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// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
#ifndef CATCH_MATCHERS_TEMPLATED_HPP_INCLUDED
#define CATCH_MATCHERS_TEMPLATED_HPP_INCLUDED
#include <catch2/matchers/catch_matchers.hpp>
#include <catch2/internal/catch_stringref.hpp>
#include <catch2/internal/catch_move_and_forward.hpp>
#include <catch2/internal/catch_logical_traits.hpp>
#include <array>
#include <algorithm>
#include <string>
#include <type_traits>
namespace Catch {
namespace Matchers {
class MatcherGenericBase : public MatcherUntypedBase {
public:
MatcherGenericBase() = default;
~MatcherGenericBase() override; // = default;
MatcherGenericBase(MatcherGenericBase const&) = default;
MatcherGenericBase(MatcherGenericBase&&) = default;
MatcherGenericBase& operator=(MatcherGenericBase const&) = delete;
MatcherGenericBase& operator=(MatcherGenericBase&&) = delete;
};
namespace Detail {
template<std::size_t N, std::size_t M>
std::array<void const*, N + M> array_cat(std::array<void const*, N> && lhs, std::array<void const*, M> && rhs) {
std::array<void const*, N + M> arr{};
std::copy_n(lhs.begin(), N, arr.begin());
std::copy_n(rhs.begin(), M, arr.begin() + N);
return arr;
}
template<std::size_t N>
std::array<void const*, N+1> array_cat(std::array<void const*, N> && lhs, void const* rhs) {
std::array<void const*, N+1> arr{};
std::copy_n(lhs.begin(), N, arr.begin());
arr[N] = rhs;
return arr;
}
template<std::size_t N>
std::array<void const*, N+1> array_cat(void const* lhs, std::array<void const*, N> && rhs) {
std::array<void const*, N + 1> arr{ {lhs} };
std::copy_n(rhs.begin(), N, arr.begin() + 1);
return arr;
}
template<typename T>
using is_generic_matcher = std::is_base_of<
Catch::Matchers::MatcherGenericBase,
std::remove_cv_t<std::remove_reference_t<T>>
>;
template<typename... Ts>
using are_generic_matchers = Catch::Detail::conjunction<is_generic_matcher<Ts>...>;
template<typename T>
using is_matcher = std::is_base_of<
Catch::Matchers::MatcherUntypedBase,
std::remove_cv_t<std::remove_reference_t<T>>
>;
template<std::size_t N, typename Arg>
bool match_all_of(Arg&&, std::array<void const*, N> const&, std::index_sequence<>) {
return true;
}
template<typename T, typename... MatcherTs, std::size_t N, typename Arg, std::size_t Idx, std::size_t... Indices>
bool match_all_of(Arg&& arg, std::array<void const*, N> const& matchers, std::index_sequence<Idx, Indices...>) {
return static_cast<T const*>(matchers[Idx])->match(arg) && match_all_of<MatcherTs...>(arg, matchers, std::index_sequence<Indices...>{});
}
template<std::size_t N, typename Arg>
bool match_any_of(Arg&&, std::array<void const*, N> const&, std::index_sequence<>) {
return false;
}
template<typename T, typename... MatcherTs, std::size_t N, typename Arg, std::size_t Idx, std::size_t... Indices>
bool match_any_of(Arg&& arg, std::array<void const*, N> const& matchers, std::index_sequence<Idx, Indices...>) {
return static_cast<T const*>(matchers[Idx])->match(arg) || match_any_of<MatcherTs...>(arg, matchers, std::index_sequence<Indices...>{});
}
std::string describe_multi_matcher(StringRef combine, std::string const* descriptions_begin, std::string const* descriptions_end);
template<typename... MatcherTs, std::size_t... Idx>
std::string describe_multi_matcher(StringRef combine, std::array<void const*, sizeof...(MatcherTs)> const& matchers, std::index_sequence<Idx...>) {
std::array<std::string, sizeof...(MatcherTs)> descriptions {{
static_cast<MatcherTs const*>(matchers[Idx])->toString()...
