DebugCmdLine::WrapperGetOpt Class Reference

Inherits GetOpt.

Public Member Methods
	constructor (hash options)
	create the object with the given GetOpt option hash
	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

When implementing a wrapper which executes program whose name is passed at command line then we can divide arguments usually into 3 groups, internal wrapper arguments, target program filename and 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 trg -v -l # trg is the target program name wrapper-prog -v -h trg xxx # trg is the target program name wrapper-prog -v –listen=xxx trg # trg is the target program name wrapper-prog -v –listen xxx trg # trg is the target program name

Member Function Documentation

split()

DebugCmdLine::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 the target program filename; "" is considered a special file name (meaning 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<ExceptionInfo> ex) {
    stderr.printf("%s: %s\n", ex.err, ex.desc);
    help(-1);
}
 
if (exists fileName) {
    stderr.print("No input file\n");
    exit(-1);
}