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Improve diagnostics for structures with huge amount of fields

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This commit is contained in:
Antony Polukhin
2020-08-19 19:45:05 +03:00
parent 89b1d45ff7
commit 4205a2e553
2 changed files with 12 additions and 16 deletions
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22
misc/generate_cpp17.py
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@@ -64,22 +64,18 @@ constexpr auto tie_as_tuple(T& val, size_t_<1>, std::enable_if_t<!std::is_class<
############################################################################################################################
EPILOGUE = """
template <class T, std::size_t I>
constexpr void tie_as_tuple(T& val, size_t_<I>) noexcept {
static_assert(sizeof(T) && false,
"====================> Boost.PFR: Too many fields in a structure T. Regenerate include/boost/pfr/detail/core17_generated.hpp file for appropriate count of fields. For example: `python ./misc/generate_cpp17.py 300 > include/boost/pfr/detail/core17_generated.hpp`");
}
}}} // namespace boost::pfr::detail
#endif // BOOST_PFR_DETAIL_CORE17_GENERATED_HPP
"""
############################################################################################################################
generate_sfinae_attempts = False
if generate_sfinae_attempts:
print """
template <class T, std::size_t I>
constexpr auto tie_as_tuple(T& val, size_t_<I>) noexcept {
return tie_as_tuple(val, size_t_<I - 1>{});
}
"""
indexes = " a"
@@ -112,10 +108,4 @@ for i in xrange(1, funcs_count):
print "}\n"
if generate_sfinae_attempts:
print "template <class T>"
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