include/swift/Syntax/SyntaxVisitor.h.gyb

%{
  # -*- mode: C++ -*-
  from gyb_syntax_support import *
  NODE_MAP = create_node_map()
  # Ignore the following admonition; it applies to the resulting .h file only
}%
//// Automatically Generated From SyntaxVisitor.h.gyb.
//// Do Not Edit Directly!
//===---------------- SyntaxVisitor.h - SyntaxVisitor definitions ---------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef SWIFT_SYNTAX_VISITOR_H
#define SWIFT_SYNTAX_VISITOR_H

#include "swift/Syntax/Syntax.h"
#include "swift/Syntax/SyntaxCollection.h"
#include "swift/Syntax/TokenSyntax.h"
#include "swift/Syntax/UnknownSyntax.h"
#include "swift/Syntax/SyntaxNodes.h"

namespace swift {
namespace syntax {
struct SyntaxVisitor {
  virtual ~SyntaxVisitor() {}

% for node in SYNTAX_NODES:
%   if is_visitable(node):
  virtual void visit(${node.name} node);
%   end
% end

  virtual void visit(TokenSyntax token) {}

  virtual void visitPre(Syntax node) {}
  virtual void visitPost(Syntax node) {}
  virtual void visit(Syntax node);

  void visitChildren(Syntax node) {
    for (unsigned i = 0, e = node.getNumChildren(); i != e; ++i) {
      if (auto Child = node.getChild(i))
        visit(*Child);
    }
  }
};
}
}

#endif // SWIFT_SYNTAX_VISITOR_H