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tobtoht
commit
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// Copyright (c) 2022-2024, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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||||||
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Variant wrapper class.
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#pragma once
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//local headers
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//third party headers
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#include <boost/blank.hpp>
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#include <boost/mpl/begin_end.hpp>
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#include <boost/mpl/distance.hpp>
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#include <boost/mpl/find.hpp>
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#include <boost/mpl/for_each.hpp>
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#include <boost/mpl/vector.hpp>
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#include <boost/none_t.hpp>
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#include <boost/variant/apply_visitor.hpp>
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#include <boost/variant/get.hpp>
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#include <boost/variant/static_visitor.hpp>
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#include <boost/variant/variant.hpp>
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//standard headers
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#include <stdexcept>
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#include <type_traits>
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#include <utility>
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//forward declarations
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namespace tools
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{
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namespace detail
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{
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template <class Variant>
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struct value_initialize_on_which
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{
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template <typename T>
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void operator()(T) { if (Variant::template type_index_of<T>() == target_which) v = T(); }
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Variant &v;
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const int target_which;
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};
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} // namespace detail
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[[noreturn]] inline void variant_static_visitor_blank_err()
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{ throw std::runtime_error("variant: tried to visit an empty variant."); }
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[[noreturn]] inline void variant_unwrap_err()
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{ throw std::runtime_error("variant: tried to access value of incorrect type."); }
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////
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// variant: convenience wrapper around boost::variant with a cleaner interface
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// - the variant is 'optional' - an empty variant will evaluate to 'false' and an initialized variant will be 'true'
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///
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template <typename ResultT>
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struct variant_static_visitor : public boost::static_visitor<ResultT>
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{
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/// provide visitation for empty variants
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/// - add this to your visitor with: using variant_static_visitor::operator();
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[[noreturn]] ResultT operator()(const boost::blank) { variant_static_visitor_blank_err(); }
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[[noreturn]] ResultT operator()(const boost::blank) const { variant_static_visitor_blank_err(); }
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};
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template <typename... Types>
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class variant
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{
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using VType = boost::variant<Types...>;
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public:
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//constructors
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/// default constructor
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variant() = default;
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/// construct from variant type (use enable_if to avoid issues with copy/move constructor)
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template <typename T,
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typename std::enable_if<
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!std::is_same<
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std::remove_cv_t<std::remove_reference_t<T>>,
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variant<Types...>
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>::value,
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bool
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>::type = true>
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variant(T &&value) : m_value{std::forward<T>(value)} {}
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//member functions
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/// check the variant type
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template <typename T>
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bool is_type() const noexcept { return this->index() == this->type_index_of<T>(); }
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/// try to get a handle to the embedded value (return nullptr on failure)
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template <typename T>
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T* try_unwrap() noexcept { return boost::strict_get< T>(&m_value); }
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template <typename T>
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const T* try_unwrap() const noexcept { return boost::strict_get<const T>(&m_value); }
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/// get a handle to the embedded value
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template <typename T>
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T& unwrap()
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{
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T *value_ptr{this->try_unwrap<T>()};
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if (!value_ptr) variant_unwrap_err();
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return *value_ptr;
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}
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template <typename T>
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const T& unwrap() const
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{
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const T *value_ptr{this->try_unwrap<T>()};
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if (!value_ptr) variant_unwrap_err();
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return *value_ptr;
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}
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/// get the type index of the currently stored type
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int index() const noexcept { return m_value.which(); }
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/// get the type index of a requested type (compile error for invalid types) (boost::mp11 is boost 1.66.0)
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template <typename T>
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static constexpr int type_index_of() noexcept
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{
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using types = typename VType::types;
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using elem = typename boost::mpl::find<types, T>::type;
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using begin = typename boost::mpl::begin<types>::type;
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return boost::mpl::distance<begin, elem>::value;
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}
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/// check if two variants have the same type
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static bool same_type(const variant<Types...> &v1, const variant<Types...> &v2) noexcept
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{ return v1.index() == v2.index(); }
