Enum in constructor Qt C++ - c++

Question

I'm create my own LOGGER, where I use an additional class for overload macro.
There is #define qlcd MacroCall(QLC::Debug), so i can use logger like this: qlcd << message;
It's ok, but when i try use qlcd("log name") i got an error. Look minimal code (no macro for simplify):
#include <QVariant>
#include <QDebug>
class QLC
{
public:
// Error types
enum LevelType{
Debug=0, // Debug
Error=1, // Error
WTF = 2 // WTF???
} level;
QString logger;
// Constructors
QLC(QLC::LevelType l)
:level(l), logger(":")
{}
QLC(QLC::LevelType l, QString log)
:level(l), logger(log)
{}
// OPERATOR <<
QLC& operator<<(const QVariant var){
qDebug() << "(" + QString::number(level) + ")" << logger << var;
}
};
class MacroCall
{
QLC::LevelType level;
public:
MacroCall()
:level(QLC::Debug){}
MacroCall(int i)
:level(QLC::WTF){}
MacroCall(QLC::LevelType l)
:level(l){}
QLC operator()(){
return QLC(level);
}
QLC operator()(QString log){
return QLC(level, log);
}
};
int main(int argc, char*argv[])
{
MacroCall()("WorkLog") << "No level, yes logname";
MacroCall(QLC::Error)() << "No logname, yes level";
MacroCall a(QLC::Error);
a("WorkLog") << "Logname and level at different lines";
// GET READY!
// INT as level and logname:
MacroCall(2)("WorkLog") << "WTF?? It works!";
//MacroCall(QLC::WTF)("NotWorkLog") << "It's not work!!!!!!";
// NOT WORK: error: invalid use of qualified-name 'QLC::WTF'
// Qt 4.8.3
return 0;
}

Answer 1

The code
MacroCall(QLC::WTF)("NotWorkLog")
is interpreted as declaration of a variable:
MacroCall QLC::WTF("NotWorkLog")
Example:
class A
{
public:
enum E {
x=1
};
public:
A(E) {}
void operator()(int) const { }
};
class B {};
void f()
{
(A(A::x))(1); // Ok
A{A::x}(1); // Ok
A(a)(A::x); // Ok
A::E a; // ‘a’ has a previous declaration as ‘A a’
A(A::x)(1); // invalid use of qualified-name ‘A::x’
B(b)(A::x); // no matching function for call to ‘B::B(A::E)’
}

Answer 2

The code you gave compiles (except that the method QLC& operator<<(const QVariant var) has to return something), eventhough I'm not sure of how it's supposed to be used.
My guess is that your 2 classes are defined in different headers and an include is missing. Does Macrocall header include QLC header ?