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{ "id": 2196278, "url": "http://patchwork.ozlabs.org/api/patches/2196278/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260213101311.401761-1-tkaminsk@redhat.com/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260213101311.401761-1-tkaminsk@redhat.com>", "list_archive_url": null, "date": "2026-02-13T10:13:07", "name": "libstdc++: Make __gnu_test:uneq_allocator(int) constructor explicit.", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "b936e25c5029471c323db24fdfbc33a9965bce83", "submitter": { "id": 90409, "url": "http://patchwork.ozlabs.org/api/people/90409/?format=api", "name": "Tomasz Kaminski", "email": "tkaminsk@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260213101311.401761-1-tkaminsk@redhat.com/mbox/", "series": [ { "id": 492075, "url": "http://patchwork.ozlabs.org/api/series/492075/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=492075", "date": "2026-02-13T10:13:07", "name": "libstdc++: Make __gnu_test:uneq_allocator(int) constructor explicit.", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/492075/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2196278/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2196278/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ 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b=fSBrX2Vr4gA4O1x5PKAeQkly3/r3XYSjF5P5MAqIP2Z1iWyTGee63ZLpDUBIbBfuk+GDP0\n 6zp5VDBXVxKTwkiq6Rkat9ZHQToTtf7G9bMrNYgIgB2VVMvqW9nxvzuJffLxzyE9FfuR5U\n YDBRH2MSy8jWjI2rdmx+ZqdCZG4BIPw=", "X-MC-Unique": "qrp6FLRWOdSM88WkoRIwYQ-1", "X-Mimecast-MFC-AGG-ID": "qrp6FLRWOdSM88WkoRIwYQ_1770977594", "From": "=?utf-8?q?Tomasz_Kami=C5=84ski?= <tkaminsk@redhat.com>", "To": "libstdc++@gcc.gnu.org,\n\tgcc-patches@gcc.gnu.org", "Cc": "Jonathan Wakely <jwakely@redhat.com>", "Subject": "[PATCH] libstdc++: Make __gnu_test:uneq_allocator(int) constructor\n explicit.", "Date": "Fri, 13 Feb 2026 11:13:07 +0100", "Message-ID": "<20260213101311.401761-1-tkaminsk@redhat.com>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.0 on 10.30.177.17", "X-Mimecast-Spam-Score": "0", "X-Mimecast-MFC-PROC-ID": "7M-u-HYnWtnV5kVUkF7DanjV8bfqCBQLOHtXYfe6fQc_1770977594", "X-Mimecast-Originator": "redhat.com", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "X-BeenThere": "gcc-patches@gcc.gnu.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Gcc-patches mailing list <gcc-patches.gcc.gnu.org>", "List-Unsubscribe": "<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>", "List-Archive": "<https://gcc.gnu.org/pipermail/gcc-patches/>", "List-Post": "<mailto:gcc-patches@gcc.gnu.org>", "List-Help": "<mailto:gcc-patches-request@gcc.gnu.org?subject=help>", "List-Subscribe": "<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "Presence implicit conversion from int to it's allocator, makes constructing\nstring from rvalue of same string type and int ambiguous, as none of following\ncandidates is better:\n basic_string(basic_string&&, allocator_type)\n // conversion from int to allocator for second argument\n basic_string(const basic_string&, int, allocator_type)\n // reference adjustment for first argument\n\nThis makes __gnu_test:uneq_allocator(int) constructor explicit, to avoid\nabove issues.\n\nlibstdc++-v3/ChangeLog:\n\n\t* testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc\n\t(__gnu_test::uneq_allocator(int)): Declare as explicit.