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 3EBC23858D35; Wed, 21 Feb 2024 09:36:25 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 3EBC23858D35 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 ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 3EBC23858D35 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=205.220.165.146 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1708508188; cv=none; b=ZfXcDAdO+7lNUbiILZ3pwOeyvWe0a9LZDaZL4gtX0vXYPiE/0NzGr7OhqHMJbvizEh78L1g99CHjvr9a0kPXumCv0Dc/yT1ETFTI6VGv9ua5CWgQNO2E6m7ckyX7NVN07Ty6FvWkZjXnlPHnmNWpQCjSI2b/U6ZhBY4viJSf1Q8= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1708508188; c=relaxed/simple; bh=1gH+O9a4vL4oY00vB4+DswXckPx945fkWnb8Q0PpiLY=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=og8Azr7dP8qyq4LHLO2NIU1zn9GEbuqo/DmV6oUhtu3b2ATR/x7RS3kCne5hAjQgu3rZ0KEKRk95N9W+p5Y5VWijCEnLrw89bqq/7/uEKF3IujrMkA8C5N4ierw43Z0QvEWjXjLIDkOOKmhHlYfKStFk+xc2Qu+UF6YGy6SVEYY= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from pps.filterd (m0247474.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 41L9ZKYa010942; Wed, 21 Feb 2024 09:36:24 GMT Received: from mxout21.s.uw.edu (mxout21.s.uw.edu [140.142.32.139]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3wd56mb6qy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 21 Feb 2024 09:36:23 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.132]) by mxout21.s.uw.edu (8.14.4+UW20.07/8.14.4+UW24.02) with ESMTP id 41L9aLlJ011356 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 21 Feb 2024 01:36:21 -0800 X-Auth-Received: from kmatsui-ThinkPad-X1-Carbon-Gen-9.dhcp4.washington.edu ([10.154.74.128]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW24.02) with ESMTPSA id 41L9aJVj002942 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 21 Feb 2024 01:36:21 -0800 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 v13 19/26] c++: Implement __decay built-in trait Date: Wed, 21 Feb 2024 01:36:09 -0800 Message-ID: <20240221093616.4001742-19-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240221093616.4001742-1-kmatsui@gcc.gnu.org> References: <20240221085142.3779280-26-kmatsui@gcc.gnu.org> <20240221093616.4001742-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: 9NLTESWCmvDt_3jTcHmkwMbECDHwu1NW X-Proofpoint-GUID: 9NLTESWCmvDt_3jTcHmkwMbECDHwu1NW X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-20_06,2024-02-20_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1034 lowpriorityscore=0 priorityscore=1501 phishscore=0 spamscore=0 mlxlogscore=526 impostorscore=0 malwarescore=0 adultscore=0 bulkscore=0 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402210074 X-Spam-Status: No, score=-12.7 required=5.0 tests=BAYES_00,GIT_PATCH_0,JMQ_SPF_NEUTRAL,KAM_DMARC_STATUS,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,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::decay. gcc/cp/ChangeLog: * cp-trait.def: Define __decay. * semantics.cc (finish_trait_type): Handle CPTK_DECAY. gcc/testsuite/ChangeLog: * g++.dg/ext/has-builtin-1.C: Test existence of __decay. * g++.dg/ext/decay.C: New test. Signed-off-by: Ken Matsui --- gcc/cp/cp-trait.def | 1 + gcc/cp/semantics.cc | 12 ++++++++ gcc/testsuite/g++.dg/ext/decay.C | 39 ++++++++++++++++++++++++ gcc/testsuite/g++.dg/ext/has-builtin-1.C | 3 ++ 4 files changed, 55 insertions(+) create mode 100644 gcc/testsuite/g++.dg/ext/decay.C diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def index 173818adf79..2d1cb7c227c 100644 --- a/gcc/cp/cp-trait.def +++ b/gcc/cp/cp-trait.def @@ -51,6 +51,7 @@ DEFTRAIT_TYPE (ADD_LVALUE_REFERENCE, "__add_lvalue_reference", 1) DEFTRAIT_TYPE (ADD_POINTER, "__add_pointer", 1) DEFTRAIT_TYPE (ADD_RVALUE_REFERENCE, "__add_rvalue_reference", 1) +DEFTRAIT_TYPE (DECAY, "__decay", 1) DEFTRAIT_EXPR (HAS_NOTHROW_ASSIGN, "__has_nothrow_assign", 1) DEFTRAIT_EXPR (HAS_NOTHROW_CONSTRUCTOR, "__has_nothrow_constructor", 1) DEFTRAIT_EXPR (HAS_NOTHROW_COPY, "__has_nothrow_copy", 1) diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc index 19d6f87a9ea..45dc509855a 100644 --- a/gcc/cp/semantics.cc +++ b/gcc/cp/semantics.cc @@ -12801,6 +12801,18 @@ finish_trait_type (cp_trait_kind kind, tree type1, tree type2, return type1; return cp_build_reference_type (type1, /*rval=*/true); + case CPTK_DECAY: + if (TYPE_REF_P (type1)) + type1 = TREE_TYPE (type1); + + if (TREE_CODE (type1) == ARRAY_TYPE) + return finish_trait_type (CPTK_ADD_POINTER, TREE_TYPE (type1), type2, + complain); + else if (TREE_CODE (type1) == FUNCTION_TYPE) + return finish_trait_type (CPTK_ADD_POINTER, type1, type2, complain); + else + return cv_unqualified (type1); + case CPTK_REMOVE_ALL_EXTENTS: return strip_array_types (type1); diff --git a/gcc/testsuite/g++.dg/ext/decay.C b/gcc/testsuite/g++.dg/ext/decay.C new file mode 100644 index 00000000000..cf224b7452c --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/decay.C @@ -0,0 +1,39 @@ +// { dg-do compile { target c++11 } } + +#define SA(X) static_assert((X),#X) + +// class ClassType { }; + +// Positive tests. +using test1_type = __decay(bool); +SA(__is_same(test1_type, bool)); + +// NB: DR 705. +using test2_type = __decay(const int); +SA(__is_same(test2_type, int)); + +using test3_type = __decay(int[4]); +SA(__is_same(test3_type, __remove_extent(int[4])*)); + +using fn_type = void (); +using test4_type = __decay(fn_type); +SA(__is_same(test4_type, __add_pointer(fn_type))); + +using cfn_type = void () const; +using test5_type = __decay(cfn_type); +SA(__is_same(test5_type, cfn_type)); + +// SA(__is_same(__add_rvalue_reference(int), int&&)); +// SA(__is_same(__add_rvalue_reference(int&&), int&&)); +// SA(__is_same(__add_rvalue_reference(int&), int&)); +// SA(__is_same(__add_rvalue_reference(const int), const int&&)); +// SA(__is_same(__add_rvalue_reference(int*), int*&&)); +// SA(__is_same(__add_rvalue_reference(ClassType&&), ClassType&&)); +// SA(__is_same(__add_rvalue_reference(ClassType), ClassType&&)); +// SA(__is_same(__add_rvalue_reference(int(int)), int(&&)(int))); +// SA(__is_same(__add_rvalue_reference(void), void)); +// SA(__is_same(__add_rvalue_reference(const void), const void)); +// SA(__is_same(__add_rvalue_reference(bool(int) const), bool(int) const)); +// SA(__is_same(__add_rvalue_reference(bool(int) &), bool(int) &)); +// SA(__is_same(__add_rvalue_reference(bool(int) const &&), bool(int) const &&)); +// SA(__is_same(__add_rvalue_reference(bool(int)), bool(&&)(int))); diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C b/gcc/testsuite/g++.dg/ext/has-builtin-1.C index c2503c5d82b..3aca273aad6 100644 --- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C +++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C @@ -11,6 +11,9 @@ #if !__has_builtin (__add_rvalue_reference) # error "__has_builtin (__add_rvalue_reference) failed" #endif +#if !__has_builtin (__decay) +# error "__has_builtin (__decay) failed" +#endif #if !__has_builtin (__builtin_addressof) # error "__has_builtin (__builtin_addressof) failed" #endif -- 2.43.2