### Install Doxygen and Graphviz on Ubuntu

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/Doxygen/README.org

Installs the necessary packages for building Doxygen documentation on Ubuntu GNU/Linux systems.

```bash
sudo apt-get install doxygen graphviz
```

--------------------------------

### Documenting Namespaces in Header Files

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Illustrates documenting a namespace by referencing the header file where it is defined, using the 'Foam' namespace as an example documented in 'foamVersion.H'.

```C++
namespace 'Foam' is documented in the foamVersion.H file
```

--------------------------------

### Doxygen Example with Verbatim and Code Blocks

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Demonstrates the use of Doxygen tags like 'InClass' and 'Description', along with embedded verbatim and code blocks for illustrating input files and code loops.

```C++
InClass
    Foam::myClass

Description
    Implements the read and writing of files.

    An example input file:
    \verbatim
        patchName
        {
            type        patchType;
            refValue    100;
            value       uniform 1;
        }
    \endverbatim

    Within the implementation, a loop over all patches is done:
    \code
        forAll(patches, patchi)
        {
            ...  // some operation
        }
    \endcode
```

--------------------------------

### Documentation comment structure

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Provides an example of the structure for documentation comments, using tags like 'Class' and 'Description'. The first paragraph after 'Description' is the brief description.

```C++
Class
    Foam::myClass

Description
    A class for specifying the documentation style.

```

--------------------------------

### APA Style Reference Example

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Provides an example of how to format references in the 'Description' section of class header files using the APA style, as seen in the kEpsilon turbulence model documentation.

```text
Description
    Standard k-epsilon turbulence model for incompressible and compressible
    flows including rapid distortion theory (RDT) based compression term.

    Reference:
    \verbatim
        Standard model:
            Launder, B. E., & Spalding, D. B. (1972).
            Lectures in mathematical models of turbulence.

            Launder, B. E., & Spalding, D. B. (1974).
            The numerical computation of turbulent flows.
            Computer methods in applied mechanics and engineering,
            3(2), 269-289.

    
```

--------------------------------

### Doxygen Brief and Detailed Description in Header Files

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Use special comment syntax in header files for Doxygen documentation. Text starting with '//-' becomes the brief description, and subsequent lines form the detailed description.

```C++
//- A function which returns a thing
//  This is a detailed description of the function
//  which processes stuff and returns other stuff
//  depending on things.
thing function(stuff1, stuff2);
```

--------------------------------

### Doxygen List Entries in Header Files

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Format list entries in Doxygen comments using '- ' or '-# ' for numbered lists. Ensure there is a blank line after the brief description before starting the list.

```C++
//- Compare triFaces
//  Returns:
//  -  0: different
//  - +1: identical
//  - -1: same face, but different orientation
static inline int compare(const triFace&, const triFace&);
```

```C++
//- Compare triFaces returning 0, +1 or -1
//
//  -  0: different
//  - +1: identical
//  - -1: same face, but different orientation
static inline int compare(const triFace&, const triFace&);
```

--------------------------------

### Stream Output Formatting

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Align stream output operators (<<) for consistent formatting. Use four spaces after the start of the stream.

```c++
Info<< ...
os  << ...

```

--------------------------------

### Open Doxygen Index File in Firefox

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/Doxygen/README.org

Opens the generated index.html file in the Firefox browser to view the OpenFOAM source code documentation. Assumes Firefox is installed and the html directory is accessible.

```bash
firefox html/index.html
```

--------------------------------

### Incorrect assignment split (function on new line)

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Illustrates an incorrect assignment split where the function call starts on a new line without proper indentation. Ensure consistent indentation.

```C++
variableName = longClassName.longFunctionName
(
    longArgument1,
    longArgument2
);

```

--------------------------------

### Standard for loop

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Demonstrates the standard for loop syntax. Use this for simple iterative loops.

```C++
for (i = 0; i < maxI; i++)
{
    code;
}
```

--------------------------------

### Run All Make Script for Doxygen

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/Doxygen/README.org

Executes the Allwmake script in the Doxygen directory to build the HTML documentation. The output will be located in the html subdirectory.

```bash
./Allwmake
```

--------------------------------

### forAll macro usage

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Demonstrates the correct usage of the forAll macro for iterating over containers. Ensure no space between 'forAll' and the opening parenthesis.

```C++
forAll(

