Added brief descriptions of some namespaces

[ci skip]

src/TNL/Images/Image.h

@@ -11,7 +11,10 @@
 #pragma once
 
 namespace TNL {
-namespace Images {   
+/**
+ * \brief Namespace for image processing.
+ */
+namespace Images {
 
 template< typename Index = int >
 class Image

src/TNL/Matrices/Matrix.h

@@ -16,7 +16,10 @@
 #include <TNL/Containers/VectorView.h>
 
 namespace TNL {
-namespace Matrices {   
+/**
+ * \brief Namespace for matrix formats.
+ */
+namespace Matrices {
 
 template< typename Real = double,
           typename Device = Devices::Host,

src/TNL/Meshes/Mesh.h

@@ -29,6 +29,9 @@
 #include <TNL/Meshes/DistributedMeshes/DistributedMesh.h>
 
 namespace TNL {
+/**
+ * \brief Namespace for numerical meshes and related objects.
+ */
 namespace Meshes {
 
 template< typename MeshConfig > class Initializer;

src/TNL/Solvers/Linear/LinearSolver.h

@@ -23,6 +23,9 @@
 
 namespace TNL {
 namespace Solvers {
+/**
+ * \brief Namespace for linear system solvers.
+ */
 namespace Linear {
 
 template< typename Matrix >

src/TNL/Solvers/Linear/Preconditioners/Preconditioner.h

@@ -20,6 +20,9 @@
 namespace TNL {
 namespace Solvers {
 namespace Linear {
+/**
+ * \brief Namespace for preconditioners for linear system solvers.
+ */
 namespace Preconditioners {
 
 template< typename Matrix >