Description Nathan Ridge 2010-12-27 01:33:36 EST

Here is the test code, consisting of three files:

define.hpp:

#ifdef MY_DEFINE
#define CALL_F() f(0)
#else
#define CALL_F() f()
#endif

define1.cpp:

#define MY_DEFINE
#include "define.hpp"
struct S { void foo(); };
S f(int);
void g()
{
    CALL_F().foo();
}

define2.cpp:

#include "define.hpp"
struct T { void bar(); };
T f();
void g()
{
    CALL_F().bar();  // ERROR HERE
}

These files compile just fine with gcc, but the CDT parser gives an error  define.hpp on the line CALL_F().bar(): "bar: method could not be resolved"

Hovering over CALL_F() in define2.cpp to see the macro expansion, it is "f(0)", suggesting that the parser thinks MY_DEFINE is defined, even though it is not in define2.cpp.

Notice that it is the call to bar(), and not the call to CALL_F() (which expands to f(0)) which is giving the error, suggesting that the parser figures that the f being called is the f in define1.cpp, which returns S, which does not have a bar() method (indeed, if I add a bar() method to S in define1.cpp, the error goes away!!).

This suggests that there are (at least) two underlying problems:

1. The CALL_F() in define2.cpp expands to f(0) and not f(), suggesting that the parser thinks MY_DEFINE is defined in define2.cpp when it is not.

2. Having expanded CALL_F() to f(0) in define2.cpp, the parser decides that the f being called is the one in define1.cpp. This is wrong, since the f in define1.cpp is not in scope in define2.cpp.