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// Test for Container using non-standard pointer types.
// Copyright (C) 2008-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <algorithm>
#include <testsuite_hooks.h>
#include <ext/cast.h>
#include <ext/pointer.h>
using __gnu_cxx::_Pointer_adapter;
using __gnu_cxx::_Relative_pointer_impl;
using __gnu_cxx::__static_pointer_cast;
using __gnu_cxx::__const_pointer_cast;
void
test01() {
typedef _Pointer_adapter<_Relative_pointer_impl<int> > pointer;
typedef _Pointer_adapter<_Relative_pointer_impl<const int> > const_pointer;
int A[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
// basic pointer assignment/access tests.
pointer x = &A[0];
VERIFY(*x == 0);
VERIFY(std::equal(x, x+10, A));
pointer y(&A[9]);
VERIFY(*y == 9);
// assignability
pointer z(x);
VERIFY(z==x);
VERIFY(*z == 0);
z = y;
VERIFY(z==y);
VERIFY(z!=x);
VERIFY(z>x);
VERIFY(*z == 9);
// pointer arithmetic
VERIFY(*++x == 1);
VERIFY(*--x == 0);
VERIFY(*(x++) == 0);
VERIFY(*(x--) == 1);
VERIFY(*(x+2) == 2);
VERIFY(*(2+x) == 2);
VERIFY(*(y-2) == 7);
VERIFY(y - x == 9);
VERIFY(&*y - x == 9);
VERIFY(y - &*x == 9);
size_t s(y - x);
VERIFY(s == 9);
}
struct A {
mutable int i;
};
struct B : public A{
mutable int j;
};
typedef _Pointer_adapter<_Relative_pointer_impl<B> > B_pointer;
typedef _Pointer_adapter<_Relative_pointer_impl<A> > A_pointer;
typedef _Pointer_adapter<_Relative_pointer_impl<const A> > const_A_pointer;
typedef _Pointer_adapter<_Relative_pointer_impl<const B> > const_B_pointer;
// Test implicit conversion from B* to A*
void inc(_Pointer_adapter<_Relative_pointer_impl<A> > a) {
a->i++;
}
// Test implicit conversion from B* to const B*
void inc2(_Pointer_adapter<_Relative_pointer_impl<const B> > b) {
b->i++;
b->j++;
}
// Test implicit conversion from B* to const A*
void inc3(_Pointer_adapter<_Relative_pointer_impl<const A> > a) {
a->i++;
}
void test02() {
B b;
b.i = 2;
b.j = 2;
B_pointer Bptr(&b);
VERIFY(Bptr->i == 2);
Bptr->i++;
VERIFY(b.i == 3);
const_B_pointer cBptr(&b);
b.i++;
VERIFY(cBptr->i == 4);
A_pointer Aptr(&b);
b.i++;
VERIFY(Aptr->i == 5);
Aptr->i++;
VERIFY(b.i == 6);
const_A_pointer cAptr(&b);
b.i++;
VERIFY(cAptr->i == 7);
const_B_pointer cBptr2(Bptr);
b.i++;
VERIFY(cBptr2->i == 8);
A_pointer Aptr2(Bptr);
b.i++;
VERIFY(Aptr2->i == 9);
Aptr2->i++;
VERIFY(b.i == 10);
const_A_pointer cAptr2(Bptr);
b.i++;
VERIFY(cAptr2->i == 11);
// Implicit casting during invocation
inc(Bptr);
VERIFY(Bptr->i == 12);
inc2(Bptr);
VERIFY(Bptr->i == 13);
VERIFY(Bptr->j == 3);
inc3(Bptr);
VERIFY(Bptr->i == 14);
}
void test03() {
B b;
B* bPtr = &b;
A* aPtr __attribute__((unused)) = __static_pointer_cast<A*>(bPtr);
const A *caPtr __attribute__((unused)) = __static_pointer_cast<const A*>(bPtr);
const B *cbPtr __attribute__((unused)) = __static_pointer_cast<const B*>(bPtr);
B_pointer Bptr2 = &b;
const A* caPtr2 __attribute__((unused)) = __static_pointer_cast<const A*>(Bptr2);
A * aPtr2 __attribute__((unused)) = __static_pointer_cast<A*>(Bptr2);
const B* cbPtr2 __attribute__((unused)) = __const_pointer_cast<const B*>(Bptr2);
const_A_pointer caPtr3 __attribute__((unused)) = __static_pointer_cast<const A*>(Bptr2);
A_pointer aPtr3 __attribute__((unused)) = __static_pointer_cast<A*>(Bptr2);
const_B_pointer cbPtr3 __attribute__((unused)) = __const_pointer_cast<const B*>(Bptr2);
}
// Confirm the usability of the __static_pointer_cast<> template function
// to transform between _Pointer_adapter and standard versions.
void test04() {
B b;
B_pointer bPtr = &b;
A_pointer aPtr = __static_pointer_cast<A_pointer>(bPtr);
VERIFY(aPtr == bPtr);
B_pointer bPtr2 = __static_pointer_cast<B_pointer>(aPtr);
VERIFY(bPtr2 == aPtr);
A* aPtr3 = __static_pointer_cast<A*>(bPtr);
VERIFY(aPtr3 == bPtr);
B* bPtr3 = __static_pointer_cast<B*>(aPtr);
VERIFY(bPtr3 == aPtr);
}
// Check that long long values can be used for pointer arithmetic.
void test05()
{
A a[2] = { 1, 2 };
A_pointer p = a;
A_pointer q = p + 0ull;
VERIFY( p == q );
q += 0ll;
VERIFY( p == q );
q += 1ll;
VERIFY( q->i == p[1ll].i );
}
int main()
{
test01();
test02();
test03();
test04();
test05();
return 0;
}
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