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75 lines
2.7 KiB
C++
75 lines
2.7 KiB
C++
// Copyright Vladimir Prus 2004.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PROGRAM_OPTIONS_POSITIONAL_OPTIONS_VP_2004_03_02
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#define BOOST_PROGRAM_OPTIONS_POSITIONAL_OPTIONS_VP_2004_03_02
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#include <boost/program_options/config.hpp>
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#include <vector>
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#include <string>
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#if defined(BOOST_MSVC)
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# pragma warning (push)
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# pragma warning (disable:4251) // class 'std::vector<_Ty>' needs to have dll-interface to be used by clients of class 'boost::program_options::positional_options_description'
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#endif
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namespace boost { namespace program_options {
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/** Describes positional options.
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The class allows to guess option names for positional options, which
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are specified on the command line and are identified by the position.
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The class uses the information provided by the user to associate a name
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with every positional option, or tell that no name is known.
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The primary assumption is that only the relative order of the
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positional options themselves matters, and that any interleaving
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ordinary options don't affect interpretation of positional options.
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The user initializes the class by specifying that first N positional
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options should be given the name X1, following M options should be given
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the name X2 and so on.
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*/
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class BOOST_PROGRAM_OPTIONS_DECL positional_options_description {
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public:
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positional_options_description();
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/** Species that up to 'max_count' next positional options
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should be given the 'name'. The value of '-1' means 'unlimited'.
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No calls to 'add' can be made after call with 'max_value' equal to
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'-1'.
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*/
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positional_options_description&
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add(const char* name, int max_count);
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/** Returns the maximum number of positional options that can
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be present. Can return (numeric_limits<unsigned>::max)() to
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indicate unlimited number. */
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unsigned max_total_count() const;
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/** Returns the name that should be associated with positional
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options at 'position'.
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Precondition: position < max_total_count()
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*/
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const std::string& name_for_position(unsigned position) const;
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private:
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// List of names corresponding to the positions. If the number of
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// positions is unlimited, then the last name is stored in
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// m_trailing;
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std::vector<std::string> m_names;
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std::string m_trailing;
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};
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}}
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#if defined(BOOST_MSVC)
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# pragma warning (pop)
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#endif
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#endif
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