06280a906c
This patch implements clang's __has_feature and __has_extension in GCC. Currently the patch aims to implement all documented features (and some undocumented ones) following the documentation at https://clang.llvm.org/docs/LanguageExtensions.html with the exception of the legacy features for C++ type traits. These are omitted, since as the clang documentation notes, __has_builtin is the correct "modern" way to query for these (which GCC already implements). gcc/c-family/ChangeLog: PR c++/60512 * c-common.cc (struct hf_feature_info): New. (c_common_register_feature): New. (init_has_feature): New. (has_feature_p): New. * c-common.h (c_common_has_feature): New. (c_family_register_lang_features): New. (c_common_register_feature): New. (has_feature_p): New. * c-lex.cc (init_c_lex): Plumb through has_feature callback. (c_common_has_builtin): Generalize and move common part ... (c_common_lex_availability_macro): ... here. (c_common_has_feature): New. * c-ppoutput.cc (init_pp_output): Plumb through has_feature. gcc/c/ChangeLog: PR c++/60512 * c-lang.cc (c_family_register_lang_features): New. * c-objc-common.cc (struct c_feature_info): New. (c_register_features): New. * c-objc-common.h (c_register_features): New. gcc/cp/ChangeLog: PR c++/60512 * cp-lang.cc (c_family_register_lang_features): New. * cp-objcp-common.cc (struct cp_feature_selector): New. (cp_feature_selector::has_feature): New. (struct cp_feature_info): New. (cp_register_features): New. * cp-objcp-common.h (cp_register_features): New. gcc/ChangeLog: PR c++/60512 * doc/cpp.texi: Document __has_{feature,extension}. gcc/objc/ChangeLog: PR c++/60512 * objc-act.cc (struct objc_feature_info): New. (objc_nonfragile_abi_p): New. (objc_common_register_features): New. * objc-act.h (objc_common_register_features): New. * objc-lang.cc (c_family_register_lang_features): New. gcc/objcp/ChangeLog: PR c++/60512 * objcp-lang.cc (c_family_register_lang_features): New. libcpp/ChangeLog: PR c++/60512 * include/cpplib.h (struct cpp_callbacks): Add has_feature. (enum cpp_builtin_type): Add BT_HAS_{FEATURE,EXTENSION}. * init.cc: Add __has_{feature,extension}. * macro.cc (_cpp_builtin_macro_text): Handle BT_HAS_{FEATURE,EXTENSION}. gcc/testsuite/ChangeLog: PR c++/60512 * c-c++-common/has-feature-common.c: New test. * c-c++-common/has-feature-pedantic.c: New test. * g++.dg/ext/has-feature.C: New test. * gcc.dg/asan/has-feature-asan.c: New test. * gcc.dg/has-feature.c: New test. * gcc.dg/ubsan/has-feature-ubsan.c: New test. * obj-c++.dg/has-feature.mm: New test. * objc.dg/has-feature.m: New test. Co-Authored-By: Iain Sandoe <iain@sandoe.co.uk> |
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| .. | ||
| cpplib.h | ||
| line-map.h | ||
| mkdeps.h | ||
| rich-location.h | ||
| symtab.h | ||