Command-Line Options and the std.getopt Module
Explore how to use the std.getopt module in D to parse command-line options effectively. Understand the difference between options and parameters, handle short and long forms, and convert argument types. This lesson helps you create flexible command-line programs with minimal manual parsing.
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In the previous lesson, you learned all there is to know about the parameters and the return value of main(). However, parsing the arguments is a repetitive task. The std.getopt module is designed to help with parsing the command line options of programs.
Command-line options #
Some parameters like “world” and “hello” are purely data for the program to use. Other kinds of parameters are called command-line options and are used to change the behaviors of programs. An example of a command-line option is the -l option. ...