A methodology for creating large modules

The concept is that you start with a base source routine that contains more-or-less normal source. This source also contains a number of tokens that start with "$". Make_rood replaces these tokens with strings that are dependent on things such as the data type for which a routine is being built and the ranks of the input and output arrays. The replacement of tokens is done a number of times, creating a collection of subroutines for all the data types and ranks of interest. Make_rood outputs a module that contains all the required header information and the collection of specific routines. From a single common routine you can create a module that might contain hundreds of specific routines.