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// Copyright (C) 2020-2023 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC 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.
// GCC 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 GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include "rust-system.h"
#include "rust-optional.h"
#include "selftest.h"
#if CHECKING_P
static void
rust_optional_create ()
{
auto opt = Rust::Optional<int>::some (15);
ASSERT_TRUE (opt.is_some ());
ASSERT_EQ (opt.get (), 15);
Rust::Optional<int> const_opt = Rust::Optional<int>::some (15);
const int &value = const_opt.get ();
ASSERT_EQ (value, 15);
}
static void
rust_optional_operators ()
{
auto opt = Rust::Optional<int>::some (15);
// as bool
ASSERT_TRUE (opt);
// deref
ASSERT_EQ (*opt, 15);
class Methodable
{
public:
int method () { return 15; }
};
auto m_opt = Rust::Optional<Methodable>::some (Methodable ());
ASSERT_EQ (m_opt->method (), 15);
}
static void
rust_optional_take ()
{
auto opt = Rust::Optional<int>::some (15);
auto value = opt.take ();
ASSERT_EQ (value, 15);
ASSERT_TRUE (opt.is_none ());
}
static void
rust_optional_map ()
{
auto opt = Rust::Optional<int>::some (15);
auto twice = opt.map<int> ([] (int value) { return value * 2; });
ASSERT_FALSE (opt);
ASSERT_TRUE (twice);
ASSERT_EQ (*twice, 30);
}
static void
rust_optional_reference ()
{
auto value = std::vector<std::string> ();
value.emplace_back ("rust");
value.emplace_back ("+");
value.emplace_back ("gcc");
value.emplace_back ("=");
value.emplace_back ("<3");
auto opt = Rust::Optional<std::vector<std::string> &>::some (value);
ASSERT_EQ (opt->at (0), "rust");
ASSERT_EQ (opt->at (2), "gcc");
}
#endif /* #if CHECKING_P */
void
rust_optional_test ()
{
#if CHECKING_P
rust_optional_create ();
rust_optional_operators ();
rust_optional_take ();
rust_optional_map ();
rust_optional_reference ();
#endif /* #if CHECKING_P */
}
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