diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst --- a/clang/docs/ReleaseNotes.rst +++ b/clang/docs/ReleaseNotes.rst @@ -153,6 +153,8 @@ ^^^^^^^^^^^^^^^^^^^^^ - Implemented `P1938R3: if consteval `_. - Implemented `P2360R0: Extend init-statement to allow alias-declaration `_. +- Implemented `P0849R8: auto(x): decay-copy in the language + `_. CUDA Language Changes in Clang diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td --- a/clang/include/clang/Basic/DiagnosticSemaKinds.td +++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td @@ -2324,13 +2324,20 @@ "type %0 to use list-initialization">, InGroup; def err_auto_var_init_no_expression : Error< "initializer for variable %0 with type %1 is empty">; +def err_auto_expr_init_no_expression : Error< + "initializer for functional-style cast to %0 is empty">; def err_auto_var_init_multiple_expressions : Error< "initializer for variable %0 with type %1 contains multiple expressions">; +def err_auto_expr_init_multiple_expressions : Error< + "initializer for functional-style cast to %0 contains multiple expressions">; def err_auto_var_init_paren_braces : Error< "cannot deduce type for variable %1 with type %2 from " "%select{parenthesized|nested}0 initializer list">; def err_auto_new_ctor_multiple_expressions : Error< "new expression for type %0 contains multiple constructor arguments">; +def err_auto_expr_init_paren_braces : Error< + "cannot deduce actual type for %1 from " + "%select{parenthesized|nested}0 initializer list">; def err_auto_missing_trailing_return : Error< "'auto' return without trailing return type; deduced return types are a " "C++14 extension">; @@ -2344,6 +2351,8 @@ "variable %0 with type %1 has incompatible initializer of type %2">; def err_auto_var_deduction_failure_from_init_list : Error< "cannot deduce actual type for variable %0 with type %1 from initializer list">; +def err_auto_expr_deduction_failure : Error< + "functional-style cast to %0 has incompatible initializer of type %1">; def err_auto_new_deduction_failure : Error< "new expression for type %0 has incompatible constructor argument of type %1">; def err_auto_inconsistent_deduction : Error< diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp --- a/clang/lib/Parse/ParseDeclCXX.cpp +++ b/clang/lib/Parse/ParseDeclCXX.cpp @@ -1027,10 +1027,9 @@ } // Check for C++1y 'decltype(auto)'. - if (Tok.is(tok::kw_auto)) { - // No need to disambiguate here: an expression can't start with 'auto', - // because the typename-specifier in a function-style cast operation can't - // be 'auto'. + if (Tok.is(tok::kw_auto) && NextToken().is(tok::r_paren)) { + // the typename-specifier in a function-style cast expression may + // be 'auto' since C++2b Diag(Tok.getLocation(), getLangOpts().CPlusPlus14 ? diag::warn_cxx11_compat_decltype_auto_type_specifier diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp --- a/clang/lib/Parse/ParseExpr.cpp +++ b/clang/lib/Parse/ParseExpr.cpp @@ -1523,6 +1523,7 @@ case tok::kw___float128: case tok::kw___ibm128: case tok::kw_void: + case tok::kw_auto: case tok::kw_typename: case tok::kw_typeof: case tok::kw___vector: diff --git a/clang/lib/Parse/ParseExprCXX.cpp b/clang/lib/Parse/ParseExprCXX.cpp --- a/clang/lib/Parse/ParseExprCXX.cpp +++ b/clang/lib/Parse/ParseExprCXX.cpp @@ -2226,6 +2226,9 @@ case tok::kw_void: DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID, Policy); break; + case tok::kw_auto: + DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, DiagID, Policy); + break; case tok::kw_char: DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID, Policy); break; diff --git a/clang/lib/Parse/ParseTentative.cpp b/clang/lib/Parse/ParseTentative.cpp --- a/clang/lib/Parse/ParseTentative.cpp +++ b/clang/lib/Parse/ParseTentative.cpp @@ -1361,7 +1361,6 @@ case tok::kw_static: case tok::kw_extern: case tok::kw_mutable: - case tok::kw_auto: case tok::kw___thread: case tok::kw_thread_local: case tok::kw__Thread_local: @@ -1659,6 +1658,14 @@ return TPResult::True; + // auto(x) in C++2b + case tok::kw_auto: + if (getLangOpts().CPlusPlus2b && + NextToken().isOneOf(tok::l_paren, tok::l_brace)) + return TPResult::Ambiguous; + + return TPResult::True; + // GNU typeof support. case tok::kw_typeof: { if (NextToken().isNot(tok::l_paren)) diff --git a/clang/lib/Sema/SemaExprCXX.cpp