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// Copyright 2018-2024 Emil Dotchevski and Reverge Studios, Inc.
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifdef BOOST_LEAF_TEST_SINGLE_HEADER
# include "leaf.hpp"
#else
# include <boost/leaf/result.hpp>
# include <boost/leaf/handle_errors.hpp>
#endif
#include "lightweight_test.hpp"
namespace leaf = boost::leaf;
struct val
{
int id;
friend bool operator==( val const & a, val const & b )
{
return a.id == b.id;
}
friend std::ostream & operator<<( std::ostream & os, val const & v )
{
return os << v.id;
}
};
struct base
{
};
struct derived: base
{
};
template <class T, class R, class RetType>
void test_case_lvref()
{
val x = { 42 };
R r(x);
static_assert(std::is_same<RetType &, decltype(r.value())>::value,
"Bad return type for .value()" );
static_assert(std::is_same<RetType &, decltype(*r)>::value,
"Bad return type for operator*()" );
static_assert(std::is_same<typename std::remove_reference<RetType>::type *, decltype(r.operator->())>::value,
"Bad return type for operator->()" );
BOOST_TEST(r);
BOOST_TEST_EQ(&r->id, &r.value().id);
T a = r.value();
BOOST_TEST_EQ(a, x);
T b = *r;
BOOST_TEST_EQ(b, x);
}
void test_lvref_access()
{
test_case_lvref<val, leaf::result<val>, val &>();
test_case_lvref<val &, leaf::result<val>, val &>();
test_case_lvref<val const &, leaf::result<val>, val &>();
test_case_lvref<val, leaf::result<val &>, val &>();
test_case_lvref<val &, leaf::result<val &>, val &>();
test_case_lvref<val const &, leaf::result<val &>, val &>();
test_case_lvref<val, leaf::result<val const &>, val const &>();
test_case_lvref<val const &, leaf::result<val const &>, val const &>();
test_case_lvref<val, leaf::result<val> const, val const &>();
test_case_lvref<val const &, leaf::result<val> const, val const &>();
test_case_lvref<val, leaf::result<val &> const, val &>();
test_case_lvref<val &, leaf::result<val &> const, val &>();
test_case_lvref<val const &, leaf::result<val &> const, val &>();
test_case_lvref<val, leaf::result<val const &> const, val const &>();
test_case_lvref<val const &, leaf::result<val const &> const, val const &>();
}
#ifndef BOOST_LEAF_NO_CXX11_REF_QUALIFIERS
template <class T, class R, class RetType>
void test_case_rvref()
{
val x = { 42 };
R r1(x);
static_assert(std::is_same<RetType, decltype(std::move(r1).value())>::value,
"Bad return type for .value()" );
static_assert(std::is_same<RetType, decltype(*std::move(r1))>::value,
"Bad return type for operator*()" );
static_assert(std::is_same<typename std::remove_reference<RetType>::type *, decltype(std::move(r1).operator->())>::value,
"Bad return type for operator->()" );
BOOST_TEST(r1);
BOOST_TEST_EQ(&r1->id, &r1.value().id);
T a = std::move(r1).value();
BOOST_TEST_EQ(a, x);
R r2(x);
T b = *std::move(r2);
BOOST_TEST_EQ(b, x);
}
void test_rvref_access()
{
test_case_rvref<val, leaf::result<val>, val &&>();
test_case_rvref<val &&, leaf::result<val>, val &&>();
test_case_rvref<val const &, leaf::result<val>, val &&>();
test_case_rvref<val, leaf::result<val &>, val &>();
test_case_rvref<val &, leaf::result<val &>, val &>();
test_case_rvref<val const &, leaf::result<val &>, val &>();
test_case_rvref<val, leaf::result<val const &>, val const &>();
test_case_rvref<val const &, leaf::result<val const &>, val const &>();
test_case_rvref<val, leaf::result<val> const, val const &&>();
test_case_rvref<val const &, leaf::result<val> const, val const &&>();
test_case_rvref<val, leaf::result<val &> const, val &>();
test_case_rvref<val &, leaf::result<val &> const, val &>();
test_case_rvref<val const &, leaf::result<val &> const, val &>();
test_case_rvref<val, leaf::result<val const &> const, val const &>();
test_case_rvref<val const &, leaf::result<val const &> const, val const &>();
}
#endif
int main()
{
{
leaf::result<val const> r1, r2;
leaf::result<val const> & ref = r1;
leaf::result<val const> const & cref = r1;
leaf::result<val const> && rvref = std::move(r1);
leaf::result<val const> const && rvcref = std::move(r2);
static_assert(std::is_same<decltype(ref.value()), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(cref.value()), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(rvref.value())), val const &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(rvcref.value())), val const &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(*ref), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(*cref), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(*rvref)), val const &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(*rvcref)), val const &&>::value, "result type deduction bug");
auto & ref_id = ref->id; static_assert(std::is_same<decltype(ref_id), int const &>::value, "result type deduction bug");
