4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Stefan Bund <g0dil@berlios.de>
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 \brief ParsedCommand public header */
26 #ifndef HH_SENF_Scheduler_Console_ParsedCommand_
27 #define HH_SENF_Scheduler_Console_ParsedCommand_ 1
31 #define BOOST_PARAMETER_MAX_ARITY 6
34 #include <boost/type_traits/function_traits.hpp>
35 #include <boost/type_traits/is_member_function_pointer.hpp>
36 #include <boost/mpl/if.hpp>
37 #include <boost/utility.hpp>
38 #include <boost/parameter/keyword.hpp>
39 #include <boost/parameter/parameters.hpp>
40 #include <senf/config.hh>
41 #include "OverloadedCommand.hh"
43 #include <senf/Utils/type_traits.hh>
45 #include "ParsedCommand.ih"
46 #include "ParsedCommand.mpp"
47 //-/////////////////////////////////////////////////////////////////////////////////////////////////
52 namespace detail { class ArgumentInfoBase; }
54 /** \brief CommandOverload implementation with automatic argument parsing
56 ParsedCommandOverloadBase implements a CommandOverload implementation supporting automatic
57 parsing of arguments. This is \e not a node, it's a CommandOverload which is then added to
58 an OverloadedCommandNode instance.
60 Automatic argument parsing and return value processing consists of several components:
61 \li \ref overload_add Adding overload instances to the tree
62 \li (Advanced) \ref overload_parse
63 \li (Advanced) \ref overload_format
65 \section overload_add Adding argument parsing callbacks to the tree
67 To add overloads to the tree, use the senf::console::factory::Command factory:
69 namespace fty = senf::console::factory;
71 std::string taskStatus(int id);
73 senf::console::root().add("taskStatus", fty::Command(&taskStatus));
76 There are quite a number of additional parameters available to be set. These parameters are
77 documented in ParsedArgumentAttributor. Parameters are set by adding them as additional
78 calls after adding the node:
81 senf::console::root().add("taskStatus", fty::Command(&taskStatus)
82 .doc("Query the current task status")
84 description = "numeric id of task to check, -1 for the current task."
85 default_value = -1 ) );
88 You may also add an additional \c std::ostream & Argument as first argument to the
89 callback. If this argument is present, the stream connected to the console which issued the
90 command will be passed there. This allows writing arbitrary messages to the console.
92 Additionally, overloading is supported by registering multiple commands under the same
93 name. So, elaborating on above example:
95 std::string taskStatus(int id);
96 std::string taskStatus(std::string const & name);
99 .add("taskStatus", fty::Command(static_cast<std::string (*)(int)>(
101 .doc("Query the current task status")
102 .overloadDoc("Query status by id")
104 description = "numeric id of task to check, -1 for the current task."
105 default_value = -1 ) );
106 senf::console::root()
107 .add("taskStatus", fty::Command(static_cast<std::string (*)(std::string const &)>(
109 .overloadDoc("Query status by name")
111 description = "name of task to check" ) );
114 We can see here, that taking the address of an overloaded function requires a cast. If you
115 can give unique names to each of the C++ overloads (not the overloads in the console), you
116 should do so to make the unwieldy casts unnecessary.
118 \section overload_parse Custom parameter parsers
120 By default, parameters are parsed using \c boost::lexical_cast and therefore using \c
121 iostreams. This means, that any type which can be read from a stream can automatically be
122 used as argument type.
124 However, argument parsing can be configured by specializing
125 senf::console::ArgumentTraits. See that class for more information.
127 \section overload_format Custom return-value formatters
129 By default, return values are streamed to an ostream. This automatically allows any
130 streamable type to be used as return value. To add new types or customize the formating, the
131 senf::console::ReturnValueTraits template needs to be specialized for that type. See
132 that class for more information.
