### Basic CMake Setup

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Initializes the CMake version and project name. Sets up the ParaView package requirement.

```cmake
CMAKE_MINIMUM_REQUIRED(VERSION 3.5.1)

PROJECT(PVFoamReader)

FIND_PACKAGE(ParaView REQUIRED)
```

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

### Install Doxygen and Graphviz

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/Doxygen/README.org

Installs the required Doxygen and Graphviz packages on Ubuntu GNU/Linux systems using apt-get.

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

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

### Doxygen Example with Verbatim and Code Blocks in C++

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Demonstrates using Doxygen special commands like \verbatim and \code within documentation blocks. Ensure Doxygen commands are correctly formatted.

```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
```

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

### Documenting Namespaces in C++

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Examples of documenting namespaces, either explicitly declared or within class definitions.

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

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

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

### APA Style Reference Example

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Illustrates the correct formatting for references in the 'Description' section of class header files, following the APA style guide.

```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.

    
```

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

### Documentation comment tags

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Provides an example of using documentation comment tags like 'Class' and 'Description' for Doxygen pre-filtering.

```C++
Class
    Foam::myClass

Description
    A class for specifying the documentation style.

```

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

### forAll macro usage

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Demonstrates the correct usage of the forAll macro for iterating over containers.

```C++
forAll(

```

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

### Standard for loop

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Demonstrates the preferred standard for loop syntax in C++.

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

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

### Run Doxygen Build Script

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/Doxygen/README.org

Executes the Allwmake script in the Doxygen directory to generate the OpenFOAM source code documentation. The output is placed in the html directory.

```bash
./Allwmake
```

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

### Directory and Definition Configuration

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Configures library search paths, include directories, and compiler definitions for the project. Includes 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
    $ENV{WM_PROJECT_DIR}/src/finiteVolume/lnInclude
    ${PROJECT_SOURCE_DIR}/../vtkPVFoam
    ${PROJECT_SOURCE_DIR}/vtk
)

ADD_DEFINITIONS(
    -std=c++14
    -DWM_$ENV{WM_PRECISION_OPTION}
    -DWM_LABEL_SIZE=$ENV{WM_LABEL_SIZE}
)
```

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

### Doxygen Brief and Detailed Description in C++ Headers

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Use '//-' for the Doxygen brief description and subsequent lines for the detailed description in header files. Ensure proper spacing for list items.

```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);
```

```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&);
```

```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);
```

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

### Open Doxygen Documentation in Firefox

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/Doxygen/README.html

After generating the documentation, use this command to open the main index file in the Firefox browser. This allows you to view the generated documentation.

```bash
firefox $WM_PROJECT_DIR/doc/Doxygen/html/index.html
```

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

### Documenting Class Implementation in C++

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Use 'InClass' and 'InNamespace' tags in header files for class documentation, and 'InClass' in source files for file-specific documentation.

```C++
InClass
    Foam::myClass

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

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

### Set Include Directories

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Specifies directories where the compiler should search for header files. Includes OpenFOAM, OS-specific, and local plugin headers.

```cmake
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
)
```

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

### Generate Doxygen Header, Footer, and Stylesheet

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/Doxygen/README.org

Generates the HTML header, footer, and a custom CSS stylesheet for Doxygen documentation. This command should be run from the Doxygen configuration directory.

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

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

### Linking Libraries for Plugin

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Links the necessary libraries to the plugin target. Includes version-specific Qt5 libraries for newer ParaView versions.

```cmake
# Build the plugin
IF(${ParaView_VERSION} VERSION_LESS 5.5)
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVFoam
        finiteVolume
        OpenFOAM
    )
ELSE()
    # Paraview-5.5.x and higher needs QT-5 libraries listed in the link command
    # in order for the headers to be available
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVFoam
        finiteVolume
        OpenFOAM
        Qt5::Core
        Qt5::Gui
    )
ENDIF()
```

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

### Compact for loop (discouraged)

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

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

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

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

### Multi-line for loop

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Shows an alternative, multi-line for loop syntax for improved readability.

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

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

### forAll macro (discouraged)

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Shows a discouraged syntax for the forAll macro with a space before the opening parenthesis.

```C++
forAll (

```

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

### Setting Library Output Directory

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Configures the output directory for the plugin's library to the ParaView plugin path.

```cmake
# Set the output library destination to the plugin directory
SET_TARGET_PROPERTIES(
    ${TARGET_NAME}
    PROPERTIES
    LIBRARY_OUTPUT_DIRECTORY "$ENV{PV_PLUGIN_PATH}"
)
```

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

### Set Link Directories

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Specifies directories where the linker should search for libraries. Includes OpenFOAM and ParaView plugin paths.

