f0c5ce0800
Use header_information to generate the __std_clang_module header. Instead of using lit_header_restrictions like the manually written header did, make a new header_include_requirements to codify what can be included rather than what can be fully tested. Reviewed By: Mordante, #libc Differential Revision: https://reviews.llvm.org/D157364
83 lines
3.1 KiB
Python
83 lines
3.1 KiB
Python
# ===----------------------------------------------------------------------===##
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#
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#
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# ===----------------------------------------------------------------------===##
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import operator
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import os.path
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import libcxx.header_information
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public_headers = libcxx.header_information.public_headers
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header_include_requirements = libcxx.header_information.header_include_requirements
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always_available_headers = frozenset(public_headers).difference(
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*header_include_requirements.values()
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)
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libcxx_include_directory = os.path.join(
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os.path.dirname(os.path.dirname(os.path.realpath(__file__))), "include"
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)
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with open(
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os.path.join(libcxx_include_directory, "__std_clang_module"), "w"
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) as std_clang_module_header:
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std_clang_module_header.write(
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"""\
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// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// WARNING, this entire header is generated by
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// utils/generate_std_clang_module_header.py
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// DO NOT MODIFY!
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// This header should not be directly included, it's exclusively to import all
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// of the libc++ public clang modules for the `std` clang module to export. In
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// other words, it's to facilitate `@import std;` in Objective-C++ and `import std`
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// in Swift to expose all of the libc++ interfaces. This is generally not
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// recommended, however there are some clients that need to import all of libc++
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// without knowing what "all" is.
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#if !__building_module(std)
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# error "Do not include this header directly, include individual headers instead"
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#endif
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#include <__config>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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"""
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)
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# Include the angle brackets in sorting so that <a.h> sorts before <a>
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# like check-format wants.
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for include in sorted([f"<{header}>" for header in always_available_headers]):
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std_clang_module_header.write(f"#include {include}\n")
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for requirements, headers in sorted(
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header_include_requirements.items(), key=operator.itemgetter(0)
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):
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std_clang_module_header.write("\n")
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if len(requirements) == 1:
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std_clang_module_header.write("#ifndef ")
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std_clang_module_header.write(requirements[0])
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else:
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std_clang_module_header.write("#if")
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for index, requirement in enumerate(requirements):
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if index > 0:
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std_clang_module_header.write(" &&")
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std_clang_module_header.write(f" !defined({requirement})")
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std_clang_module_header.write("\n")
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for include in sorted([f"<{header}>" for header in headers]):
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std_clang_module_header.write(f"# include {include}\n")
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std_clang_module_header.write("#endif\n")
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