b/clang/lib/Sema/SemaExprCXX.cpp --- a/clang/lib/Sema/SemaExprCXX.cpp +++ b/clang/lib/Sema/SemaExprCXX.cpp @@ -1467,6 +1467,9 @@ // C++1z [expr.type.conv]p1: // If the type is a placeholder for a deduced class type, [...perform class // template argument deduction...] + // C++2b: + // Otherwise, if the type contains a placeholder type, it is replaced by the + // type determined by placeholder type deduction. DeducedType *Deduced = Ty->getContainedDeducedType(); if (Deduced && isa(Deduced)) { Ty = DeduceTemplateSpecializationFromInitializer(TInfo, Entity, @@ -1474,6 +1477,36 @@ if (Ty.isNull()) return ExprError(); Entity = InitializedEntity::InitializeTemporary(TInfo, Ty); + } else if (Deduced) { + MultiExprArg Inits = Exprs; + if (ListInitialization) { + auto *ILE = cast(Exprs[0]); + Inits = MultiExprArg(ILE->getInits(), ILE->getNumInits()); + } + + if (Inits.empty()) + return ExprError(Diag(TyBeginLoc, diag::err_auto_expr_init_no_expression) + << Ty << FullRange); + if (Inits.size() > 1) { + Expr *FirstBad = Inits[1]; + return ExprError(Diag(FirstBad->getBeginLoc(), + diag::err_auto_expr_init_multiple_expressions) + << Ty << FullRange); + } + Expr *Deduce = Inits[0]; + if (isa(Deduce)) + return ExprError( + Diag(Deduce->getBeginLoc(), diag::err_auto_expr_init_paren_braces) + << ListInitialization << Ty << FullRange); + QualType DeducedType; + if (DeduceAutoType(TInfo, Deduce, DeducedType) == DAR_Failed) + return ExprError(Diag(TyBeginLoc, diag::err_auto_expr_deduction_failure) + << Ty << Deduce->getType() << FullRange + << Deduce->getSourceRange()); + if (DeducedType.isNull()) + return ExprError(); + Ty = DeducedType; + Entity = InitializedEntity::InitializeTemporary(TInfo, Ty); } if (Ty->isDependentType() || CallExpr::hasAnyTypeDependentArguments(Exprs)) { @@ -1980,12 +2013,10 @@ return ExprError(); } else if (Deduced) { bool Braced = (initStyle == CXXNewExpr::ListInit); - if (NumInits == 1) { - if (auto p = dyn_cast_or_null(Inits[0])) { - Inits = p->getInits(); - NumInits = p->getNumInits(); - Braced = true; - } + if (Braced) { + auto *ILE = cast(Inits[0]); + Inits = ILE->getInits(); + NumInits = ILE->getNumInits(); } if (initStyle == CXXNewExpr::NoInit || NumInits == 0) @@ -2001,6 +2032,10 @@ Diag(Initializer->getBeginLoc(), diag::ext_auto_new_list_init) << AllocType << TypeRange; Expr *Deduce = Inits[0]; + if (isa(Deduce)) + return ExprError( + Diag(Deduce->getBeginLoc(), diag::err_auto_expr_init_paren_braces) + << Braced << AllocType << TypeRange); QualType DeducedType; if (DeduceAutoType(AllocTypeInfo, Deduce, DeducedType) == DAR_Failed) return ExprError(Diag(StartLoc, diag::err_auto_new_deduction_failure) diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp --- a/clang/lib/Sema/SemaType.cpp +++ b/clang/lib/Sema/SemaType.cpp @@ -3395,6 +3395,7 @@ // class template argument deduction)? bool IsCXXAutoType = (Auto && Auto->getKeyword() != AutoTypeKeyword::GNUAutoType); + bool IsAutoKeyword = (Auto && Auto->getKeyword() == AutoTypeKeyword::Auto); bool IsDeducedReturnType = false; switch (D.getContext()) { @@ -3414,8 +3415,7 @@ InventedTemplateParameterInfo *Info = nullptr; if (D.getContext() == DeclaratorContext::Prototype) { // With concepts we allow 'auto' in function parameters. - if (!SemaRef.getLangOpts().CPlusPlus20 || !Auto || - Auto->getKeyword() != AutoTypeKeyword::Auto) { + if (!SemaRef.getLangOpts().CPlusPlus20 || !IsAutoKeyword) { Error = 0; break; } else if (!SemaRef.getCurScope()->isFunctionDeclarationScope()) { @@ -3426,8 +3426,7 @@ Info = &SemaRef.InventedParameterInfos.back(); } else { // In C++14, generic lambdas allow 'auto' in their parameters. - if (!SemaRef.getLangOpts().CPlusPlus14 || !Auto || - Auto->getKeyword() != AutoTypeKeyword::Auto) { + if (!SemaRef.getLangOpts().CPlusPlus14 || !IsAutoKeyword) { Error = 16; break; } @@ -3505,6 +3504,8 @@ case DeclaratorContext::FunctionalCast: if (isa(Deduced)) break; + if (SemaRef.getLangOpts().CPlusPlus2b && IsAutoKeyword) + break; // auto(x) LLVM_FALLTHROUGH; case DeclaratorContext::TypeName: Error = 15; // Generic diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p5.