false positive error with "not" macro and a constant value

[Cristian Del Fabbro]

Cppcheck 2.2 reports an error in this (working) code:

#include <iostream>
int main() {
    bool a = 0;
    bool b = not a;
    bool c = not 0; // <--- here

    // output is "0 1 1"
    std::cout << a << " " << b << " " << c << std::endl;
    return 0;
}

Error:

test.cpp:5:11: error: There is an unknown macro here somewhere. Configuration is required. If not is a macro then please configure it. [unknownMacro]
 bool c = not 0;
          ^

Cppcheck reports an error with every constant, not only with "0".

Best,
Cristian

[Daniel Marjamäki]

Thanks! I have created https://trac.cppcheck.net/ticket/10013