```

--------------------------------

### Set Library and Include Directories

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Configures directories for linking libraries and including headers, utilizing environment variables for paths.

```cmake
LINK_DIRECTORIES(
    $ENV{FOAM_LIBBIN}
    $ENV{FOAM_EXT_LIBBIN}
    $ENV{PV_PLUGIN_PATH}
)

INCLUDE_DIRECTORIES(
    $ENV{WM_PROJECT_DIR}/src/OpenFOAM/lnInclude
    $ENV{WM_PROJECT_DIR}/src/OSspecific/$ENV{WM_OSTYPE}/lnInclude
    ${PROJECT_SOURCE_DIR}/../vtkPVblockMesh
    ${PROJECT_SOURCE_DIR}/vtk
)
```

--------------------------------

### Documenting Classes in Header Files

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Use 'Class' and 'Namespace' tags in header files to document classes. The 'Description' block then applies to the class itself.

```C++
InClass
    Foam::myClass

Description
    Implements the read and writing of files.
```

--------------------------------

### Splitting long function signature (second split)

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Demonstrates how to split a long function signature a second time, splitting at the function name and aligning subsequent parts to the left.

```C++
const Foam::longReturnTypeName&
Foam::veryveryveryverylongClassName::
veryveryveryverylongFunctionName const

```

--------------------------------

### Splitting mathematical formulae over multiple lines

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Demonstrates how to split complex mathematical formulae across lines, keeping the operator on the lower line and indenting subsequent parts.

```C++
variableName =
    a*(a + b)
   *exp(c/d)
   *(k + t);

```

--------------------------------

### Link Libraries for ParaView Versions < 5.5

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Links necessary libraries for building the plugin when ParaView version is less than 5.5.

```cmake
IF(${ParaView_VERSION} VERSION_LESS 5.5)
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVFoam
        finiteVolume
        OpenFOAM
        LINK_PRIVATE
        pqApplicationComponents
    )
ELSEIF(${ParaView_VERSION} VERSION_LESS 5.7)
    # Assume QT version 5 if it hasn't been defined
    IF(NOT PARAVIEW_QT_MAJOR_VERSION)
        set(PARAVIEW_QT_MAJOR_VERSION 5)
    ENDIF()
    # Paraview-5.5.x and higher needs QT libraries listed in the link command
    # in order for the headers to be available
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVFoam
        finiteVolume
        OpenFOAM
        Qt${PARAVIEW_QT_MAJOR_VERSION}::Core
        Qt${PARAVIEW_QT_MAJOR_VERSION}::Gui
        LINK_PRIVATE
        pqApplicationComponents
    )
ELSE()
    # Assume QT version 5 if it hasn't been defined
    IF(NOT PARAVIEW_QT_MAJOR_VERSION)
        set(PARAVIEW_QT_MAJOR_VERSION 5)
    ENDIF()
    # Paraview-5.5.x and higher needs QT libraries listed in the link command
    # in order for the headers to be available
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVFoam
        finiteVolume
        OpenFOAM
        Qt${PARAVIEW_QT_MAJOR_VERSION}::Core
        Qt${PARAVIEW_QT_MAJOR_VERSION}::Gui
        LINK_PRIVATE
        ParaView::pqApplicationComponents
    )
ENDIF()
```

--------------------------------

### Link Libraries for Plugin (ParaView < 5.5)

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Links necessary libraries for the plugin when ParaView version is less than 5.5.

```cmake
IF(${ParaView_VERSION} VERSION_LESS 5.5)
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVblockMesh
        OpenFOAM
        LINK_PRIVATE
        pqApplicationComponents
    )
ELSEIF(${ParaView_VERSION} VERSION_LESS 5.7)
    # Assume QT version 5 if it hasn't been defined
    IF(NOT PARAVIEW_QT_MAJOR_VERSION)
        set(PARAVIEW_QT_MAJOR_VERSION 5)
    ENDIF()
    # Paraview-5.5.x and higher needs QT libraries listed in the link command
    # in order for the headers to be available
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVblockMesh
        OpenFOAM
        Qt${PARAVIEW_QT_MAJOR_VERSION}::Core
        Qt${PARAVIEW_QT_MAJOR_VERSION}::Gui
        LINK_PRIVATE
        pqApplicationComponents
    )
ELSE()
    # Assume QT version 5 if it hasn't been defined
    IF(NOT PARAVIEW_QT_MAJOR_VERSION)
        set(PARAVIEW_QT_MAJOR_VERSION 5)
    ENDIF()
    # Paraview-5.5.x and higher needs QT libraries listed in the link command
    # in order for the headers to be available
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVblockMesh
        OpenFOAM
        Qt${PARAVIEW_QT_MAJOR_VERSION}::Core
        Qt${PARAVIEW_QT_MAJOR_VERSION}::Gui
        LINK_PRIVATE
        ParaView::pqApplicationComponents
    )
ENDIF()
```

