include/swift/AST/DefaultArgumentKind.h

//===--- DefaultArgumentKind.h - Default Argument Kind Enum -----*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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
//
//===----------------------------------------------------------------------===//
//
// This file defines the DefaultArgumentKind enumeration.
//
//===----------------------------------------------------------------------===//

#ifndef SWIFT_DEFAULTARGUMENTKIND_H
#define SWIFT_DEFAULTARGUMENTKIND_H

#include <cstdint>

namespace llvm {
class StringRef;
}

namespace swift {

class Expr;

/// Describes the kind of default argument a tuple pattern element has.
enum class DefaultArgumentKind : uint8_t {
  /// No default argument.
  None,
  /// A normal default argument.
  Normal,
  /// The default argument is inherited from the corresponding argument of the
  /// overridden declaration.
  Inherited,
  /// The #file default argument, which is expanded at the call site.
  File,
  /// The #line default argument, which is expanded at the call site.
  Line,
  /// The #column default argument, which is expanded at the call site.
  Column,
  /// The #function default argument, which is expanded at the call site.
  Function,
  /// The #dsohandle default argument, which is expanded at the call site.
  DSOHandle,
  /// The "nil" literal.
  NilLiteral,
  /// An empty array literal.
  EmptyArray,
  /// An empty dictionary literal.
  EmptyDictionary,
  /// A reference to the stored property. This is a special default argument
  /// kind for the synthesized memberwise constructor to emit a call to the
  // property's initializer.
  StoredProperty,
};
enum { NumDefaultArgumentKindBits = 4 };

} // end namespace swift

#endif // LLVM_SWIFT_DEFAULTARGUMENTKIND_H