FN_multi_function_data_type.hh

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/*
 * 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 "FN_cpp_type.hh"
 
namespace blender::fn {
 
class MFDataType {
 public:
  enum Category {
    Single,
    Vector,
  };
 
 private:
  Category category_;
  const CPPType *type_;
 
  MFDataType(Category category, const CPPType &type) : category_(category), type_(&type)
  {
  }
 
 public:
  MFDataType() = default;
 
  static MFDataType ForSingle(const CPPType &type)
  {
    return MFDataType(Single, type);
  }
 
  static MFDataType ForVector(const CPPType &type)
  {
    return MFDataType(Vector, type);
  }
 
  template<typename T> static MFDataType ForSingle()
  {
    return MFDataType::ForSingle(CPPType::get<T>());
  }
 
  template<typename T> static MFDataType ForVector()
  {
    return MFDataType::ForVector(CPPType::get<T>());
  }
 
  bool is_single() const
  {
    return category_ == Single;
  }
 
  bool is_vector() const
  {
    return category_ == Vector;
  }
 
  Category category() const
  {
    return category_;
  }
 
  const CPPType &single_type() const
  {
    BLI_assert(this->is_single());
    return *type_;
  }
 
  const CPPType &vector_base_type() const
  {
    BLI_assert(this->is_vector());
    return *type_;
  }
 
  friend bool operator==(const MFDataType &a, const MFDataType &b);
  friend bool operator!=(const MFDataType &a, const MFDataType &b);
 
  std::string to_string() const
  {
    switch (category_) {
      case Single:
        return type_->name();
      case Vector:
        return type_->name() + " Vector";
    }
    BLI_assert(false);
    return "";
  }
 
  uint64_t hash() const
  {
    return get_default_hash_2(*type_, category_);
  }
};
 
inline bool operator==(const MFDataType &a, const MFDataType &b)
{
  return a.category_ == b.category_ && a.type_ == b.type_;
}
 
inline bool operator!=(const MFDataType &a, const MFDataType &b)
{
  return !(a == b);
}
 
}  // namespace blender::fn