--------------------------------

### Include ParaView Use File for Older Versions

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Includes the ParaView use file for ParaView versions 5.7.x and lower.

```cmake
IF(${ParaView_VERSION} VERSION_LESS 5.7)
    # ParaView-5.7.x and lower requires the paraview include file
    INCLUDE(${PARAVIEW_USE_FILE})
ENDIF()
```

--------------------------------

### Documenting Namespaces within Classes

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Shows how to document a namespace when it is contained within a class, specifically for the 'Foam::functionEntries' namespace within the 'Foam::functionEntry' class.

```C++
documented namespace 'Foam::functionEntries' within the
class 'Foam::functionEntry'
```

--------------------------------

### Compact for loop (discouraged)

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Illustrates a compact for loop syntax that is discouraged due to potential readability issues. Avoid this style.

```C++
for(i = 0; i < maxI; i++)
{
    code;
}
```

--------------------------------

### Generate Doxygen Header, Footer, and Stylesheet

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/Doxygen/README.org

Generates the HTML header, footer, and custom stylesheet files required for Doxygen documentation customization. Ensure you are in the correct directory.

```bash
doxygen -w html header.html footer.html customdoxygen.css
```

--------------------------------

### Multi-line for loop

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Shows an alternative for loop syntax where components are placed on separate lines. This can improve readability for complex loop conditions.

```C++
for
(
    i = 0;
    i < maxI;
    i++
)
{
    code;
}
```

--------------------------------

### Splitting logical tests over several lines

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Illustrates the preferred method for splitting logical tests across multiple lines, outdenting the operator to align the next condition.

```C++
if
(
    a == true
 && b == c
)

```

--------------------------------

### Set Include Directories

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Specifies directories for header file searching during compilation.

```cmake
INCLUDE_DIRECTORIES(
    $ENV{WM_PROJECT_DIR}/src/OpenFOAM/lnInclude
    $ENV{WM_PROJECT_DIR}/src/OSspecific/$ENV{WM_OSTYPE}/lnInclude
    $ENV{WM_PROJECT_DIR}/src/finiteVolume/lnInclude
    ${PROJECT_SOURCE_DIR}/../vtkPVFoam
    ${PROJECT_SOURCE_DIR}/vtk
)
```

--------------------------------

### Splitting formulae with extra parentheses

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Shows an alternative for splitting formulae using extra parentheses for enhanced readability, with operators on lower lines and indented content.

```C++
variableName =
(
    a*(a + b)
   *exp(c/d)
   *(k + t)
);

```

--------------------------------

### Set Link Directories

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Specifies directories where libraries should be searched for linking.

```cmake
LINK_DIRECTORIES(
    $ENV{FOAM_LIBBIN}
    $ENV{FOAM_EXT_LIBBIN}
    $ENV{PV_PLUGIN_PATH}
)
```

--------------------------------

### Splitting function signature over multiple lines

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Demonstrates the preferred method for splitting long function signatures across multiple lines. The return type and function name are aligned to the left.

```C++
const Foam::longReturnTypeName&
Foam::longClassName::longFunctionName const

```

--------------------------------

### Handle ParaView Version for Target Name

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Sets the target name based on the ParaView version. Versions prior to 5.7 prepend 'lib'.

```cmake
IF(${ParaView_VERSION} VERSION_LESS 5.7)
    # ParaView-5.7.x and lower will prepend "lib" to the target name
    SET(TARGET_NAME PVblockMeshReader_SM)
ELSE()
    SET(TARGET_NAME libPVblockMeshReader_SM)
ENDIF()
```

