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add const

main
Brett 2025-04-26 22:38:17 -04:00
parent c04383b471
commit 949b2841f4
2 changed files with 13 additions and 9 deletions
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2
CMakeLists.txt
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@ -1,6 +1,6 @@
cmake_minimum_required(VERSION 3.20) cmake_minimum_required(VERSION 3.20)
include(cmake/color.cmake) include(cmake/color.cmake)
set(BLT_VERSION 5.4.14) set(BLT_VERSION 5.4.15)
set(BLT_TARGET BLT) set(BLT_TARGET BLT)

18
include/blt/std/variant.h
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@ -199,13 +199,6 @@ namespace blt
return m_variant.valueless_by_exception(); return m_variant.valueless_by_exception();
} }
template <typename T, std::enable_if_t<std::conjunction_v<std::is_invocable<decltype(&T::operator()), T, Types>...> || std::conjunction_v<
std::is_invocable<decltype(&T::operator()), Types>...>, bool> = true>
constexpr auto visit(T&& visitor) -> decltype(auto)
{
return std::visit(std::forward<T>(visitor), m_variant);
}
template <typename... Visitee> template <typename... Visitee>
static constexpr auto make_visitor(Visitee&&... visitees) static constexpr auto make_visitor(Visitee&&... visitees)
{ {
@ -269,6 +262,16 @@ namespace blt
return std::visit(make_visitor(std::forward<Visitee>(visitees)...), m_variant); return std::visit(make_visitor(std::forward<Visitee>(visitees)...), m_variant);
} }
/**
* Automatic visitor generation
* @param visitees user lambdas
*/
template <typename... Visitee>
constexpr auto visit(Visitee&&... visitees) const -> decltype(auto)
{
return std::visit(make_visitor(std::forward<Visitee>(visitees)...), m_variant);
}
template <typename Default, typename... Visitee> template <typename Default, typename... Visitee>
constexpr auto visit_value(Default&& default_value, Visitee&&... visitees) -> decltype(auto) constexpr auto visit_value(Default&& default_value, Visitee&&... visitees) -> decltype(auto)
{ {
@ -420,6 +423,7 @@ namespace blt
} }
private: private:
value_type m_variant; value_type m_variant;
}; };