c3c/test/test_suite/compile_time_introspection/defined_err.c3

fn void test1()
{
    bool x = $defined(1); // #error: Expected an identifier here
}

struct Foo
{
    int x;
}

fn void test2()
{
    $assert($defined(int[1]));
    bool x = $defined(int[y]); // #error: 'y' could not be found, did you spell it right?
}

fn void test3()
{
    $assert($defined(Foo[1]));
    $assert($defined(Foo*));
    $assert($defined(Foo[]));
    $assert($defined(Foo[*]));
    bool x = $defined(Foo[y]); // #error: 'y' could not be found, did you spell it right?
}