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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2005, 2006 Ciaran McCreesh <ciaranm@ciaranm.org>
+ * Copyright (c) 2006 Stephen Bennett <spb@gentoo.org>
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef PALUDIS_GUARD_ARGS_ARGS_OPTION_HH
+#define PALUDIS_GUARD_ARGS_ARGS_OPTION_HH 1
+
+#include <paludis/args/args_visitor.hh>
+#include <paludis/util/private_implementation_pattern.hh>
+
+/** \file
+ * Declaration for ArgsOption.
+ *
+ * \ingroup grplibpaludisargs
+ */
+
+namespace paludis
+{
+ namespace args
+ {
+ class ArgsGroup;
+
+ /**
+ * Base class for a command line option.
+ *
+ * \ingroup grplibpaludisargs
+ */
+ class PALUDIS_VISIBLE ArgsOption :
+ public virtual VisitableInterface<ArgsVisitorTypes>
+ {
+ friend class ArgsHandler;
+
+ private:
+ ArgsGroup * const _group;
+
+ const std::string _long_name;
+ const char _short_name;
+ const std::string _description;
+
+ bool _specified;
+
+ ArgsOption(const ArgsOption &);
+ void operator= (const ArgsOption &);
+
+ protected:
+ /**
+ * Constructor.
+ */
+ ArgsOption(ArgsGroup * const, const std::string & long_name,
+ const char short_name, const std::string & description);
+
+ /**
+ * Destructor.
+ */
+ ~ArgsOption();
+
+ public:
+ /**
+ * Fetch our long name.
+ */
+ const std::string & long_name() const
+ {
+ return _long_name;
+ }
+
+ /**
+ * Fetch our short name (may be 0).
+ */
+ char short_name() const
+ {
+ return _short_name;
+ }
+
+ /**
+ * Fetch our description.
+ */
+ const std::string & description() const
+ {
+ return _description;
+ }
+
+ /**
+ * Fetch whether or not we were specified on the
+ * command line.
+ */
+ virtual bool specified() const
+ {
+ return _specified;
+ }
+
+ /**
+ * Set the value returned by specified().
+ */
+ virtual void set_specified(const bool value)
+ {
+ _specified = value;
+ }
+
+ /**
+ * Fetch our group.
+ */
+ ArgsGroup * group()
+ {
+ return _group;
+ }
+ };
+
+ /**
+ * A SwitchArg is an option that can either be specified or not
+ * specified, and that takes no value (for example, --help).
+ *
+ * \ingroup grplibpaludisargs
+ */
+ class PALUDIS_VISIBLE SwitchArg :
+ public ArgsOption,
+ public Visitable<SwitchArg, ArgsVisitorTypes>
+ {
+ public:
+ /**
+ * Constructor.
+ */
+ SwitchArg(ArgsGroup * const group, std::string long_name, char short_name,
+ std::string description);
+
+ ~SwitchArg();
+ };
+
+ /**
+ * An option that takes a string argument.
+ *
+ * \ingroup grplibpaludisargs
+ */
+ class PALUDIS_VISIBLE StringArg :
+ public ArgsOption,
+ public Visitable<StringArg, ArgsVisitorTypes>
+ {
+ private:
+ std::string _argument;
+
+ public:
+ /**
+ * Constructor
+ */
+ StringArg(ArgsGroup * const, const std::string & long_name,
+ const char short_name, const std::string & description);
+
+ /**
+ * Fetch the argument that was given to this option.
+ */
+ const std::string& argument() const { return _argument; }
+
+ /**
+ * Set the argument returned by argument().
+ */
+ void set_argument(const std::string& arg) { _argument = arg; }
+ };
+
+ /**
+ * An option that takes a set of strings.
+ *
+ * \ingroup grplibpaludisargs
+ */
+ class PALUDIS_VISIBLE StringSetArg :
+ public ArgsOption,
+ public Visitable<StringSetArg, ArgsVisitorTypes>,
+ private PrivateImplementationPattern<StringSetArg>
+ {
+ public:
+ ///\name Basic operations
+ ///\{
+
+ StringSetArg(ArgsGroup * const, const std::string & long_name,
+ const char short_name, const std::string & description);
+
+ ~StringSetArg();
+
+ ///\}
+
+ ///\name Iterate over our args.
