message: Generate header
diff: @@ -2004,14 +2004,7 @@ class wide_string_input_adapter : public input_adapter_protocol
  // check if buffer needs to be filled
  if (utf8_bytes_index == utf8_bytes_filled)
  {
  - if (sizeof(typename WideStringType::value_type) == 2)
  - {
  - fill_buffer_utf16();
  - }
  - else
  - {
  - fill_buffer_utf32();
  - }
  + fill_buffer(sizeof(typename WideStringType::value_type));
  assert(utf8_bytes_filled > 0);
  assert(utf8_bytes_index == 0);
  @@ -2024,6 +2017,18 @@ class wide_string_input_adapter : public input_adapter_protocol
  }
  private:
  + void fill_buffer(size_t size)
  + {
  + if (2 == size)
  + {
  + fill_buffer_utf16();
  + }
  + else
  + {
  + fill_buffer_utf32();
  + }
  + }
  +
  void fill_buffer_utf16()
  {
  utf8_bytes_index = 0;
  