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/// apply a visitor to the variant
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template <typename VisitorT>
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decltype(auto) visit(VisitorT &&visitor) // decltype(auto) since it forwards the return ref type correctly
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{
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return boost::apply_visitor(std::forward<VisitorT>(visitor), m_value);
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}
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template <typename VisitorT>
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decltype(auto) visit(VisitorT &&visitor) const // decltype(auto) since it forwards the return ref type correctly
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{
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return boost::apply_visitor(std::forward<VisitorT>(visitor), m_value);
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}
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/// value initialize the variant based on a type index
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void value_initialize_to_type_index(const int which)
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{
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if (which < 0 || which >= boost::mpl::size<typename VType::types>::type::value)
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throw std::runtime_error("value_initialize_to_type_index: type index of out range");
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detail::value_initialize_on_which<variant> viow{*this, which};
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boost::mpl::for_each<typename VType::types>(viow);
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}
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private:
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//member variables
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/// variant of all value types
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VType m_value;
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//friend functions
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template <class Archive, typename... Ts>
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friend bool do_serialize(Archive &ar, variant<Ts...> &v);
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};
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template <typename... Types>
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class optional_variant: public variant<boost::blank, Types...>
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{
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public:
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//constructors
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/// default constructor
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optional_variant() = default;
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/// construct from variant type (use enable_if to avoid issues with copy/move constructor)
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template <typename T,
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typename std::enable_if<
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!std::is_same<
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std::remove_cv_t<std::remove_reference_t<T>>,
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optional_variant<Types...>
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>::value,
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bool
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>::type = true>
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optional_variant(T &&value) : variant<boost::blank, Types...>(std::forward<T>(value)) {}
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// construct like boost::optional
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optional_variant(boost::none_t) {}
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//overloaded operators
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/// boolean operator: true if the variant isn't empty/uninitialized
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explicit operator bool() const noexcept { return !this->is_empty(); }
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//member functions
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/// check if empty/uninitialized
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bool is_empty() const noexcept { return this->index() == 0; }
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};
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} //namespace tools
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@ -43,7 +43,6 @@
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/front.hpp>
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#include <boost/mpl/front.hpp>
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#include <boost/mpl/pop_front.hpp>
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#include <boost/mpl/pop_front.hpp>
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#include "common/variant.h"
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#include "serialization.h"
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#include "serialization.h"
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/*! \struct variant_serialization_triats
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/*! \struct variant_serialization_triats
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@ -145,13 +144,3 @@ static bool do_serialize(Archive<true> &ar, boost::variant<T...> &v)
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{
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{
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return boost::apply_visitor(variant_write_visitor<Archive>(ar), v);
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return boost::apply_visitor(variant_write_visitor<Archive>(ar), v);
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}
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}
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// implementation for tools::variant delegates to internal boost::variant member field
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namespace tools
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{
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template <class Archive, typename... Ts>
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bool do_serialize(Archive &ar, variant<Ts...> &v)
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{
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return do_serialize(ar, v.m_value);
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}
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}
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@ -90,7 +90,6 @@ set(unit_tests_sources
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hardfork.cpp
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hardfork.cpp
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unbound.cpp
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unbound.cpp
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uri.cpp
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uri.cpp
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variant.cpp
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util.cpp
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util.cpp
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varint.cpp
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varint.cpp
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ver_rct_non_semantics_simple_cached.cpp
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ver_rct_non_semantics_simple_cached.cpp
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@ -1,563 +0,0 @@
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// Copyright (c) 2023-2024, The Monero Project
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//
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// All rights reserved.
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//
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|
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// Redistribution and use in source and binary forms, with or without modification, are
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|
||||||
// permitted provided that the following conditions are met:
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|
||||||
//
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||||||
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
||||||
// conditions and the following disclaimer.
|
|
||||||
//
|
|
||||||
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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||||||
// of conditions and the following disclaimer in the documentation and/or other
|
|
||||||
// materials provided with the distribution.
|
|
||||||
//
|
|
||||||
// 3. Neither the name of the copyright holder nor the names of its contributors may be
|
|
||||||
// used to endorse or promote products derived from this software without specific
|
|
||||||
// prior written permission.
