Syntax highlighting doesn't work when the code is inside a #if <expr> block.

QtCreator enter into a syntax highlight limbo mode when the code is inside a #if <expr> preprocessor block.

e.g.:

#include <cstdio>

#define ENABLE_HIGHLIGHT_LIMBO(EXPR) (EXPR)
#if ENABLE_HIGHLIGHT_LIMBO(1)

using namespace std;

class Foo {
public:
    virtual void foo(int a) {
        printf("%s : %d\n", __func__, a);
    }
};

int main() {
    Foo f;
    f.foo(__LINE__);
}
#endif

If you comment the #if line will will see the "std" and "Foo" purple and the foo() on foo(_LINE_) italic for being a virtual call, if you leave it as is all this will be on pure black, with no syntax highlight helper :-/

This issue affect all hackers working on WebKit with QtCreator.