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

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

### Adding ParaView Plugin with Version Specifics

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Adds the PVFoamReader plugin, with different arguments based on ParaView version. Older versions require GUI resource files.

```cmake
# Add the plugin
IF(${ParaView_VERSION} VERSION_LESS 4.1)
    # ParaView-4.0.x and lower requires a GUI_RESOURCE_FILES XML file
    ADD_PARAVIEW_PLUGIN(
        ${TARGET_NAME}
        "1.0"
        SERVER_MANAGER_XML PVFoamReader_SM.xml
        SERVER_MANAGER_SOURCES vtk/vtkPVFoamReader.cxx
        GUI_RESOURCE_FILES PVFoamReader.xml
    )
ELSEIF(${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()
```

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

### Open Doxygen Documentation in Firefox

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/Doxygen/README.org

Opens the generated index.html file of the OpenFOAM Doxygen documentation in the Firefox browser.

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

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

### Splitting long function name and class name

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Demonstrates how to split function and class names across multiple lines when they are excessively long.

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

```

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

### Splitting function return type and name

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Demonstrates the preferred method for splitting function return types and names across multiple lines for long declarations.

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

```

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

### Add ParaView Plugin for Older Versions (<= 4.0.x)

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Adds the ParaView plugin for versions 4.0.x and lower, requiring a GUI_RESOURCE_FILES XML file.

```cmake
IF(${ParaView_VERSION} VERSION_LESS 4.1)
    # ParaView-4.0.x and lower requires a GUI_RESOURCE_FILES XML file
    ADD_PARAVIEW_PLUGIN(
        ${TARGET_NAME}
        "1.0"
        SERVER_MANAGER_XML PVblockMeshReader_SM.xml
        SERVER_MANAGER_SOURCES vtk/vtkPVblockMeshReader.cxx
        GUI_RESOURCE_FILES PVblockMeshReader.xml
    )
ELSEIF(${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()
```

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

### Splitting mathematical formulae with extra parentheses

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Illustrates splitting long mathematical formulae using extra parentheses for clarity, with operators on lower lines.

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

```

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

### Link Libraries for Older ParaView Versions (< 5.5)

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Links the plugin target to necessary libraries for ParaView versions older than 5.5, including vtkPVblockMesh and OpenFOAM.

```cmake
IF(${ParaView_VERSION} VERSION_LESS 5.5)
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVblockMesh
        OpenFOAM
    )
ELSE()
    # Paraview-5.5.x and higher needs QT-5 libraries listed in the link command
    # in order for the headers to be available
    TARGET_LINK_LIBRARIES(
        ${TARGET_NAME}
        LINK_PUBLIC
        vtkPVblockMesh
        OpenFOAM
        Qt5::Core
        Qt5::Gui
    )
ENDIF()
```

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

### Set Target Properties for PVblockMeshReader

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/vtk/CMakeLists.txt

Configures the 'PVblockMeshReader_VTK' target to place its library output in the directory specified by the PV_PLUGIN_PATH environment variable. This is crucial for plugin discovery.

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

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

### Include ParaView Use File for Older Versions

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Includes the ParaView use file for versions older than 5.7. This file provides necessary definitions and targets for older ParaView builds.

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

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

### Set Minimum CMake Version and Project Name

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

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

```cmake
CMAKE_MINIMUM_REQUIRED(VERSION 3.5.1)

PROJECT(PVblockMeshReader)
```

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

### Link Libraries for PVFoamReader VTK Target

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/vtk/CMakeLists.txt

Links necessary libraries to the PVFoamReader VTK target, including VTK modules, OpenFOAM, and Qt.

```cmake
TARGET_LINK_LIBRARIES(
    PVFoamReader_VTK
    LINK_PUBLIC
    vtkPVFoam
    finiteVolume
    OpenFOAM
    Qt5::Core
    Qt5::Gui
)
```

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

### Splitting mathematical formulae with operator on lower line

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Shows how to split long mathematical formulae over multiple lines, with the operator placed on the lower line and aligned indentation.

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

```

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

### Add Preprocessor Definitions

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Adds preprocessor definitions for the C++ standard, precision, and label size, often used for OpenFOAM integration.

```cmake
ADD_DEFINITIONS(
    -std=c++14
    -DWM_$ENV{WM_PRECISION_OPTION}
    -DWM_LABEL_SIZE=$ENV{WM_LABEL_SIZE}
)
```

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

### Set Plugin Library Output Directory

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Configures the target properties to set the output directory for the plugin library to the ParaView plugin path.

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

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

### Splitting logical tests with outdented operator

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Demonstrates splitting logical tests over multiple lines, outdenting the operator for alignment with subsequent variables.

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

```

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

### forAllIter macro with complex type

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Illustrates the use of the forAllIter macro with a complex type, highlighting potential issues with commas in the type definition.

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

```

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

### Find ParaView Package

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Finds the ParaView package, which is required for building the plugin. This makes ParaView's build system targets and variables available.

