//===--- ASTNode.h - Swift Language ASTs ------------------------*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// This file defines the ASTNode, which is a union of Stmt, Expr, and Decl.
//
//===----------------------------------------------------------------------===//

#ifndef SWIFT_AST_AST_NODE_H
#define SWIFT_AST_AST_NODE_H

#include "llvm/ADT/PointerUnion.h"
#include "swift/AST/TypeAlignments.h"

namespace swift {
  class Expr;
  class Stmt;
  class Decl;
  class SourceLoc;
  class SourceRange;
  
  struct ASTNode : public llvm::PointerUnion3<Expr*, Stmt*, Decl*> {
    // Inherit the constructors from PointerUnion.
    using PointerUnion3::PointerUnion3;
    
    SourceRange getSourceRange() const;

    /// \brief Return the location of the start of the statement.
    SourceLoc getStartLoc() const;
  
    /// \brief Return the location of the end of the statement.
    SourceLoc getEndLoc() const;
  };
  
} // namespace swift

#endif // LLVM_SWIFT_AST_AST_NODE_H