From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-00641c01.pphosted.com (mx0a-00641c01.pphosted.com [205.220.165.146]) by sourceware.org (Postfix) with ESMTPS id 5EB3A3858D37; Sat, 8 Jul 2023 05:26:50 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 5EB3A3858D37 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=gcc.gnu.org Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=gcc.gnu.org Received: from pps.filterd (m0247471.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3685HwIZ009567; Sat, 8 Jul 2023 05:26:49 GMT Received: from mxout21.s.uw.edu (mxout21.s.uw.edu [140.142.32.139]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3rq0r5r4dc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 08 Jul 2023 05:26:49 +0000 Received: from smtp.washington.edu (smtp.washington.edu [140.142.234.157]) by mxout21.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 3685QRVs007002 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 7 Jul 2023 22:26:27 -0700 X-Auth-Received: from localhost.localdomain ([10.154.74.234]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 3685QRb9030806 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 7 Jul 2023 22:26:27 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu From: Ken Matsui To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Ken Matsui Subject: [PATCH v3 1/2] c++: implement __is_const built-in trait Date: Fri, 7 Jul 2023 22:26:24 -0700 Message-ID: <20230708052625.66538-1-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: qIu3vm05D9ePhaNpyZm3f743N3WV5mOT X-Proofpoint-GUID: qIu3vm05D9ePhaNpyZm3f743N3WV5mOT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-08_02,2023-07-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 clxscore=1034 lowpriorityscore=0 adultscore=0 phishscore=0 bulkscore=0 impostorscore=0 mlxscore=0 mlxlogscore=923 priorityscore=1501 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307080047 X-Spam-Status: No, score=-13.3 required=5.0 tests=BAYES_00,GIT_PATCH_0,JMQ_SPF_NEUTRAL,KAM_DMARC_STATUS,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NEUTRAL,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: This patch implements built-in trait for std::is_const. gcc/cp/ChangeLog: * cp-trait.def: Define __is_const. * constraint.cc (diagnose_trait_expr): Handle CPTK_IS_CONST. * semantics.cc (trait_expr_value): Likewise. (finish_trait_expr): Likewise. gcc/testsuite/ChangeLog: * g++.dg/ext/has-builtin-1.C: Test existence of __is_const. * g++.dg/ext/is_const.C: New test. Signed-off-by: Ken Matsui --- gcc/cp/constraint.cc | 3 +++ gcc/cp/cp-trait.def | 1 + gcc/cp/semantics.cc | 4 ++++ gcc/testsuite/g++.dg/ext/has-builtin-1.C | 3 +++ gcc/testsuite/g++.dg/ext/is_const.C | 19 +++++++++++++++++++ 5 files changed, 30 insertions(+) create mode 100644 gcc/testsuite/g++.dg/ext/is_const.C diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc index 8cf0f2d0974..ff4ae831def 100644 --- a/gcc/cp/constraint.cc +++ b/gcc/cp/constraint.cc @@ -3751,6 +3751,9 @@ diagnose_trait_expr (tree expr, tree args) case CPTK_IS_UNION: inform (loc, " %qT is not a union", t1); break; + case CPTK_IS_CONST: + inform (loc, " %qT is not a const type", t1); + break; case CPTK_IS_AGGREGATE: inform (loc, " %qT is not an aggregate", t1); break; diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def index 8b7fece0cc8..b40b475b86d 100644 --- a/gcc/cp/cp-trait.def +++ b/gcc/cp/cp-trait.def @@ -82,6 +82,7 @@ DEFTRAIT_EXPR (IS_TRIVIALLY_ASSIGNABLE, "__is_trivially_assignable", 2) DEFTRAIT_EXPR (IS_TRIVIALLY_CONSTRUCTIBLE, "__is_trivially_constructible", -1) DEFTRAIT_EXPR (IS_TRIVIALLY_COPYABLE, "__is_trivially_copyable", 1) DEFTRAIT_EXPR (IS_UNION, "__is_union", 1) +DEFTRAIT_EXPR (IS_CONST, "__is_const", 1) DEFTRAIT_EXPR (REF_CONSTRUCTS_FROM_TEMPORARY, "__reference_constructs_from_temporary", 2) DEFTRAIT_EXPR (REF_CONVERTS_FROM_TEMPORARY, "__reference_converts_from_temporary", 2) /* FIXME Added space to avoid direct usage in GCC 13. */ diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc index 8fb47fd179e..011ba8e46e1 100644 --- a/gcc/cp/semantics.cc +++ b/gcc/cp/semantics.cc @@ -12079,6 +12079,9 @@ trait_expr_value (cp_trait_kind kind, tree type1, tree type2) case CPTK_IS_ENUM: return type_code1 == ENUMERAL_TYPE; + case CPTK_IS_CONST: + return CP_TYPE_CONST_P (type1); + case CPTK_IS_FINAL: return CLASS_TYPE_P (type1) && CLASSTYPE_FINAL (type1); @@ -12296,6 +12299,7 @@ finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2) case CPTK_IS_ENUM: case CPTK_IS_UNION: case CPTK_IS_SAME: + case CPTK_IS_CONST: break; case CPTK_IS_LAYOUT_COMPATIBLE: diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C b/gcc/testsuite/g++.dg/ext/has-builtin-1.C index f343e153e56..965309a333a 100644 --- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C +++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C @@ -146,3 +146,6 @@ #if !__has_builtin (__remove_cvref) # error "__has_builtin (__remove_cvref) failed" #endif +#if !__has_builtin (__is_const) +# error "__has_builtin (__is_const) failed" +#endif diff --git a/gcc/testsuite/g++.dg/ext/is_const.C b/gcc/testsuite/g++.dg/ext/is_const.C new file mode 100644 index 00000000000..8f2d7c2fce9 --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/is_const.C @@ -0,0 +1,19 @@ +// { dg-do compile { target c++11 } } + +#include + +using namespace __gnu_test; + +#define SA(X) static_assert((X),#X) + +// Positive tests. +SA(__is_const(const int)); +SA(__is_const(const volatile int)); +SA(__is_const(cClassType)); +SA(__is_const(cvClassType)); + +// Negative tests. +SA(!__is_const(int)); +SA(!__is_const(volatile int)); +SA(!__is_const(ClassType)); +SA(!__is_const(vClassType)); -- 2.41.0