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Fri, 20 Oct 2023 14:12:08 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.54]) by mxout25.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39KE8Bgo005582 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 20 Oct 2023 07:08:11 -0700 X-Auth-Received: from kmatsui-ThinkPad-X1-Carbon-Gen-9.dhcp4.washington.edu ([10.19.18.191]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 39KDvqKk011267 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 20 Oct 2023 07:08:11 -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 v23 32/33] c++: Implement __is_invocable built-in trait Date: Fri, 20 Oct 2023 06:53:51 -0700 Message-ID: <20231020135748.1846670-33-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231020135748.1846670-1-kmatsui@gcc.gnu.org> References: <20231017113822.677344-1-kmatsui@gcc.gnu.org> <20231020135748.1846670-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 X-Proofpoint-GUID: EASLFZ4wDBqkPoupDRWPe4FhJwZF5qxl X-Proofpoint-ORIG-GUID: EASLFZ4wDBqkPoupDRWPe4FhJwZF5qxl X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-20_10,2023-10-19_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxscore=0 adultscore=0 clxscore=1034 suspectscore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 mlxlogscore=999 priorityscore=1501 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310170001 definitions=main-2310200117 X-Spam-Status: No, score=-13.2 required=5.0 tests=BAYES_00, GIT_PATCH_0, JMQ_SPF_NEUTRAL, KAM_DMARC_STATUS, KAM_SHORT, RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_NEUTRAL, 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: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1780284623556278591 X-GMAIL-MSGID: 1780284623556278591 This patch implements built-in trait for std::is_invocable. gcc/cp/ChangeLog: * cp-trait.def: Define __is_invocable. * constraint.cc (diagnose_trait_expr): Handle CPTK_IS_INVOCABLE. * semantics.cc (trait_expr_value): Likewise. (finish_trait_expr): Likewise. (is_invocable_p): New function. * method.h: New file to export build_trait_object in method.cc. gcc/testsuite/ChangeLog: * g++.dg/ext/has-builtin-1.C: Test existence of __is_invocable. * g++.dg/ext/is_invocable1.C: New test. * g++.dg/ext/is_invocable2.C: New test. * g++.dg/ext/is_invocable3.C: New test. * g++.dg/ext/is_invocable4.C: New test. Signed-off-by: Ken Matsui --- gcc/cp/constraint.cc | 6 + gcc/cp/cp-trait.def | 1 + gcc/cp/method.h | 28 ++ gcc/cp/semantics.cc | 135 +++++++++ gcc/testsuite/g++.dg/ext/has-builtin-1.C | 3 + gcc/testsuite/g++.dg/ext/is_invocable1.C | 337 +++++++++++++++++++++++ gcc/testsuite/g++.dg/ext/is_invocable2.C | 139 ++++++++++ gcc/testsuite/g++.dg/ext/is_invocable3.C | 51 ++++ gcc/testsuite/g++.dg/ext/is_invocable4.C | 33 +++ 9 files changed, 733 insertions(+) create mode 100644 gcc/cp/method.h create mode 100644 gcc/testsuite/g++.dg/ext/is_invocable1.C create mode 100644 gcc/testsuite/g++.dg/ext/is_invocable2.C create mode 100644 gcc/testsuite/g++.dg/ext/is_invocable3.C create mode 100644 gcc/testsuite/g++.dg/ext/is_invocable4.C diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc index 9fce36e12d1..29bf548d30a 100644 --- a/gcc/cp/constraint.cc +++ b/gcc/cp/constraint.cc @@ -3754,6 +3754,12 @@ diagnose_trait_expr (tree expr, tree args) case CPTK_IS_FUNCTION: inform (loc, " %qT is not a function", t1); break; + case CPTK_IS_INVOCABLE: + if (!t2) + inform (loc, " %qT is not invocable", t1); + else + inform (loc, " %qT is not invocable by %qE", t1, t2); + break; case CPTK_IS_LAYOUT_COMPATIBLE: inform (loc, " %qT is not layout compatible with %qT", t1, t2); break; diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def