src/marnav/nmea/checks.hpp

   1 #ifndef MARNAV__NMEA__CHECKS__HPP
   2 #define MARNAV__NMEA__CHECKS__HPP
   3
   4 #include <marnav/nmea/constants.hpp>
   5 #include <marnav/nmea/string.hpp>
   6 #include <marnav/utils/optional.hpp>
   7 #include <algorithm>
   8 #include <stdexcept>
   9 #include <string>
  10
  11 namespace marnav
  12 {
  13 namespace nmea
  14 {
  15 /// @cond DEV
  16 namespace
  17 {
  18 template <typename T>
  19 static void throw_elaborated_invalid_argument(
  20         T value, std::initializer_list<T> options, const char * name = nullptr)
  21 {
  22         std::string text;
  23         text.reserve(64);
  24         text += "invalid argument, value '";
  25         text += to_string(value);
  26         text += "' not in options:{";
  27         for (auto const & opt : options) {
  28                 text += ' ';
  29                 text += to_string(opt);
  30         }
  31         text += " }";
  32         if (name) {
  33                 text += " for '";
  34                 text += name;
  35                 text += '\'';
  36         }
  37         throw std::invalid_argument{text};
  38 }
  39 }
  40 /// @endcond
  41
  42 /// Checks the value agains a list of possible values.
  43 ///
  44 /// @param[in] value Value to check.
  45 /// @param[in] options Possible values to check against.
  46 /// @param[in] name Optional name of the value to check. This name will be mentioned
  47 ///   in thrown exception, if the value is invalid.
  48 ///
  49 /// @exception std::invalid_argument The value is not listed in the options.
  50 template <class T>
  51 void check_value(T value, std::initializer_list<T> options, const char * name = nullptr)
  52 {
  53         using namespace std;
  54         if (find_if(begin(options), end(options), [value](T opt) { return value == opt; })
  55                 != end(options))
  56                 return;
  57
  58         throw_elaborated_invalid_argument(value, options, name);
  59 }
  60
  61 template <class T>
  62 void check_value(const utils::optional<T> & value, std::initializer_list<T> options,
  63         const char * name = nullptr)
  64 {
  65         if (value)
  66                 check_value(value.value(), options, name);
  67 }
  68
  69 void check_status(status value, const char * name = nullptr);
  70
  71 void check_status(const utils::optional<status> & value, const char * name = nullptr);
  72 }
  73 }
  74
  75 #endif