|
|
||||||
//
|
|
||||||
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
|
|
||||||
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
||||||
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
||||||
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
||||||
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
||||||
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
||||||
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
||||||
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
|
|
||||||
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
||||||
|
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#include "common/variant.h"
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#include <boost/mpl/deref.hpp>
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#include <boost/variant/recursive_wrapper.hpp>
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#include <boost/variant/recursive_variant.hpp>
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#include "gtest/gtest.h"
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#include <sstream>
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#include <type_traits>
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#include <vector>
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using tools::optional_variant;
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using tools::variant;
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using tools::variant_static_visitor;
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|
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|
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namespace
|
|
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{
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|
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//-------------------------------------------------------------------------------------------------------------------
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|
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//-------------------------------------------------------------------------------------------------------------------
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|
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template <typename T>
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|
||||||
using strip_all_t = std::remove_reference_t<std::remove_cv_t<T>>;
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|
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//-------------------------------------------------------------------------------------------------------------------
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|
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//-------------------------------------------------------------------------------------------------------------------
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|
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template <typename T, typename U>
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using strip_same = std::is_same<strip_all_t<T>, strip_all_t<U>>;
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//-------------------------------------------------------------------------------------------------------------------
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|
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//-------------------------------------------------------------------------------------------------------------------
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template
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|
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<
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typename PositiveType,
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typename TestType,
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||||||
typename... VariantTypes,
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||||||
class VecTypes = boost::mpl::vector<VariantTypes...>,
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||||||
class VecBegin = typename boost::mpl::begin<VecTypes>::type,