index 05514a51c21..b8b7608c122 100644 --- a/gcc/cp/cp-trait.def +++ b/gcc/cp/cp-trait.def @@ -71,6 +71,7 @@ DEFTRAIT_EXPR (IS_EMPTY, "__is_empty", 1) DEFTRAIT_EXPR (IS_ENUM, "__is_enum", 1) DEFTRAIT_EXPR (IS_FINAL, "__is_final", 1) DEFTRAIT_EXPR (IS_FUNCTION, "__is_function", 1) +DEFTRAIT_EXPR (IS_INVOCABLE, "__is_invocable", -1) DEFTRAIT_EXPR (IS_LAYOUT_COMPATIBLE, "__is_layout_compatible", 2) DEFTRAIT_EXPR (IS_LITERAL_TYPE, "__is_literal_type", 1) DEFTRAIT_EXPR (IS_MEMBER_FUNCTION_POINTER, "__is_member_function_pointer", 1) diff --git a/gcc/cp/method.h b/gcc/cp/method.h new file mode 100644 index 00000000000..1aec8ec5cfd --- /dev/null +++ b/gcc/cp/method.h @@ -0,0 +1,28 @@ +/* Functions exported by method.cc. + Copyright (C) 2023 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +. */ + +#ifndef GCC_CP_METHOD_H +#define GCC_CP_METHOD_H 1 + +#include "tree.h" + +/* In method.cc */ +extern tree build_trait_object (tree type); + +#endif /* GCC_CP_METHOD_H */ diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc index 7cccbae5287..cc2e400531a 100644 --- a/gcc/cp/semantics.cc +++ b/gcc/cp/semantics.cc @@ -45,6 +45,10 @@ along with GCC; see the file COPYING3. If not see #include "gomp-constants.h" #include "predict.h" #include "memmodel.h" +#include "method.h" + +#include "print-tree.h" +#include "tree-pretty-print.h" /* There routines provide a modular interface to perform many parsing operations. They may therefore be used during actual parsing, or @@ -11714,6 +11718,133 @@ classtype_has_nothrow_assign_or_copy_p (tree type, bool assign_p) return saw_copy; } +/* Return true if FN_TYPE is invocable with the given ARG_TYPES. */ + +static bool +is_invocable_p (tree fn_type, tree arg_types) +{ + /* ARG_TYPES must be a TREE_VEC. */ + gcc_assert (TREE_CODE (arg_types) == TREE_VEC); + + /* Access check is required to determine if the given is invocable. */ + deferring_access_check_sentinel acs (dk_no_deferred); + + /* std::is_invocable is an unevaluated context. */ + cp_unevaluated cp_uneval_guard; + + bool is_ptrdatamem; + bool is_ptrmemfunc; + if (TREE_CODE (fn_type) == REFERENCE_TYPE) + { + tree deref_fn_type = TREE_TYPE (fn_type); + is_ptrdatamem = TYPE_PTRDATAMEM_P (deref_fn_type); + is_ptrmemfunc = TYPE_PTRMEMFUNC_P (deref_fn_type); + + /* Dereference fn_type if it is a pointer to member. */ + if (is_ptrdatamem || is_ptrmemfunc) + fn_type = deref_fn_type; + } + else + { + is_ptrdatamem = TYPE_PTRDATAMEM_P (fn_type); + is_ptrmemfunc = TYPE_PTRMEMFUNC_P (fn_type); + } + + if (is_ptrdatamem && TREE_VEC_LENGTH (arg_types) != 1) + /* A pointer to data member with non-one argument is not invocable. */ + return false; + + if (is_ptrmemfunc && TREE_VEC_LENGTH (arg_types) == 0) + /* A pointer to member function with no arguments is not invocable. */ + return false; + + /* Construct an expression of a pointer to member. */ + tree datum; + if (is_ptrdatamem || is_ptrmemfunc) + { + tree datum_type = TREE_VEC_ELT (arg_types, 0); + + /* Dereference datum. */ + if (CLASS_TYPE_P (datum_type)) + { + bool is_refwrap = false; + + tree datum_decl = TYPE_NAME (TYPE_MAIN_VARIANT (datum_type)); + if (decl_in_std_namespace_p (datum_decl)) + { + tree name = DECL_NAME (datum_decl); + if (name && (id_equal (name, "reference_wrapper"))) + { + /* Handle std::reference_wrapper. */ + is_refwrap = true; + datum_type = cp_build_reference_type (datum_type, false); + } + } + + datum = build_trait_object (datum_type); + + /* If datum_type was not std::reference_wrapper, check if it has + operator*() overload. If datum_type was std::reference_wrapper, + avoid dereferencing the datum twice. */ + if (!is_refwrap) + if (get_class_binding (datum_type, get_identifier ("operator*"))) + /* Handle operator*(). */ + datum = build_x_indirect_ref (UNKNOWN_LOCATION, datum, + RO_UNARY_STAR, NULL_TREE, + tf_none); + } + else if (POINTER_TYPE_P (datum_type)) + datum = build_trait_object (TREE_TYPE (datum_type)); + else + datum = build_trait_object (datum_type); + } + + /* Build a function expression. */ + tree fn; + if (is_ptrdatamem) + fn = build_m_component_ref (datum, build_trait_object (fn_type), tf_none); + else if (is_ptrmemfunc) + fn = build_trait_object (TYPE_PTRMEMFUNC_FN_TYPE (fn_type)); + else + fn = build_trait_object (fn_type); + + /* Construct arguments to the function and an expression of a call. */ + if (!is_ptrdatamem) + { + releasing_vec args; + + if (is_ptrmemfunc) + { + /* A pointer to member function is internally converted to a pointer + to function that takes a pointer to the dereferenced datum type + as its first argument and original arguments afterward. If the + function is a const member function, the first argument also + requires a const datum pointer and vice-versa. */ + + tree datum_type = TREE_TYPE (datum); + if (TYPE_REF_P (datum_type)) + datum_type = TREE_TYPE (datum_type); + + datum = build_trait_object (build_pointer_type (datum_type)); + vec_safe_push (args, datum); + } + + for (int i = is_ptrmemfunc ? 1 : 0; i < TREE_VEC_LENGTH (arg_types); ++i) + { + tree arg_type = TREE_VEC_ELT (arg_types, i); + tree arg = build_trait_object (arg_type); + vec_safe_push (args, arg); + } + + fn = finish_call_expr (fn, &args, false, false, tf_none); + } + + if (error_operand_p (fn)) + return false; + + return true; +} + /* Return true if DERIVED is pointer interconvertible base of BASE. */ static bool @@ -12181,6 +12312,9 @@ trait_expr_value (cp_trait_kind kind, tree type1, tree type2) case CPTK_IS_FUNCTION: return type_code1 == FUNCTION_TYPE; + case CPTK_IS_INVOCABLE: + return is_invocable_p (type1, type2); + case CPTK_IS_LAYOUT_COMPATIBLE: return layout_compatible_type_p (type1, type2); @@ -12390,6 +12524,7 @@ finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2) break; case CPTK_IS_CONVERTIBLE: + case CPTK_IS_INVOCABLE: case CPTK_IS_NOTHROW_ASSIGNABLE: case CPTK_IS_NOTHROW_CONSTRUCTIBLE: case CPTK_IS_NOTHROW_CONVERTIBLE: diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C b/gcc/testsuite/g++.dg/ext/has-builtin-1.C index b1430e9bd8b..3a9bda1ee03 100644 --- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C +++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C @@ -92,6 +92,9 @@ #if !__has_builtin (__is_function) # error "__has_builtin (__is_function) failed" #endif +#if !__has_builtin (__is_invocable) +# error "__has_builtin (__is_invocable) failed" +#endif #if !__has_builtin (__is_layout_compatible) # error "__has_builtin (__is_layout_compatible) failed" #endif diff --git a/gcc/testsuite/g++.dg/ext/is_invocable1.C b/gcc/testsuite/g++.dg/ext/is_invocable1.C new file mode 100644 index 00000000000..2fd3906b571 --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/is_invocable1.C @@ -0,0 +1,337 @@ +// { dg-do compile { target c++11 } } + +#define SA(X) static_assert((X),#X) + +using func_type_v0 = void(*)(); + +SA( __is_invocable( func_type_v0 ) ); +SA( ! __is_invocable( func_type_v0, int ) ); + +using func_type_i0 = int(*)(); + +SA( __is_invocable( func_type_i0 ) ); +SA( ! __is_invocable( func_type_i0, int ) ); + +using func_type_l0 = int&(*)(); + +SA( __is_invocable( func_type_l0 ) ); +SA( ! __is_invocable( func_type_l0(int) ) ); + +using func_type_ii = int(*)(int); + +SA( ! __is_invocable( func_type_ii ) ); +SA( __is_invocable( func_type_ii, int ) ); + +using func_type_il = int(*)(int&); + +SA( ! __is_invocable( func_type_il ) ); +SA( ! __is_invocable( func_type_il, int ) ); +SA( __is_invocable( func_type_il, int& ) ); + +using func_type_ir = int(*)(int&&); + +SA( ! __is_invocable( func_type_ir ) ); +SA( ! __is_invocable( func_type_ir, int& ) ); +SA( __is_invocable( func_type_ir, int ) ); +SA( __is_invocable( func_type_ir, int&& ) ); + +struct A { }; + +using mem_type_i = int A::*; + +SA( ! __is_invocable( mem_type_i ) ); +SA( ! __is_invocable( mem_type_i, int ) ); +SA( ! __is_invocable( mem_type_i, int* ) ); +SA( ! __is_invocable( mem_type_i, int& ) ); +SA( ! __is_invocable( mem_type_i, int&& ) ); +SA( __is_invocable( mem_type_i, A ) ); +SA( __is_invocable( mem_type_i, A* ) ); +SA( __is_invocable( mem_type_i, A& ) ); +SA( __is_invocable( mem_type_i, A&& ) ); +SA( __is_invocable( mem_type_i, const A& ) ); +SA( ! __is_invocable( mem_type_i, A&, int ) ); + +using memfun_type_i = int (A::*)(); + +SA( ! __is_invocable( memfun_type_i ) ); +SA( ! __is_invocable( memfun_type_i, int ) ); +SA( ! __is_invocable( memfun_type_i, int* ) ); +SA( ! __is_invocable( memfun_type_i, int& ) ); +SA( ! __is_invocable( memfun_type_i, int&& ) ); +SA( __is_invocable( memfun_type_i, A ) ); +SA( __is_invocable( memfun_type_i, A* ) ); +SA( __is_invocable( memfun_type_i, A& ) ); +SA( __is_invocable( memfun_type_i, A&& ) ); +SA( ! __is_invocable( memfun_type_i, const A& ) ); +SA( ! __is_invocable( memfun_type_i, A&, int ) ); + +using memfun_type_ic = int (A::*)() const; + +SA( ! __is_invocable( memfun_type_ic ) ); +SA( ! __is_invocable( memfun_type_ic, int ) ); +SA( ! __is_invocable( memfun_type_ic, int& ) ); +SA( __is_invocable( memfun_type_ic, A& ) ); +SA( __is_invocable( memfun_type_ic, A* ) ); +SA( ! __is_invocable( memfun_type_ic, A&, int ) ); +SA( ! __is_invocable( memfun_type_ic, A*, int& ) ); +SA( __is_invocable( memfun_type_ic, const A& ) ); +SA( __is_invocable( memfun_type_ic, const A* ) ); +SA( ! __is_invocable( memfun_type_ic, const A&, int& ) ); +SA( ! __is_invocable( memfun_type_ic, const A*, int ) ); + +using memfun_type_iic = int& (A::*)(int&) const; + +SA( ! __is_invocable( memfun_type_iic ) ); +SA( ! __is_invocable( memfun_type_iic, int ) ); +SA( ! __is_invocable( memfun_type_iic, int& ) ); +SA( ! __is_invocable( memfun_type_iic, A&, int ) ); +SA( __is_invocable( memfun_type_iic, A&, int& ) ); +SA( ! __is_invocable( memfun_type_iic, A*, int ) ); +SA( __is_invocable( memfun_type_iic, A*, int& ) ); +SA( ! __is_invocable( memfun_type_iic, const A&, int ) ); +SA( ! __is_invocable( memfun_type_iic, const A&, int&, int ) ); +SA( __is_invocable( memfun_type_iic, const A&, int& ) ); +SA( __is_invocable( memfun_type_iic, const A*, int& ) ); + +struct B { + int& operator()(); + long& operator()() const; + bool& operator()(int); +private: + void operator()(int, int); +}; +using CB = const B; + +SA( __is_invocable( B ) ); +SA( __is_invocable( B& ) ); +SA( __is_invocable( B&& ) ); +SA( ! __is_invocable( B* ) ); +SA( __is_invocable( CB ) ); +SA( __is_invocable( CB& ) ); +SA( ! __is_invocable( CB* ) ); + +SA( __is_invocable( B, int ) ); +SA( __is_invocable( B&, int ) ); +SA( __is_invocable( B&&, int ) ); +SA( ! __is_invocable( B*, int ) ); +SA( ! __is_invocable( CB, int ) ); +SA( ! __is_invocable( CB&, int ) ); +SA( ! __is_invocable( CB*, int ) ); + +SA( ! __is_invocable( B, int, int ) ); +SA( ! __is_invocable( B&, int, int ) ); +SA( ! __is_invocable( B&&, int, int ) ); +SA( ! __is_invocable( B*, int, int ) ); +SA( ! __is_invocable( CB, int, int ) ); +SA( ! __is_invocable( CB&, int, int ) ); +SA( ! __is_invocable( CB*, int, int ) ); + +struct C : B { int& operator()() = delete; }; +using CC = const