.. _program_listing_file_uconfig_format_Env.h:

Program Listing for File Env.h
==============================

|exhale_lsh| :ref:`Return to documentation for file <file_uconfig_format_Env.h>` (``uconfig/format/Env.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #pragma once
   
   #include "Format.h"
   
   #include <map>
   
   namespace uconfig {
   
   class EnvFormat: public Format
   {
   public:
       static inline const std::string name = "[ENV]";
       using source_type = void;
       using dest_type = std::map<std::string, std::string>;
   
       template <typename T>
       std::optional<T> Parse(const source_type* /*unused*/, const std::string& path) const;
   
       template <typename T>
       void Emit(dest_type* dest, const std::string& path, const T& value) const;
   
       inline virtual std::string VectorElementPath(const std::string& vector_path, std::size_t index) const noexcept override;
   
   private:
       template <typename T>
       static std::optional<T> FromString(const std::string& str);
   
       template <typename T>
       static std::string ToString(const T& value);
   };
   
   } // namespace uconfig
   
   #include "impl/Env.ipp"