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	std::size_t position = 0;
	std::string length {""}, header_name {""}, header_value {""};
	bool in_length = true, in_header_name = false, in_header_value = false, in_req_body = false;
 
	for(auto it = raw_scgi_netstring.begin(); it != raw_scgi_netstring.end(); ++it)
	{
		if(*it == ',')
		{
			in_req_body = true;
			in_length = false;
			in_header_name = false;
			in_header_value = false;
 
			// skip to next character 
			it++;
		}
		else if(in_length)
		{
			if(*it == ':')
			{
				in_length = false;
				in_header_name = true;
 
				// skip to next character
				it++;
			}
			else
			{
				length.push_back(raw_scgi_netstring.at(*it));
			}
		}
		else if(in_header_name)
		{
			if(*it == '\0')
			{
				in_header_name = false;
				in_header_value = true;
 
				// skip to next character
				it++;
			}
			else
			{
 
			}
		}
		else if(in_header_value)
		{
			if(*it == '\0')
			{
				in_header_value = false;
				in_header_name = true;
 
				// skip to next character
				it++;
			}
			else
			{
 
			}
		}
		else if(in_req_body)
		{
 
		}
 
		position++;
	}
	this->length = std::stoull(length);
}

prog.cpp:1:2: error: ‘size_t’ in namespace ‘std’ does not name a type
  std::size_t position = 0;
  ^
prog.cpp:2:2: error: ‘string’ in namespace ‘std’ does not name a type
  std::string length {""}, header_name {""}, header_value {""};
  ^
prog.cpp:2:25: error: expected unqualified-id before ‘,’ token
  std::string length {""}, header_name {""}, header_value {""};
                         ^
prog.cpp:2:39: error: expected constructor, destructor, or type conversion before ‘{’ token
  std::string length {""}, header_name {""}, header_value {""};
                                       ^
prog.cpp:2:43: error: expected unqualified-id before ‘,’ token
  std::string length {""}, header_name {""}, header_value {""};
                                           ^
prog.cpp:2:58: error: expected constructor, destructor, or type conversion before ‘{’ token
  std::string length {""}, header_name {""}, header_value {""};
                                                          ^
prog.cpp:5:2: error: expected unqualified-id before ‘for’
  for(auto it = raw_scgi_netstring.begin(); it != raw_scgi_netstring.end(); ++it)
  ^
prog.cpp:5:44: error: ‘it’ does not name a type
  for(auto it = raw_scgi_netstring.begin(); it != raw_scgi_netstring.end(); ++it)
                                            ^
prog.cpp:5:76: error: expected unqualified-id before ‘++’ token
  for(auto it = raw_scgi_netstring.begin(); it != raw_scgi_netstring.end(); ++it)
                                                                            ^

Standard output is empty