+ ///\{
+
+ typedef libwrapiter::ForwardIterator<StringArg, const std::string> Iterator;
+
+ Iterator args_begin() const;
+
+ Iterator args_end() const;
+
+ ///\}
+
+ /**
+ * Add an argument to the set.
+ */
+ void add_argument(const std::string & arg);
+ };
+
+
+ /**
+ * An AliasArg is an alias for another argument.
+ *
+ * \ingroup grplibpaludisargs
+ */
+ class PALUDIS_VISIBLE AliasArg :
+ public ArgsOption,
+ public Visitable<AliasArg, ArgsVisitorTypes>
+ {
+ private:
+ ArgsOption * const _other;
+
+ public:
+ /**
+ * Constructor.
+ */
+ AliasArg(ArgsOption * const other, const std::string & new_long_name);
+
+ virtual bool specified() const
+ {
+ return _other->specified();
+ }
+
+ virtual void set_specified(const bool value)
+ {
+ _other->set_specified(value);
+ }
+ };
+
+ /**
+ * An option that takes an integer argument.
+ *
+ * \ingroup grplibpaludisargs
+ */
+ class PALUDIS_VISIBLE IntegerArg :
+ public ArgsOption,
+ public Visitable<IntegerArg, ArgsVisitorTypes>
+ {
+ private:
+ int _argument;
+
+ public:
+ /**
+ * Constructor
+ */
+ IntegerArg(ArgsGroup * const, const std::string & long_name,
+ const char short_name, const std::string & description);
+ /**
+ * Fetch the argument that was given to this option.
+ */
+ int argument() const { return _argument; }
+
+ /**
+ * Set the argument returned by argument().
+ */
+ void set_argument(const int arg) { _argument = arg; }
+ };
+
+ /**
+ * An option that takes one of a predefined set of string arguments.
+ *
+ * \ingroup grplibpaludisargs
+ */
+ class PALUDIS_VISIBLE EnumArg :
+ public ArgsOption,
+ public Visitable<EnumArg, ArgsVisitorTypes>,
+ private PrivateImplementationPattern<EnumArg>
+ {
+ private:
+ std::string _argument;
+ const std::string _default_arg;
+
+ public:
+
+ /**
+ * Helper class for passing available options and associated descriptions
+ * to the EnumArg constructor.
+ *
+ * \ingroup grplibpaludisargs
+ */
+ class PALUDIS_VISIBLE EnumArgOptions :
+ private PrivateImplementationPattern<EnumArgOptions>
+ {
+ friend class EnumArg;
+
+ public:
+ /**
+ * Constructor
+ */
+ EnumArgOptions(const std::string, const std::string);
+
+ /**
+ * Destructor.
+ */
+ ~EnumArgOptions();
+
+ /**
+ * Adds another (option, description) pair.
+ */
+ EnumArgOptions & operator() (const std::string, const std::string);
+ };
+
+ /**
+ * Constructor.
+ */
+ EnumArg(ArgsGroup * const group, const std::string & long_name,
+ const char short_name, const std::string & description,
+ const EnumArgOptions & opts, const std::string & default_arg);
+
+ ~EnumArg();
+
+ /**
+ * Fetch the argument that was given to this option.
+ */
+ const std::string & argument() const
+ {
+ return _argument;
+ }
+
+ /**
+ * Set the argument returned by argument(), having verified that
+ * it is one of the arguments allowed for this option.
+ */
+ void set_argument(const std::string & arg);
+
+ /**
+ * Fetch the default option, as specified to the constructor.
+ */
+ const std::string & default_arg() const
+ {
+ return _default_arg;
+ }
+
+ ///\name Iterate over our allowed arguments and associated descriptions
+ ///\{
+
+ typedef libwrapiter::ForwardIterator<EnumArg,
+ const std::pair<std::string, std::string> > AllowedArgIterator;
+
+ AllowedArgIterator begin_allowed_args() const;
+
+ AllowedArgIterator end_allowed_args() const;
+
+ ///\}
+ };
+ }
+}
+
+#endif