134 \ingroup console_commands
136 class ParsedCommandOverloadBase
137 : public CommandOverload
140 typedef boost::intrusive_ptr<ParsedCommandOverloadBase> ptr;
142 detail::ArgumentInfoBase & arg(unsigned n) const;
144 void doc(std::string const & d);
147 ParsedCommandOverloadBase();
149 template <class Type> void addParameter();
152 virtual unsigned v_numArguments() const;
153 virtual void v_argumentDoc(unsigned index, ArgumentDoc & doc) const;
154 virtual std::string v_doc() const;
156 typedef std::vector<detail::ArgumentInfoBase::ptr> Parameters;
157 Parameters parameters_;
161 /** \brief Parsed command overload
163 ParsedCommandOverload provides the command overload added to an OverloadedCommandNode for an
164 automatically parsed command.
166 This class is normally instantiated automatically when adding a function or member-function
167 pointer as callback to the tree. Manually instantiation this type of overload is \e not
168 simple, since the function signature has to be manipulated correctly to support the optional
169 \c std::ostream first argument.
171 \implementation This class is specialized for each supported number of command arguments.
173 \todo Implement automatic binding of member functions for parser and formatter
175 template <class FunctionTraits, class ReturnType, unsigned arity>
176 class ParsedCommandOverload : public ParsedCommandOverloadBase
179 typedef boost::intrusive_ptr<ParsedCommandOverload> ptr;
184 # define BOOST_PP_ITERATION_PARAMS_1 \
185 (4, (0, SENF_CONSOLE_MAX_COMMAND_ARITY, \
186 SENF_ABSOLUTE_INCLUDE_PATH(Utils/Console/ParsedCommand.mpp), \
188 # include BOOST_PP_ITERATE()
192 /** \brief Generic ParsedCommandOverloadBase attributes
194 Attributes for parsed commands are not set directly on the node. They are set via a special
195 attributor temporary returned when adding a parsed command to the tree.
197 This class is the base class for those attributors. It provides members which do not depend
198 in any way on the exact type of command added.
200 \see \ref console_autoparse
202 class ParsedCommandAttributorBase
203 : public detail::NodeFactory
206 typedef OverloadedCommandNode node_type;
207 typedef OverloadedCommandNode & result_type;
210 ParsedCommandAttributorBase(ParsedCommandOverloadBase::ptr overload, unsigned index);
211 ParsedCommandAttributorBase(ParsedCommandAttributorBase const & other, unsigned index);
213 void argName(std::string const & name);
214 void argDoc(std::string const & doc);
215 void typeName(std::string const & doc);
216 void defaultDoc(std::string const & doc);
218 ParsedCommandOverloadBase & overload() const;
219 void overloadDoc(std::string const & doc);
220 void nodeDoc(std::string const & doc);
221 void shortDoc(std::string const & doc);
224 OverloadedCommandNode & create(DirectoryNode & dir, std::string const & name) const;
226 ParsedCommandOverloadBase::ptr overload_;
228 boost::optional<std::string> doc_;
229 boost::optional<std::string> shortdoc_;
231 friend class senf::console::DirectoryNode;
234 /** \brief Non argument dependent ParsedCommandBase attributes
236 Attributes for parsed commands are not set directly on the node. They are set via a special
237 attributor temporary returned when adding a parsed command to the tree.
239 This class adds all those members, which do depend on the type of command added (and thereby
240 on that commands signature) but do not depend on the type of any single argument.
242 \see \ref console_autoparse
244 template <class Overload>
245 class ParsedCommandAttributor
246 : public ParsedCommandAttributorBase
249 Overload & overload() const; ///< Get the command overload
252 ParsedCommandAttributor(typename Overload::ptr overload, unsigned index);
253 ParsedCommandAttributor(ParsedCommandAttributorBase const & other, unsigned index);
258 /** \brief Keyword argument tags
260 The tags defined in this namespace are used as keyword arguments via the <a
261 href="http://www.boost.org/doc/libs/release/libs/parameter/doc/html/index.html">Boost.Parameter</a>
264 For the keyword tags, the standard C++ scoping rules apply
266 namespace fty=senf::console::factory;
268 // Either qualify them with their complete namespace
269 dir.add(..., fty::Command(...)
