FN_multi_function_context.hh

Go to the documentation of this file.

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
 
#pragma once
 
#include "BLI_utildefines.h"
 
#include "BLI_map.hh"
 
namespace blender::fn {
 
class MFContext;
 
class MFContextBuilder {
 private:
  Map<std::string, const void *> global_contexts_;
 
  friend MFContext;
 
 public:
  template<typename T> void add_global_context(std::string name, const T *context)
  {
    global_contexts_.add_new(std::move(name), static_cast<const void *>(context));
  }
};
 
class MFContext {
 private:
  MFContextBuilder &builder_;
 
 public:
  MFContext(MFContextBuilder &builder) : builder_(builder)
  {
  }
 
  template<typename T> const T *get_global_context(StringRef name) const
  {
    const void *context = builder_.global_contexts_.lookup_default_as(name, nullptr);
    /* TODO: Implement type checking. */
    return static_cast<const T *>(context);
  }
};
 
}  // namespace blender::fn