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p5.cpp --- a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p5.cpp +++ b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p5.cpp @@ -51,8 +51,8 @@ (void)reinterpret_cast(&n); // expected-error{{'auto' not allowed here}} (void)const_cast(n); // expected-error{{'auto' not allowed here}} (void)*(auto*)(&n); // expected-error{{'auto' not allowed here}} - (void)auto(n); // expected-error{{expected expression}} - (void)auto{n}; // expected-error{{expected expression}} + (void)auto(n); // expected-error{{'auto' not allowed here}} + (void)auto{n}; // expected-error{{'auto' not allowed here}} } template class C { }; // expected-error{{'auto' not allowed in template parameter}} diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.type.auto.deduct/p2.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.type.auto.deduct/p2.cpp new file mode 100644 --- /dev/null +++ b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.type.auto.deduct/p2.cpp @@ -0,0 +1,77 @@ +// RUN: %clang_cc1 -std=c++2b -verify %s + +void test_decay() { + int v[3]; + static_assert(__is_same(decltype(auto(v)), int *)); + static_assert(__is_same(decltype(auto{v}), int *)); + static_assert(__is_same(decltype(auto("lit")), char const *)); + static_assert(__is_same(decltype(auto{"lit"}), char const *)); + + int fn(char *); + static_assert(__is_same(decltype(auto(fn)), int (*)(char *))); + static_assert(__is_same(decltype(auto{fn}), int (*)(char *))); + + constexpr long i = 1; + static_assert(__is_same(decltype(i), long const)); + static_assert(__is_same(decltype(auto(1L)), long)); + static_assert(__is_same(decltype(auto{1L}), long)); + static_assert(__is_same(decltype(auto(i)), long)); + static_assert(__is_same(decltype(auto{i}), long)); + + class A { + } a; + + A &lr = a; + A const &lrc = a; + A &&rr = static_cast(a); + A const &&rrc = static_cast(a); + + static_assert(__is_same(decltype(auto(lr)), A)); + static_assert(__is_same(decltype(auto(lrc)), A)); + static_assert(__is_same(decltype(auto(rr)), A)); + static_assert(__is_same(decltype(auto(rrc)), A)); +} + +class cmdline_parser { +public: + cmdline_parser(char const *); + auto add_option(char const *, char const *) && -> cmdline_parser &&; +}; + +void test_rvalue_fluent_interface() { + auto cmdline = cmdline_parser("driver"); + auto internal = auto{cmdline}.add_option("--dump-full", "do not minimize dump"); +} + +template constexpr auto decay_copy(T &&v) { return static_cast(v); } // expected-error {{calling a protected constructor of class 'A'}} + +class A { + int x; + friend void f(A &&); + +public: + A(); + + auto test_access() { + static_assert(__is_same(decltype(auto(*this)), A)); + static_assert(__is_same(decltype(auto(this)), A *)); + + f(A(*this)); // ok + f(auto(*this)); // ok in P0849 + f(decay_copy(*this)); // expected-note {{in instantiation of function template specialization 'decay_copy' requested here}} + } + + auto test_access() const { + static_assert(__is_same(decltype(auto(*this)), A)); // ditto + static_assert(__is_same(decltype(auto(this)), A const *)); + } + +protected: + A(const A &); // expected-note {{declared protected here}} +}; + +// post-C++17 semantics +constexpr struct Uncopyable { + constexpr explicit Uncopyable(int) {} + constexpr Uncopyable(Uncopyable &&) = delete; +} u = auto(Uncopyable(auto(Uncopyable(42)))); diff --git a/clang/test/CXX/expr/expr.post/expr.type.conv/p1-2b.cpp b/clang/test/CXX/expr/expr.post/expr.type.conv/p1-2b.cpp new file mode 100644 --- /dev/null +++ b/clang/test/CXX/expr/expr.post/expr.type.conv/p1-2b.cpp @@ -0,0 +1,39 @@ +// RUN: %clang_cc1 -std=c++2b -verify %s + +template +void foo(T); + +struct A { + int m; + char g(int); + float g(double); +} a{1}; + +// C++2b [dcl.type.auto.deduct]p2.3 +// For an explicit type conversion, T is the specified type, which shall be auto. +void diagnostics() { + foo(auto()); // expected-error {{initializer for functional-style cast to 'auto' is empty}} + foo(auto{}); // expected-error {{initializer for functional-style cast to 'auto' is empty}} + foo(auto({})); // expected-error {{cannot deduce actual type for 'auto' from parenthesized initializer list}} + foo(auto{{}}); // expected-error {{cannot deduce actual type for 'auto' from nested initializer list}} + + // - If the initializer is a parenthesized expression-list, the expression-list shall be a single assignmentexpression and E is the assignment-expression. + foo(auto(a)); + // - If the initializer is a braced-init-list, it shall consist