auto & cref_id = cref->id; static_assert(std::is_same<decltype(cref_id), int const &>::value, "result type deduction bug");
auto & rvref_id = rvref->id; static_assert(std::is_same<decltype(rvref_id), int const &>::value, "result type deduction bug");
auto & rvcref_id = rvcref->id; static_assert(std::is_same<decltype(rvcref_id), int const &>::value, "result type deduction bug");
}
{
leaf::result<val> r1, r2;
leaf::result<val> & ref = r1;
leaf::result<val> const & cref = r1;
leaf::result<val> && rvref = std::move(r1);
leaf::result<val> const && rvcref = std::move(r2);
static_assert(std::is_same<decltype(ref.value()), val &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(cref.value()), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(rvref.value())), val &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(rvcref.value())), val const &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(*ref), val &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(*cref), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(*rvref)), val &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(*rvcref)), val const &&>::value, "result type deduction bug");
auto & ref_id = ref->id; static_assert(std::is_same<decltype(ref_id), int &>::value, "result type deduction bug");
auto & cref_id = cref->id; static_assert(std::is_same<decltype(cref_id), int const &>::value, "result type deduction bug");
auto & rvref_id = rvref->id; static_assert(std::is_same<decltype(rvref_id), int &>::value, "result type deduction bug");
auto & rvcref_id = rvcref->id; static_assert(std::is_same<decltype(rvcref_id), int const &>::value, "result type deduction bug");
}
{
val v;
leaf::result<val const &> r1(v), r2(v);
leaf::result<val const &> & ref = r1;
leaf::result<val const &> const & cref = r1;
leaf::result<val const &> && rvref = std::move(r1);
leaf::result<val const &> const && rvcref = std::move(r2);
static_assert(std::is_same<decltype(ref.value()), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(cref.value()), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(rvref.value())), val const &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(rvcref.value())), val const &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(*ref), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(*cref), val const &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(*rvref)), val const &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(*rvcref)), val const &&>::value, "result type deduction bug");
auto & ref_id = ref->id; static_assert(std::is_same<decltype(ref_id), int const &>::value, "result type deduction bug");
auto & cref_id = cref->id; static_assert(std::is_same<decltype(cref_id), int const &>::value, "result type deduction bug");
auto & rvref_id = rvref->id; static_assert(std::is_same<decltype(rvref_id), int const &>::value, "result type deduction bug");
auto & rvcref_id = rvcref->id; static_assert(std::is_same<decltype(rvcref_id), int const &>::value, "result type deduction bug");
}
{
val v;
leaf::result<val &> r1(v), r2(v);
leaf::result<val &> & ref = r1;
leaf::result<val &> const & cref = r1;
leaf::result<val &> && rvref = std::move(r1);
leaf::result<val &> const && rvcref = std::move(r2);
static_assert(std::is_same<decltype(ref.value()), val &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(cref.value()), val &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(rvref.value())), val &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(rvcref.value())), val &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(*ref), val &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(*cref), val &>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(*rvref)), val &&>::value, "result type deduction bug");
static_assert(std::is_same<decltype(std::move(*rvcref)), val &&>::value, "result type deduction bug");
auto & ref_id = ref->id; static_assert(std::is_same<decltype(ref_id), int &>::value, "result type deduction bug");
auto & cref_id = cref->id; static_assert(std::is_same<decltype(cref_id), int &>::value, "result type deduction bug");
auto & rvref_id = rvref->id; static_assert(std::is_same<decltype(rvref_id), int &>::value, "result type deduction bug");
auto & rvcref_id = rvcref->id; static_assert(std::is_same<decltype(rvcref_id), int &>::value, "result type deduction bug");
}
test_lvref_access();
#ifndef BOOST_LEAF_NO_CXX11_REF_QUALIFIERS
test_rvref_access();
#endif
// Hierarchy
{
derived d;
leaf::result<base &> r = d;
BOOST_TEST_EQ(&r.value(), &d);
BOOST_TEST_EQ(&*r, &d);
BOOST_TEST_EQ(r.operator->(), &d);
}
{
derived d;
leaf::result<base *> r = &d;
BOOST_TEST_EQ(r.value(), &d);
BOOST_TEST_EQ(*r, &d);
BOOST_TEST_EQ(*r.operator->(), &d);
}
return boost::report_errors();
}
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