\n\t* testsuite/std/memory/indirect/ctor.cc: Construct uneq_allocator\n\tfrom int explicitly.\n\t* testsuite/std/memory/polymorphic/ctor.cc: Likewise.\n\t* testsuite/std/memory/polymorphic/ctor_poly.cc: Likewise.\n\t* testsuite/util/testsuite_allocator.h: Likewise.\n\nReviewed-by: Jonathan Wakely <jwakely@redhat.com>\nSigned-off-by: Tomasz Kamiński <tkaminsk@redhat.com>\n---\n .../scoped_allocator/construct_pair_c++2a.cc | 12 ++++----\n .../testsuite/std/memory/indirect/ctor.cc | 29 +++++++++++--------\n .../testsuite/std/memory/polymorphic/ctor.cc | 27 ++++++++++-------\n .../std/memory/polymorphic/ctor_poly.cc | 18 +++++++-----\n .../testsuite/util/testsuite_allocator.h | 2 +-\n 5 files changed, 51 insertions(+), 37 deletions(-)", "diff": "diff --git a/libstdc++-v3/testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc b/libstdc++-v3/testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc\nindex ecc26cb5a63..4eb174a89f3 100644\n--- a/libstdc++-v3/testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc\n+++ b/libstdc++-v3/testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc\n@@ -39,10 +39,10 @@ void\n test01()\n {\n using value_type = std::pair<std::pair<X, int>, std::pair<int, X>>;\n- using scoped_alloc\n- = std::scoped_allocator_adaptor<__gnu_test::uneq_allocator<value_type>>;\n+ using uneq_alloc = __gnu_test::uneq_allocator<value_type>;\n+ using scoped_alloc = std::scoped_allocator_adaptor<uneq_alloc>;\n \n- const scoped_alloc a(10);\n+ const scoped_alloc a(uneq_alloc(10));\n std::vector<value_type, scoped_alloc> v(a);\n VERIFY( v.get_allocator().get_personality() == a.get_personality() );\n \n@@ -65,11 +65,11 @@ void\n test02()\n {\n using value_type = std::pair<std::pair<X, int>, std::pair<int, X>>;\n+ using uneq_alloc = __gnu_test::uneq_allocator<value_type>;\n using scoped_alloc\n- = std::scoped_allocator_adaptor<__gnu_test::uneq_allocator<value_type>,\n-\t\t\t\t X::allocator_type>;\n+ = std::scoped_allocator_adaptor<uneq_alloc, X::allocator_type>;\n \n- const scoped_alloc a(10, 20);\n+ const scoped_alloc a(uneq_alloc(10), X::allocator_type(20));\n std::vector<value_type, scoped_alloc> v(a);\n VERIFY( v.get_allocator().get_personality() == a.get_personality() );\n \ndiff --git a/libstdc++-v3/testsuite/std/memory/indirect/ctor.cc b/libstdc++-v3/testsuite/std/memory/indirect/ctor.cc\nindex dfd9341582f..ec34e584b3f 100644\n--- a/libstdc++-v3/testsuite/std/memory/indirect/ctor.cc\n+++ b/libstdc++-v3/testsuite/std/memory/indirect/ctor.cc\n@@ -16,9 +16,9 @@\n \n using __gnu_test::uneq_allocator;\n using UneqAlloc = uneq_allocator<int>;\n-using ScopedAlloc = std::scoped_allocator_adaptor<\n- uneq_allocator<std::vector<int, UneqAlloc>>,\n- UneqAlloc>;\n+using UneqVecAlloc = uneq_allocator<std::vector<int, UneqAlloc>>;\n+using ScopedAlloc\n+ = std::scoped_allocator_adaptor<UneqVecAlloc, UneqAlloc>;\n \n struct Obj\n {\n@@ -61,9 +61,10 @@ test_default_ctor()\n if (std::is_constant_evaluated())\n return;\n \n+ const ScopedAlloc scopedAlloc(UneqVecAlloc(11), UneqAlloc(22));\n // Object is constructed using allocator-aware constructor.