294 lines
11 KiB
Plaintext
294 lines
11 KiB
Plaintext
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// Copyright Vladimir Prus 2002-2004.
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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_PARSERS_VP_2003_05_19
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#define BOOST_PARSERS_VP_2003_05_19
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#include <boost/program_options/config.hpp>
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#include <boost/program_options/option.hpp>
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#include <boost/program_options/detail/cmdline.hpp>
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#include <boost/function/function1.hpp>
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#include <iosfwd>
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#include <vector>
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#include <utility>
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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::basic_parsed_options<wchar_t>'
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#endif
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namespace boost { namespace program_options {
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class options_description;
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class positional_options_description;
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/** Results of parsing an input source.
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The primary use of this class is passing information from parsers
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component to value storage component. This class does not makes
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much sense itself.
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*/
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template<class charT>
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class basic_parsed_options {
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public:
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explicit basic_parsed_options(const options_description* xdescription, int options_prefix = 0)
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: description(xdescription), m_options_prefix(options_prefix) {}
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/** Options found in the source. */
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std::vector< basic_option<charT> > options;
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/** Options description that was used for parsing.
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Parsers should return pointer to the instance of
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option_description passed to them, and issues of lifetime are
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up to the caller. Can be NULL.
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*/
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const options_description* description;
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/** Mainly used for the diagnostic messages in exceptions.
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* The canonical option prefix for the parser which generated these results,
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* depending on the settings for basic_command_line_parser::style() or
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* cmdline::style(). In order of precedence of command_line_style enums:
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* allow_long
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* allow_long_disguise
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* allow_dash_for_short
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* allow_slash_for_short
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*/
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int m_options_prefix;
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};
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/** Specialization of basic_parsed_options which:
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- provides convenient conversion from basic_parsed_options<char>
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- stores the passed char-based options for later use.
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*/
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template<>
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class BOOST_PROGRAM_OPTIONS_DECL basic_parsed_options<wchar_t> {
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public:
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/** Constructs wrapped options from options in UTF8 encoding. */
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explicit basic_parsed_options(const basic_parsed_options<char>& po);
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std::vector< basic_option<wchar_t> > options;
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const options_description* description;
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/** Stores UTF8 encoded options that were passed to constructor,
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to avoid reverse conversion in some cases. */
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basic_parsed_options<char> utf8_encoded_options;
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/** Mainly used for the diagnostic messages in exceptions.
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* The canonical option prefix for the parser which generated these results,
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* depending on the settings for basic_command_line_parser::style() or
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* cmdline::style(). In order of precedence of command_line_style enums:
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* allow_long
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* allow_long_disguise
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* allow_dash_for_short
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* allow_slash_for_short
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*/
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int m_options_prefix;
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};
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typedef basic_parsed_options<char> parsed_options;
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typedef basic_parsed_options<wchar_t> wparsed_options;
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/** Augments basic_parsed_options<wchar_t> with conversion from
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'parsed_options' */
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typedef function1<std::pair<std::string, std::string>, const std::string&> ext_parser;
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/** Command line parser.
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The class allows one to specify all the information needed for parsing
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and to parse the command line. It is primarily needed to
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emulate named function parameters \-- a regular function with 5
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parameters will be hard to use and creating overloads with a smaller
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number of parameters will be confusing.
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For the most common case, the function parse_command_line is a better
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alternative.
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There are two typedefs \-- command_line_parser and wcommand_line_parser,
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for charT == char and charT == wchar_t cases.
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*/
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template<class charT>
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class basic_command_line_parser : private detail::cmdline {
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public:
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/** Creates a command line parser for the specified arguments
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list. The 'args' parameter should not include program name.
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*/
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basic_command_line_parser(const std::vector<
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std::basic_string<charT> >& args);
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/** Creates a command line parser for the specified arguments
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list. The parameters should be the same as passed to 'main'.
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*/
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basic_command_line_parser(int argc, const charT* const argv[]);
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/** Sets options descriptions to use. */
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basic_command_line_parser& options(const options_description& desc);
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/** Sets positional options description to use. */
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basic_command_line_parser& positional(
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const positional_options_description& desc);
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/** Sets the command line style. */
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basic_command_line_parser& style(int);
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/** Sets the extra parsers. */
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basic_command_line_parser& extra_parser(ext_parser);
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/** Parses the options and returns the result of parsing.
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Throws on error.
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*/
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basic_parsed_options<charT> run();
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/** Specifies that unregistered options are allowed and should
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be passed though. For each command like token that looks
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like an option but does not contain a recognized name, an
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instance of basic_option<charT> will be added to result,
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with 'unrecognized' field set to 'true'. It's possible to
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collect all unrecognized options with the 'collect_unrecognized'
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funciton.
