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// MPark.Variant
//
// Copyright Michael Park, 2015-2017
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <mpark/variant.hpp>
#include <gtest/gtest.h>
#include "util.hpp"
namespace lib = mpark::lib;
TEST(Get, HoldsAlternative) {
mpark::variant<int, std::string> v(42);
EXPECT_TRUE(mpark::holds_alternative<0>(v));
EXPECT_FALSE(mpark::holds_alternative<1>(v));
EXPECT_TRUE(mpark::holds_alternative<int>(v));
EXPECT_FALSE(mpark::holds_alternative<std::string>(v));
/* constexpr */ {
constexpr mpark::variant<int, const char *> cv(42);
static_assert(mpark::holds_alternative<0>(cv), "");
static_assert(!mpark::holds_alternative<1>(cv), "");
static_assert(mpark::holds_alternative<int>(cv), "");
static_assert(!mpark::holds_alternative<const char *>(cv), "");
}
}
TEST(Get, MutVarMutType) {
mpark::variant<int> v(42);
EXPECT_EQ(42, mpark::get<int>(v));
// Check qualifier.
EXPECT_EQ(LRef, get_qual(mpark::get<int>(v)));
EXPECT_EQ(RRef, get_qual(mpark::get<int>(lib::move(v))));
}
TEST(Get, MutVarConstType) {
mpark::variant<const int> v(42);
EXPECT_EQ(42, mpark::get<const int>(v));
// Check qualifier.
EXPECT_EQ(ConstLRef, get_qual(mpark::get<const int>(v)));
EXPECT_EQ(ConstRRef, get_qual(mpark::get<const int>(lib::move(v))));
}
TEST(Get, ConstVarMutType) {
const mpark::variant<int> v(42);
EXPECT_EQ(42, mpark::get<int>(v));
// Check qualifier.
EXPECT_EQ(ConstLRef, get_qual(mpark::get<int>(v)));
EXPECT_EQ(ConstRRef, get_qual(mpark::get<int>(lib::move(v))));
/* constexpr */ {
constexpr mpark::variant<int> cv(42);
static_assert(42 == mpark::get<int>(cv), "");
// Check qualifier.
static_assert(ConstLRef == get_qual(mpark::get<int>(cv)), "");
static_assert(ConstRRef == get_qual(mpark::get<int>(lib::move(cv))), "");
}
}
TEST(Get, ConstVarConstType) {
const mpark::variant<const int> v(42);
EXPECT_EQ(42, mpark::get<const int>(v));
// Check qualifier.
EXPECT_EQ(ConstLRef, get_qual(mpark::get<const int>(v)));
EXPECT_EQ(ConstRRef, get_qual(mpark::get<const int>(lib::move(v))));
/* constexpr */ {
constexpr mpark::variant<const int> cv(42);
static_assert(42 == mpark::get<const int>(cv), "");
// Check qualifier.
static_assert(ConstLRef == get_qual(mpark::get<const int>(cv)), "");
static_assert(ConstRRef == get_qual(mpark::get<const int>(lib::move(cv))),
"");
}
}
#ifdef MPARK_EXCEPTIONS
TEST(Get, ValuelessByException) {
mpark::variant<int, move_thrower_t> v(42);
EXPECT_THROW(v = move_thrower_t{}, MoveConstruction);
EXPECT_TRUE(v.valueless_by_exception());
EXPECT_THROW(mpark::get<int>(v), mpark::bad_variant_access);
EXPECT_THROW(mpark::get<move_thrower_t>(v), mpark::bad_variant_access);
}
#endif
TEST(GetIf, MutVarMutType) {
mpark::variant<int> v(42);
EXPECT_EQ(42, *mpark::get_if<int>(&v));
// Check qualifier.
EXPECT_EQ(Ptr, get_qual(mpark::get_if<int>(&v)));
}
TEST(GetIf, MutVarConstType) {
mpark::variant<const int> v(42);
EXPECT_EQ(42, *mpark::get_if<const int>(&v));
// Check qualifier.
EXPECT_EQ(ConstPtr, get_qual(mpark::get_if<const int>(&v)));
}
TEST(GetIf, ConstVarMutType) {
const mpark::variant<int> v(42);
EXPECT_EQ(42, *mpark::get_if<int>(&v));
// Check qualifier.
EXPECT_EQ(ConstPtr, get_qual(mpark::get_if<int>(&v)));
/* constexpr */ {
static constexpr mpark::variant<int> cv(42);
static_assert(42 == *mpark::get_if<int>(&cv), "");
// Check qualifier.
static_assert(ConstPtr == get_qual(mpark::get_if<int>(&cv)), "");
}
}
TEST(GetIf, ConstVarConstType) {
const mpark::variant<const int> v(42);
EXPECT_EQ(42, *mpark::get_if<const int>(&v));
// Check qualifier.
EXPECT_EQ(ConstPtr, get_qual(mpark::get_if<const int>(&v)));
/* constexpr */ {
static constexpr mpark::variant<const int> cv(42);
static_assert(42 == *mpark::get_if<const int>(&cv), "");
// Check qualifier.
static_assert(ConstPtr == get_qual(mpark::get_if<const int>(&cv)), "");
}
}
#ifdef MPARK_EXCEPTONS
TEST(GetIf, ValuelessByException) {
mpark::variant<int, move_thrower_t> v(42);
EXPECT_THROW(v = move_thrower_t{}, MoveConstruction);
EXPECT_TRUE(v.valueless_by_exception());
EXPECT_EQ(nullptr, mpark::get_if<int>(&v));
EXPECT_EQ(nullptr, mpark::get_if<move_thrower_t>(&v));
}
#endif
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