\n std::indirect<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i3(std::allocator_arg, ScopedAlloc(11, 22));\n+ i3(std::allocator_arg, scopedAlloc);\n VERIFY( i3->empty() );\n VERIFY( i3->get_allocator().get_personality() == 22 );\n VERIFY( i3.get_allocator().get_personality() == 11 );\n@@ -99,17 +100,18 @@ test_forwarding_ctor()\n if (std::is_constant_evaluated())\n return;\n \n+ const ScopedAlloc scopedAlloc(UneqVecAlloc(11), UneqAlloc(22));\n std::vector<int, UneqAlloc> v{1, 2, 3, 4, 5};\n // Object is constructed using allocator-aware constructor.\n std::indirect<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i7(std::allocator_arg, ScopedAlloc(11, 22), v);\n+ i7(std::allocator_arg, scopedAlloc, v);\n VERIFY( i7->size() == 5 );\n VERIFY( v.size() == 5 );\n VERIFY( i7->get_allocator().get_personality() == 22 );\n VERIFY( i7.get_allocator().get_personality() == 11 );\n \n std::indirect<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i8(std::allocator_arg, ScopedAlloc(11, 22), std::move(v));\n+ i8(std::allocator_arg, scopedAlloc, std::move(v));\n VERIFY( i8->size() == 5 );\n VERIFY( v.size() == 0 );\n VERIFY( i8->get_allocator().get_personality() == 22 );\n@@ -130,14 +132,16 @@ test_inplace_ctor()\n VERIFY( i2->c[1] == 0 );\n \n std::indirect<Obj, uneq_allocator<Obj>>\n- i3(std::allocator_arg, 42, std::in_place);\n+ i3(std::allocator_arg, uneq_allocator<Obj>(42),\n+ std::in_place);\n VERIFY( i3->i == 0 );\n VERIFY( i3->c[0] == 0 );\n VERIFY( i3->c[1] == 0 );\n VERIFY( i3.get_allocator().get_personality() == 42 );\n \n- std::indirect<Obj, uneq_allocator<Obj>>\n- i4(std::allocator_arg, 42, std::in_place, 10);\n+ std::indirect<Obj, uneq_allocator<Obj>>\n+ i4(std::allocator_arg, uneq_allocator<Obj>(42),\n+ std::in_place, 10);\n VERIFY( i4->i == 10 );\n VERIFY( i4->c[0] == 0 );\n VERIFY( i4->c[1] == 0 );\n@@ -174,15 +178,16 @@ test_inplace_ctor()\n if (std::is_constant_evaluated())\n return;\n \n+ const ScopedAlloc scopedAlloc(UneqVecAlloc(11), UneqAlloc(22));\n std::indirect<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i14(std::allocator_arg, ScopedAlloc(11, 22),\n+ i14(std::allocator_arg, scopedAlloc,\n \tstd::in_place);\n VERIFY( i14->size() == 0 );\n VERIFY( i14->get_allocator().get_personality() == 22 );\n VERIFY( i14.get_allocator().get_personality() == 11 );\n \n std::indirect<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i15(std::allocator_arg, ScopedAlloc(11, 22),\n+ i15(std::allocator_arg, scopedAlloc,\n \tstd::in_place, 5, 13);\n VERIFY( i15->size() == 5 );\n VERIFY( i15->at(0) == 13 );\n@@ -190,7 +195,7 @@ test_inplace_ctor()\n VERIFY( i15.get_allocator().get_personality() == 11 );\n \n std::indirect<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i16(std::allocator_arg, ScopedAlloc(11, 22),\n+ i16(std::allocator_arg, scopedAlloc,\n \tstd::in_place, {1, 2, 3, 4});\n VERIFY( i16->size() == 4 );\n VERIFY( i16->at(2) == 3 );\ndiff --git a/libstdc++-v3/testsuite/std/memory/polymorphic/ctor.cc b/libstdc++-v3/testsuite/std/memory/polymorphic/ctor.cc\nindex 4d043db0ea4..a81d5615b4a 100644\n--- a/libstdc++-v3/testsuite/std/memory/polymorphic/ctor.cc\n+++ b/libstdc++-v3/testsuite/std/memory/polymorphic/ctor.cc\n@@ -16,9 +16,9 @@\n \n using __gnu_test::uneq_allocator;\n using UneqAlloc = uneq_allocator<int>;\n-using ScopedAlloc = std::scoped_allocator_adaptor<\n- uneq_allocator<std::vector<int, UneqAlloc>>,\n- UneqAlloc>;\n+using UneqVecAlloc = uneq_allocator<std::vector<int, UneqAlloc>>;\n+using ScopedAlloc\n+ = std::scoped_allocator_adaptor<UneqVecAlloc, UneqAlloc>;\n \n struct Obj\n {\n@@ -48,9 +48,10 @@ test_default_ctor()\n if (std::is_constant_evaluated())\n return;\n \n+ const ScopedAlloc scopedAlloc(UneqVecAlloc(11), UneqAlloc(22));\n // Object is constructed using allocator-aware constructor.