Line data    Source code

       1             : /** @file native_unit.hpp
       2             :  *
       3             :  *  Author: Roland Conybeare
       4             :  **/
       5             : 
       6             : #pragma once
       7             : 
       8             : #include "dimension.hpp"
       9             : #include "xo/flatstring/flatstring.hpp"
      10             : 
      11             : namespace xo {
      12             :     namespace qty {
      13             :         using native_unit2_abbrev_type = flatstring<8>;
      14             : 
      15             :         /** @class native_unit
      16             :          *
      17             :          *  @brief Represent a native (built-in) unit.
      18             :          *
      19             :          *  A basis_unit is expressed as a multiple of a native_unit
      20             :          *
      21             :          **/
      22             :         struct native_unit {
      23             :         public:
      24             :             constexpr native_unit(dim native_dim,
      25             :                                   const native_unit2_abbrev_type & abbrev_str)
      26             :                 : native_dim_{native_dim},
      27             :                   abbrev_str_{abbrev_str}
      28             :                 {}
      29             : 
      30             :             constexpr dim native_dim() const { return native_dim_; }
      31           0 :             constexpr const native_unit2_abbrev_type & abbrev_str() const { return abbrev_str_; }
      32             : 
      33             :         private:
      34             :             dim native_dim_;
      35             :             native_unit2_abbrev_type abbrev_str_;
      36             :         };
      37             : 
      38             :         static constexpr native_unit native_unit2_v[n_dim] = {
      39             :             native_unit(dim::mass,     native_unit2_abbrev_type::from_chars("g")),
      40             :             native_unit(dim::distance, native_unit2_abbrev_type::from_chars("m")),
      41             :             native_unit(dim::time,     native_unit2_abbrev_type::from_chars("s")),
      42             :             native_unit(dim::currency, native_unit2_abbrev_type::from_chars("ccy")),
      43             :             native_unit(dim::price,    native_unit2_abbrev_type::from_chars("px")),
      44             :         };
      45             : 
      46             :     } /*namespace qty*/
      47             : } /*namespace xo*/
      48             : 
      49             : /** end native_unit.hpp **/