of a single brace-enclosed assignment-expression and E is the assignment-expression. + foo(auto{a}); + foo(auto({a})); // expected-error {{cannot deduce actual type for 'auto' from parenthesized initializer list}} + foo(auto{{a}}); // expected-error {{cannot deduce actual type for 'auto' from nested initializer list}} + + foo(auto(&A::g)); // expected-error {{functional-style cast to 'auto' has incompatible initializer of type ''}} + + foo(auto(a, 3.14)); // expected-error {{initializer for functional-style cast to 'auto' contains multiple expressions}} + foo(auto{a, 3.14}); // expected-error {{initializer for functional-style cast to 'auto' contains multiple expressions}} + foo(auto({a, 3.14})); // expected-error {{cannot deduce actual type for 'auto' from parenthesized initializer list}} + foo(auto{{a, 3.14}}); // expected-error {{cannot deduce actual type for 'auto' from nested initializer list}} + foo(auto({a}, {3.14})); // expected-error {{initializer for functional-style cast to 'auto' contains multiple expressions}} + foo(auto{{a}, {3.14}}); // expected-error {{initializer for functional-style cast to 'auto' contains multiple expressions}} + + foo(auto{1, 2}); // expected-error {{initializer for functional-style cast to 'auto' contains multiple expressions}} + foo(auto({1, 2})); // expected-error {{cannot deduce actual type for 'auto' from parenthesized initializer list}} + foo(auto{{1, 2}}); // expected-error {{cannot deduce actual type for 'auto' from nested initializer list}} +} diff --git a/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx0x.cpp b/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx0x.cpp --- a/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx0x.cpp +++ b/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx0x.cpp @@ -16,7 +16,7 @@ new (auto) (1,2,3); // expected-error{{new expression for type 'auto' contains multiple constructor arguments}} new auto {}; // expected-error{{new expression for type 'auto' requires a constructor argument}} new auto {1,2,3}; // expected-error{{new expression for type 'auto' contains multiple constructor arguments}} - new auto ({1,2,3}); // expected-error{{new expression for type 'auto' contains multiple constructor arguments}} + new auto ({1,2,3}); // expected-error{{cannot deduce actual type for 'auto' from parenthesized initializer list}} } void p2example() { diff --git a/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx14.cpp b/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx14.cpp --- a/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx14.cpp +++ b/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx14.cpp @@ -5,6 +5,6 @@ new auto {2}; // expected-warning {{ISO C++ standards before C++17 do not allow new expression for type 'auto' to use list-initialization}} new auto {1, 2}; // expected-error{{new expression for type 'auto' contains multiple constructor arguments}} new auto {}; // expected-error{{new expression for type 'auto' requires a constructor argument}} - new decltype(auto)({1}); // expected-warning {{ISO C++ standards before C++17 do not allow new expression for type 'decltype(auto)' to use list-initialization}} - new decltype(auto)({1, 2}); // expected-error{{new expression for type 'decltype(auto)' contains multiple constructor arguments}} + new decltype(auto)({1}); // expected-error{{cannot deduce actual type for 'decltype(auto)' from parenthesized initializer list}} + new decltype(auto)({1, 2}); // expected-error{{cannot deduce actual type for 'decltype(auto)' from parenthesized initializer list}} } diff --git a/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx1z.cpp b/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx1z.cpp --- a/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx1z.cpp +++ b/clang/test/CXX/expr/expr.unary/expr.new/p2-cxx1z.cpp @@ -1,11 +1,30 @@ // RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++14 // RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++17 -pedantic +// [expr.new]p2 ... the invented declaration: T x init ; +// C++2b [dcl.type.auto.deduct]p2.2 +// For a variable declared with a type that contains a placeholder type, T is the declared type of the variable. void f() { + // - If the initializer is a parenthesized expression-list, the expression-list shall be a single assignmentexpression and