--------------------------------

### Set Plugin Output Directory

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Configures the output directory for the plugin's library file.

```cmake
SET_TARGET_PROPERTIES(
    ${TARGET_NAME}
    PROPERTIES
    LIBRARY_OUTPUT_DIRECTORY "$ENV{PV_PLUGIN_PATH}"
)
```

--------------------------------

### Add Compiler Definitions

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Adds preprocessor definitions for the compiler, including C++ standard and OpenFOAM specific flags.

```cmake
ADD_DEFINITIONS(
    -std=c++17
    -DWM_$ENV{WM_PRECISION_OPTION}
    -DWM_LABEL_SIZE=$ENV{WM_LABEL_SIZE}
)
```

--------------------------------

### Add ParaView Plugin (Older Versions)

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Adds the ParaView plugin using ADD_PARAVIEW_PLUGIN for versions prior to 5.7.

```cmake
IF(${ParaView_VERSION} VERSION_LESS 5.7)
    ADD_PARAVIEW_PLUGIN(
        ${TARGET_NAME}
        "1.0"
        SERVER_MANAGER_XML PVblockMeshReader_SM.xml
        SERVER_MANAGER_SOURCES vtk/vtkPVblockMeshReader.cxx
    )
ELSE()
    # Paraview-5.7.x and higher builds the vtk module separately
    PARAVIEW_ADD_PLUGIN(
        ${TARGET_NAME}
        VERSION "1.0"
        SERVER_MANAGER_XML PVblockMeshReader_SM.xml
        MODULES PVblockMeshReader_VTK
        MODULE_FILES "vtk/vtk.module"
    )
ENDIF()
```

--------------------------------

### Find ParaView Package

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Locates the ParaView package, which is required for building the plugin.

```cmake
FIND_PACKAGE(ParaView REQUIRED)
```

--------------------------------

### Set Minimum CMake Version and Project Name

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Specifies the minimum required CMake version and sets the project name for the build.

```cmake
CMAKE_MINIMUM_REQUIRED(VERSION 3.5.1)

PROJECT(PVblockMeshReader)
```

--------------------------------

### Splitting assignment with multi-line arguments

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Illustrates splitting a long assignment where the function call has multiple arguments, requiring further line breaks.

```C++
variableName =
    longClassName.longFunctionName
    (
        longArgument1,
        longArgument2
    );

```

--------------------------------

### forAll macro with space (discouraged)

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Shows the discouraged usage of the forAll macro with a space between 'forAll' and the opening parenthesis. Avoid this style.

```C++
forAll (

```

--------------------------------

### Variable Initialization using Assignment

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Initialize variables using assignment with the '&' operator for const references, not direct initialization in parentheses.

```C++
const className& variableName = otherClass.data();
```

--------------------------------

### Fully Scoped Namespace in Source Files

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

In source files, fully scope function names instead of opening/closing namespaces. This avoids clutter and ensures clarity.

```C++
Foam::returnType Foam::className::functionName()
```

--------------------------------

### Documenting Under-Documented Classes with Namespace

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

When a class is not yet fully documented, use its namespace-qualified name for the description to aid in later identification. This ensures Doxygen correctly associates the documentation.

```C++
Class
    Foam::myUnderDocumentedClass

Description
    Foam::myUnderDocumentedClass
```

--------------------------------

### Add ParaView Plugin for Older Versions

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Adds a ParaView plugin using ADD_PARAVIEW_PLUGIN for versions prior to 5.7.

```cmake
IF(${ParaView_VERSION} VERSION_LESS 5.7)
    ADD_PARAVIEW_PLUGIN(
        ${TARGET_NAME}
        "1.0"
        SERVER_MANAGER_XML PVFoamReader_SM.xml
        SERVER_MANAGER_SOURCES vtk/vtkPVFoamReader.cxx
    )
ELSE()
    # Paraview-5.7.x and higher builds the vtk module separately
    PARAVIEW_ADD_PLUGIN(
        ${TARGET_NAME}
        VERSION "1.0"
        SERVER_MANAGER_XML PVFoamReader_SM.xml
        MODULES PVFoamReader_VTK
        MODULE_FILES "vtk/vtk.module"
    )
ENDIF()
```

--------------------------------

### Warning Message Formatting

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Format warning messages with stream output aligned. Ensure the '<<' symbol is correctly positioned.

```C++
WarningInFunction
    << "Warning message"

