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[2620:52:3:1:0:246e:9693:128c]) by mx.google.com with ESMTPS id qb37-20020a1709077ea500b00932e8fe9cdasi3445391ejc.223.2023.03.20.06.16.22 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Mar 2023 06:16:22 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) client-ip=2620:52:3:1:0:246e:9693:128c; Authentication-Results: mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=ULKFhnK1; spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gnu.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 60281385F01D for ; Mon, 20 Mar 2023 13:15:40 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 60281385F01D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1679318140; bh=cVx/DyU1pYZKCfxLt3H+hKx7gslAqMCJTcUrma7OW0s=; h=To:Cc:Subject:Date:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From:Reply-To:From; b=ULKFhnK15Q3iV2CCbO8jriNVcQ3RX0zAbhMCkWo+5NSsFfAAQkk9L8ARZr25fIIIZ Zi0dYpYtaUCaPxltZWw/GTBPUBM+qJLT9sjexLAzT01ur2vknYl3oXRG8kRg+wpwLq 0F3/C7L7ZJ7Zw+B7JdlbVw0/3UBmudbxNy30A90Q= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mx0b-00641c01.pphosted.com (mx0b-00641c01.pphosted.com [205.220.177.146]) by sourceware.org (Postfix) with ESMTPS id 252453858D33; Mon, 20 Mar 2023 13:14:54 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 252453858D33 Received: from pps.filterd (m0247479.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 32KD3S2W005187; Mon, 20 Mar 2023 13:14:52 GMT Received: from mxout23.cac.washington.edu (mxout23.cac.washington.edu [140.142.32.140]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3pdpwqp71f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Mar 2023 13:14:52 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.132]) by mxout23.cac.washington.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 32KDEoq6011920 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 20 Mar 2023 06:14:50 -0700 X-Auth-Received: from localhost.localdomain ([10.154.74.245]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 32KDEoGM018599 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Mon, 20 Mar 2023 06:14:50 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, ppalka@redhat.com, Ken Matsui Subject: [PATCH 1/2] c++: implement __is_reference built-in trait Date: Mon, 20 Mar 2023 06:14:43 -0700 Message-Id: <20230320131444.7505-1-kmatsui@cs.washington.edu> X-Mailer: git-send-email 2.40.0 MIME-Version: 1.0 X-Proofpoint-GUID: YnwpMUlQO1_9EkYUF5tIACI8897ZsjJv X-Proofpoint-ORIG-GUID: YnwpMUlQO1_9EkYUF5tIACI8897ZsjJv X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-20_08,2023-03-20_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 malwarescore=0 mlxscore=0 bulkscore=0 mlxlogscore=770 lowpriorityscore=0 priorityscore=1501 suspectscore=0 spamscore=0 adultscore=0 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303150002 definitions=main-2303200112 X-Spam-Status: No, score=-14.5 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Ken Matsui via Gcc-patches From: Ken Matsui Reply-To: Ken Matsui Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1760892742835296959?= X-GMAIL-MSGID: =?utf-8?q?1760892742835296959?= This patch implements built-in trait for std::is_reference. gcc/cp/ChangeLog: * cp-trait.def: Define __is_reference. * constraint.cc (diagnose_trait_expr): Handle CPTK_IS_REFERENCE. * semantics.cc (trait_expr_value): Likewise. (finish_trait_expr): Likewise. gcc/testsuite/ChangeLog: * g++.dg/ext/has-builtin-1.C: Test existence of __is_reference. * g++.dg/ext/is_reference.C: New test. --- 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_reference.C | 26 ++++++++++++++++++++++++ 5 files changed, 37 insertions(+) create mode 100644 gcc/testsuite/g++.dg/ext/is_reference.C diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc index 273d15ab097..23e5bc24dbb 100644 --- a/gcc/cp/constraint.cc +++ b/gcc/cp/constraint.cc @@ -3701,6 +3701,9 @@ diagnose_trait_expr (tree expr, tree args) case CPTK_HAS_VIRTUAL_DESTRUCTOR: inform (loc, " %qT does not have a virtual destructor", t1); break; + case CPTK_IS_REFERENCE: + inform (loc, " %qT is not a reference", t1); + break; case CPTK_IS_ABSTRACT: inform (loc, " %qT is not an abstract class", t1); break; diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def index bac593c0094..63a64152ce6 100644 --- a/gcc/cp/cp-trait.def +++ b/gcc/cp/cp-trait.def @@ -67,6 +67,7 @@ DEFTRAIT_EXPR (IS_CONVERTIBLE, "__is_convertible", 2) DEFTRAIT_EXPR (IS_EMPTY, "__is_empty", 1) DEFTRAIT_EXPR (IS_ENUM, "__is_enum", 1) DEFTRAIT_EXPR (IS_FINAL, "__is_final", 1) +DEFTRAIT_EXPR (IS_REFERENCE, "__is_reference", 1) DEFTRAIT_EXPR (IS_LAYOUT_COMPATIBLE, "__is_layout_compatible", 2) DEFTRAIT_EXPR (IS_LITERAL_TYPE, "__is_literal_type", 1) DEFTRAIT_EXPR (IS_NOTHROW_ASSIGNABLE, "__is_nothrow_assignable", 2) diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc index 87c2e8a7111..dce98af4f72 100644 --- a/gcc/cp/semantics.cc +++ b/gcc/cp/semantics.cc @@ -11995,6 +11995,9 @@ trait_expr_value (cp_trait_kind kind, tree type1, tree type2) case CPTK_IS_FINAL: return CLASS_TYPE_P (type1) && CLASSTYPE_FINAL (type1); + case CPTK_IS_REFERENCE: + return type_code1 == REFERENCE_TYPE; + case CPTK_IS_LAYOUT_COMPATIBLE: return layout_compatible_type_p (type1, type2); @@ -12139,6 +12142,7 @@ finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2) case CPTK_HAS_TRIVIAL_COPY: case CPTK_HAS_TRIVIAL_DESTRUCTOR: case CPTK_HAS_UNIQUE_OBJ_REPRESENTATIONS: + case CPTK_IS_REFERENCE: if (!check_trait_type (type1)) return error_mark_node; break; diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C b/gcc/testsuite/g++.dg/ext/has-builtin-1.C index f343e153e56..b697673790c 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_reference) +# error "__has_builtin (__is_reference) failed" +#endif diff --git a/gcc/testsuite/g++.dg/ext/is_reference.C b/gcc/testsuite/g++.dg/ext/is_reference.C new file mode 100644 index 00000000000..b4f048538e5 --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/is_reference.C @@ -0,0 +1,26 @@ +// { dg-do compile { target c++11 } } + +#define SA(X) static_assert((X),#X) + +SA(!__is_reference(void)); +SA(!__is_reference(int*)); + +SA(__is_reference(int&)); +SA(__is_reference(const int&)); +SA(__is_reference(volatile int&)); +SA(__is_reference(const volatile int&)); + +SA(__is_reference(int&&)); +SA(__is_reference(const int&&)); +SA(__is_reference(volatile int&&)); +SA(__is_reference(const volatile int&&)); + +SA(!__is_reference(int[3])); +SA(!__is_reference(const int[3])); +SA(!__is_reference(volatile int[3])); +SA(!__is_reference(const volatile int[3])); + +SA(!__is_reference(int(int))); +SA(!__is_reference(int(*const)(int))); +SA(!__is_reference(int(*volatile)(int))); +SA(!__is_reference(int(*const volatile)(int)));