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Simplifications and more work for core14 loophole

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This commit is contained in:
Antony Polukhin
2017-09-06 21:51:43 +03:00
parent 7b0939289f
commit a6d655e064
4 changed files with 27 additions and 25 deletions
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28
misc/generate_cpp17.py
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@@ -44,19 +44,19 @@ constexpr auto make_tuple_of_references(Args&&... args) noexcept {
}
template <class T>
constexpr auto as_tuple_impl(T&& /*val*/, size_t_<0>) noexcept {
constexpr auto tie_as_tuple(T&& /*val*/, size_t_<0>) noexcept {
return sequence_tuple::tuple<>{};
}
template <class T>
constexpr auto as_tuple_impl(T&& val, size_t_<1>, std::enable_if_t<std::is_class< std::remove_cv_t<std::remove_reference_t<T>> >::value>* = 0) noexcept {
constexpr auto tie_as_tuple(T&& val, size_t_<1>, std::enable_if_t<std::is_class< std::remove_cv_t<std::remove_reference_t<T>> >::value>* = 0) noexcept {
auto& [a] = std::forward<T>(val);
return ::boost::pfr::detail::make_tuple_of_references(a);
}
template <class T>
constexpr auto as_tuple_impl(T&& val, size_t_<1>, std::enable_if_t<!std::is_class< std::remove_cv_t<std::remove_reference_t<T>> >::value>* = 0) noexcept {
constexpr auto tie_as_tuple(T&& val, size_t_<1>, std::enable_if_t<!std::is_class< std::remove_cv_t<std::remove_reference_t<T>> >::value>* = 0) noexcept {
return ::boost::pfr::detail::make_tuple_of_references( std::forward<T>(val) );
}
@@ -67,19 +67,19 @@ EPILOGUE = """
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
template <class T>
constexpr auto as_tuple(const T& val) noexcept {
constexpr auto tie_as_tuple(const T& val) noexcept {
typedef size_t_<fields_count<T>()> fields_count_tag;
return boost::pfr::detail::as_tuple_impl(val, fields_count_tag{});
return boost::pfr::detail::tie_as_tuple(val, fields_count_tag{});
}
template <class T>
constexpr auto as_tuple(T& val) noexcept {
constexpr auto tie_as_tuple(T& val) noexcept {
typedef size_t_<fields_count<T>()> fields_count_tag;
return boost::pfr::detail::as_tuple_impl(val, fields_count_tag{});
return boost::pfr::detail::tie_as_tuple(val, fields_count_tag{});
}
template <class T>
using as_tuple_t = decltype( ::boost::pfr::detail::as_tuple(std::declval<T&>()) );
using tie_as_tuple_t = decltype( ::boost::pfr::detail::tie_as_tuple(std::declval<T&>()) );
}}} // namespace boost::pfr::detail
@@ -93,8 +93,8 @@ generate_sfinae_attempts = False
if generate_sfinae_attempts:
print """
template <class T, std::size_t I>
constexpr auto as_tuple_impl(T&& val, size_t_<I>) noexcept {
return as_tuple_impl( std::forward<T>(val), size_t_<I - 1>{});
constexpr auto tie_as_tuple(T&& val, size_t_<I>) noexcept {
return tie_as_tuple( std::forward<T>(val), size_t_<I - 1>{});
}
"""
@@ -114,7 +114,7 @@ for i in xrange(1, funcs_count):
indexes += ascii_letters[i % max_args_on_a_line]
print "template <class T>"
print "constexpr auto as_tuple_impl(T&& val, size_t_<" + str(i + 1) + ">) noexcept {"
print "constexpr auto tie_as_tuple(T&& val, size_t_<" + str(i + 1) + ">) noexcept {"
if i < max_args_on_a_line:
print " auto& [" + indexes.strip() + "] = std::forward<T>(val);"
print " return ::boost::pfr::detail::make_tuple_of_references(" + indexes.strip() + ");"
@@ -131,8 +131,8 @@ for i in xrange(1, funcs_count):
if generate_sfinae_attempts:
print "template <class T>"
print "constexpr auto as_tuple_impl(T&& val, size_t_<" + str(i + 1) + "> v) noexcept"
print " ->decltype( ::boost::pfr::detail::as_tuple_impl0(std::forward<T>(val), v) )"
print "{ return ::boost::pfr::detail::as_tuple_impl0(std::forward<T>(val), v); }\n"
print "constexpr auto tie_as_tuple(T&& val, size_t_<" + str(i + 1) + "> v) noexcept"
print " ->decltype( ::boost::pfr::detail::tie_as_tuple0(std::forward<T>(val), v) )"
print "{ return ::boost::pfr::detail::tie_as_tuple0(std::forward<T>(val), v); }\n"
print EPILOGUE