lichray updated this revision to Diff 387017.
lichray added a comment.
- Manually adjust auto{x} formatting
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D113393/new/
https://reviews.llvm.org/D113393
Files:
clang/docs/ReleaseNotes.rst
clang/include/clang/Basic/DiagnosticSemaKinds.td
clang/lib/Parse/ParseDeclCXX.cpp
clang/lib/Parse/ParseExpr.cpp
clang/lib/Parse/ParseExprCXX.cpp
clang/lib/Parse/ParseTentative.cpp
clang/lib/Sema/SemaExprCXX.cpp
clang/lib/Sema/SemaType.cpp
clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p5.cpp
clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.type.auto.deduct/p2.cpp
clang/test/CXX/expr/expr.post/expr.type.conv/p1-2b.cpp
clang/test/CXX/expr/expr.unary/expr.new/p2-cxx0x.cpp
clang/test/CXX/expr/expr.unary/expr.new/p2-cxx14.cpp
clang/test/CXX/expr/expr.unary/expr.new/p2-cxx1z.cpp
clang/test/Parser/cxx2b-auto-x.cpp
clang/test/SemaCXX/deduced-return-type-cxx14.cpp
clang/www/cxx_status.html
Index: clang/www/cxx_status.html
===================================================================
--- clang/www/cxx_status.html
+++ clang/www/cxx_status.html
@@ -1379,6 +1379,11 @@
<td><a href="https://wg21.link/P2360R0";>P2360R0</a></td>
<td class="unreleased" align="center">Clang 14</td>
</tr>
+ <tr>
+ <td>auto(x): decay-copy in the language</td>
+ <td><a href="https://wg21.link/P0849R8";>P0849R8</a></td>
+ <td class="unreleased" align="center">Clang 14</td>
+ </tr>
</table>
</details>
Index: clang/test/SemaCXX/deduced-return-type-cxx14.cpp
===================================================================
--- clang/test/SemaCXX/deduced-return-type-cxx14.cpp
+++ 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 (*)() -> auto> struct X {}; // cxx14-error {{'auto' not allowed in template parameter until C++17}}
template<typename T> struct Y { T x; };
- Y<auto() -> auto> y; // expected-error {{'auto' not allowed in template argument}}
+ Y<auto() -> 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}}
}
Index: clang/test/Parser/cxx2b-auto-x.cpp
===================================================================
--- /dev/null
+++ 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}}
Index: clang/test/CXX/expr/expr.unary/expr.new/p2-cxx1z.cpp
===================================================================
--- clang/test/CXX/expr/expr.unary/expr.new/p2-cxx1z.cpp
+++ 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}}
}
Index: clang/test/CXX/expr/expr.unary/expr.new/p2-cxx14.cpp
===================================================================
--- clang/test/CXX/expr/expr.unary/expr.new/p2-cxx14.cpp
+++ 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}}
}
Index: clang/test/CXX/expr/expr.unary/expr.new/p2-cxx0x.cpp
===================================================================
--- clang/test/CXX/expr/expr.unary/expr.new/p2-cxx0x.cpp
+++ 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() {
Index: clang/test/CXX/expr/expr.post/expr.type.conv/p1-2b.cpp
===================================================================
--- /dev/null
+++ 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 <class T>
+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 '<overloaded function 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}}
+}
Index: clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.type.auto.deduct/p2.cpp
===================================================================
--- /dev/null
+++ 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);
+ A const &&rrc = static_cast<A &&>(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 <class T> constexpr auto decay_copy(T &&v) { return static_cast<T &&>(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<A &>' 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))));
Index: clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p5.cpp
===================================================================
--- clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p5.cpp
+++ clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p5.cpp
@@ -51,8 +51,8 @@
(void)reinterpret_cast<auto*>(&n); // expected-error{{'auto' not allowed here}}
(void)const_cast<auto>(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 <auto a = 10> class C { }; // expected-error{{'auto' not allowed in template parameter}}
Index: clang/lib/Sema/SemaType.cpp
===================================================================
--- clang/lib/Sema/SemaType.cpp
+++ 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<DeducedTemplateSpecializationType>(Deduced))
break;
+ if (SemaRef.getLangOpts().CPlusPlus2b && IsAutoKeyword)
+ break; // auto(x)
LLVM_FALLTHROUGH;
case DeclaratorContext::TypeName:
Error = 15; // Generic
Index: clang/lib/Sema/SemaExprCXX.cpp
===================================================================
--- clang/lib/Sema/SemaExprCXX.cpp
+++ 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<DeducedTemplateSpecializationType>(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<InitListExpr>(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<InitListExpr>(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<InitListExpr>(Inits[0])) {
- Inits = p->getInits();
- NumInits = p->getNumInits();
- Braced = true;
- }
+ if (Braced) {
+ auto *ILE = cast<InitListExpr>(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<InitListExpr>(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)
Index: clang/lib/Parse/ParseTentative.cpp
===================================================================
--- clang/lib/Parse/ParseTentative.cpp
+++ 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))
Index: clang/lib/Parse/ParseExprCXX.cpp
===================================================================
--- clang/lib/Parse/ParseExprCXX.cpp
+++ 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;
Index: clang/lib/Parse/ParseExpr.cpp
===================================================================
--- clang/lib/Parse/ParseExpr.cpp
+++ 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:
Index: clang/lib/Parse/ParseDeclCXX.cpp
===================================================================
--- clang/lib/Parse/ParseDeclCXX.cpp
+++ 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
Index: clang/include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -2324,13 +2324,20 @@
"type %0 to use list-initialization">, InGroup<CXX17>;
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<
Index: clang/docs/ReleaseNotes.rst
===================================================================
--- clang/docs/ReleaseNotes.rst
+++ clang/docs/ReleaseNotes.rst
@@ -153,6 +153,8 @@
^^^^^^^^^^^^^^^^^^^^^
- Implemented `P1938R3: if consteval <https://wg21.link/P1938R3>`_.
- Implemented `P2360R0: Extend init-statement to allow alias-declaration <https://wg21.link/P2360R0>`_.
+- Implemented `P0849R8: auto(x): decay-copy in the language
+ <https://wg21.link/P0849R8>`_.
CUDA Language Changes in Clang
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