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packages.biu: fix

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This commit is contained in:
陈浩南
2024-11-24 20:46:48 +08:00
parent bdd5a4bbed
commit 64f6c43c2e
3 changed files with 48 additions and 1 deletions
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4
packages/biu/include/biu/common.hpp
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@@ -117,9 +117,11 @@ namespace biu
template <typename T> T& operator|(T&& obj, const ToLvalueHelper&);
}
constexpr detail_::ToLvalueHelper toLvalue;
template <typename Function, typename T, typename... Ts> void for_each(Function&& function, T&& arg, Ts&&... args);
}
using common::hash, common::unused, common::block_forever, common::is_interactive, common::env, common::int128_t,
common::uint128_t, common::Empty, common::CaseInsensitiveStringLessComparator, common::RemoveMemberPointer,
common::MoveQualifiers, common::FallbackIfNoTypeDeclared, common::exec, common::sequence, common::read,
common::toLvalue;
common::toLvalue, common::for_each;
}

27
packages/biu/include/biu/common.tpp
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@@ -46,4 +46,31 @@ namespace biu::common
return sequence(from, to);
}
template <typename T> T& detail_::operator|(T&& obj, const ToLvalueHelper&) { return static_cast<T&>(obj); }
template <typename Function, typename T, typename... Ts> void for_each(Function&& function, T&& arg, Ts&&... args)
{
if constexpr (sizeof...(Ts) == 0)
{
[&]<std::size_t... Is>(std::index_sequence<Is...>)
{ (std::forward<Function>(function)(std::get<Is>(std::forward<T>(arg))) , ...); }
(std::make_index_sequence<sizeof...(Ts)>{});
}
else
{
[&]<typename Tuple, std::size_t... Is>(std::index_sequence<Is...>, Tuple&& tuple)
{
([&]<std::size_t I, std::size_t... Js>(std::index_sequence<Js...>) -> decltype(auto)
{
std::apply
(
std::forward<Function>(function),
std::forward_as_tuple(std::get<I>(std::get<Js>(std::forward<Tuple>(tuple)))...));
}.template operator()<Is>(std::make_index_sequence<std::tuple_size_v<Tuple>>{}), ...);
}
(
std::make_index_sequence<std::tuple_size_v<T>>{},
std::forward_as_tuple(std::forward<T>(arg), std::forward<Ts>(args)...)
);
}
}
}

18
packages/biu/test/common.cpp
View File

@@ -10,4 +10,22 @@ int main()
| biu::toLvalue
| ranges::views::transform([](int i){ return i + 1; })
| ranges::to_vector;
struct test_struct
{
int a = 1;
double b = 2;
std::string c = "3";
} c;
biu::for_each([&](auto&& i){ std::cout << c.*i << '\n'; },
std::tuple(&test_struct::a, &test_struct::b, &test_struct::c));
struct test_struct2
{
int a = 4;
double b = 5;
std::string c = "6";
} d;
biu::for_each([&](auto&& i, auto&& j){ c.*i = d.*j; },
std::tuple(&test_struct::a, &test_struct::b, &test_struct::c),
std::tuple(&test_struct2::a, &test_struct2::b, &test_struct2::c));
}