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||||||
class VecIndexT = typename boost::mpl::find<VecTypes, TestType>::type,
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||||||
size_t TYPE_INDEX = boost::mpl::distance<VecBegin, VecIndexT>::value,
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|
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bool LAST_VARIANT_TYPE = TYPE_INDEX == sizeof...(VariantTypes) - 1
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||||||
>
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static std::enable_if_t<LAST_VARIANT_TYPE>
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test_is_type_match(const variant<VariantTypes...>& v)
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|
||||||
{
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constexpr bool expected = strip_same<PositiveType, TestType>();
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||||||
const bool actual = v.template is_type<TestType>();
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||||||
EXPECT_EQ(expected, actual);
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EXPECT_FALSE(v.template is_type<boost::blank>());
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||||||
}
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|
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//-------------------------------------------------------------------------------------------------------------------
|
|
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//-------------------------------------------------------------------------------------------------------------------
|
|
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template
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|
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<
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typename PositiveType,
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typename TestType,
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|
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typename... VariantTypes,
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class VecTypes = boost::mpl::vector<VariantTypes...>,
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class VecBegin = typename boost::mpl::begin<VecTypes>::type,
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class VecIndexT = typename boost::mpl::find<VecTypes, TestType>::type,
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size_t TYPE_INDEX = boost::mpl::distance<VecBegin, VecIndexT>::value,
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bool LAST_VARIANT_TYPE = TYPE_INDEX == sizeof...(VariantTypes) - 1
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>
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static std::enable_if_t<!LAST_VARIANT_TYPE>
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test_is_type_match(const variant<VariantTypes...>& v)
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||||||
{
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constexpr bool expected = strip_same<PositiveType, TestType>();
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||||||
const bool actual = v.template is_type<TestType>();
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EXPECT_EQ(expected, actual);
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using NextTypeIt = typename boost::mpl::advance<VecIndexT, boost::mpl::int_<1>>::type;
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using NextTestType = typename boost::mpl::deref<NextTypeIt>::type;
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||||||
test_is_type_match<PositiveType, NextTestType>(v);
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|
||||||
}
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|
||||||
//-------------------------------------------------------------------------------------------------------------------
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|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
template
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|
||||||
<
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|
