Options and input processing for Fortran
options.f90 is a Fortran module for defining and parsing command-line options and input parameters for Fortran programs. Its design is inspired by Python's optparse module. Some features:
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Allows definition of options/parameters (real, integer, logical, string, and flags) corresponding to natural Fortran types, with names and descriptions
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Automates reading option values from the command line and input parameters from file
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Supports long options (e.g. --myopt) and short options (-m), as well as combining several short options (e.g. -v -c is the same as -vc)
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Performs rigorous input validation & other error checking
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Supports default values for all option types, and lower & upper bounds on numerical options
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Can print nice descriptions of available options, with line wrapping as necessary
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Designed to be easily extended with new option types
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Well-tested and carefully coded (much of the code has been formally verified)
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Easy to use
For more info, see http://infty.net/options/options.html
To Do
Some goals for future versions of this library:
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Include support for commands, rather than just options, on the command line.
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Create a mechanism for automatically generating a help message, given a short description of the program.