Viewing file:  lambda-this2.C (2.16 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
// P0018R3 - C++17 lambda capture of *this
// { dg-do run { target c++11 } }
// { dg-options "" }
extern "C" void abort ();
struct A {
int a, z;
A () : a (4), z (0) {}
A (const A &x) : a (x.a), z (1) {}
void foo () {
if (z != 0) abort ();
auto b = [this] { return &a; };
auto c = [*this] { return &a; }; // { dg-warning "'*this' capture only available with" "" { target c++14_down } }
auto d = [=] { return &a; }; // { dg-warning "implicit capture" "" { target c++2a } }
auto e = [&] { return &a; };
if (b () != &a) abort ();
if (*b () != 4) abort ();
auto f = c ();
if (c () == &a) abort ();
if (c () != f) abort ();
if (*c () != 4) abort ();
if (d () != &a) abort ();
if (e () != &a) abort ();
auto g = [this] { return a + z; };
auto h = [*this] { return a + z; }; // { dg-warning "'*this' capture only available with" "" { target c++14_down } }
auto i = [=] { return a + z; }; // { dg-warning "implicit capture" "" { target c++2a } }
auto j = [&] { return a + z; };
if (g () != 4 || h () != 5 || i () != 4 || j () != 4) abort ();
}
};
template <int N>
struct B {
int a, z;
B () : a (N), z (0) {}
B (const B &x) : a (x.a), z (1) {}
void foo () {
if (z != 0) abort ();
auto b = [this] { return &a; };
auto c = [*this] { return &a; }; // { dg-warning "'*this' capture only available with" "" { target c++14_down } }
auto d = [=] { return &a; }; // { dg-warning "implicit capture" "" { target c++2a } }
auto e = [&] { return &a; };
if (b () != &a) abort ();
if (*b () != 9) abort ();
auto f = c ();
if (c () == &a) abort ();
if (c () != f) abort ();
if (*c () != 9) abort ();
if (d () != &a) abort ();
if (e () != &a) abort ();
auto g = [this] { return a + z; };
auto h = [*this] { return a + z; }; // { dg-warning "'*this' capture only available with" "" { target c++14_down } }
auto i = [=] { return a + z; }; // { dg-warning "implicit capture" "" { target c++2a } }
auto j = [&] { return a + z; };
if (g () != 9 || h () != 10 || i () != 9 || j () != 9) abort ();
}
};
int
main ()
{
A a;
a.foo ();
B<9> b;
b.foo ();
return 0;
}
|