270 .arg( senf::console::kw::name = "name" ) );
272 // Or use a namespace alias
273 namespace kw = senf::console::kw;
274 dir.add(..., fty::Command(...)
275 .arg( kw::name = "name" ) );
277 // Or import the keywords into the current namespace (beware of name collisions)
278 using namespace senf::console::kw;
279 dir.add(..., fty::Command(...)
280 .arg( name = "name" ) );
283 The second alternative is preferred, the <tt>using namespace</tt> directive may be used as
284 long as the keyword names do not clash with another visible symbol.
286 \section kw_attributes Argument attribute values
288 The keywords are used to set argument attributes. The keywords \ref default_value and \ref
289 parser influence, how an argument is parsed/interpreted whereas \ref name, \ref description,
290 \ref type_name and \ref default_doc are used to change the arguments documentation:
294 dir.add("command", fty::Command(&command)
295 .arg( kw::name = "name",
296 kw::description = "description",
297 kw::default_value = 1,
298 kw::type_name = "type_name",
299 kw::default_doc = "default_doc" ) );
301 Will create the following documentation:
305 command [name:type_name]
313 \see \ref senf::console::ParsedArgumentAttributor::arg()
315 \ingroup console_commands
318 BOOST_PARAMETER_KEYWORD(type, name) ///< Argument name
319 /**< Sets the displayed name of the argument. */
320 BOOST_PARAMETER_KEYWORD(type, description) ///< One-line argument description
321 /**< This description is shown in the argument
322 reference. If several overloads have same-named
323 arguments, only one of them should be documented. This
324 documentation then applies to all arguments of that
326 BOOST_PARAMETER_KEYWORD(type, default_value) ///< Argument default value
327 /**< If a default value is specified for an argument, that
328 argument is optional. If an overload is called with
329 fewer arguments than defined, optional values will be
330 used beginning at the last optional argument and going
331 forward until all arguments have values assigned. E.g.,
332 an overload with 5 parameters \a a - \a e with two
335 command a:int [b:int] c:int [d:int] e:int
337 When calling the overload, the arguments will be
338 assigned in the following way:
339 <table class="senf fixedwidth">
341 <td style="whitespace:no-wrap"><tt>command 1 2</tt></td>
342 <td colspan="5">SyntaxErrorException: invalid number of
346 <td style="white-space:nowrap"><tt>command 1 2 3</tt></td>
347 <td style="width:6em">\a a = 1</td><td style="width:6em">\a b = \e default</td><td style="width:6em">\a c = 2</td><td style="width:6em">\a d = \e default</td><td style="width:6em">\a e = 3</td>
350 <td style="white-space:nowrap"><tt>command 1 2 3 4</tt></td>
351 <td>\a a = 1</td><td>\a b = 2</td><td>\a c = 3</td><td>\a d = \e default</td><td>\a e = 4</td>
354 <td style="white-space:nowrap"><tt>command 1 2 3 4 5</tt></td>
355 <td>\a a = 1</td><td>\a b = 2</td><td>\a c = 3</td><td>\a d = 4</td><td>\a e = 5</td>
358 <td style="white-space:nowrap"><tt>command 1 2 3 4 5 6</tt></td>
359 <td colspan="5">SyntaxErrorException: invalid number of
363 So, if you use default values as you are used to,
364 assigning default values to consecutive trailing
365 arguments, they work like they do in C++ and most other
367 BOOST_PARAMETER_KEYWORD(type, type_name) ///< Type name of this arguments type
368 /**< By default, the type of an argument is extracted from
369 the C++ type name by taking the last component of the
370 fully scoped name. This value can be changed by setting
372 BOOST_PARAMETER_KEYWORD(type, default_doc) ///< String rep of default value
373 /**< By default, the default value is documented by
374 converting the value to it's string representation
375 using the corresponding return value formatter which by
376 default uses \c boost::lexical_cast / \c iostreams. The
377 displayed value can be changed by setting this
379 BOOST_PARAMETER_KEYWORD(type, parser) ///< Argument parser
380 /**< The argument parser is used to convert the argument
381 token list returned by the console/config parser into
382 the appropriate value. If not set explicitly, this
383 conversion is supplied by the ArgumentTraits
386 Setting the \a parser attribute allows to use a custom
387 parser. The parser is an arbitrary callable object with
390 void parser(senf::console::ParseCommandInfo::TokensRange const & tokens, value_type & out);
392 where \c value_type is the type of the overload
393 parameter. The parser must read and parse the complete
394 \a tokens range and return the parsed value in \a
395 out. If the parser fails, it must raise a
396 senf::console::SyntaxErrorException. */
399 /** \brief Derived class dependent ParsedCommandBase attributes
401 Attributes for parsed commands are not set directly on the node. They are set via a special
402 attributor temporary returned when adding a parsed command to the tree.
