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make streams and exceptions optional (#218)

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* magic_enum: make streams optional
this commit adds support to disable streams
with macro MAGIC_ENUM_NO_STREAMS

* magic_enum_format: add support to disable exceptions
this commit adds support to disable exceptions
with macro MAGIC_ENUM_NO_EXCEPTIONS
This commit is contained in:
ilobilo 2022-11-04 23:46:37 +04:00 • committed by GitHub
parent 159a35006d
commit 596f00c0db
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 15 additions and 3 deletions
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8
include/magic_enum.hpp
View file

@ -40,7 +40,6 @@
#include <cassert>
#include <cstdint>
#include <cstddef>
#include <iosfwd>
#include <limits>
#include <type_traits>
#include <utility>
@ -59,6 +58,9 @@
#if !defined(MAGIC_ENUM_USING_ALIAS_STRING_VIEW)
#include <string_view>
#endif
#if !defined(MAGIC_ENUM_NO_STREAMS)
#include <iosfwd>
#endif
#if defined(__clang__)
# pragma clang diagnostic push
@ -1381,6 +1383,8 @@ constexpr auto enum_for_each(Lambda&& lambda) {
}
}
#if !defined(MAGIC_ENUM_NO_STREAMS)
namespace ostream_operators {
template <typename Char, typename Traits, typename E, detail::enable_if_t<E, int> = 0>
@ -1431,6 +1435,8 @@ using namespace istream_operators;
} // namespace magic_enum::iostream_operators
#endif
namespace bitwise_operators {
template <typename E, detail::enable_if_t<E, int> = 0>

8
include/magic_enum_format.hpp
View file

@ -43,6 +43,12 @@
# define MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT_AUTO_DEFINE
#endif // MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT
#if !defined(MAGIC_ENUM_NO_EXCEPTIONS) && (defined(__cpp_exceptions) || defined(_EXCEPTIONS) || defined(_HAS_EXCEPTIONS))
# define MAGIC_ENUM_THROW throw std::format_error
#else
# define MAGIC_ENUM_THROW std::terminate(); (void)
#endif
namespace magic_enum::customize {
// customize enum to enable/disable automatic std::format
template <typename E>
@ -67,7 +73,7 @@ struct std::formatter<E, std::enable_if_t<std::is_enum_v<E> && magic_enum::custo
}
}
constexpr auto type_name = magic_enum::enum_type_name<E>();
throw std::format_error("Type of " + std::string{type_name.data(), type_name.size()} + " enum value: " + std::to_string(magic_enum::enum_integer<D>(e)) + " is not exists.");
MAGIC_ENUM_THROW("Type of " + std::string{type_name.data(), type_name.size()} + " enum value: " + std::to_string(magic_enum::enum_integer<D>(e)) + " is not exists.");
}
};