diag0297.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 23 行

struct A { int a; };
struct B { int b; };

int f( struct A * a, struct B * b )
{
        return( a == b );	// no warning with -wx, no error
}

int f( struct A * a, int * b )
{
        return( a == b );	// error
}

struct X : A {
};
struct Y : A {
};

int f( X * a, Y * b )
{
        return( a == b );	// error
}