\n std::polymorphic<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i3(std::allocator_arg, ScopedAlloc(11, 22));\n+ i3(std::allocator_arg, scopedAlloc);\n VERIFY( i3->empty() );\n VERIFY( i3->get_allocator().get_personality() == 22 );\n VERIFY( i3.get_allocator().get_personality() == 11 );\n@@ -82,17 +83,18 @@ test_forwarding_ctor()\n if (std::is_constant_evaluated())\n return;\n \n+ const ScopedAlloc scopedAlloc(UneqVecAlloc(11), UneqAlloc(22));\n std::vector<int, UneqAlloc> v{1, 2, 3, 4, 5};\n // Object is constructed using allocator-aware constructor.\n std::polymorphic<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i7(std::allocator_arg, ScopedAlloc(11, 22), v);\n+ i7(std::allocator_arg, scopedAlloc, v);\n VERIFY( i7->size() == 5 );\n VERIFY( v.size() == 5 );\n VERIFY( i7->get_allocator().get_personality() == 22 );\n VERIFY( i7.get_allocator().get_personality() == 11 );\n \n std::polymorphic<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i8(std::allocator_arg, ScopedAlloc(11, 22), std::move(v));\n+ i8(std::allocator_arg, scopedAlloc, std::move(v));\n VERIFY( i8->size() == 5 );\n VERIFY( v.size() == 0 );\n VERIFY( i8->get_allocator().get_personality() == 22 );\n@@ -113,14 +115,16 @@ test_inplace_ctor()\n VERIFY( i2->c[1] == 0 );\n \n std::polymorphic<Obj, uneq_allocator<Obj>>\n- i3(std::allocator_arg, 42, std::in_place_type<Obj>);\n+ i3(std::allocator_arg, uneq_allocator<Obj>(42),\n+ std::in_place_type<Obj>);\n VERIFY( i3->i == 0 );\n VERIFY( i3->c[0] == 0 );\n VERIFY( i3->c[1] == 0 );\n VERIFY( i3.get_allocator().get_personality() == 42 );\n \n std::polymorphic<Obj, uneq_allocator<Obj>>\n- i4(std::allocator_arg, 42, std::in_place_type<Obj>, 10);\n+ i4(std::allocator_arg, uneq_allocator<Obj>(42),\n+ std::in_place_type<Obj>, 10);\n VERIFY( i4->i == 10 );\n VERIFY( i4->c[0] == 0 );\n VERIFY( i4->c[1] == 0 );\n@@ -160,15 +164,16 @@ test_inplace_ctor()\n if (std::is_constant_evaluated())\n return;\n \n+ const ScopedAlloc scopedAlloc(UneqVecAlloc(11), UneqAlloc(22));\n std::polymorphic<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i14(std::allocator_arg, ScopedAlloc(11, 22),\n+ i14(std::allocator_arg, scopedAlloc,\n \tstd::in_place_type<std::vector<int, UneqAlloc>>);\n VERIFY( i14->size() == 0 );\n VERIFY( i14->get_allocator().get_personality() == 22 );\n VERIFY( i14.get_allocator().get_personality() == 11 );\n \n std::polymorphic<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i15(std::allocator_arg, ScopedAlloc(11, 22),\n+ i15(std::allocator_arg, scopedAlloc,\n \tstd::in_place_type<std::vector<int, UneqAlloc>>, 5, 13);\n VERIFY( i15->size() == 5 );\n VERIFY( i15->at(0) == 13 );\n@@ -176,7 +181,7 @@ test_inplace_ctor()\n VERIFY( i15.get_allocator().get_personality() == 11 );\n \n std::polymorphic<std::vector<int, UneqAlloc>, ScopedAlloc>\n- i16(std::allocator_arg, ScopedAlloc(11, 22),\n+ i16(std::allocator_arg, scopedAlloc,\n \tstd::in_place_type<std::vector<int, UneqAlloc>>, {1, 2, 3, 4});\n VERIFY( i16->size() == 4 );\n VERIFY( i16->at(2) == 3 );\ndiff --git a/libstdc++-v3/testsuite/std/memory/polymorphic/ctor_poly.cc b/libstdc++-v3/testsuite/std/memory/polymorphic/ctor_poly.cc\nindex cb18031a903..2c275d199d9 100644\n--- a/libstdc++-v3/testsuite/std/memory/polymorphic/ctor_poly.cc\n+++ b/libstdc++-v3/testsuite/std/memory/polymorphic/ctor_poly.cc\n@@ -129,16 +129,17 @@ test_forwarding_ctor()\n if (std::is_constant_evaluated())\n return;\n \n+ const ScopedAlloc scopedAlloc(uneq_allocator<Base>(11), UneqAlloc(22));\n const VecDerived<int, UneqAlloc> v{1, 2, 3, 4, 5};\n // Object is constructed using allocator-aware constructor.