diff options
Diffstat (limited to 'libbutl/builtin-options.hxx')
| -rw-r--r-- | libbutl/builtin-options.hxx | 118 |
1 files changed, 104 insertions, 14 deletions
diff --git a/libbutl/builtin-options.hxx b/libbutl/builtin-options.hxx index b389298..70179dd 100644 --- a/libbutl/builtin-options.hxx +++ b/libbutl/builtin-options.hxx @@ -68,7 +68,7 @@ namespace butl { public: virtual - ~unknown_option () throw (); + ~unknown_option () noexcept; unknown_option (const std::string& option); @@ -79,7 +79,7 @@ namespace butl print (::std::ostream&) const; virtual const char* - what () const throw (); + what () const noexcept; private: std::string option_; @@ -89,7 +89,7 @@ namespace butl { public: virtual - ~unknown_argument () throw (); + ~unknown_argument () noexcept; unknown_argument (const std::string& argument); @@ -100,7 +100,7 @@ namespace butl print (::std::ostream&) const; virtual const char* - what () const throw (); + what () const noexcept; private: std::string argument_; @@ -110,7 +110,7 @@ namespace butl { public: virtual - ~missing_value () throw (); + ~missing_value () noexcept; missing_value (const std::string& option); @@ -121,7 +121,7 @@ namespace butl print (::std::ostream&) const; virtual const char* - what () const throw (); + what () const noexcept; private: std::string option_; @@ -131,7 +131,7 @@ namespace butl { public: virtual - ~invalid_value () throw (); + ~invalid_value () noexcept; invalid_value (const std::string& option, const std::string& value, @@ -150,7 +150,7 @@ namespace butl print (::std::ostream&) const; virtual const char* - what () const throw (); + what () const noexcept; private: std::string option_; @@ -165,7 +165,7 @@ namespace butl print (::std::ostream&) const; virtual const char* - what () const throw (); + what () const noexcept; }; // Command line argument scanner interface. @@ -174,6 +174,14 @@ namespace butl // for the two previous arguments up until a call to a third // peek() or next(). // + // The position() function returns a monotonically-increasing + // number which, if stored, can later be used to determine the + // relative position of the argument returned by the following + // call to next(). Note that if multiple scanners are used to + // extract arguments from multiple sources, then the end + // position of the previous scanner should be used as the + // start position of the next. + // class scanner { public: @@ -191,13 +199,24 @@ namespace butl virtual void skip () = 0; + + virtual std::size_t + position () = 0; }; class argv_scanner: public scanner { public: - argv_scanner (int& argc, char** argv, bool erase = false); - argv_scanner (int start, int& argc, char** argv, bool erase = false); + argv_scanner (int& argc, + char** argv, + bool erase = false, + std::size_t start_position = 0); + + argv_scanner (int start, + int& argc, + char** argv, + bool erase = false, + std::size_t start_position = 0); int end () const; @@ -214,7 +233,11 @@ namespace butl virtual void skip (); - private: + virtual std::size_t + position (); + + protected: + std::size_t start_position_; int i_; int& argc_; char** argv_; @@ -224,13 +247,15 @@ namespace butl class vector_scanner: public scanner { public: - vector_scanner (const std::vector<std::string>&, std::size_t start = 0); + vector_scanner (const std::vector<std::string>&, + std::size_t start = 0, + std::size_t start_position = 0); std::size_t end () const; void - reset (std::size_t start = 0); + reset (std::size_t start = 0, std::size_t start_position = 0); virtual bool more (); @@ -244,7 +269,11 @@ namespace butl virtual void skip (); + virtual std::size_t + position (); + private: + std::size_t start_position_; const std::vector<std::string>& v_; std::size_t i_; }; @@ -455,6 +484,67 @@ namespace butl bool utc_; }; + class find_options + { + public: + find_options (); + + // Return true if anything has been parsed. + // + bool + parse (int& argc, + char** argv, + bool erase = false, + ::butl::cli::unknown_mode option = ::butl::cli::unknown_mode::fail, + ::butl::cli::unknown_mode argument = ::butl::cli::unknown_mode::stop); + + bool + parse (int start, + int& argc, + char** argv, + bool erase = false, + ::butl::cli::unknown_mode option = ::butl::cli::unknown_mode::fail, + ::butl::cli::unknown_mode argument = ::butl::cli::unknown_mode::stop); + + bool + parse (int& argc, + char** argv, + int& end, + bool erase = false, + ::butl::cli::unknown_mode option = ::butl::cli::unknown_mode::fail, + ::butl::cli::unknown_mode argument = ::butl::cli::unknown_mode::stop); + + bool + parse (int start, + int& argc, + char** argv, + int& end, + bool erase = false, + ::butl::cli::unknown_mode option = ::butl::cli::unknown_mode::fail, + ::butl::cli::unknown_mode argument = ::butl::cli::unknown_mode::stop); + + bool + parse (::butl::cli::scanner&, + ::butl::cli::unknown_mode option = ::butl::cli::unknown_mode::fail, + ::butl::cli::unknown_mode argument = ::butl::cli::unknown_mode::stop); + + // Option accessors. + // + // Implementation details. + // + protected: + bool + _parse (const char*, ::butl::cli::scanner&); + + private: + bool + _parse (::butl::cli::scanner&, + ::butl::cli::unknown_mode option, + ::butl::cli::unknown_mode argument); + + public: + }; + class ln_options { public: |