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# ===----------------------------------------------------------------------===##
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
# ===----------------------------------------------------------------------===##
import os.path
import sys
from libcxx.header_information import module_c_headers
from libcxx.header_information import module_headers
from libcxx.header_information import header_restrictions
from libcxx.header_information import headers_not_available
def write_file(module):
libcxx_module_directory = os.path.join(
os.path.dirname(os.path.dirname(os.path.realpath(__file__))), "modules"
)
with open(
os.path.join(libcxx_module_directory, f"{module}.cppm.in"), "w"
) as module_cpp_in:
module_cpp_in.write(
"""\
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// WARNING, this entire header is generated by
// utils/generate_libcxx_cppm_in.py
// DO NOT MODIFY!
module;
#include <__config>
// The headers of Table 24: C++ library headers [tab:headers.cpp]
// and the headers of Table 25: C++ headers for C library facilities [tab:headers.cpp.c]
"""
)
for header in module_headers if module == "std" else module_c_headers:
if header in header_restrictions:
module_cpp_in.write(
f"""\
#if {header_restrictions[header]}
# include <{header}>
#endif
"""
)
else:
module_cpp_in.write(f"#include <{header}>\n")
module_cpp_in.write(
"""
// *** Headers not yet available ***
//
// This validation is mainly to catch when a new header is added but adding the
// corresponding .inc file is forgotten. However, the check based on __has_include
// alone doesn't work on Windows because the Windows SDK is on the include path,
// and that means the MSVC STL headers can be found as well, tricking __has_include
// into thinking that libc++ provides the header.
//
#ifndef _WIN32
"""
)
for header in sorted(headers_not_available):
module_cpp_in.write(
f"""\
# if __has_include(<{header}>)
# error "please update the header information for <{header}> in headers_not_available in utils/libcxx/header_information.py"
# endif // __has_include(<{header}>)
"""
)
module_cpp_in.write(
f"""#endif // _WIN32
export module {module};
{'export import std;' if module == 'std.compat' else ''}
{'@LIBCXX_MODULE_STD_INCLUDE_SOURCES@' if module == 'std' else ''}
{'@LIBCXX_MODULE_STD_COMPAT_INCLUDE_SOURCES@' if module == 'std.compat' else ''}"""
)
if __name__ == "__main__":
if len(sys.argv) != 2 or (sys.argv[1] != "std" and sys.argv[1] != "std.compat"):
sys.stderr.write(
f"""\
Usage:
{os.path.basename(__file__)} (std|std.compat)
"""
)
sys.exit(1)
write_file(sys.argv[1])
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