C; + +SA( ! __is_invocable( C ) ); +SA( ! __is_invocable( C& ) ); +SA( ! __is_invocable( C&& ) ); +SA( ! __is_invocable( C* ) ); +SA( ! __is_invocable( CC ) ); +SA( ! __is_invocable( CC& ) ); +SA( ! __is_invocable( CC* ) ); + +struct D { B operator*(); }; +using CD = const D; + +SA( ! __is_invocable( D ) ); + +struct E { void v(); }; +using CE = const E; + +SA( ! __is_invocable( E ) ); +SA( ! __is_invocable( void (E::*)() ) ); +SA( __is_invocable( void (E::*)(), E ) ); +SA( __is_invocable( void (E::*)(), E* ) ); +SA( ! __is_invocable( void (E::*)(), CE ) ); + +struct F : E {}; +using CF = const F; + +SA( ! __is_invocable( F ) ); +SA( __is_invocable( void (E::*)(), F ) ); +SA( __is_invocable( void (E::*)(), F* ) ); +SA( ! __is_invocable( void (E::*)(), CF ) ); + +struct G { E operator*(); }; +using CG = const G; + +SA( ! __is_invocable( G ) ); +SA( __is_invocable( void (E::*)(), G ) ); +SA( ! __is_invocable( void (E::*)(), G* ) ); +SA( ! __is_invocable( void (E::*)(), CG ) ); + +struct H { E& operator*(); }; +using CH = const H; + +SA( ! __is_invocable( H ) ); +SA( __is_invocable( void (E::*)(), H ) ); +SA( ! __is_invocable( void (E::*)(), H* ) ); +SA( ! __is_invocable( void (E::*)(), CH ) ); + +struct I { E&& operator*(); }; +using CI = const I; + +SA( ! __is_invocable( I ) ); +SA( __is_invocable( void (E::*)(), I ) ); +SA( ! __is_invocable( void (E::*)(), I* ) ); +SA( ! __is_invocable( void (E::*)(), CI ) ); + +struct K { E* operator*(); }; +using CK = const K; + +SA( ! __is_invocable( K ) ); +SA( ! __is_invocable( void (E::*)(), K ) ); +SA( ! __is_invocable( void (E::*)(), K* ) ); +SA( ! __is_invocable( void (E::*)(), CK ) ); + +struct L { CE operator*(); }; +using CL = const L; + +SA( ! __is_invocable( L ) ); +SA( ! __is_invocable( void (E::*)(), L ) ); +SA( ! __is_invocable( void (E::*)(), L* ) ); +SA( ! __is_invocable( void (E::*)(), CL ) ); + +struct M { + int i; +private: + long l; +}; +using CM = const M; + +SA( ! __is_invocable( M ) ); +SA( ! __is_invocable( M& ) ); +SA( ! __is_invocable( M&& ) ); +SA( ! __is_invocable( M* ) ); +SA( ! __is_invocable( CM ) ); +SA( ! __is_invocable( CM& ) ); +SA( ! __is_invocable( CM* ) ); + +SA( ! __is_invocable( int M::* ) ); +SA( __is_invocable( int M::*, M ) ); +SA( __is_invocable( int M::*, M& ) ); +SA( __is_invocable( int M::*, M&& ) ); +SA( __is_invocable( int M::*, M* ) ); +SA( __is_invocable( int M::*, CM ) ); +SA( __is_invocable( int M::*, CM& ) ); +SA( __is_invocable( int M::*, CM* ) ); +SA( ! __is_invocable( int M::*, int ) ); + +SA( ! __is_invocable( int CM::* ) ); +SA( __is_invocable( int CM::*, M ) ); +SA( __is_invocable( int CM::*, M& ) ); +SA( __is_invocable( int CM::*, M&& ) ); +SA( __is_invocable( int CM::*, M* ) ); +SA( __is_invocable( int CM::*, CM ) ); +SA( __is_invocable( int CM::*, CM& ) ); +SA( __is_invocable( int CM::*, CM* ) ); +SA( ! __is_invocable( int CM::*, int ) ); + +SA( ! __is_invocable( long M::* ) ); +SA( __is_invocable( long M::*, M ) ); +SA( __is_invocable( long M::*, M& ) ); +SA( __is_invocable( long M::*, M&& ) ); +SA( __is_invocable( long M::*, M* ) ); +SA( __is_invocable( long M::*, CM ) ); +SA( __is_invocable( long M::*, CM& ) ); +SA( __is_invocable( long M::*, CM* ) ); +SA( ! __is_invocable( long M::*, long ) ); + +SA( ! __is_invocable( long CM::* ) ); +SA( __is_invocable( long CM::*, M ) ); +SA( __is_invocable( long CM::*, M& ) ); +SA( __is_invocable( long CM::*, M&& ) ); +SA( __is_invocable( long CM::*, M* ) ); +SA( __is_invocable( long CM::*, CM ) ); +SA( __is_invocable( long CM::*, CM& ) ); +SA( __is_invocable( long CM::*, CM* ) ); +SA( ! __is_invocable( long CM::*, long ) ); + +SA( ! __is_invocable( short