gnu_style {optigrab}

GNU-style command line options

Description

Functions for enabling GNU-style commpand-line option behavior.

Usage

gnu_style

Format

An object of class list of length 3.

Details

Functions for enabling GNU-style command-line options. GNU-style options are characterized by a single dash (-) before single character option flags and a double dash (--) before multiple character option flags.

By convention, gnu style options flags must begin with a letter; if numbers were allowed option flags would be ambiguous with negative option values.

References

[GNU Command Line Standards]http://www.gnu.org/prep/standards/standards.html

See Also

• Non-exported function *_flag_test, *_flag_to_name and *_name_to_flag

• gnu_style

• java_style

• ms_style