```

--------------------------------

### Accessing a Cell Zone by Name

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/mesh/conversion/fluentMeshToFoam/README.txt

Demonstrates how to access a specific cell zone from the mesh object using its name. This is useful for retrieving and manipulating zone data.

```cpp
const labelList& thisCellZone = mesh.cellZones()["thisZoneName"];
```

--------------------------------

### Set Library Output Directory for PVFoamReader VTK

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/vtk/CMakeLists.txt

Configures the library output directory for the 'PVFoamReader_VTK' target to the environment variable PV_PLUGIN_PATH.

```cmake
SET(
    PVFoamReader_VTK
    PROPERTIES
    LIBRARY_OUTPUT_DIRECTORY "$ENV{PV_PLUGIN_PATH}"
)
```

--------------------------------

### Set Minimum CMake Version and Project Name

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Specifies the minimum required CMake version and defines the project name for the PVFoamReader.

```cmake
CMAKE_MINIMUM_REQUIRED(VERSION 3.5.1)

PROJECT(PVFoamReader)
```

--------------------------------

### Link Libraries for PVFoamReader VTK Target

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/vtk/CMakeLists.txt

Specifies the public and private libraries to link against for the 'PVFoamReader_VTK' target, including VTK, OpenFOAM, and Qt components.

```cmake
TARGET_LINK_LIBRARIES(
    PVFoamReader_VTK
    LINK_PUBLIC
    vtkPVFoam
    finiteVolume
    OpenFOAM
    Qt${PARAVIEW_QT_MAJOR_VERSION}::Core
    Qt${PARAVIEW_QT_MAJOR_VERSION}::Gui
    LINK_PRIVATE
    ParaView::pqApplicationComponents
)
```

--------------------------------

### Link Libraries for PVblockMeshReader VTK Target

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/vtk/CMakeLists.txt

Links public and private libraries required by the PVblockMeshReader VTK target, including VTK, OpenFOAM, and Qt components.

```cmake
TARGET_LINK_LIBRARIES(
    PVblockMeshReader_VTK
    LINK_PUBLIC
    vtkPVblockMesh
    OpenFOAM
    Qt${PARAVIEW_QT_MAJOR_VERSION}::Core
    Qt${PARAVIEW_QT_MAJOR_VERSION}::Gui
    LINK_PRIVATE
    ParaView::pqApplicationComponents
)
```

--------------------------------

### Set Target Properties for PVblockMeshReader VTK

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/vtk/CMakeLists.txt

Sets the library output directory for the PVblockMeshReader VTK target to the plugin path environment variable.

```cmake
SET_TARGET_PROPERTIES(
    PVblockMeshReader_VTK
    PROPERTIES
    LIBRARY_OUTPUT_DIRECTORY "$ENV{PV_PLUGIN_PATH}"
)
```

--------------------------------

### Set Default Paraview Qt Major Version

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/vtk/CMakeLists.txt

Ensures PARAVIEW_QT_MAJOR_VERSION is set to 5 if it is not already defined.

```cmake
IF(NOT PARAVIEW_QT_MAJOR_VERSION)
    set(PARAVIEW_QT_MAJOR_VERSION 5)
ENDIF()
```

--------------------------------

### Incorrect function signature split (scope on new line)

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Shows an incorrect way to split function signatures by placing the scope resolution operator '::' on a new line. Avoid this formatting.

```C++
const Foam::longReturnTypeName& Foam::longClassName::
longFunctionName const

```

--------------------------------

### Incorrect function signature split (indentation)

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Shows an incorrect way to split function signatures, with improper indentation. Avoid indenting the function name and arguments excessively.

```C++
const Foam::longReturnTypeName&
    Foam::longClassName::longFunctionName const

```

--------------------------------

### Define VTK Module for PVblockMeshReader

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/vtk/CMakeLists.txt

Defines the VTK module for PVblockMeshReader, specifying its classes.

```cmake
VTK_MODULE_ADD_MODULE(PVblockMeshReader_VTK CLASSES vtkPVblockMeshReader)
```

--------------------------------

### Add VTK Module for PVFoamReader

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/vtk/CMakeLists.txt

Adds a VTK module named 'PVFoamReader_VTK_CLASSES' for the 'vtkPVFoamReader' component.

```cmake
VTK_MODULE_ADD_MODULE(PVFoamReader_VTK CLASSES vtkPVFoamReader)
```