M::* ) ); +SA( __is_invocable( short M::*, M ) ); +SA( __is_invocable( short M::*, M& ) ); +SA( __is_invocable( short M::*, M&& ) ); +SA( __is_invocable( short M::*, M* ) ); +SA( __is_invocable( short M::*, CM ) ); +SA( __is_invocable( short M::*, CM& ) ); +SA( __is_invocable( short M::*, CM* ) ); +SA( ! __is_invocable( short M::*, short ) ); + +SA( ! __is_invocable( short CM::* ) ); +SA( __is_invocable( short CM::*, M ) ); +SA( __is_invocable( short CM::*, M& ) ); +SA( __is_invocable( short CM::*, M&& ) ); +SA( __is_invocable( short CM::*, M* ) ); +SA( __is_invocable( short CM::*, CM ) ); +SA( __is_invocable( short CM::*, CM& ) ); +SA( __is_invocable( short CM::*, CM* ) ); +SA( ! __is_invocable( short CM::*, short ) ); + +struct N { M operator*(); }; +SA( __is_invocable( int M::*, N ) ); +SA( ! __is_invocable( int M::*, N* ) ); + +struct O { M& operator*(); }; +SA( __is_invocable( int M::*, O ) ); +SA( ! __is_invocable( int M::*, O* ) ); + +struct P { M&& operator*(); }; +SA( __is_invocable( int M::*, P ) ); +SA( ! __is_invocable( int M::*, P* ) ); + +struct Q { M* operator*(); }; +SA( ! __is_invocable( int M::*, Q ) ); +SA( ! __is_invocable( int M::*, Q* ) ); + +struct R { void operator()(int = 0); }; + +SA( __is_invocable( R ) ); +SA( __is_invocable( R, int ) ); +SA( ! __is_invocable( R, int, int ) ); + +struct S { void operator()(int, ...); }; + +SA( ! __is_invocable( S ) ); +SA( __is_invocable( S, int ) ); +SA( __is_invocable( S, int, int ) ); +SA( __is_invocable( S, int, int, int ) ); + +void fn1() {} + +SA( __is_invocable( decltype(fn1) ) ); + +void fn2(int arr[10]); + +SA( __is_invocable( decltype(fn2), int[10] ) ); +SA( __is_invocable( decltype(fn2), int(&)[10] ) ); +SA( __is_invocable( decltype(fn2), int(&&)[10] ) ); +SA( ! __is_invocable( decltype(fn2), int(*)[10] ) ); +SA( ! __is_invocable( decltype(fn2), int(*&)[10] ) ); +SA( ! __is_invocable( decltype(fn2), int(*&&)[10] ) ); +SA( __is_invocable( decltype(fn2), int[] ) ); + +auto lambda = []() {}; + +SA( __is_invocable( decltype(lambda) ) ); + +template +struct can_invoke { + static constexpr bool value = __is_invocable( Func, Args... ); +}; + +SA( can_invoke::value ); + +struct T { + void func() const {} + int data; +}; + +SA( __is_invocable( decltype(&T::func)&, T& ) ); +SA( __is_invocable( decltype(&T::data)&, T& ) ); diff --git a/gcc/testsuite/g++.dg/ext/is_invocable2.C b/gcc/testsuite/g++.dg/ext/is_invocable2.C new file mode 100644 index 00000000000..a68aefd3e13 --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/is_invocable2.C @@ -0,0 +1,139 @@ +// { dg-do compile { target c++11 } } +// __is_invocable should handle std::reference_wrapper correctly. + +#include + +#define SA(X) static_assert((X),#X) + +using std::reference_wrapper; + +using func_type_v0 = void(*)(); + +SA( __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper, int ) ); + +using func_type_i0 = int(*)(); + +SA( __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper, int ) ); + +using func_type_l0 = int&(*)(); + +SA( __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper ) ); + +using func_type_ii = int(*)(int); + +SA( ! __is_invocable( reference_wrapper ) ); +SA( __is_invocable( reference_wrapper, int ) ); + +using func_type_il = int(*)(int&); + +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper, int ) ); +SA( __is_invocable( reference_wrapper, int& ) ); + +using func_type_ir = int(*)(int&&); + +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper, int& ) ); +SA( __is_invocable( reference_wrapper, int ) ); +SA( __is_invocable( reference_wrapper, int&& ) ); + +struct A { }; + +using mem_type_i = int A::*; + +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper, int ) ); +SA( ! __is_invocable( reference_wrapper, int* ) ); +SA( ! __is_invocable( reference_wrapper, int& ) ); +SA( ! __is_invocable( reference_wrapper, int&& ) ); +SA( __is_invocable( reference_wrapper, A ) ); +SA( __is_invocable( reference_wrapper, A* ) ); +SA( __is_invocable( reference_wrapper, A& ) ); +SA( __is_invocable( reference_wrapper, A&& ) ); + +using memfun_type_i = int (A::*)(); + +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper, int ) ); +SA( ! __is_invocable( reference_wrapper, int* ) ); +SA( ! __is_invocable( reference_wrapper, int& ) ); +SA( ! __is_invocable( reference_wrapper, int&& ) ); +SA( __is_invocable( reference_wrapper, A ) ); +SA( __is_invocable( reference_wrapper, A* ) ); +SA( __is_invocable( reference_wrapper, A& ) ); +SA( __is_invocable( reference_wrapper, A&& ) ); +SA( ! __is_invocable( reference_wrapper, const A& ) ); +SA( ! __is_invocable( reference_wrapper, A&, int ) ); + +using memfun_type_ic = int (A::*)() const; + +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper, int ) ); +SA( ! __is_invocable( reference_wrapper, int& ) ); +SA( __is_invocable( reference_wrapper, A& ) ); +SA( __is_invocable( reference_wrapper, A* ) ); +SA( ! __is_invocable( reference_wrapper, A&, int ) ); +SA( ! __is_invocable( reference_wrapper, A*, int& ) ); +SA( __is_invocable( reference_wrapper, const A& ) ); +SA( __is_invocable( reference_wrapper, const A* ) ); +SA( ! __is_invocable( reference_wrapper, const A&, int& ) ); +SA( ! __is_invocable( reference_wrapper, const A*, int ) ); + +using memfun_type_iic = int& (A::*)(int&) const; + +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper, int ) ); +SA( ! __is_invocable( reference_wrapper, int& ) ); +SA( ! __is_invocable( reference_wrapper, A&, int ) ); +SA( __is_invocable( reference_wrapper, A&, int& ) ); +SA( ! __is_invocable( reference_wrapper, A*, int ) ); +SA( __is_invocable( reference_wrapper, A*, int& ) ); +SA( ! __is_invocable( reference_wrapper, const A&, int ) ); +SA( ! __is_invocable( reference_wrapper, const A&, int&, int ) ); +SA( __is_invocable( reference_wrapper, const A&, int& ) ); +SA( __is_invocable( reference_wrapper, const A*, int& ) ); + +struct B { + int& operator()(); + long& operator()() const; + bool& operator()(int); +private: + void operator()(int, int); +}; +using CB = const B; + +SA( __is_invocable( reference_wrapper ) ); +SA( __is_invocable( reference_wrapper& ) ); +SA( __is_invocable( reference_wrapper&& ) ); +SA( __is_invocable( reference_wrapper ) ); +SA( __is_invocable( reference_wrapper& ) ); +SA( __is_invocable( reference_wrapper, int ) ); +SA( ! __is_invocable( reference_wrapper&, int, int ) ); + +struct C : B { int& operator()() = delete; }; +using CC = const C; + +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper& ) ); +SA( ! __is_invocable( reference_wrapper&& ) ); +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper& ) ); + +struct D { B operator*(); }; +using CD = const D; + +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper& ) ); +SA( ! __is_invocable( reference_wrapper&& ) ); +SA( ! __is_invocable( reference_wrapper* ) ); +SA( ! __is_invocable( reference_wrapper ) ); +SA( ! __is_invocable( reference_wrapper* ) ); + +std::function fn = []() {}; +auto refwrap = std::ref(fn); + +SA( __is_invocable( decltype(fn) ) ); +SA( __is_invocable( decltype(refwrap) ) ); diff --git a/gcc/testsuite/g++.dg/ext/is_invocable3.C b/gcc/testsuite/g++.dg/ext/is_invocable3.C new file mode 100644 index 00000000000..e2b0c5ef406 --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/is_invocable3.C @@ -0,0 +1,51 @@ +// { dg-do compile { target c++11 } } +// __is_invocable