[MaL] Use fwd. decl. of ConfigTree.

Saves ca. 35 unneeded includes (out of 260)
and 25s of compilation time (out of 149s).

ChemistryLib/CreateChemicalSolverInterface.cpp

@@ -12,6 +12,7 @@
 
 #include <iphreeqc/src/src/phreeqcpp/cxxKinetics.h>
 
+#include "BaseLib/ConfigTree.h"
 #include "BaseLib/FileTools.h"
 #include "Common/CreateReactionRate.h"
 #include "MeshLib/Mesh.h"

MathLib/LinAlg/Eigen/EigenLinearSolver.h

@@ -10,11 +10,16 @@
 
 #pragma once
 
+#include <memory>
 #include <vector>
 
-#include "BaseLib/ConfigTree.h"
 #include "EigenOption.h"
 
+namespace BaseLib
+{
+class ConfigTree;
+}
+
 namespace MathLib
 {
 

ProcessLib/BoundaryCondition/PhaseFieldIrreversibleDamageOracleBoundaryCondition.cpp

@@ -12,6 +12,8 @@
 
 #include <algorithm>
 #include <vector>
+
+#include "BaseLib/ConfigTree.h"
 #include "BaseLib/Logging.h"
 
 namespace ProcessLib

ProcessLib/BoundaryCondition/Python/PythonBoundaryCondition.cpp

@@ -11,8 +11,10 @@
 #include "PythonBoundaryCondition.h"
 
 #include <pybind11/pybind11.h>
+
 #include <iostream>
 
+#include "BaseLib/ConfigTree.h"
 #include "MeshLib/MeshSearch/NodeSearch.h"
 #include "ProcessLib/Utils/CreateLocalAssemblers.h"
 #include "PythonBoundaryConditionLocalAssembler.h"

ProcessLib/CentralDifferencesJacobianAssembler.cpp

@@ -9,9 +9,11 @@
  */
 
 #include "CentralDifferencesJacobianAssembler.h"
+
+#include "BaseLib/ConfigTree.h"
 #include "BaseLib/Error.h"
-#include "MathLib/LinAlg/Eigen/EigenMapTools.h"
 #include "LocalAssemblerInterface.h"
+#include "MathLib/LinAlg/Eigen/EigenMapTools.h"
 
 namespace ProcessLib
 {

Tests/MathLib/TestLinearSolver.cpp

@@ -15,10 +15,11 @@
 
 #include <gtest/gtest.h>
 
-#include "MathLib/LinAlg/LinAlg.h"
+#include "BaseLib/ConfigTree.h"
+#include "MathLib/LinAlg/ApplyKnownSolution.h"
 #include "MathLib/LinAlg/Dense/DenseMatrix.h"
 #include "MathLib/LinAlg/FinalizeMatrixAssembly.h"
-#include "MathLib/LinAlg/ApplyKnownSolution.h"
+#include "MathLib/LinAlg/LinAlg.h"
 
 #ifdef OGS_USE_EIGEN
 #include "MathLib/LinAlg/Eigen/EigenMatrix.h"

Tests/NumLib/TestSerialLinearSolver.cpp

@@ -10,31 +10,29 @@
  *
  */
 
+#include <gtest/gtest.h>
+
 #include <cmath>
 #include <memory>
 #include <vector>
 
-#include <gtest/gtest.h>
-
+#include "BaseLib/ConfigTree.h"
 #include "MathLib/LinAlg/ApplyKnownSolution.h"
+#include "MathLib/LinAlg/FinalizeMatrixAssembly.h"
 #include "MathLib/LinAlg/GlobalMatrixVectorTypes.h"
 #include "MathLib/LinAlg/MatrixSpecifications.h"
 #include "MathLib/LinAlg/MatrixVectorTraits.h"
-#include "MathLib/LinAlg/FinalizeMatrixAssembly.h"
 #include "MathLib/MathTools.h"
-
 #include "MeshLib/Elements/Element.h"
 #include "MeshLib/Elements/Quad.h"
 #include "MeshLib/Location.h"
 #include "MeshLib/Mesh.h"
 #include "MeshLib/MeshSubset.h"
 #include "MeshLib/Node.h"
-
-#include "NumLib/NumericsConfig.h"
 #include "NumLib/DOF/DOFTableUtil.h"
-
-#include "Tests/TestTools.h"
+#include "NumLib/NumericsConfig.h"
 #include "SteadyDiffusion2DExample1.h"
+#include "Tests/TestTools.h"
 
 TEST(NumLibSerialLinearSolver, Steady2DdiffusionQuadElem)
 {