}};
return describe_multi_matcher(combine, descriptions.data(), descriptions.data() + descriptions.size());
}
template<typename... MatcherTs>
class MatchAllOfGeneric final : public MatcherGenericBase {
public:
MatchAllOfGeneric(MatchAllOfGeneric const&) = delete;
MatchAllOfGeneric& operator=(MatchAllOfGeneric const&) = delete;
MatchAllOfGeneric(MatchAllOfGeneric&&) = default;
MatchAllOfGeneric& operator=(MatchAllOfGeneric&&) = default;
MatchAllOfGeneric(MatcherTs const&... matchers) : m_matchers{ {std::addressof(matchers)...} } {}
explicit MatchAllOfGeneric(std::array<void const*, sizeof...(MatcherTs)> matchers) : m_matchers{matchers} {}
template<typename Arg>
bool match(Arg&& arg) const {
return match_all_of<MatcherTs...>(arg, m_matchers, std::index_sequence_for<MatcherTs...>{});
}
std::string describe() const override {
return describe_multi_matcher<MatcherTs...>(" and "_sr, m_matchers, std::index_sequence_for<MatcherTs...>{});
}
// Has to be public to enable the concatenating operators
// below, because they are not friend of the RHS, only LHS,
// and thus cannot access private fields of RHS
std::array<void const*, sizeof...( MatcherTs )> m_matchers;
//! Avoids type nesting for `GenericAllOf && GenericAllOf` case
template<typename... MatchersRHS>
friend
MatchAllOfGeneric<MatcherTs..., MatchersRHS...> operator && (
MatchAllOfGeneric<MatcherTs...>&& lhs,
MatchAllOfGeneric<MatchersRHS...>&& rhs) {
return MatchAllOfGeneric<MatcherTs..., MatchersRHS...>{array_cat(CATCH_MOVE(lhs.m_matchers), CATCH_MOVE(rhs.m_matchers))};
}
//! Avoids type nesting for `GenericAllOf && some matcher` case
template<typename MatcherRHS>
friend std::enable_if_t<is_matcher<MatcherRHS>::value,
MatchAllOfGeneric<MatcherTs..., MatcherRHS>> operator && (
MatchAllOfGeneric<MatcherTs...>&& lhs,
MatcherRHS const& rhs) {
return MatchAllOfGeneric<MatcherTs..., MatcherRHS>{array_cat(CATCH_MOVE(lhs.m_matchers), static_cast<void const*>(&rhs))};
}
//! Avoids type nesting for `some matcher && GenericAllOf` case
template<typename MatcherLHS>
friend std::enable_if_t<is_matcher<MatcherLHS>::value,
MatchAllOfGeneric<MatcherLHS, MatcherTs...>> operator && (
MatcherLHS const& lhs,
MatchAllOfGeneric<MatcherTs...>&& rhs) {
return MatchAllOfGeneric<MatcherLHS, MatcherTs...>{array_cat(static_cast<void const*>(std::addressof(lhs)), CATCH_MOVE(rhs.m_matchers))};
}
};
template<typename... MatcherTs>
class MatchAnyOfGeneric final : public MatcherGenericBase {
public:
MatchAnyOfGeneric(MatchAnyOfGeneric const&) = delete;
MatchAnyOfGeneric& operator=(MatchAnyOfGeneric const&) = delete;
MatchAnyOfGeneric(MatchAnyOfGeneric&&) = default;
MatchAnyOfGeneric& operator=(MatchAnyOfGeneric&&) = default;
MatchAnyOfGeneric(MatcherTs const&... matchers) : m_matchers{ {std::addressof(matchers)...} } {}
explicit MatchAnyOfGeneric(std::array<void const*, sizeof...(MatcherTs)> matchers) : m_matchers{matchers} {}
template<typename Arg>
bool match(Arg&& arg) const {
return match_any_of<MatcherTs...>(arg, m_matchers, std::index_sequence_for<MatcherTs...>{});
}
std::string describe() const override {
return describe_multi_matcher<MatcherTs...>(" or "_sr, m_matchers, std::index_sequence_for<MatcherTs...>{});
}
// Has to be public to enable the concatenating operators
// below, because they are not friend of the RHS, only LHS,
// and thus cannot access private fields of RHS
std::array<void const*, sizeof...( MatcherTs )> m_matchers;
//! Avoids type nesting for `GenericAnyOf || GenericAnyOf` case
template<typename... MatchersRHS>
friend MatchAnyOfGeneric<MatcherTs..., MatchersRHS...> operator || (
MatchAnyOfGeneric<MatcherTs...>&& lhs,
MatchAnyOfGeneric<MatchersRHS...>&& rhs) {
return MatchAnyOfGeneric<MatcherTs..., MatchersRHS...>{array_cat(CATCH_MOVE(lhs.m_matchers), CATCH_MOVE(rhs.m_matchers))};