should handle incomplete class correctly. + +#define SA(X) static_assert((X),#X) + +struct Incomplete; + +SA( ! __is_invocable( Incomplete ) ); // { dg-error "incomplete type" } +SA( ! __is_invocable( Incomplete, int ) ); // { dg-error "incomplete type" } + +SA( ! __is_invocable( int, Incomplete, int ) ); // { dg-error "incomplete type" } +SA( ! __is_invocable( int, Incomplete ) ); // { dg-error "incomplete type" } + +SA( ! __is_invocable( Incomplete, Incomplete() ) ); // { dg-error "incomplete type" } +SA( ! __is_invocable( Incomplete, Incomplete(int), int ) ); // { dg-error "incomplete type" } +SA( ! __is_invocable( Incomplete, Incomplete(int, int), int, int ) ); // { dg-error "incomplete type" } + +SA( ! __is_invocable( Incomplete, Incomplete(), int, int ) ); // { dg-error "incomplete type" } + +SA( ! __is_invocable( int(Incomplete), Incomplete ) ); // { dg-error "incomplete type" } +SA( ! __is_invocable( int(int, Incomplete), int, Incomplete ) ); // { dg-error "incomplete type" } +SA( ! __is_invocable( int(int, Incomplete), Incomplete, int ) ); // { dg-error "incomplete type" } + +SA( __is_invocable( int(Incomplete&), Incomplete& ) ); // { dg-bogus "incomplete type" } +SA( __is_invocable( int(int, Incomplete&), int, Incomplete& ) ); // { dg-bogus "incomplete type" } + +SA( __is_invocable( int(Incomplete&&), Incomplete&& ) ); // { dg-bogus "incomplete type" } +SA( __is_invocable( int(int, Incomplete&&), int, Incomplete&& ) ); // { dg-bogus "incomplete type" } + +SA( __is_invocable( int(const Incomplete&&), const Incomplete&& ) ); // { dg-bogus "incomplete type" } +SA( __is_invocable( int(int, const Incomplete&&), int, const Incomplete&& ) ); // { dg-bogus "incomplete type" } + +SA( __is_invocable( int(const Incomplete&), const Incomplete& ) ); // { dg-bogus "incomplete type" } +SA( __is_invocable( int(int, const Incomplete&), int, const Incomplete& ) ); // { dg-bogus "incomplete type" } + +SA( __is_invocable( int(const Incomplete&), Incomplete& ) ); // { dg-bogus "incomplete type" } +SA( __is_invocable( int(int, const Incomplete&), int, Incomplete& ) ); // { dg-bogus "incomplete type" } + +SA( __is_invocable( int Incomplete::*, const Incomplete& ) ); // { dg-bogus "incomplete type" } +SA( ! __is_invocable( void (Incomplete::*)(long&), const Incomplete*, long& ) ); // { dg-bogus "incomplete type" } +SA( __is_invocable( void (Incomplete::*)(long&) const, Incomplete*, long& ) ); // { dg-bogus "incomplete type" } + +template +struct Holder { T t; }; + +SA( __is_invocable( int(Holder&), Holder& ) ); // { dg-bogus "incomplete type" } + +// Define Incomplete, which is now not incomplete. +struct Incomplete { void operator()(); }; + +SA( __is_invocable( Incomplete ) ); // { dg-bogus "incomplete type" } diff --git a/gcc/testsuite/g++.dg/ext/is_invocable4.C b/gcc/testsuite/g++.dg/ext/is_invocable4.C new file mode 100644 index 00000000000..d1efccf08f8 --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/is_invocable4.C @@ -0,0 +1,33 @@ +// { dg-do compile { target c++11 } } +// Failed access check should be a substitution failure, not an error. + +#define SA(X) static_assert((X),#X) + +template +struct bool_constant { static constexpr bool value = B; }; + +template +struct is_invocable +: public bool_constant<__is_invocable(_Fn, _ArgTypes...)> +{ }; + +#if __cpp_variable_templates +template +constexpr bool is_invocable_v = __is_invocable(_Fn, _ArgTypes...); +#endif + +class Private +{ + void operator()() const + { + SA( ! is_invocable::value ); +#if __cpp_variable_templates + SA( ! is_invocable_v ); +#endif + } +}; + +SA( ! is_invocable::value ); +#if __cpp_variable_templates +SA( ! is_invocable_v ); +#endif