C++ TRACE and LOG macros.

logtrace.cpp

#include <iostream>
#include <sstream>

#include "test.h"

using std::string;

void debug_printer(string type, string fn, string func, int line, string msg) {
    std::cout
        << type << ": "
        << fn << "(" << line << "): "
        << func;
        if (msg.size()) {
            std::cout << "\n\t" << msg;
        }
        std::cout << std::endl;
}

void where_am_I(int x) {
    TRACE;
    if (x % 2) {
        LOG("x("<<x<<") is odd.");
    }
}

int main(int argc, char* argv[]) {
    TRACE;
    where_am_I(3);
    where_are_you();
    return 0;
}

logtrace.hpp

using std::string;

#define TRACE debug_printer("TRACE", __FILE__, __PRETTY_FUNCTION__, __LINE__ , string());
#define LOG(msg) {std::ostringstream _s; _s << msg; debug_printer("LOG", __FILE__, __PRETTY_FUNCTION__, __LINE__ , _s.str());}

void debug_printer(string type, string fn, string func, int line, string msg);

void where_are_you() {
    LOG("Here I am!");
}

OUTPUT

TRACE: /dev/shm/test.cpp(27): int main(int, char**)
TRACE: /dev/shm/test.cpp(20): void where_am_I(int)
LOG: /dev/shm/test.cpp(22): void where_am_I(int)
	x(3) is odd.
LOG: /dev/shm/test.h(10): void where_are_you()
	Here I am!