||||||
typename VariantType0,
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|
||||||
typename... VariantTypesRest,
|
|
||||||
typename AssignType
|
|
||||||
>
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|
||||||
static void test_is_type_ref
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|
||||||
(
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|
||||||
variant<VariantType0, VariantTypesRest...>& v,
|
|
||||||
AssignType&& val
|
|
||||||
)
|
|
||||||
{
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|
||||||
v = val;
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|
||||||
test_is_type_match<AssignType, VariantType0>(v);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
template
|
|
||||||
<
|
|
||||||
typename VariantType0,
|
|
||||||
typename... VariantTypesRest,
|
|
||||||
typename AssignType0,
|
|
||||||
typename... AssignTypesRest
|
|
||||||
>
|
|
||||||
static void test_is_type_ref
|
|
||||||
(
|
|
||||||
variant<VariantType0, VariantTypesRest...>& v,
|
|
||||||
AssignType0&& val_0,
|
|
||||||
AssignTypesRest&&... val_rest
|
|
||||||
)
|
|
||||||
{
|
|
||||||
v = val_0;
|
|
||||||
test_is_type_match<AssignType0, VariantType0>(v);
|
|
||||||
test_is_type_ref(v, val_rest...);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
template <typename... VariantTypes>
|
|
||||||
static void test_is_type_full(VariantTypes&&... test_vals)
|
|
||||||
{
|
|
||||||
variant<VariantTypes...> v;
|
|
||||||
test_is_type_ref(v, test_vals...);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
template
|
|
||||||
<
|
|
||||||
size_t IJ = 0,
|
|
||||||
typename... VariantTypes,
|
|
||||||
bool END = IJ == sizeof...(VariantTypes) * sizeof...(VariantTypes)
|
|
||||||
>
|
|
||||||
static std::enable_if_t<END>
|
|
||||||
test_same_type_ref
|
|
||||||
(
|
|
||||||
variant<VariantTypes...>& v1,
|
|
||||||
variant<VariantTypes...>& v2,
|
|
||||||
const std::tuple<VariantTypes...>& tup_i,
|
|
||||||
const std::tuple<VariantTypes...>& tup_j
|
|
||||||
)
|
|
||||||
{ /* trivial end case */ }
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
template
|
|
||||||
<
|
|
||||||
size_t IJ = 0,
|
|
||||||
typename... VariantTypes,
|
|
||||||
bool END = IJ == sizeof...(VariantTypes) * sizeof...(VariantTypes)
|
|
||||||
>
|
|
||||||
static std::enable_if_t<!END>
|
|
||||||
test_same_type_ref
|
|
||||||
(
|
|
||||||
variant<VariantTypes...>& v1,
|
|
||||||
variant<VariantTypes...>& v2,
|
|
||||||
const std::tuple<VariantTypes...>& tup_i,
|
|
||||||
const std::tuple<VariantTypes...>& tup_j
|
|
||||||
)
|
|
||||||
{
|
|
||||||
constexpr size_t I = IJ / sizeof...(VariantTypes);
|
|
||||||
constexpr size_t J = IJ % sizeof...(VariantTypes);
|
|
||||||
constexpr bool expected = I == J;
|
|
||||||
|
|
||||||
v1 = std::get<I>(tup_i);
|
|
||||||
v2 = std::get<J>(tup_j);
|
|
||||||
const bool actual = variant<VariantTypes...>::same_type(v1, v2);
|
|
||||||
|
|
||||||
EXPECT_EQ(expected, actual);
|
|
||||||
|
|
||||||
test_same_type_ref<IJ + 1>(v1, v2, tup_i, tup_j);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
template <typename... VariantTypes>
|
|
||||||
static void test_same_type_full
|
|
||||||
(
|
|
||||||
const std::tuple<VariantTypes...>& vals_i,
|
|
||||||
const std::tuple<VariantTypes...>& vals_j
|
|
||||||
)
|
|
||||||
{
|
|
||||||
using Variant = variant<VariantTypes...>;
|
|
||||||
Variant v_i;
|
|
||||||
Variant v_j;
|
|
||||||
test_same_type_ref(v_i, v_j, vals_i, vals_j);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
struct test_stringify_visitor: public variant_static_visitor<std::string>
|
|
||||||
{
|
|
||||||
template <typename T>
|
|
||||||
static std::string stringify(const T& t)
|
|
||||||
{
|
|
||||||
std::stringstream ss;
|
|
||||||
ss << typeid(T).name();
|
|
||||||
ss << "::";
|
|
||||||
ss << t;
|
|
||||||
return ss.str();
|
|
||||||
}
|
|
||||||
|
|
||||||
template <class Variant, typename T>
|
|
||||||
static void test_visitation(const Variant& v, const T& t)
|
|
||||||
{
|
|
||||||
EXPECT_EQ(test_stringify_visitor::stringify(t), v.visit(test_stringify_visitor()));
|
|
||||||
}
|
|
||||||
|
|
||||||
// Make sure boost::blank errors
