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/* Self tests for offset types for GDB, the GNU debugger.
Copyright (C) 2017-2021 Free Software Foundation, Inc.
This file is part of GDB.
This program 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 of the License, or
(at your option) any later version.
This program 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 program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbsupport/selftest.h"
#include "gdbsupport/offset-type.h"
#include "gdbsupport/underlying.h"
#include "gdbsupport/valid-expr.h"
namespace selftests {
namespace offset_type {
DEFINE_OFFSET_TYPE (off_A, unsigned int);
DEFINE_OFFSET_TYPE (off_B, unsigned int);
/* First, compile-time tests that:
- make sure that incorrect operations with mismatching types are
caught at compile time.
- make sure that the same operations but involving the right types
do compile and that they return the correct type.
*/
#define CHECK_VALID(VALID, EXPR_TYPE, EXPR) \
CHECK_VALID_EXPR_2 (off_A, off_B, VALID, EXPR_TYPE, EXPR)
off_A lval_a {};
off_B lval_b {};
using undrl = std::underlying_type<off_A>::type;
/* Offset +/- underlying. */
CHECK_VALID (true, off_A, off_A {} + undrl {});
CHECK_VALID (true, off_A, off_A {} - undrl {});
CHECK_VALID (true, off_A, undrl {} + off_A {});
CHECK_VALID (true, off_A, undrl {} - off_A {});
/* Add offset types. Both same and different. */
CHECK_VALID (false, void, off_A {} + off_A {});
CHECK_VALID (false, void, off_A {} + off_B {});
/* Subtract offset types. Both same and different. */
CHECK_VALID (false, void, off_B {} - off_A {});
CHECK_VALID (true, undrl, off_A {} - off_A {});
/* Add/assign offset types. Both same and different. */
CHECK_VALID (false, void, lval_a += off_A {});
CHECK_VALID (false, void, lval_a += off_B {});
CHECK_VALID (false, void, lval_a -= off_A {});
CHECK_VALID (false, void, lval_a -= off_B {});
/* operator OP+= (offset, underlying), lvalue ref on the lhs. */
CHECK_VALID (true, off_A&, lval_a += undrl {});
CHECK_VALID (true, off_A&, lval_a -= undrl {});
/* operator OP+= (offset, underlying), rvalue ref on the lhs. */
CHECK_VALID (false, void, off_A {} += undrl {});
CHECK_VALID (false, void, off_A {} -= undrl {});
/* Rel ops, with same type. */
CHECK_VALID (true, bool, off_A {} < off_A {});
CHECK_VALID (true, bool, off_A {} > off_A {});
CHECK_VALID (true, bool, off_A {} <= off_A {});
CHECK_VALID (true, bool, off_A {} >= off_A {});
/* Rel ops, with unrelated offset types. */
CHECK_VALID (false, void, off_A {} < off_B {});
CHECK_VALID (false, void, off_A {} > off_B {});
CHECK_VALID (false, void, off_A {} <= off_B {});
CHECK_VALID (false, void, off_A {} >= off_B {});
/* Rel ops, with unrelated types. */
CHECK_VALID (false, void, off_A {} < undrl {});
CHECK_VALID (false, void, off_A {} > undrl {});
CHECK_VALID (false, void, off_A {} <= undrl {});
CHECK_VALID (false, void, off_A {} >= undrl {});
static void
run_tests ()
{
/* Test op+ and op-. */
{
constexpr off_A a {};
static_assert (to_underlying (a) == 0, "");
{
constexpr off_A res1 = a + 2;
static_assert (to_underlying (res1) == 2, "");
constexpr off_A res2 = res1 - 1;
static_assert (to_underlying (res2) == 1, "");
}
{
constexpr off_A res1 = 2 + a;
static_assert (to_underlying (res1) == 2, "");
constexpr off_A res2 = 3 - res1;
static_assert (to_underlying (res2) == 1, "");
}
}
/* Test op+= and op-=. */
{
off_A o {};
o += 10;
SELF_CHECK (to_underlying (o) == 10);
o -= 5;
SELF_CHECK (to_underlying (o) == 5);
}
/* Test op-. */
{
constexpr off_A o1 = (off_A) 10;
constexpr off_A o2 = (off_A) 20;
constexpr unsigned int delta = o2 - o1;
static_assert (delta == 10, "");
}
/* Test <, <=, >, >=. */
{
constexpr off_A o1 = (off_A) 10;
constexpr off_A o2 = (off_A) 20;
static_assert (o1 < o2, "");
static_assert (!(o2 < o1), "");
static_assert (o2 > o1, "");
static_assert (!(o1 > o2), "");
static_assert (o1 <= o2, "");
static_assert (!(o2 <= o1), "");
static_assert (o2 >= o1, "");
static_assert (!(o1 >= o2), "");
static_assert (o1 <= o1, "");
static_assert (o1 >= o1, "");
}
}
} /* namespace offset_type */
} /* namespace selftests */
void _initialize_offset_type_selftests ();
void
_initialize_offset_type_selftests ()
{
selftests::register_test ("offset_type", selftests::offset_type::run_tests);
}
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