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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 Foundation
// MARK: - Add Blocker
/// Macro that produces a warning on "+" operators within the expression, and
/// suggests changing them to "-".
@freestanding(expression)
public macro addBlocker<T>(_ value: T) -> T = #externalMacro(module: "MacroExamplesImplementation", type: "AddBlocker")
// MARK: - Font Literal
public enum FontWeight {
case thin
case normal
case medium
case semiBold
case bold
}
public protocol ExpressibleByFontLiteral {
init(fontLiteralName: String, size: Int, weight: FontWeight)
}
/// Font literal similar to, e.g., #colorLiteral.
@freestanding(expression)
public macro fontLiteral<T>(name: String, size: Int, weight: FontWeight) -> T =
#externalMacro(
module: "MacroExamplesImplementation",
type: "FontLiteralMacro"
) where T: ExpressibleByFontLiteral
// MARK: - Stringify Macro
/// "Stringify" the provided value and produce a tuple that includes both the
/// original value as well as the source code that generated it.
@freestanding(expression)
public macro stringify<T>(_ value: T) -> (T, String) =
#externalMacro(module: "MacroExamplesImplementation", type: "StringifyMacro")
// MARK: - URL
/// Check if provided string literal is a valid URL and produce a non-optional
/// URL value. Emit error otherwise.
@freestanding(expression)
public macro URL(_ stringLiteral: String) -> URL =
#externalMacro(module: "MacroExamplesImplementation", type: "URLMacro")
// MARK: - Warning
/// Macro that produces a warning, as a replacement for the built-in
/// #warning("...").
@freestanding(expression)
public macro myWarning(_ message: String) = #externalMacro(module: "MacroExamplesImplementation", type: "WarningMacro")
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