1# ===----------------------------------------------------------------------===## 2# 3# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4# See https://llvm.org/LICENSE.txt for license information. 5# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6# 7# ===----------------------------------------------------------------------===## 8 9import os.path 10import sys 11 12from libcxx.header_information import module_c_headers 13from libcxx.header_information import module_headers 14from libcxx.header_information import header_restrictions 15from libcxx.header_information import headers_not_available 16 17 18def write_file(module): 19 libcxx_module_directory = os.path.join( 20 os.path.dirname(os.path.dirname(os.path.realpath(__file__))), "modules" 21 ) 22 with open( 23 os.path.join(libcxx_module_directory, f"{module}.cppm.in"), "w" 24 ) as module_cpp_in: 25 module_cpp_in.write( 26 """\ 27// -*- C++ -*- 28//===----------------------------------------------------------------------===// 29// 30// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 31// See https://llvm.org/LICENSE.txt for license information. 32// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 33// 34//===----------------------------------------------------------------------===// 35 36// WARNING, this entire header is generated by 37// utils/generate_libcxx_cppm_in.py 38// DO NOT MODIFY! 39 40module; 41 42#include <__config> 43 44// The headers of Table 24: C++ library headers [tab:headers.cpp] 45// and the headers of Table 25: C++ headers for C library facilities [tab:headers.cpp.c] 46""" 47 ) 48 for header in module_headers if module == "std" else module_c_headers: 49 if header in header_restrictions: 50 module_cpp_in.write( 51 f"""\ 52#if {header_restrictions[header]} 53# include <{header}> 54#endif 55""" 56 ) 57 else: 58 module_cpp_in.write(f"#include <{header}>\n") 59 60 module_cpp_in.write( 61 """ 62// *** Headers not yet available *** 63// 64// This validation is mainly to catch when a new header is added but adding the 65// corresponding .inc file is forgotten. However, the check based on __has_include 66// alone doesn't work on Windows because the Windows SDK is on the include path, 67// and that means the MSVC STL headers can be found as well, tricking __has_include 68// into thinking that libc++ provides the header. 69// 70#ifndef _WIN32 71""" 72 ) 73 for header in sorted(headers_not_available): 74 module_cpp_in.write( 75 f"""\ 76# if __has_include(<{header}>) 77# error "please update the header information for <{header}> in headers_not_available in utils/libcxx/header_information.py" 78# endif // __has_include(<{header}>) 79""" 80 ) 81 82 module_cpp_in.write( 83 f"""#endif // _WIN32 84 85export module {module}; 86{'export import std;' if module == 'std.compat' else ''} 87 88{'@LIBCXX_MODULE_STD_INCLUDE_SOURCES@' if module == 'std' else ''} 89{'@LIBCXX_MODULE_STD_COMPAT_INCLUDE_SOURCES@' if module == 'std.compat' else ''}""" 90 ) 91 92 93if __name__ == "__main__": 94 if len(sys.argv) != 2 or (sys.argv[1] != "std" and sys.argv[1] != "std.compat"): 95 sys.stderr.write( 96 f"""\ 97Usage: 98{os.path.basename(__file__)} (std|std.compat) 99""" 100 ) 101 sys.exit(1) 102 103 write_file(sys.argv[1]) 104