--------------------------------

### Class Declaration Header

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Use a centered header for class declarations. Ensure the header format is consistent.

```C++
/*---------------------------------------------------------------------------*\
                        Class exampleClass Declaration
\*---------------------------------------------------------------------------*/

```

--------------------------------

### Nested Namespaces in Source Files

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

When multiple levels of namespaces are involved, they can be used in source files to prevent excessive prefixing, with closing namespace comments.

```C++
namespace Foam
{
namespace compressible
{
namespace RASModels
{
    ...
} // End namespace RASModels
} // End namespace compressible
} // End namespace Foam
```

--------------------------------

### Operator spacing in comparison and logical operations

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Specifies spacing for comparison and logical operators. Use spaces around all comparison operators and logical AND/OR.

```C++
a = b, a != b
a < b, a > b, a >= b, a <= b
a || b, a && b

```

--------------------------------

### forAllIter macro with comma in type (fails)

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Illustrates a case where the forAllIter macro fails due to a comma within the iterated object's type. This highlights a limitation of these macros.

```C++
forAllIter(HashTable<labelPair, edge, Hash<edge>>, foo, iter)

```

--------------------------------

### Nested Doxygen Lists in Header Files

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Nested lists can be used in Doxygen comments for detailed explanations. Ensure proper indentation and list item markers.

```C++
//- Search for \em name
//  in the following hierarchy:
//  -# personal settings:
//    - ~/.OpenFOAM/\<VERSION\>/ 
//      <em>for version-specific files</em>
//    - ~/.OpenFOAM/
//      <em>for version-independent files</em>
//  -# site-wide settings:
//    - $WM_PROJECT_INST_DIR/site/\<VERSION\>/etc/
//      <em>for version-specific files</em>
//    - $WM_PROJECT_INST_DIR/site/etc/
//      <em>for version-independent files</em>
//  -# shipped settings:
//    - $WM_PROJECT_DIR/etc/
//
//  \return the full path name or fileName() if the name cannot be found
//  Optionally abort if the file cannot be found
fileName findEtcFile(const fileName&, bool mandatory=false);
```

--------------------------------

### Incorrect function signature split (const on new line)

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Illustrates another incorrect method for splitting function signatures, where 'const' is placed on its own line. Keep 'const' with the function name and arguments.

```C++
const Foam::longReturnTypeName& Foam::longClassName::longFunctionName
const

```

--------------------------------

### Standard If Statement Formatting

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Use braces for all code blocks within if statements, even for single lines. The condition can be placed on the same line or wrapped for readability if long.

```C++
if (condition)
{
    code;
}
```

```C++
if
(
   long condition
)
{
    code;
}
```

--------------------------------

### Set Target Name Based on ParaView Version

Source: https://github.com/openfoam/openfoam-dev/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Determines the target library name based on the ParaView version. Older versions prepend 'lib'.

```cmake
IF(${ParaView_VERSION} VERSION_LESS 5.7)
    # ParaView-5.7.x and lower will prepend "lib" to the target name
    SET(TARGET_NAME PVFoamReader_SM)
ELSE()
    SET(TARGET_NAME libPVFoamReader_SM)
ENDIF()
```

--------------------------------

### Incorrect assignment split (operator on new line)

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Shows an incorrect way to split assignment statements, placing the assignment operator '=' on a new line. The operator should remain on the first line.

```C++
variableName =
longClassName.longFunctionName(longArgument);

```

--------------------------------

### Splitting assignment with long function call

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Shows the preferred way to split a long assignment statement, indenting the right-hand side after the equals sign.

```C++
variableName =
    longClassName.longFunctionName(longArgument);

```

--------------------------------

### Operator spacing in arithmetic and bitwise operations

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Defines the preferred spacing around arithmetic and bitwise operators. Use spaces around '+' and '-' but not around '*' and '/'.

```C++
a + b, a - b
a*b, a/b
a & b, a ^ b

```

--------------------------------

### Doxygen Comment for Destructor

Source: https://github.com/openfoam/openfoam-dev/blob/master/doc/codingStyleGuide.org

Use a standard Doxygen comment for destructors, similar to other functions.

```C++
//- Destructor
~className();
```

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