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This is a "Hello, world!" example that shows how to implement a very basic
command line interface using CLI.
The example consists of the following files:
hello.cli
Options class definition in the CLI language.
hello.hxx
hello.ixx
hello.cxx
Options class implementation in C++. These files are generated by the CLI
compiler from hello.cli using the following command line:
cli hello.cli
driver.cxx
Driver for the example. It first instantiates the option class which parses
the command line. The driver then examines the options and prints the
greeting string for each name passed as argument.
To run the example you can try the following command lines:
$ ./driver --help
$ ./driver John Jane
$ ./driver --greeting Hi --exclamations 3 John Jane
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