c++ Calling class method inside same method - c++

Question

I´m writing the clsLog class:
// This is the main DLL file.
#include "stdafx.h"
#include <time.h>
#include <fstream>
#include <iostream>
#include <string>
#include "clsLog.h"
std::string m_strCurLogUser;
int m_iCurLogAction;
int m_iCurLogLevel;
std::ofstream m_oCurLogFile;
//
// LogInit
// Initilize the log parameters of the system.
// The FileName will be the file name that the system will log the messages (LOG.TXT is the default if no names are given).
// The DatabaseName and TableName specifies the database and table name to be used for log. The default is "LOG_DATABASE" and "LOG_TABLE"
// will be done.
// The Action shall be an OR with all the options. Att: If an option is giver (ex: Database) and an invalid name is given, then an error will occur.
//
// The default log level is zero (0). So every log with a level upper than that will be logged. A change to the level must be done
// using the SetLogLevel method.
//
// return = 0: Success
// 1: Failure
//
int LogInit (std::string FileName, // Initialize the log file/connection.
std::string DatabaseName, // Database name to connect to.
std::string TableName, // Table name to connect to.
std::string UserName, // User name to log into
int Action) // Action to be done.
{
//
// If the file is already open, someone is calling that function before closing the previous one. Error.
//
if (m_oCurLogFile.is_open ())
{
std::string msg;
msg = "LogInit called for " + FileName + " witout closing previous session. Error";
this->clsLog::Log (msg);
}
// Do some stuff
return 0;
}
//
// Log
// Logs the Message according to its Level.
//
// return = 0: Success
// 1: Failure
//
int Log (std::string Message, int Level) // Register a log according to the log state.
{
time_t now;
struct tm ptm;
char buffer [32];
//
// If the sent message level is below the current level, abort.
//
if (Level < m_iCurLogLevel)
return 1;
// Get the current date and time and convert it to the time structure (ptm)
now = time (NULL);
localtime_s (&ptm, &now);
//
// Format the time structure: DD/MM/AAAA HH:MM:SS)
strftime (buffer, 32, "%D/%M/%Y %H:%M:%S", &ptm);
// Check if needs to be logged on stdio
//
if ((m_iCurLogLevel & LOGACTION_STDOUT) == LOGACTION_STDOUT)
{
cout << buffer + " " + Message;
}
return 0;
}
I´m not being able to compile. I´m getting the following error at
this->clsLog::Log (msg);
C2227 error on left of '->Log' must point to a class/struct/union/generic type. Using VS2010, Win32 application.
Help appreciated.
Rds

Answer 1

I don't see any evidence that your functions are inside a class definition; therefore, as the error message says, there's no "this" pointer available. "This" is only available in the instance members of a class.

Answer 2

The this pointer is only valid inside a method that is a (non-static) member of a class or struct. There is no this for a plain function such as LogInit.