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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.
*/
#ifndef __FN_MULTI_FUNCTION_PARAM_TYPE_HH__
#define __FN_MULTI_FUNCTION_PARAM_TYPE_HH__
/** \file
* \ingroup fn
*
* A multi-function has an arbitrary amount of parameters. Every parameter belongs to one of three
* interface types:
* - Input: An input parameter is readonly inside the function. The values have to be provided by
* the caller.
* - Output: An output parameter has to be initialized by the function. However, the caller
* provides the memory where the data has to be constructed.
* - Mutable: A mutable parameter can be considered to be an input and output. The caller has to
* initialize the data, but the function is allowed to modify it.
*
* Furthermore, every parameter has a MFDataType that describes what kind of data is being passed
* around.
*/
#include "FN_multi_function_data_type.hh"
namespace blender {
namespace fn {
class MFParamType {
public:
enum InterfaceType {
Input,
Output,
Mutable,
};
enum Category {
SingleInput,
VectorInput,
SingleOutput,
VectorOutput,
SingleMutable,
VectorMutable,
};
private:
InterfaceType m_interface_type;
MFDataType m_data_type;
public:
MFParamType(InterfaceType interface_type, MFDataType data_type)
: m_interface_type(interface_type), m_data_type(data_type)
{
}
static MFParamType ForSingleInput(const CPPType &type)
{
return MFParamType(InterfaceType::Input, MFDataType::ForSingle(type));
}
static MFParamType ForVectorInput(const CPPType &base_type)
{
return MFParamType(InterfaceType::Input, MFDataType::ForVector(base_type));
}
static MFParamType ForSingleOutput(const CPPType &type)
{
return MFParamType(InterfaceType::Output, MFDataType::ForSingle(type));
}
static MFParamType ForVectorOutput(const CPPType &base_type)
{
return MFParamType(InterfaceType::Output, MFDataType::ForVector(base_type));
}
static MFParamType ForMutableSingle(const CPPType &type)
{
return MFParamType(InterfaceType::Mutable, MFDataType::ForSingle(type));
}
static MFParamType ForMutableVector(const CPPType &base_type)
{
return MFParamType(InterfaceType::Mutable, MFDataType::ForVector(base_type));
}
MFDataType data_type() const
{
return m_data_type;
}
InterfaceType interface_type() const
{
return m_interface_type;
}
Category category() const
{
switch (m_data_type.category()) {
case MFDataType::Single: {
switch (m_interface_type) {
case Input:
return SingleInput;
case Output:
return SingleOutput;
case Mutable:
return SingleMutable;
}
break;
}
case MFDataType::Vector: {
switch (m_interface_type) {
case Input:
return VectorInput;
case Output:
return VectorOutput;
case Mutable:
return VectorMutable;
}
break;
}
}
BLI_assert(false);
return SingleInput;
}
bool is_input_or_mutable() const
{
return ELEM(m_interface_type, Input, Mutable);
}
bool is_output_or_mutable() const
{
return ELEM(m_interface_type, Output, Mutable);
}
friend bool operator==(const MFParamType &a, const MFParamType &b);
friend bool operator!=(const MFParamType &a, const MFParamType &b);
};
inline bool operator==(const MFParamType &a, const MFParamType &b)
{
return a.m_interface_type == b.m_interface_type && a.m_data_type == b.m_data_type;
}
inline bool operator!=(const MFParamType &a, const MFParamType &b)
{
return !(a == b);
}
} // namespace fn
} // namespace blender
#endif /* __FN_MULTI_FUNCTION_PARAM_TYPE_HH__ */
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