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*/
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basic_command_line_parser& allow_unregistered();
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using detail::cmdline::style_parser;
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basic_command_line_parser& extra_style_parser(style_parser s);
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private:
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const options_description* m_desc;
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};
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typedef basic_command_line_parser<char> command_line_parser;
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typedef basic_command_line_parser<wchar_t> wcommand_line_parser;
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/** Creates instance of 'command_line_parser', passes parameters to it,
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and returns the result of calling the 'run' method.
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*/
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template<class charT>
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basic_parsed_options<charT>
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parse_command_line(int argc, const charT* const argv[],
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const options_description&,
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int style = 0,
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function1<std::pair<std::string, std::string>,
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const std::string&> ext
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= ext_parser());
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/** Parse a config file.
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Read from given stream.
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*/
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template<class charT>
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#if ! BOOST_WORKAROUND(__ICL, BOOST_TESTED_AT(700))
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BOOST_PROGRAM_OPTIONS_DECL
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#endif
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basic_parsed_options<charT>
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parse_config_file(std::basic_istream<charT>&, const options_description&,
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bool allow_unregistered = false);
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/** Parse a config file.
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Read from file with the given name. The character type is
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passed to the file stream.
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*/
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template<class charT>
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#if ! BOOST_WORKAROUND(__ICL, BOOST_TESTED_AT(700))
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BOOST_PROGRAM_OPTIONS_DECL
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#endif
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basic_parsed_options<charT>
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parse_config_file(const char* filename, const options_description&,
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bool allow_unregistered = false);
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/** Controls if the 'collect_unregistered' function should
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include positional options, or not. */
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enum collect_unrecognized_mode
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{ include_positional, exclude_positional };
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/** Collects the original tokens for all named options with
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'unregistered' flag set. If 'mode' is 'include_positional'
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also collects all positional options.
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Returns the vector of origianl tokens for all collected
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options.
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*/
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template<class charT>
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std::vector< std::basic_string<charT> >
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collect_unrecognized(const std::vector< basic_option<charT> >& options,
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enum collect_unrecognized_mode mode);
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/** Parse environment.
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For each environment variable, the 'name_mapper' function is called to
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obtain the option name. If it returns empty string, the variable is
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ignored.
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This is done since naming of environment variables is typically
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different from the naming of command line options.
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*/
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BOOST_PROGRAM_OPTIONS_DECL parsed_options
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parse_environment(const options_description&,
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const function1<std::string, std::string>& name_mapper);
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/** Parse environment.
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Takes all environment variables which start with 'prefix'. The option
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name is obtained from variable name by removing the prefix and
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converting the remaining string into lower case.
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*/
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BOOST_PROGRAM_OPTIONS_DECL parsed_options
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parse_environment(const options_description&, const std::string& prefix);
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/** @overload
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This function exists to resolve ambiguity between the two above
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functions when second argument is of 'char*' type. There's implicit
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conversion to both function1 and string.
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*/
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BOOST_PROGRAM_OPTIONS_DECL parsed_options
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parse_environment(const options_description&, const char* prefix);
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/** Splits a given string to a collection of single strings which
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can be passed to command_line_parser. The second parameter is
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used to specify a collection of possible seperator chars used
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for splitting. The seperator is defaulted to space " ".
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Splitting is done in a unix style way, with respect to quotes '"'
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and escape characters '\'
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*/
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BOOST_PROGRAM_OPTIONS_DECL std::vector<std::string>
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split_unix(const std::string& cmdline, const std::string& seperator = " \t",
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const std::string& quote = "'\"", const std::string& escape = "\\");
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#ifndef BOOST_NO_STD_WSTRING
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/** @overload */
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BOOST_PROGRAM_OPTIONS_DECL std::vector<std::wstring>
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split_unix(const std::wstring& cmdline, const std::wstring& seperator = L" \t",
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const std::wstring& quote = L"'\"", const std::wstring& escape = L"\\");
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#endif
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#ifdef _WIN32
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/** Parses the char* string which is passed to WinMain function on
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windows. This function is provided for convenience, and because it's
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not clear how to portably access split command line string from
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runtime library and if it always exists.
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This function is available only on Windows.
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*/
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BOOST_PROGRAM_OPTIONS_DECL std::vector<std::string>
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split_winmain(const std::string& cmdline);
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#ifndef BOOST_NO_STD_WSTRING
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/** @overload */
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BOOST_PROGRAM_OPTIONS_DECL std::vector<std::wstring>
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split_winmain(const std::wstring& cmdline);
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#endif
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#endif
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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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#undef DECL
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#include "boost/program_options/detail/parsers.hpp"
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#endif
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