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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef TEST_TRANSPARENT_UNORDERED_H
#define TEST_TRANSPARENT_UNORDERED_H
#include "test_macros.h"
#include "is_transparent.h"
#include <cassert>
#if TEST_STD_VER > 17
template <typename T>
struct StoredType;
template <typename T>
struct SearchedType;
struct hash_impl {
template <typename T>
constexpr std::size_t operator()(SearchedType<T> const& t) const {
return static_cast<std::size_t>(t.get_value());
}
template <typename T>
constexpr std::size_t operator()(StoredType<T> const& t) const {
return static_cast<std::size_t>(t.get_value());
}
};
struct non_transparent_hash : hash_impl {};
struct transparent_hash : hash_impl {
using is_transparent = void;
};
struct transparent_hash_final final : transparent_hash {};
struct transparent_equal_final final : std::equal_to<> {};
template <typename T>
struct SearchedType {
explicit SearchedType(T value, int *counter) : value_(value), conversions_(counter) { }
// Whenever a conversion is performed, increment the counter to keep track
// of conversions.
operator StoredType<T>() const {
++*conversions_;
return StoredType<T>{value_};
}
int get_value() const {
return value_;
}
private:
T value_;
int *conversions_;
};
template <typename T>
struct StoredType {
StoredType() = default;
StoredType(T value) : value_(value) { }
friend bool operator==(StoredType const& lhs, StoredType const& rhs) {
return lhs.value_ == rhs.value_;
}
// If we're being passed a SearchedType<T> object, avoid the conversion
// to T. This allows testing that the transparent operations are correctly
// forwarding the SearchedType all the way to this comparison by checking
// that we didn't have a conversion when we search for a SearchedType<T>
// in a container full of StoredType<T>.
friend bool operator==(StoredType const& lhs, SearchedType<T> const& rhs) {
return lhs.value_ == rhs.get_value();
}
int get_value() const {
return value_;
}
private:
T value_;
};
template<template<class...> class UnorderedSet, class Hash, class Equal>
using unord_set_type = UnorderedSet<StoredType<int>, Hash, Equal>;
template<template<class...> class UnorderedMap, class Hash, class Equal>
using unord_map_type = UnorderedMap<StoredType<int>, int, Hash, Equal>;
template<class Container>
void test_transparent_find(Container c) {
int conversions = 0;
assert(c.find(SearchedType<int>(1, &conversions)) != c.end());
assert(c.find(SearchedType<int>(2, &conversions)) != c.end());
assert(c.find(SearchedType<int>(3, &conversions)) == c.end());
assert(conversions == 0);
}
template<class Container>
void test_non_transparent_find(Container c) {
int conversions = 0;
assert(c.find(SearchedType<int>(1, &conversions)) != c.end());
assert(conversions == 1);
assert(c.find(SearchedType<int>(2, &conversions)) != c.end());
assert(conversions == 2);
assert(c.find(SearchedType<int>(3, &conversions)) == c.end());
assert(conversions == 3);
}
template<class Container>
void test_transparent_count(Container c) {
int conversions = 0;
assert(c.count(SearchedType<int>(1, &conversions)) > 0);
assert(c.count(SearchedType<int>(2, &conversions)) > 0);
assert(c.count(SearchedType<int>(3, &conversions)) == 0);
assert(conversions == 0);
}
template<class Container>
void test_non_transparent_count(Container c) {
int conversions = 0;
assert(c.count(SearchedType<int>(1, &conversions)) > 0);
assert(conversions == 1);
assert(c.count(SearchedType<int>(2, &conversions)) > 0);
assert(conversions == 2);
assert(c.count(SearchedType<int>(3, &conversions)) == 0);
assert(conversions == 3);
}
template<class Container>
void test_transparent_contains(Container c) {
int conversions = 0;
assert(c.contains(SearchedType<int>(1, &conversions)));
assert(c.contains(SearchedType<int>(2, &conversions)));
assert(!c.contains(SearchedType<int>(3, &conversions)));
assert(conversions == 0);
}
template<class Container>
void test_non_transparent_contains(Container c) {
int conversions = 0;
assert(c.contains(SearchedType<int>(1, &conversions)));
assert(conversions == 1);
assert(c.contains(SearchedType<int>(2, &conversions)));
assert(conversions == 2);
assert(!c.contains(SearchedType<int>(3, &conversions)));
assert(conversions == 3);
}
template<class Container>
void test_transparent_equal_range(Container c) {
int conversions = 0;
auto iters = c.equal_range(SearchedType<int>(1, &conversions));
assert(std::distance(iters.first, iters.second) > 0);
iters = c.equal_range(SearchedType<int>(2, &conversions));
assert(std::distance(iters.first, iters.second) > 0);
iters = c.equal_range(SearchedType<int>(3, &conversions));
assert(std::distance(iters.first, iters.second) == 0);
assert(conversions == 0);
}
template<class Container>
void test_non_transparent_equal_range(Container c) {
int conversions = 0;
auto iters = c.equal_range(SearchedType<int>(1, &conversions));
assert(std::distance(iters.first, iters.second) > 0);
assert(conversions == 1);
iters = c.equal_range(SearchedType<int>(2, &conversions));
assert(std::distance(iters.first, iters.second) > 0);
assert(conversions == 2);
iters = c.equal_range(SearchedType<int>(3, &conversions));
assert(std::distance(iters.first, iters.second) == 0);
assert(conversions == 3);
}
#endif // TEST_STD_VER > 17
#endif // TEST_TRANSPARENT_UNORDERED_H
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