|
|
||||||
using variant_static_visitor::operator();
|
|
||||||
|
|
||||||
// Visitation implementation
|
|
||||||
template <typename T>
|
|
||||||
std::string operator()(const T& t) const
|
|
||||||
{
|
|
||||||
return test_stringify_visitor::stringify(t);
|
|
||||||
}
|
|
||||||
};
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
} // anonymous namespace
|
|
||||||
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, operatorbool)
|
|
||||||
{
|
|
||||||
optional_variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
EXPECT_FALSE(v);
|
|
||||||
v = (int16_t) 2023;
|
|
||||||
EXPECT_TRUE(v);
|
|
||||||
v = (int16_t) 0;
|
|
||||||
EXPECT_TRUE(v);
|
|
||||||
v = boost::blank{};
|
|
||||||
EXPECT_FALSE(v);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, is_empty)
|
|
||||||
{
|
|
||||||
optional_variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
EXPECT_TRUE(v.is_empty());
|
|
||||||
v = (int16_t) 2023;
|
|
||||||
EXPECT_FALSE(v.is_empty());
|
|
||||||
v = (int16_t) 0;
|
|
||||||
EXPECT_FALSE(v.is_empty());
|
|
||||||
v = boost::blank{};
|
|
||||||
EXPECT_TRUE(v.is_empty());
|
|
||||||
|
|
||||||
optional_variant<> v2;
|
|
||||||
EXPECT_TRUE(v2.is_empty());
|
|
||||||
v2 = boost::blank{};
|
|
||||||
EXPECT_TRUE(v2.is_empty());
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, is_type)
|
|
||||||
{
|
|
||||||
variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
EXPECT_TRUE(v.is_type<int8_t>());
|
|
||||||
v = (int16_t) 2023;
|
|
||||||
EXPECT_TRUE(v.is_type<int16_t>());
|
|
||||||
|
|
||||||
test_is_type_full((uint32_t) 2023, (char) '\n', std::string("HOWDY"));
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, try_unwrap)
|
|
||||||
{
|
|
||||||
variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
EXPECT_TRUE(v.try_unwrap<int8_t>());
|
|
||||||
v = (int16_t) 5252;
|
|
||||||
ASSERT_TRUE(v.try_unwrap<int16_t>());
|
|
||||||
EXPECT_EQ(5252, *v.try_unwrap<int16_t>());
|
|
||||||
EXPECT_FALSE(v.try_unwrap<uint16_t>());
|
|
||||||
EXPECT_FALSE(v.try_unwrap<std::string>());
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, unwrap)
|
|
||||||
{
|
|
||||||
variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
EXPECT_EQ(0, v.unwrap<int8_t>());
|
|
||||||
v = (int16_t) 5252;
|
|
||||||
EXPECT_EQ(5252, v.unwrap<int16_t>());
|
|
||||||
EXPECT_THROW(v.unwrap<uint16_t>(), std::runtime_error);
|
|
||||||
EXPECT_THROW(v.unwrap<std::string>(), std::runtime_error);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, mutation)
|
|
||||||
{
|
|
||||||
variant<uint8_t> v;
|
|
||||||
v = (uint8_t) 5;
|
|
||||||
EXPECT_EQ(5, v.unwrap<uint8_t>());
|
|
||||||
uint8_t &intref{v.unwrap<uint8_t>()};
|
|
||||||
intref = 10;
|
|
||||||
EXPECT_EQ(10, v.unwrap<uint8_t>());
|
|
||||||
EXPECT_TRUE(v.try_unwrap<uint8_t>());
|
|
||||||
uint8_t *intptr{v.try_unwrap<uint8_t>()};
|
|
||||||
*intptr = 15;
|
|
||||||
EXPECT_EQ(15, v.unwrap<uint8_t>());
|
|
||||||
|
|
||||||
const variant<uint8_t> &v_ref{v};
|
|
||||||
EXPECT_EQ(15, v_ref.unwrap<uint8_t>());
|
|
||||||
EXPECT_TRUE(v_ref.try_unwrap<uint8_t>());
|
|
||||||
EXPECT_EQ(15, *(v_ref.try_unwrap<uint8_t>()));
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, index)
|
|
||||||
{
|
|
||||||
variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
EXPECT_EQ(0, v.index());
|
|
||||||
v = (int8_t) 7;
|
|
||||||
EXPECT_EQ(0, v.index());
|
|
||||||
v = (uint8_t) 7;
|
|
||||||
EXPECT_EQ(1, v.index());
|
|
||||||
v = (int16_t) 7;
|
|
||||||
EXPECT_EQ(2, v.index());
|
|
||||||
v = (uint16_t) 7;
|
|
||||||
EXPECT_EQ(3, v.index());
|
|
||||||
v = "verifiable variant vying for vengence versus visa";
|
|
||||||
EXPECT_EQ(4, v.index());
|
|
||||||
|
|
||||||
optional_variant<int8_t, uint8_t, int16_t, uint16_t, std::string> vo;
|
|
||||||
EXPECT_EQ(0, vo.index());
|
|
||||||
vo = (int8_t) 7;
|
|
||||||
EXPECT_EQ(1, vo.index());
|
|
||||||
vo = (uint8_t) 7;
|
|
||||||
EXPECT_EQ(2, vo.index());
|
|
||||||
vo = (int16_t) 7;
|
|
||||||
EXPECT_EQ(3, vo.index());
|
|
||||||
vo = (uint16_t) 7;
|
|
||||||
EXPECT_EQ(4, vo.index());
|
|
||||||
vo = "verifiable variant vying for vengence versus visa";
|
|
||||||
EXPECT_EQ(5, vo.index());
