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 Variables public header */
27 #define HH_Variables_ 1
30 #include <boost/utility.hpp>
31 #include <boost/type_traits/is_convertible.hpp>
32 #include <boost/ref.hpp>
33 #include "ParsedCommand.hh"
35 #include "Variables.ih"
36 //#include "Variables.mpp"
37 ///////////////////////////////hh.p////////////////////////////////////////
42 class ScopedDirectoryBase;
43 template <class Variable> class VariableAttributor;
47 template <class Variable>
48 VariableAttributor<Variable> senf_console_add_node(
49 DirectoryNode & node, std::string const & name, Variable & var, int,
50 typename boost::disable_if< boost::is_convertible<Variable*, ScopedDirectoryBase*> >::type * = 0);
52 template <class Variable>
53 typename detail::VariableNodeCreator<Variable>::result_type
54 senf_console_add_node(DirectoryNode & node, std::string const & name,
55 boost::reference_wrapper<Variable> var, int);
57 template <class Variable, class Owner>
58 VariableAttributor<Variable> senf_console_add_node(
59 DirectoryNode & node, Owner & owner, std::string const & name, Variable & var, int,
60 typename boost::disable_if< boost::is_convertible<Variable*, ScopedDirectoryBase*> >::type * = 0);
64 /** \brief Variable command attributes (const)
66 \see VariableAttributor
68 template <class Variable>
69 class ConstVariableAttributor
72 typedef typename detail::QueryVariable<Variable>::Traits::Overload QueryOverload;
73 typedef typename QueryOverload::Formatter Formatter;
74 typedef OverloadedCommandNode node_type;
75 typedef ConstVariableAttributor return_type;
77 ConstVariableAttributor doc(std::string const & doc);
78 ConstVariableAttributor formatter(Formatter formatter);
81 explicit ConstVariableAttributor(QueryOverload & queryOverload);
84 QueryOverload & queryOverload_;
86 friend class detail::VariableNodeCreator<Variable const>;
89 /** \brief Variable command attributes
91 Variable commands allow to register any arbitrary variable as a command node. The variable
92 will be registered as two command overloads: One which takes a single argument of the
93 variables type to set the variable and another one taking no arguments and just querying the
94 current variable value.
97 ScopedDirectory<> dir;
102 Variables should be registered only with a ScopedDirectory declared in the same scope
103 (e.g. as a class member for member variables). This ensures, that the variable node is
104 removed from the tree when the scope is destroyed.
106 Since a variable command is added as a combination of two ordinary overloads, it is possible
107 to register additional overloads with the same name before or after registering the
110 It is also possible, to register a variable read-only. To achieve this, just wrap it with \c
111 boost::cref(). Such a variable cannot be changed only queried. Therefore, it does not have
112 the parser() and typeName() attributes.
114 dir.add("const_var", boost::cref(var))
117 \ingroup console_commands
119 template <class Variable>
120 class VariableAttributor
121 : public ConstVariableAttributor<Variable>
124 typedef typename detail::SetVariable<Variable>::Traits::Overload SetOverload;
125 typedef typename detail::ArgumentInfo<typename SetOverload::arg1_type>::Parser Parser;
126 typedef typename detail::SetVariable<Variable>::OnChangeHandler OnChangeHandler;
127 typedef OverloadedCommandNode node_type;
128 typedef VariableAttributor return_type;
130 typedef typename ConstVariableAttributor<Variable>::Formatter Formatter;
131 typedef typename ConstVariableAttributor<Variable>::QueryOverload QueryOverload;
133 VariableAttributor doc(std::string const & doc); ///< Set documentation of the variable
134 VariableAttributor formatter(Formatter formatter); ///< Set formatter
135 /**< The \a formatter must be a callable with a signature
138 void formatter(Variable const & value, std::ostream & os);
140 The \a formatter takes the return value of the call \a
141 value and writes it properly formated to \a os. */
143 VariableAttributor parser(Parser parser); ///< Set argument parser
144 /**< The parser is an arbitrary callable object with
147 void parser(senf::console::ParseCommandInfo::TokensRange const & tokens, value_type & out);
150 where \c value_type is the type of the overload
151 parameter. The parser must read and parse the complete
152 \a tokens range and return the parsed value in \a
153 out. If the parser fails, it must raise a
154 senf::console::SyntaxErrorException. */
155 VariableAttributor typeName(std::string const & name); ///< Set name of the variable type
156 VariableAttributor onChange(OnChangeHandler handler); ///< Set change callback
157 /**< The \a handler callback is called, whenever the value
158 of the variable is changed. The new value has already
159 been set, when the callback is called, the old value is
160 passed to the callback. The callback must have a
161 signature compatible to
163 void handler(Variable const & oldValue);
169 VariableAttributor(QueryOverload & queryOverload, SetOverload & setOverload,
172 SetOverload & setOverload_;
175 friend class detail::VariableNodeCreator<Variable>;
179 ///////////////////////////////hh.e////////////////////////////////////////
180 //#include "Variables.cci"
181 //#include "Variables.ct"
182 #include "Variables.cti"
189 // comment-column: 40
190 // c-file-style: "senf"
191 // indent-tabs-mode: nil
192 // ispell-local-dictionary: "american"
193 // compile-command: "scons -u test"