E is the assignment-expression. new auto('a'); - new auto {2}; - new auto {1, 2}; // expected-error{{new expression for type 'auto' contains multiple constructor arguments}} - new auto {}; // expected-error{{new expression for type 'auto' requires a constructor argument}} - new decltype(auto)({1}); - new decltype(auto)({1, 2}); // expected-error{{new expression for type 'decltype(auto)' contains multiple constructor arguments}} + new decltype(auto)('a'); + // - If the initializer is a braced-init-list, it shall consist of a single brace-enclosed assignment-expression and E is the assignment-expression. + new auto{2}; + new decltype(auto){2}; + + new auto{}; // expected-error{{new expression for type 'auto' requires a constructor argument}} + new auto({}); // expected-error{{cannot deduce actual type for 'auto' from parenthesized initializer list}} + new auto{{}}; // expected-error{{cannot deduce actual type for 'auto' from nested initializer list}} + + new auto({2}); // expected-error{{cannot deduce actual type for 'auto' from parenthesized initializer list}} + new auto{{2}}; // expected-error{{cannot deduce actual type for 'auto' from nested initializer list}} + new auto{1, 2}; // expected-error{{new expression for type 'auto' contains multiple constructor arguments}} + + new decltype(auto){}; // expected-error{{new expression for type 'decltype(auto)' requires a constructor argument}} + new decltype(auto)({}); // expected-error{{cannot deduce actual type for 'decltype(auto)' from parenthesized initializer list}} + new decltype(auto){{}}; // expected-error{{cannot deduce actual type for 'decltype(auto)' from nested initializer list}} + + new decltype(auto)({1}); // expected-error{{cannot deduce actual type for 'decltype(auto)' from parenthesized initializer list}} + new decltype(auto){1, 2}; // expected-error{{new expression for type 'decltype(auto)' contains multiple constructor arguments}} + new decltype(auto)({1, 2}); // expected-error{{cannot deduce actual type for 'decltype(auto)' from parenthesized initializer list}} } diff --git a/clang/test/Parser/cxx2b-auto-x.cpp b/clang/test/Parser/cxx2b-auto-x.cpp new file mode 100644 --- /dev/null +++ b/clang/test/Parser/cxx2b-auto-x.cpp @@ -0,0 +1,23 @@ +// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx2b -std=c++2b %s +// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx20 -std=c++20 %s + +void looks_like_decltype_auto() { + decltype(auto(42)) b = 42; // cxx20-error {{'auto' not allowed here}} + decltype(long *) a = 42; // expected-error {{expected '(' for function-style cast or type construction}} \ + expected-error {{expected expression}} + decltype(auto *) a = 42; // expected-error {{expected '(' for function-style cast or type construction}} \ + expected-error {{expected expression}} + decltype(auto()) c = 42; // cxx2b-error {{initializer for functional-style cast to 'auto' is empty}} \ + cxx20-error {{'auto' not allowed here}} +} + +struct looks_like_declaration { + int n; +} a; + +using T = looks_like_declaration *; +void f() { T(&a)->n = 1; } +void g() { auto(&a)->n = 0; } // cxx20-error {{declaration of variable 'a' with deduced type 'auto (&)' requires an initializer}} \ + cxx20-error {{expected ';' at end of declaration}} +void h() { auto{&a}->n = 0; } // cxx20-error {{expected unqualified-id}} \ + cxx20-error {{expected expression}} diff --git a/clang/test/SemaCXX/deduced-return-type-cxx14.cpp b/clang/test/SemaCXX/deduced-return-type-cxx14.cpp --- a/clang/test/SemaCXX/deduced-return-type-cxx14.cpp +++ b/clang/test/SemaCXX/deduced-return-type-cxx14.cpp @@ -638,5 +638,7 @@ using B = auto (*)() -> auto; // expected-error {{'auto' not allowed in type alias}} template auto> struct X {}; // cxx14-error {{'auto' not allowed in template parameter until C++17}} template struct Y { T x; }; - Y auto> y; // expected-error {{'auto' not allowed in template argument}} + Y auto> y; // cxx14_20-error {{'auto' not allowed in template argument}} \ + cxx2b-error {{initializer for functional-style cast to 'auto' is empty}} \ + cxx2b-error {{expected unqualified-id}} } diff --git a/clang/www/cxx_status.html b/clang/www/cxx_status.html --- a/clang/www/cxx_status.html +++ b/clang/www/cxx_status.html @@ -1379,6 +1379,11 @@ P2360R0 Clang 14 + + auto(x): decay-copy in the language + P0849R8 + Clang 14 +