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, type_index_of)
|
|
||||||
{
|
|
||||||
variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
EXPECT_EQ(0, decltype(v)::type_index_of<int8_t>());
|
|
||||||
EXPECT_EQ(1, decltype(v)::type_index_of<uint8_t>());
|
|
||||||
EXPECT_EQ(2, decltype(v)::type_index_of<int16_t>());
|
|
||||||
EXPECT_EQ(3, decltype(v)::type_index_of<uint16_t>());
|
|
||||||
EXPECT_EQ(4, decltype(v)::type_index_of<std::string>());
|
|
||||||
|
|
||||||
optional_variant<int8_t, uint8_t, int16_t, uint16_t, std::string> vo;
|
|
||||||
EXPECT_EQ(0, decltype(vo)::type_index_of<boost::blank>());
|
|
||||||
EXPECT_EQ(1, decltype(vo)::type_index_of<int8_t>());
|
|
||||||
EXPECT_EQ(2, decltype(vo)::type_index_of<uint8_t>());
|
|
||||||
EXPECT_EQ(3, decltype(vo)::type_index_of<int16_t>());
|
|
||||||
EXPECT_EQ(4, decltype(vo)::type_index_of<uint16_t>());
|
|
||||||
EXPECT_EQ(5, decltype(vo)::type_index_of<std::string>());
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, constexpr_type_index_of)
|
|
||||||
{
|
|
||||||
variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
constexpr int TINDEX2 = decltype(v)::type_index_of<int16_t>();
|
|
||||||
EXPECT_EQ(2, TINDEX2);
|
|
||||||
constexpr int TINDEX4 = decltype(v)::type_index_of<std::string>();
|
|
||||||
EXPECT_EQ(4, TINDEX4);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, same_type)
|
|
||||||
{
|
|
||||||
const std::tuple<int, std::string, char> vals_i(77840, "Hullubaloo", '\0');
|
|
||||||
const std::tuple<int, std::string, char> vals_j(1876, "Canneck", '\t');
|
|
||||||
test_same_type_full(vals_i, vals_j);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, visit)
|
|
||||||
{
|
|
||||||
variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
|
|
||||||
v = "Rev";
|
|
||||||
test_stringify_visitor::test_visitation(v, std::string("Rev"));
|
|
||||||
|
|
||||||
v = (int16_t) 2001;
|
|
||||||
test_stringify_visitor::test_visitation(v, (int16_t) 2001);
|
|
||||||
EXPECT_NE(test_stringify_visitor::stringify((uint16_t) 2001), v.visit(test_stringify_visitor()));
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, visit_lambda)
|
|
||||||
{
|
|
||||||
const auto stringify_lambda = [](auto x) -> std::string
|
|
||||||
{
|
|
||||||
if constexpr (std::is_same_v<decltype(x), std::string>)
|
|
||||||
return x;
|
|
||||||
else if constexpr (std::is_same_v<decltype(x), boost::blank>)
|
|
||||||
throw std::runtime_error("boost blank cannot be stringified");
|
|
||||||
else
|
|
||||||
return std::to_string(x);
|
|
||||||
};
|
|
||||||
|
|
||||||
optional_variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
EXPECT_THROW(v.visit(stringify_lambda), std::runtime_error);
|
|
||||||
|
|
||||||
v = "Rev";
|
|
||||||
EXPECT_EQ("Rev", v.visit(stringify_lambda));
|
|
||||||
|
|
||||||
v = (int16_t) 2001;
|
|
||||||
EXPECT_EQ("2001", v.visit(stringify_lambda));
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, visit_ref_passthru)
|
|
||||||
{
|
|
||||||
struct A
|
|
||||||
{
|
|
||||||
int x;
|
|
||||||
};
|
|
||||||
|
|
||||||
struct B
|
|
||||||
{
|
|
||||||
int x;
|
|
||||||
};
|
|
||||||
|
|
||||||
struct x_ref_visitor: tools::variant_static_visitor<const int&>
|
|
||||||
{
|
|
||||||
using tools::variant_static_visitor<const int&>::operator();
|
|
||||||
|
|
||||||
const int& operator()(const A &a) const { return a.x; }
|
|
||||||
const int& operator()(const B &b) const { return b.x; }
|
|
||||||
};
|
|
||||||
|
|
||||||
optional_variant<A, B> v;
|
|
||||||
EXPECT_THROW(v.visit(x_ref_visitor{}), std::runtime_error);
|
|
||||||
|
|
||||||
// A very hairy looking test, but we're just testing that the reference returned from our static
|
|
||||||
// visitor is actually pointing to something in the same stack space as our variant operand.
|
|
||||||
// This will let us catch mistakes where we take a reference to a locally created variable if
|
|
||||||
// the visit() method is changed subtlely.
|
|
||||||
v = A { 2024 };
|
|
||||||
const char * const px = reinterpret_cast<const char*>(std::addressof(v.visit(x_ref_visitor{})));
|
|
||||||
const char * const pv = reinterpret_cast<const char*>(&v);
|
|
||||||
EXPECT_LT(px - pv, sizeof(v));
