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// cmdline_parse.h
//
// Copyright 2002 Daniel Burrows
//
// Mad? They said I was mad. But I didn't listen. I didn't have to...
//
// Behold...the living horror of the object-oriented command-line parser!
#ifndef CMDLINE_PARSE_H
#define CMDLINE_PARSE_H
#include <vector>
#include <std::string>
#include <sigc++/trackable.h>
// I'll parse arguments My Way, thank you.
//
// This provides a callback to parse the head of an input option stream.
//
// It should either:
// (a) Consume some number of arguments and return true (if there are
// appropriate arguments), or
// (b) Return false.
class arg_parser:public sigc::trackable
{
public:
virtual bool parse_arg(int argc, char *argv[], int &loc)=0;
};
// Caller is responsible for deleting the arg_parsers
bool parse_cmdline(std::vector<arg_parser *> parsers, int argc, char *argv[]);
// Factories for interesting basic arg_parsers. These generally take either
// a slot to call or a value to set.
// The standard '-x', '--blah' option. (no value) If longopt is NULL, there
// is no long option; if shortopt is \0, same.
arg_parser *dashopt(char shortopt, char *longopt,
sigc::slot0<void> callback);
// Same, sets "flag" to true if the option is seen.
arg_parser *dashopt(char shortopt, char *longopt, bool &flag);
// The general callback-based version; the multiple forms allow
// implicit conversions.
arg_parser *dashopt_witharg(char shortopt, char *longopt,
sigc::slot1<void, std::string> callback);
arg_parser *dashopt_witharg(char shortopt, char *longopt,
std::string &val);
arg_parser *dashopt_witharg(char shortopt, char *longopt,
int &val);
// This one just accumulates its arguments in the given vector.
// Useful as a "default rule".
arg_parser *arg_accumulate();
#endif
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