mirror of
https://github.com/boostorg/pfr.git
synced 2026-01-19 04:22:13 +00:00
112 lines
4.3 KiB
Python
112 lines
4.3 KiB
Python
#!/usr/bin/python
|
|
|
|
# Copyright (c) 2016-2020 Antony Polukhin
|
|
#
|
|
# Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
############################################################################################################################
|
|
|
|
import sys
|
|
import string
|
|
|
|
# Skipping some letters that may produce keywords or are hard to read, or shadow template parameters
|
|
ascii_letters = string.ascii_letters.replace("o", "").replace("O", "").replace("i", "").replace("I", "").replace("T", "")
|
|
|
|
PROLOGUE = """// Copyright (c) 2016-2020 Antony Polukhin
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
//////////////// THIS HEADER IS AUTO GENERATED BY misc/generate_cpp17.py ////////////////
|
|
//////////////// MODIFY AND RUN THE misc/generate_cpp17.py INSTEAD OF DIRECTLY MODIFYING THE GENERATED FILE ////////////////
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef BOOST_PFR_DETAIL_CORE17_GENERATED_HPP
|
|
#define BOOST_PFR_DETAIL_CORE17_GENERATED_HPP
|
|
#pragma once
|
|
|
|
#include <boost/pfr/detail/config.hpp>
|
|
#if !BOOST_PFR_USE_CPP17
|
|
# error C++17 is required for this header.
|
|
#endif
|
|
|
|
#include <boost/pfr/detail/sequence_tuple.hpp>
|
|
#include <boost/pfr/detail/size_t_.hpp>
|
|
|
|
namespace boost { namespace pfr { namespace detail {
|
|
|
|
template <class... Args>
|
|
constexpr auto make_tuple_of_references(Args&&... args) noexcept {
|
|
return sequence_tuple::tuple<Args&...>{ args... };
|
|
}
|
|
|
|
template <class T>
|
|
constexpr auto tie_as_tuple(T& /*val*/, size_t_<0>) noexcept {
|
|
return sequence_tuple::tuple<>{};
|
|
}
|
|
|
|
template <class T>
|
|
constexpr auto tie_as_tuple(T& val, size_t_<1>, std::enable_if_t<std::is_class< std::remove_cv_t<T> >::value>* = 0) noexcept {
|
|
auto& [a] = val; // ====================> Boost.PFR: User-provided type is not a SimpleAggregate.
|
|
return ::boost::pfr::detail::make_tuple_of_references(a);
|
|
}
|
|
|
|
|
|
template <class T>
|
|
constexpr auto tie_as_tuple(T& val, size_t_<1>, std::enable_if_t<!std::is_class< std::remove_cv_t<T> >::value>* = 0) noexcept {
|
|
return ::boost::pfr::detail::make_tuple_of_references( val );
|
|
}
|
|
|
|
"""
|
|
|
|
############################################################################################################################
|
|
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
|
|
"""
|
|
|
|
############################################################################################################################
|
|
|
|
|
|
indexes = " a"
|
|
print(PROLOGUE)
|
|
funcs_count = 100 if len(sys.argv) == 1 else int(sys.argv[1])
|
|
max_args_on_a_line = len(ascii_letters)
|
|
for i in range(1, funcs_count):
|
|
if i % max_args_on_a_line == 0:
|
|
indexes += ",\n "
|
|
else:
|
|
indexes += ","
|
|
|
|
if i >= max_args_on_a_line:
|
|
indexes += ascii_letters[i // max_args_on_a_line - 1]
|
|
indexes += ascii_letters[i % max_args_on_a_line]
|
|
|
|
print("template <class T>")
|
|
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() + "] = val; // ====================> Boost.PFR: User-provided type is not a SimpleAggregate.")
|
|
print(" return ::boost::pfr::detail::make_tuple_of_references(" + indexes.strip() + ");")
|
|
else:
|
|
print(" auto& [")
|
|
print(indexes)
|
|
print(" ] = val; // ====================> Boost.PFR: User-provided type is not a SimpleAggregate.")
|
|
print("")
|
|
print(" return ::boost::pfr::detail::make_tuple_of_references(")
|
|
print(indexes)
|
|
print(" );")
|
|
|
|
print("}\n")
|
|
|
|
print(EPILOGUE)
|