404 This class adds all those members, which do not depend on any specific argument but which
405 need to return the correct attributor type.
407 \see \ref console_autoparse
409 template <class Overload, class Self, class ReturnType=typename Overload::traits::result_type>
410 class ParsedArgumentAttributorBase
411 : public ParsedCommandAttributor<Overload>
414 Self doc(std::string const & doc); ///< Set documentation for all overloads
415 Self shortdoc(std::string const & doc); ///< Set short documentation for all overloads
416 Self overloadDoc(std::string const & doc); ///< Set overload specific documentation
417 Self formatter(typename Overload::Formatter formatter);
418 ///< Set return value formatter
419 /**< This member is only available, if the \a ReturnType of
420 the installed callback is not \c void.
422 If \a ReturnType is not \c void, the \a formatter must
423 be a callable with a signature compatible with
425 void formatter(ReturnType const & value, std::ostream & os);
427 The \a formatter takes the return value of the call \a
428 value and writes it properly formated to \a os. */
431 ParsedArgumentAttributorBase(typename Overload::ptr overload, unsigned index);
432 ParsedArgumentAttributorBase(ParsedCommandAttributorBase const & other, unsigned index);
439 template <class Overload, class Self>
440 class ParsedArgumentAttributorBase<Overload, Self, void>
441 : public ParsedCommandAttributor<Overload>
444 Self doc(std::string const & doc); ///< Set documentation for all overloads
445 Self shortdoc(std::string const & doc); ///< Set short documentation for all overloads
446 Self overloadDoc(std::string const & doc); ///< Set overload specific documentation
449 ParsedArgumentAttributorBase(typename Overload::ptr overload, unsigned index);
450 ParsedArgumentAttributorBase(ParsedCommandAttributorBase const & other, unsigned index);
457 /** \brief Argument dependent ParsedCommandBase attributes
459 Attributes for parsed commands are not set directly on the node. They are set via a special
460 attributor temporary returned when adding a parsed command to the tree.
462 This class adds all those members, which depend on a specific argument. Each call to \c arg
463 will advance to the next argument.
