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relops.cpp
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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 <string>
#include <gtest/gtest.h>
#include <mpark/config.hpp>
#include "util.hpp"
TEST(Rel, SameTypeSameValue) {
mpark::variant<int, std::string> v(0), w(0);
// `v` op `w`
EXPECT_TRUE(v == w);
EXPECT_FALSE(v != w);
EXPECT_FALSE(v < w);
EXPECT_FALSE(v > w);
EXPECT_TRUE(v <= w);
EXPECT_TRUE(v >= w);
// `w` op `v`
EXPECT_TRUE(w == v);
EXPECT_FALSE(w != v);
EXPECT_FALSE(w < v);
EXPECT_FALSE(w > v);
EXPECT_TRUE(w <= v);
EXPECT_TRUE(w >= v);
#ifdef MPARK_CPP11_CONSTEXPR
/* constexpr */ {
constexpr mpark::variant<int, const char *> cv(0), cw(0);
// `cv` op `cw`
static_assert(cv == cw, "");
static_assert(!(cv != cw), "");
static_assert(!(cv < cw), "");
static_assert(!(cv > cw), "");
static_assert(cv <= cw, "");
static_assert(cv >= cw, "");
// `cw` op `cv`
static_assert(cw == cv, "");
static_assert(!(cw != cv), "");
static_assert(!(cw < cv), "");
static_assert(!(cw > cv), "");
static_assert(cw <= cv, "");
static_assert(cw >= cv, "");
}
#endif
}
TEST(Rel, SameTypeDiffValue) {
mpark::variant<int, std::string> v(0), w(1);
// `v` op `w`
EXPECT_FALSE(v == w);
EXPECT_TRUE(v != w);
EXPECT_TRUE(v < w);
EXPECT_FALSE(v > w);
EXPECT_TRUE(v <= w);
EXPECT_FALSE(v >= w);
// `w` op `v`
EXPECT_FALSE(w == v);
EXPECT_TRUE(w != v);
EXPECT_FALSE(w < v);
EXPECT_TRUE(w > v);
EXPECT_FALSE(w <= v);
EXPECT_TRUE(w >= v);
#ifdef MPARK_CPP11_CONSTEXPR
/* constexpr */ {
constexpr mpark::variant<int, const char *> cv(0), cw(1);
// `cv` op `cw`
static_assert(!(cv == cw), "");
static_assert(cv != cw, "");
static_assert(cv < cw, "");
static_assert(!(cv > cw), "");
static_assert(cv <= cw, "");
static_assert(!(cv >= cw), "");
// `cw` op `cv`
static_assert(!(cw == cv), "");
static_assert(cw != cv, "");
static_assert(!(cw < cv), "");
static_assert(cw > cv, "");
static_assert(!(cw <= cv), "");
static_assert(cw >= cv, "");
}
#endif
}
TEST(Rel, DiffTypeSameValue) {
mpark::variant<int, unsigned int> v(0), w(0u);
// `v` op `w`
EXPECT_FALSE(v == w);
EXPECT_TRUE(v != w);
EXPECT_TRUE(v < w);
EXPECT_FALSE(v > w);
EXPECT_TRUE(v <= w);
EXPECT_FALSE(v >= w);
// `w` op `v`
EXPECT_FALSE(w == v);
EXPECT_TRUE(w != v);
EXPECT_FALSE(w < v);
EXPECT_TRUE(w > v);
EXPECT_FALSE(w <= v);
EXPECT_TRUE(w >= v);
#ifdef MPARK_CPP11_CONSTEXPR
/* constexpr */ {
constexpr mpark::variant<int, unsigned int> cv(0), cw(0u);
// `cv` op `cw`
static_assert(!(cv == cw), "");
static_assert(cv != cw, "");
static_assert(cv < cw, "");
static_assert(!(cv > cw), "");
static_assert(cv <= cw, "");
static_assert(!(cv >= cw), "");
// `cw` op `cv`
static_assert(!(cw == cv), "");
static_assert(cw != cv, "");
static_assert(!(cw < cv), "");
static_assert(cw > cv, "");
static_assert(!(cw <= cv), "");
static_assert(cw >= cv, "");
}
#endif
}
TEST(Rel, DiffTypeDiffValue) {
mpark::variant<int, unsigned int> v(0), w(1u);
// `v` op `w`
EXPECT_FALSE(v == w);
EXPECT_TRUE(v != w);
EXPECT_TRUE(v < w);
EXPECT_FALSE(v > w);
EXPECT_TRUE(v <= w);
EXPECT_FALSE(v >= w);
// `w` op `v`
EXPECT_FALSE(w == v);
EXPECT_TRUE(w != v);
EXPECT_FALSE(w < v);
EXPECT_TRUE(w > v);
EXPECT_FALSE(w <= v);
EXPECT_TRUE(w >= v);
#ifdef MPARK_CPP11_CONSTEXPR
/* constexpr */ {
constexpr mpark::variant<int, unsigned int> cv(0), cw(1u);
// `cv` op `cw`
static_assert(!(cv == cw), "");
static_assert(cv != cw, "");
static_assert(cv < cw, "");
static_assert(!(cv > cw), "");
static_assert(cv <= cw, "");
static_assert(!(cv >= cw), "");
// `cw` op `cv`
static_assert(!(cw == cv), "");
static_assert(cw != cv, "");
static_assert(!(cw < cv), "");
static_assert(cw > cv, "");
static_assert(!(cw <= cv), "");
static_assert(cw >= cv, "");
}
#endif
}
#ifdef MPARK_EXCEPTIONS
TEST(Rel, OneValuelessByException) {
// `v` normal, `w` corrupted.
mpark::variant<int, move_thrower_t> v(42), w(42);
EXPECT_THROW(w = move_thrower_t{}, MoveConstruction);
EXPECT_FALSE(v.valueless_by_exception());
EXPECT_TRUE(w.valueless_by_exception());
// `v` op `w`
EXPECT_FALSE(v == w);
EXPECT_TRUE(v != w);
EXPECT_FALSE(v < w);
EXPECT_TRUE(v > w);
EXPECT_FALSE(v <= w);
EXPECT_TRUE(v >= w);
}
TEST(Rel, BothValuelessByException) {
// `v`, `w` both corrupted.
mpark::variant<int, move_thrower_t> v(42);
EXPECT_THROW(v = move_thrower_t{}, MoveConstruction);
mpark::variant<int, move_thrower_t> w(v);
EXPECT_TRUE(v.valueless_by_exception());
EXPECT_TRUE(w.valueless_by_exception());
// `v` op `w`
EXPECT_TRUE(v == w);
EXPECT_FALSE(v != w);
EXPECT_FALSE(v < w);
EXPECT_FALSE(v > w);
EXPECT_TRUE(v <= w);
EXPECT_TRUE(v >= w);
}
#endif