Modules - Procedure Declaration

Placing interfaces in modules for visibility purposes has the following problems,

• procedures may be inter-related and hence call one another;
• the procedure interfaces need to be explicit to one another;
• using the module means that each procedure would contain its own interface declaration which is an error.

    SUBROUTINE Sub1(A,B,C)
     USE my_interfaces ! contains Sub1 stuff
      ...

The solution to this is to package the actual procedures in the module; the interfaces become visible and the above problems are solved.

These are now called module procedures and are encapsulated into the module.

For more information, click here