\n std::polymorphic<Base, ScopedAlloc>\n- i5(std::allocator_arg, ScopedAlloc(11, 22), v);\n+ i5(std::allocator_arg, scopedAlloc, v);\n VERIFY( *i5 == v );\n VERIFY( i5->get_personality() == 22 );\n VERIFY( i5.get_allocator().get_personality() == 11 );\n \n std::polymorphic<Base, ScopedAlloc>\n- i6(std::allocator_arg, ScopedAlloc(11, 22), auto(v));\n+ i6(std::allocator_arg, scopedAlloc, auto(v));\n VERIFY( *i6 == v );\n VERIFY( i6->get_personality() == 22 );\n VERIFY( i6.get_allocator().get_personality() == 11 );\n@@ -156,13 +157,15 @@ test_inplace_ctor()\n VERIFY( i2->get_personality() == -2 );\n \n std::polymorphic<Base, uneq_allocator<Base>>\n- i3(std::allocator_arg, 42, std::in_place_type<ObjDerived>);\n+ i3(std::allocator_arg, uneq_allocator<Base>(42),\n+ std::in_place_type<ObjDerived>);\n VERIFY( *i3 == ObjDerived() );\n VERIFY( i3->get_personality() == -2 );\n VERIFY( i3.get_allocator().get_personality() == 42 );\n \n std::polymorphic<Base, uneq_allocator<Base>>\n- i4(std::allocator_arg, 42, std::in_place_type<ObjDerived>, 10, 20, 30);\n+ i4(std::allocator_arg, uneq_allocator<Base>(42),\n+ std::in_place_type<ObjDerived>, 10, 20, 30);\n VERIFY( *i4 == ObjDerived(10, 20, 30) );\n VERIFY( i4->get_personality() == -2 );\n VERIFY( i4.get_allocator().get_personality() == 42 );\n@@ -189,22 +192,23 @@ test_inplace_ctor()\n if (std::is_constant_evaluated())\n return;\n \n+ const ScopedAlloc scopedAlloc(uneq_allocator<Base>(11), UneqAlloc(22));\n std::polymorphic<Base, ScopedAlloc>\n- i8(std::allocator_arg, ScopedAlloc(11, 22),\n+ i8(std::allocator_arg, scopedAlloc,\n \tstd::in_place_type<VecDerived<int, UneqAlloc>>);\n VERIFY( *i8 == ze );\n VERIFY( i8->get_personality() == 22 );\n VERIFY( i8.get_allocator().get_personality() == 11 );\n \n std::polymorphic<Base, ScopedAlloc>\n- i9(std::allocator_arg, ScopedAlloc(11, 22),\n+ i9(std::allocator_arg, scopedAlloc,\n std::in_place_type<VecDerived<int, UneqAlloc>>, 5, 13);\n VERIFY( *i9 == fe );\n VERIFY( i9->get_personality() == 22 );\n VERIFY( i9.get_allocator().get_personality() == 11 );\n \n std::polymorphic<Base, ScopedAlloc>\n- i10(std::allocator_arg, ScopedAlloc(11, 22),\n+ i10(std::allocator_arg, scopedAlloc,\n \tstd::in_place_type<VecDerived<int, UneqAlloc>>, {1, 2, 3, 4});\n VERIFY( *i10 == il );\n VERIFY( i10->get_personality() == 22 );\ndiff --git a/libstdc++-v3/testsuite/util/testsuite_allocator.h b/libstdc++-v3/testsuite/util/testsuite_allocator.h\nindex 295b458e3c6..892a385e307 100644\n--- a/libstdc++-v3/testsuite/util/testsuite_allocator.h\n+++ b/libstdc++-v3/testsuite/util/testsuite_allocator.h\n@@ -332,7 +332,7 @@ namespace __gnu_test\n uneq_allocator() _GLIBCXX_USE_NOEXCEPT\n : personality(0) { }\n \n- _GLIBCXX_CONSTEXPR\n+ _GLIBCXX_CONSTEXPR explicit\n uneq_allocator(int person) _GLIBCXX_USE_NOEXCEPT\n : personality(person) { }\n \n", "prefixes": [] }