How to use offered HAL component toassemble into composition ? by generator way

Hi all, I want to build a customized RT component way like to composite other present components into a bigger sub-network.

for example, to link MATCH8 and SELECT8 to be as like swither.
I can understand it can be done and .hal way - to call up hal commands as loadrt, net...etc.

But I also wonder if it possible be done by HAL component generator way? by written .comp and compile?
I tried bit study on online document but cannot understand if any way to #include and where the reference documents.
 

Yes.
You could combine the code from each into a new component and compile it to use on your system. Just copy and paste the code and then modify it.

master's components:
github.com/LinuxCNC/linuxcnc/tree/master/src/hal/components