465 \see \ref console_autoparse
467 template <class Overload, unsigned index, bool flag>
468 class ParsedArgumentAttributor
469 : public ParsedArgumentAttributorBase< Overload,
470 ParsedArgumentAttributor<Overload, index, flag> >
472 typedef boost::parameter::parameters<
474 kw::type::description,
475 kw::type::default_value,
477 kw::type::default_doc,
478 kw::type::parser> arg_params;
481 typedef typename senf::function_traits_arg_type<
482 typename Overload::traits, int(index) >::type arg_type;
483 typedef typename senf::remove_cvref< arg_type >::type value_type;
484 typedef ParsedArgumentAttributor<Overload, index+1> next_type;
486 next_type arg() const; ///< Set argument attributes
487 /**< This member changes the attributes for the current
488 argument. The attributes are passed to arg() as keyword
489 arguments using the <a
490 href="http://www.boost.org/doc/libs/release/libs/parameter/doc/html/index.html">Boost.Parameter</a>
494 .arg( kw::name = "name",
495 kw::default_value = 1 )
498 The valid keywords are defined in the senf::console::kw
501 Each call to arg() will increment the argument index
502 and advance to the next argument. This member is only
503 present, if there is an argument at the current
508 # define BOOST_PP_ITERATION_PARAMS_1 \
509 (4, (1, BOOST_PARAMETER_MAX_ARITY, \
510 SENF_ABSOLUTE_INCLUDE_PATH(Utils/Console/ParsedCommand.mpp), \
512 # include BOOST_PP_ITERATE()
517 explicit ParsedArgumentAttributor(typename Overload::ptr overload);
518 explicit ParsedArgumentAttributor(ParsedCommandAttributorBase const & other);
520 template <class ArgumentPack>
521 next_type argInfo(ArgumentPack const & args);
522 template <class Kw, class ArgumentPack>
523 void argInfo(Kw const &, ArgumentPack const &, boost::mpl::false_);
525 template <class ArgumentPack>
526 void argInfo(boost::parameter::keyword<kw::type::name> const &,
527 ArgumentPack const & args, boost::mpl::true_);
528 template <class ArgumentPack>
529 void argInfo(boost::parameter::keyword<kw::type::description> const &,
530 ArgumentPack const & args, boost::mpl::true_);
531 template <class ArgumentPack>
532 void argInfo(boost::parameter::keyword<kw::type::default_value> const &,
533 ArgumentPack const & args, boost::mpl::true_);
534 template <class ArgumentPack>
535 void argInfo(boost::parameter::keyword<kw::type::type_name> const &,
536 ArgumentPack const & args, boost::mpl::true_);
537 template <class ArgumentPack>
538 void argInfo(boost::parameter::keyword<kw::type::default_doc> const &,
539 ArgumentPack const & args, boost::mpl::true_);
540 template <class ArgumentPack>
541 void argInfo(boost::parameter::keyword<kw::type::parser> const &,
542 ArgumentPack const & args, boost::mpl::true_);
544 next_type next() const;
546 void defaultValue(value_type const & value);
547 template <class Fn> void parser(Fn fn);
549 template <class O, unsigned i, bool f>
550 friend class ParsedArgumentAttributor;
552 friend class detail::ParsedCommandAddNodeAccess;
557 template <class Overload, unsigned index>
558 class ParsedArgumentAttributor<Overload, index, false>
559 : public ParsedArgumentAttributorBase< Overload,
560 ParsedArgumentAttributor<Overload, index, false> >
563 typedef OverloadedCommandNode node_type;
564 typedef ParsedArgumentAttributor return_type;
567 explicit ParsedArgumentAttributor(typename Overload::ptr overload);
568 explicit ParsedArgumentAttributor(ParsedCommandAttributorBase const & other);
570 template <class O, unsigned i, bool f>
571 friend class ParsedArgumentAttributor;
573 friend class detail::ParsedCommandAddNodeAccess;
582 /** \brief OverloadedCommandNode factory
584 This factory will create new OverloadedCommandNode instances <em>or add new overloads</em>
585 to an existing OverloadedCommandNode. The factory supports automatic argument parsing.
587 Commands are added to the tree using
589 namespace fty = senf::console::factory;
590 node.add("name", fty::Command(function));
593 The Command factory supports the following features:
594 \li Automatic argument parsing
595 \li Automatic binding of member functions. Pass the owning instance as second argument to
597 \li Conversion to a compatible signature. Pass the signature as template argument to the
600 If the signature of the command added matches
602 void (std::ostream &, senf::console::ParsedCommandInfo const &)
604 The command is added using manual argument parsing, otherwise it is added using automatic
607 See the <a href="classsenf_1_1console_1_1factory_1_1Command-members.html">List of all
608 members</a> for additional attributes.