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

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

### Splitting function return type and name (discouraged - indentation)

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Shows a discouraged way to split function declarations with incorrect indentation.

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

```

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

### Documenting Under-Documented Classes in C++

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Use the namespace-qualified class name for the description when there's nothing specific to add. This helps in identifying under-documented classes.

```C++
Class
    Foam::myUnderDocumentedClass

Description
    Foam::myUnderDocumentedClass
```

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

### Accessing Cell Zones in OpenFOAM

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/mesh/conversion/fluentMeshToFoam/README.txt

Demonstrates how to access a specific cell zone by its name from the polyMesh object. This is useful for manipulating or querying zone data.

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

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

### Link Libraries for PVblockMeshReader Target

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/vtk/CMakeLists.txt

Specifies the libraries that the 'PVblockMeshReader_VTK' target depends on. It links public libraries including 'vtkPVblockMesh', 'OpenFOAM', and Qt5 modules for core and GUI functionalities.

```cmake
TARGET_LINK_LIBRARIES(
    PVblockMeshReader_VTK
    LINK_PUBLIC
    vtkPVblockMesh
    OpenFOAM
    Qt5::Core
    Qt5::Gui
)
```

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

### Splitting long line at assignment operator with function call (discouraged)

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Illustrates a discouraged way to split a line at an assignment operator followed by a function call, with improper alignment.

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

```

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

### Splitting long line at assignment operator with function call

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Illustrates splitting a long line at an assignment operator, followed by a function call that also requires splitting.

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

```

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

### Variable Initialization Style in C++

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Initialize const references using the assignment operator, not parentheses. This applies to referencing data from other class objects.

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

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

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

### Set Target Properties for PVFoamReader VTK

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/vtk/CMakeLists.txt

Sets target properties for the PVFoamReader VTK library, specifically its output directory.

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

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

### Doxygen Comment for Destructor in C++ Headers

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Use '//-' for the Doxygen brief description when commenting a destructor in header files, followed by the function signature.

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

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

### Define VTK Module for PVblockMeshReader

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/vtk/CMakeLists.txt

Defines the VTK module 'PVblockMeshReader_VTK_CLASSES' and associates it with the 'vtkPVblockMeshReader' class. This is a standard way to register custom VTK classes.

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

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

### Define VTK Module for PVFoamReader

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/vtk/CMakeLists.txt

Defines the VTK module for PVFoamReader, specifying its classes.

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

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

### Splitting long line at assignment operator

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Shows the preferred way to split a long line at an assignment operator, indenting the subsequent code.

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

```

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

### Conditional Statement Formatting in C++

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Use braces for all conditional statements. Conditions can either be on the same line as 'if' or wrapped onto the next line if long, ensuring a space between 'if' and the opening parenthesis.

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

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

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

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

### Splitting function return type and name (discouraged - separate lines)

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Illustrates a discouraged method of splitting function declarations where the const keyword is on its own line.

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

```

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

### Splitting long line at assignment operator (discouraged - no indent)

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Shows a discouraged method of splitting a line at an assignment operator without proper indentation.

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

```

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

### ParaView Version Conditional Logic

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/CMakeLists.txt

Adjusts the target name and include file usage based on the ParaView version. Lower versions require specific handling.

```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()

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

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

### Stream Output Alignment

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Align stream output operators (<<) for consistent formatting. This applies to general stream output and specific warning functions.

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

```

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

```

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

### Set Target Name Based on ParaView Version

Source: https://github.com/openfoam/openfoam-10/blob/master/applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/CMakeLists.txt

Determines the target name for the plugin based on the ParaView version. Older versions (less than 5.7) prepend 'lib' to the target name.

```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()
```

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

### Splitting function return type and name (discouraged - scope resolution)

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Shows a discouraged way to split function declarations by breaking after the scope resolution operator.

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

```

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

### Centered Class Declaration Header

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Use a centered header format for class declaration comments. This ensures a consistent and readable structure for class definitions.

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

```

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

### Fully Scoped Function Name in C++ Source Files

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

In C++ source files, fully scope function names with their namespace and class. Avoid opening and closing namespaces within the same file unless dealing with multiple levels.

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

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

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

### Operator spacing for arithmetic and bitwise operations

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Defines the preferred spacing around operators for arithmetic and bitwise operations.

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

```

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

### Operator spacing for assignment and comparison operations

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Defines the preferred spacing around operators for assignment and comparison operations.

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

```

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

### Operator spacing for logical operations

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Defines the preferred spacing around operators for logical operations.

```C++
a || b, a && b

```

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

### Avoid Unnecessary Class Section Headers

Source: https://github.com/openfoam/openfoam-10/blob/master/doc/codingStyleGuide.org

Remove private member function headers if they contain no members to avoid clutter. This applies to 'Check', 'Edit', and 'Write' sections.

```c++
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

    // Check

    // Edit

    // Write

```

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