}
//! Avoids type nesting for `GenericAnyOf || some matcher` case
template<typename MatcherRHS>
friend std::enable_if_t<is_matcher<MatcherRHS>::value,
MatchAnyOfGeneric<MatcherTs..., MatcherRHS>> operator || (
MatchAnyOfGeneric<MatcherTs...>&& lhs,
MatcherRHS const& rhs) {
return MatchAnyOfGeneric<MatcherTs..., MatcherRHS>{array_cat(CATCH_MOVE(lhs.m_matchers), static_cast<void const*>(std::addressof(rhs)))};
}
//! Avoids type nesting for `some matcher || GenericAnyOf` case
template<typename MatcherLHS>
friend std::enable_if_t<is_matcher<MatcherLHS>::value,
MatchAnyOfGeneric<MatcherLHS, MatcherTs...>> operator || (
MatcherLHS const& lhs,
MatchAnyOfGeneric<MatcherTs...>&& rhs) {
return MatchAnyOfGeneric<MatcherLHS, MatcherTs...>{array_cat(static_cast<void const*>(std::addressof(lhs)), CATCH_MOVE(rhs.m_matchers))};
}
};
template<typename MatcherT>
class MatchNotOfGeneric final : public MatcherGenericBase {
MatcherT const& m_matcher;
public:
MatchNotOfGeneric(MatchNotOfGeneric const&) = delete;
MatchNotOfGeneric& operator=(MatchNotOfGeneric const&) = delete;
MatchNotOfGeneric(MatchNotOfGeneric&&) = default;
MatchNotOfGeneric& operator=(MatchNotOfGeneric&&) = default;
explicit MatchNotOfGeneric(MatcherT const& matcher) : m_matcher{matcher} {}
template<typename Arg>
bool match(Arg&& arg) const {
return !m_matcher.match(arg);
}
std::string describe() const override {
return "not " + m_matcher.toString();
}
//! Negating negation can just unwrap and return underlying matcher
friend MatcherT const& operator ! (MatchNotOfGeneric<MatcherT> const& matcher) {
return matcher.m_matcher;
}
};
} // namespace Detail
// compose only generic matchers
template<typename MatcherLHS, typename MatcherRHS>
std::enable_if_t<Detail::are_generic_matchers<MatcherLHS, MatcherRHS>::value, Detail::MatchAllOfGeneric<MatcherLHS, MatcherRHS>>
operator && (MatcherLHS const& lhs, MatcherRHS const& rhs) {
return { lhs, rhs };
}
template<typename MatcherLHS, typename MatcherRHS>
std::enable_if_t<Detail::are_generic_matchers<MatcherLHS, MatcherRHS>::value, Detail::MatchAnyOfGeneric<MatcherLHS, MatcherRHS>>
operator || (MatcherLHS const& lhs, MatcherRHS const& rhs) {
return { lhs, rhs };
}
//! Wrap provided generic matcher in generic negator
template<typename MatcherT>
std::enable_if_t<Detail::is_generic_matcher<MatcherT>::value, Detail::MatchNotOfGeneric<MatcherT>>
operator ! (MatcherT const& matcher) {
return Detail::MatchNotOfGeneric<MatcherT>{matcher};
}
// compose mixed generic and non-generic matchers
template<typename MatcherLHS, typename ArgRHS>
std::enable_if_t<Detail::is_generic_matcher<MatcherLHS>::value, Detail::MatchAllOfGeneric<MatcherLHS, MatcherBase<ArgRHS>>>
operator && (MatcherLHS const& lhs, MatcherBase<ArgRHS> const& rhs) {
return { lhs, rhs };
}
template<typename ArgLHS, typename MatcherRHS>
std::enable_if_t<Detail::is_generic_matcher<MatcherRHS>::value, Detail::MatchAllOfGeneric<MatcherBase<ArgLHS>, MatcherRHS>>
operator && (MatcherBase<ArgLHS> const& lhs, MatcherRHS const& rhs) {
return { lhs, rhs };
}
template<typename MatcherLHS, typename ArgRHS>
std::enable_if_t<Detail::is_generic_matcher<MatcherLHS>::value, Detail::MatchAnyOfGeneric<MatcherLHS, MatcherBase<ArgRHS>>>
operator || (MatcherLHS const& lhs, MatcherBase<ArgRHS> const& rhs) {
return { lhs, rhs };
}
template<typename ArgLHS, typename MatcherRHS>
std::enable_if_t<Detail::is_generic_matcher<MatcherRHS>::value, Detail::MatchAnyOfGeneric<MatcherBase<ArgLHS>, MatcherRHS>>
operator || (MatcherBase<ArgLHS> const& lhs, MatcherRHS const& rhs) {
return { lhs, rhs };
}
} // namespace Matchers
} // namespace Catch
#endif // CATCH_MATCHERS_TEMPLATED_HPP_INCLUDED
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