text: /*************************************************************************/
  /*  math_fieldwise.cpp                                                   */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
  /*                                                                       */
  /* Permission is hereby granted, free of charge, to any person obtaining */
  /* a copy of this software and associated documentation files (the       */
  /* "Software"), to deal in the Software without restriction, including   */
  /* without limitation the rights to use, copy, modify, merge, publish,   */
  /* distribute, sublicense, and/or sell copies of the Software, and to    */
  /* permit persons to whom the Software is furnished to do so, subject to */
  /* the following conditions:                                             */
  /*                                                                       */
  /* The above copyright notice and this permission notice shall be        */
  /* included in all copies or substantial portions of the Software.       */
  /*                                                                       */
  /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
  /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
  /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
  /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
  /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
  /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
  /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
  /*************************************************************************/
  
  #ifdef TOOLS_ENABLED
  
  #include "math_fieldwise.h"
  
  #define SETUP_TYPE(m_type)    \
  	m_type source = p_source; \
  	m_type target = p_target;
  #define TRY_TRANSFER_FIELD(m_name, m_member) \
  	if (p_field == m_name) {                 \
  		target.m_member = source.m_member;   \
  	}
  
  Variant fieldwise_assign(const Variant &p_target, const Variant &p_source, const String &p_field) {
  
  	ERR_FAIL_COND_V(p_target.get_type() != p_source.get_type(), p_target);
  
  	/* clang-format makes a mess of this macro usage */
  	/* clang-format off */
  
  	switch (p_source.get_type()) {
  
  		case Variant::VECTOR2: {
  
  			SETUP_TYPE(Vector2)
  
  			/**/ TRY_TRANSFER_FIELD("x", x)
  			else TRY_TRANSFER_FIELD("y", y)
  
  			return target;
  		}
  
  		case Variant::RECT2: {
  
  			SETUP_TYPE(Rect2)
  
  			/**/ TRY_TRANSFER_FIELD("x", position.x)
  			else TRY_TRANSFER_FIELD("y", position.y)
  			else TRY_TRANSFER_FIELD("w", size.x)
  			else TRY_TRANSFER_FIELD("h", size.y)
  
  			return target;
  		}
  
  		case Variant::VECTOR3: {
  
  			SETUP_TYPE(Vector3)
  
  			/**/ TRY_TRANSFER_FIELD("x", x)
  			else TRY_TRANSFER_FIELD("y", y)
  			else TRY_TRANSFER_FIELD("z", z)
  
  			return target;
  		}
  
  		case Variant::PLANE: {
  
  			SETUP_TYPE(Plane)
  
  			/**/ TRY_TRANSFER_FIELD("x", normal.x)
  			else TRY_TRANSFER_FIELD("y", normal.y)
  			else TRY_TRANSFER_FIELD("z", normal.z)
  			else TRY_TRANSFER_FIELD("d", d)
  
  			return target;
  		}
  
  		case Variant::QUAT: {
  
  			SETUP_TYPE(Quat)
  
  			/**/ TRY_TRANSFER_FIELD("x", x)
  			else TRY_TRANSFER_FIELD("y", y)
  			else TRY_TRANSFER_FIELD("z", z)
  			else TRY_TRANSFER_FIELD("w", w)
  
  			return target;
  		}
  
  		case Variant::AABB: {
  
  			SETUP_TYPE(AABB)
  
  			/**/ TRY_TRANSFER_FIELD("px", position.x)
  			else TRY_TRANSFER_FIELD("py", position.y)
  			else TRY_TRANSFER_FIELD("pz", position.z)
  			else TRY_TRANSFER_FIELD("sx", size.x)
  			else TRY_TRANSFER_FIELD("sy", size.y)
  			else TRY_TRANSFER_FIELD("sz", size.z)
  
  			return target;
  		}
  
  		case Variant::TRANSFORM2D: {
  
  			SETUP_TYPE(Transform2D)
  
  			/**/ TRY_TRANSFER_FIELD("xx", elements[0][0])
  			else TRY_TRANSFER_FIELD("xy", elements[0][1])
  			else TRY_TRANSFER_FIELD("yx", elements[1][0])
  			else TRY_TRANSFER_FIELD("yy", elements[1][1])
  			else TRY_TRANSFER_FIELD("ox", elements[2][0])
  			else TRY_TRANSFER_FIELD("oy", elements[2][1])
  
  			return target;
  		}
  
  		case Variant::BASIS: {
  
  			SETUP_TYPE(Basis)
  
  			/**/ TRY_TRANSFER_FIELD("xx", elements[0][0])
  			else TRY_TRANSFER_FIELD("xy", elements[0][1])
  			else TRY_TRANSFER_FIELD("xz", elements[0][2])
  			else TRY_TRANSFER_FIELD("yx", elements[1][0])
  			else TRY_TRANSFER_FIELD("yy", elements[1][1])
  			else TRY_TRANSFER_FIELD("yz", elements[1][2])
  			else TRY_TRANSFER_FIELD("zx", elements[2][0])
  			else TRY_TRANSFER_FIELD("zy", elements[2][1])
  			else TRY_TRANSFER_FIELD("zz", elements[2][2])
  
  			return target;
  		}
  
  		case Variant::TRANSFORM: {
  
  			SETUP_TYPE(Transform)
  
  			/**/ TRY_TRANSFER_FIELD("xx", basis.elements[0][0])
  			else TRY_TRANSFER_FIELD("xy", basis.elements[0][1])
  			else TRY_TRANSFER_FIELD("xz", basis.elements[0][2])
  			else TRY_TRANSFER_FIELD("yx", basis.elements[1][0])
  			else TRY_TRANSFER_FIELD("yy", basis.elements[1][1])
  			else TRY_TRANSFER_FIELD("yz", basis.elements[1][2])
  			else TRY_TRANSFER_FIELD("zx", basis.elements[2][0])
  			else TRY_TRANSFER_FIELD("zy", basis.elements[2][1])
  			else TRY_TRANSFER_FIELD("zz", basis.elements[2][2])
  			else TRY_TRANSFER_FIELD("xo", origin.x)
  			else TRY_TRANSFER_FIELD("yo", origin.y)
  			else TRY_TRANSFER_FIELD("zo", origin.z)
  
  			return target;
  		}
  
  		default: {
  			ERR_FAIL_V(p_target);
  		}
  	}
  	/* clang-format on */
  }
  
  #endif // TOOLS_ENABLED
  