGroupSyntax,
in context: some MacroExpansionContext
) throws -> [DeclSyntax] {
declaration.memberBlock.members
.compactMap { $0.decl.as(EnumCaseDeclSyntax.self) }
.map { $0.elements.first!.name }
.map { ($0, $0.initialUppercased) }
.map { original, uppercased in
"""
var is\(raw: uppercased): Bool {
if case .\(raw: original) = self {
return true
}
return false
}
"""
}
}
}
extension TokenSyntax {
fileprivate var initialUppercased: String {
let name = self.text
guard let initial = name.first else {
return name
}
return "\(initial.uppercased())\(name.dropFirst())"
}
}
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