DebugUtil::WrapperGetOpt Class Reference

class supporting argument parsing for executing programs to debug More...

Inherits GetOpt.

Public Member Methods
	split (list< string > args, reference< list< string >> wrp_args, reference< *string > pgm_name, reference< list< string >> pgm_args)
	Parses input arguments until a standalone argument is found. More...

Detailed Description

class supporting argument parsing for executing programs to debug

When implementing a wrapper that executes a program whose name is passed on the command line, we can divide the arguments usually into 3 groups:

• internal wrapper arguments
• target program filename
• program arguments

The class support argument parsing for such a case.

Examples:

    (   # GetOpt options
        'help': 'h,help',
        'verbose': 'v,verbose',
        'listen': 'l,listen=s@',
    );
    wrapper-prog -v -l xxx xxx -v -l    # the second xxx is target program name
    wrapper-prog -v -h xxx xxx          # the first xxx is target program name
    wrapper-prog -v --listen=xxx xxx    # the second xxx is target program name
    wrapper-prog -v --listen xxx xxx    # the second xxx is target program name

Member Function Documentation

split()

DebugUtil::WrapperGetOpt::split	(	list< string >	args,
		reference< list< string >>	wrp_args,
		reference< *string >	pgm_name,
		reference< list< string >>	pgm_args
	)

Parses input arguments until a standalone argument is found.

Parameters

args	List of arguments passed to wrapper, typically ARGV
wrp_args	returns list of wrapper arguments
pgm_name	returns target program filename. "" is considered as special file name (stdin), NOTHING when no name provided
pgm_args	return List of target program arguments

Example:

hash opts = (
        'help': 'h,help',
        'verbose': 'v,verbose',
    'listen': 'l,listen=s@',
);
    WrapperGetOpt g(opts);
        list dargs;
    hash opt;
*string fileName;
        g.split(ARGV, \dargs, \fileName, \ARGV);
 
try {
    opt = g.parse2(\dargs);
} catch (hash ex) {
    stderr.printf("%s: %s\n", ex.err, ex.desc);
    help(-1);
}
 
if (exists fileName) {
    stderr.print("No input file\n");
    exit(-1);
}