610 \note This class is for exposition only, the real interface consists of several overloaded
613 \see \ref console_manualparse \n
614 \ref console_autoparse
616 class Command : public ParsedArgumentAttributor
619 typedef OverloadedCommandNode node_type;
620 typedef unspecified result_type;
622 Command(unspecified fn); ///< Create a node calling \a fn
623 template <class Signature>
624 Command(unspecified fn); ///< Create a node calling \a fn with signature \a Signature
625 /**< The given \a Signature must be compatible with \a fn
626 for each argument and the return value. */
628 Command(member_function_pointer fn, Owner const * owner);
629 ///< Create a node calling member function \a fn on \a owner
630 template <class Signature>
631 Command(member_function_pointer fn, Owner const * owner);
632 ///< Create a node calling member function \a fn on \a owner
633 /// with the given \a Signature
634 /**< The given \a Signature must be compatible with \a fn
635 for each argument and the return value. */
641 template <class Signature>
642 SimpleOverloadAttributor
643 Command(boost::function<Signature> fn,
644 typename boost::enable_if_c<detail::ParsedCommandTraits<Signature>::is_simple>::type * = 0);
646 template <class Function>
647 SimpleOverloadAttributor
649 typename boost::enable_if_c<detail::ParsedCommandTraits<Function>::is_simple>::type * = 0);
651 template <class Owner, class Member>
652 SimpleOverloadAttributor
653 Command(Member memfn, Owner * owner,
654 typename boost::enable_if<boost::is_member_function_pointer<Member> >::type * = 0,
655 typename boost::enable_if_c<detail::ParsedCommandTraits<Member>::is_simple>::type * = 0);
657 template <class Owner, class Member>
658 SimpleOverloadAttributor
659 Command(Member memfn, Owner const * owner,
660 typename boost::enable_if<boost::is_member_function_pointer<Member> >::type * = 0,
661 typename boost::enable_if_c<detail::ParsedCommandTraits<Member>::is_simple>::type * = 0);
663 template <class CastTo, class Signature>
664 typename senf::console::detail::ParsedCommandTraits<CastTo>::Attributor
665 Command(boost::function<Signature> fn);
667 template <class CastTo, class Function>
668 typename senf::console::detail::ParsedCommandTraits<CastTo>::Attributor
670 typename boost::enable_if_c<detail::ParsedCommandTraits<Function>::is_callable>::type * = 0,
671 typename boost::disable_if<boost::is_member_function_pointer<Function> >::type * = 0);
673 template <class Signature>
674 typename senf::console::detail::ParsedCommandTraits<Signature>::Attributor
675 Command(boost::function<Signature> fn);
677 template <class Function>
678 typename senf::console::detail::ParsedCommandTraits<Function>::Attributor
680 typename boost::enable_if_c<detail::ParsedCommandTraits<Function>::is_callable>::type * = 0,
681 typename boost::disable_if<boost::is_member_function_pointer<Function> >::type * = 0);
683 template <class Owner, class Member>
684 typename senf::console::detail::ParsedCommandTraits<Member>::Attributor
685 Command(Member memfn, Owner * owner,
686 typename boost::enable_if<boost::is_member_function_pointer<Member> >::type * = 0);
688 template <class Owner, class Member>
689 typename senf::console::detail::ParsedCommandTraits<Member>::Attributor
690 Command(Member memfn, Owner const * owner,
691 typename boost::enable_if<boost::is_member_function_pointer<Member> >::type * = 0);
693 template <class CastTo, class Owner, class Member>
694 typename senf::console::detail::ParsedCommandTraits<CastTo>::Attributor
695 Command(Member memfn, Owner * owner,
696 typename boost::enable_if<boost::is_member_function_pointer<Member> >::type * = 0);
698 template <class CastTo, class Owner, class Member>
699 typename senf::console::detail::ParsedCommandTraits<CastTo>::Attributor
700 Command(Member memfn, Owner const * owner,
701 typename boost::enable_if<boost::is_member_function_pointer<Member> >::type * = 0);
707 //-/////////////////////////////////////////////////////////////////////////////////////////////////
708 #include "ParsedCommand.cci"
709 #include "ParsedCommand.ct"
710 #include "ParsedCommand.cti"
717 // comment-column: 40
718 // c-file-style: "senf"
719 // indent-tabs-mode: nil
720 // ispell-local-dictionary: "american"
721 // compile-command: "scons -u test"