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, value_initialize_to_type_index)
|
|
||||||
{
|
|
||||||
optional_variant<int8_t, uint8_t, int16_t, uint16_t, std::string> v;
|
|
||||||
for (int i = 0; i < 6; ++i)
|
|
||||||
{
|
|
||||||
v.value_initialize_to_type_index(i);
|
|
||||||
EXPECT_EQ(i, v.index());
|
|
||||||
}
|
|
||||||
|
|
||||||
v = (int8_t) 69;
|
|
||||||
EXPECT_EQ(1, v.index());
|
|
||||||
EXPECT_EQ(69, v.unwrap<int8_t>());
|
|
||||||
v.value_initialize_to_type_index(1);
|
|
||||||
EXPECT_EQ(1, v.index());
|
|
||||||
EXPECT_EQ(0, v.unwrap<int8_t>());
|
|
||||||
|
|
||||||
v = (uint8_t) 69;
|
|
||||||
EXPECT_EQ(2, v.index());
|
|
||||||
EXPECT_EQ(69, v.unwrap<uint8_t>());
|
|
||||||
v.value_initialize_to_type_index(2);
|
|
||||||
EXPECT_EQ(2, v.index());
|
|
||||||
EXPECT_EQ(0, v.unwrap<uint8_t>());
|
|
||||||
|
|
||||||
v = (int16_t) 69;
|
|
||||||
EXPECT_EQ(3, v.index());
|
|
||||||
EXPECT_EQ(69, v.unwrap<int16_t>());
|
|
||||||
v.value_initialize_to_type_index(3);
|
|
||||||
EXPECT_EQ(3, v.index());
|
|
||||||
EXPECT_EQ(0, v.unwrap<int16_t>());
|
|
||||||
|
|
||||||
v = (uint16_t) 69;
|
|
||||||
EXPECT_EQ(4, v.index());
|
|
||||||
EXPECT_EQ(69, v.unwrap<uint16_t>());
|
|
||||||
v.value_initialize_to_type_index(4);
|
|
||||||
EXPECT_EQ(4, v.index());
|
|
||||||
EXPECT_EQ(0, v.unwrap<uint16_t>());
|
|
||||||
|
|
||||||
v = std::string("69");
|
|
||||||
EXPECT_EQ(5, v.index());
|
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EXPECT_EQ("69", v.unwrap<std::string>());
|
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||||||
v.value_initialize_to_type_index(5);
|
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EXPECT_EQ(5, v.index());
|
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EXPECT_EQ("", v.unwrap<std::string>());
|
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||||||
|
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||||||
v = (int16_t) 69;
|
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v.value_initialize_to_type_index(5);
|
|
||||||
EXPECT_EQ("", v.unwrap<std::string>());
|
|
||||||
|
|
||||||
EXPECT_THROW(v.value_initialize_to_type_index(-1), std::runtime_error);
|
|
||||||
EXPECT_THROW(v.value_initialize_to_type_index(6), std::runtime_error);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
TEST(variant, ad_hoc_recursion)
|
|
||||||
{
|
|
||||||
struct left_t;
|
|
||||||
struct right_t;
|
|
||||||
|
|
||||||
using twisty = optional_variant<boost::recursive_wrapper<left_t>, boost::recursive_wrapper<right_t>>;
|
|
||||||
|
|
||||||
struct left_t
|
|
||||||
{
|
|
||||||
twisty l;
|
|
||||||
};
|
|
||||||
|
|
||||||
struct right_t
|
|
||||||
{
|
|
||||||
twisty r;
|
|
||||||
};
|
|
||||||
|
|
||||||
auto right = [](twisty&& t = {}) -> twisty
|
|
||||||
{
|
|
||||||
right_t r;
|
|
||||||
r.r = t;
|
|
||||||
return r;
|
|
||||||
};
|
|
||||||
|
|
||||||
auto left = [](twisty&& t = {}) -> twisty
|
|
||||||
{
|
|
||||||
left_t l;
|
|
||||||
l.l = t;
|
|
||||||
return l;
|
|
||||||
};
|
|
||||||
|
|
||||||
struct twisty_counter: variant_static_visitor<std::pair<int, int>>
|
|
||||||
{
|
|
||||||
std::pair<int, int> operator()(boost::blank) const
|
|
||||||
{
|
|
||||||
return {0, 0};
|
|
||||||
}
|
|
||||||
|
|
||||||
std::pair<int, int> operator()(const left_t& l) const
|
|
||||||
{
|
|
||||||
auto count = l.l.visit(twisty_counter());
|
|
||||||
count.first += 1;
|
|
||||||
return count;
|
|
||||||
}
|
|
||||||
|
|
||||||
std::pair<int, int> operator()(const right_t& r) const
|
|
||||||
{
|
|
||||||
auto count = r.r.visit(twisty_counter());
|
|
||||||
count.second += 1;
|
|
||||||
return count;
|
|
||||||
}
|
|
||||||
};
|
|
||||||
|
|
||||||
const twisty tw = left(left(right(right(left(right(left(right(left()))))))));
|
|
||||||
|
|
||||||
int left_count, right_count;
|
|
||||||
std::tie(left_count, right_count) = tw.visit(twisty_counter());
|
|
||||||
|
|
||||||
EXPECT_EQ(5, left_count);
|
|
||||||
EXPECT_EQ(4, right_count);
|
|
||||||
}
|
|
||||||
//-------------------------------------------------------------------------------------------------------------------
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue