r288893 - [ObjC++] Don't enter a C++ declarator scope when the current context is
Alex Lorenz via cfe-commits
cfe-commits at lists.llvm.org
Wed Dec 7 02:24:45 PST 2016
Author: arphaman
Date: Wed Dec 7 04:24:44 2016
New Revision: 288893
URL: http://llvm.org/viewvc/llvm-project?rev=288893&view=rev
Log:
[ObjC++] Don't enter a C++ declarator scope when the current context is
an Objective-C declaration
This commit ensures that Sema won't enter a C++ declarator scope when the
current context is an Objective-C declaration. This prevents an assertion
failure in EnterDeclaratorContext that's used to ensure that current context
will be restored correctly after exiting the declarator context.
rdar://20560175
Differential Revision: https://reviews.llvm.org/D26922
Modified:
cfe/trunk/lib/Parse/ParseDecl.cpp
cfe/trunk/lib/Sema/SemaCXXScopeSpec.cpp
cfe/trunk/test/SemaObjCXX/crash.mm
Modified: cfe/trunk/lib/Parse/ParseDecl.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Parse/ParseDecl.cpp?rev=288893&r1=288892&r2=288893&view=diff
==============================================================================
--- cfe/trunk/lib/Parse/ParseDecl.cpp (original)
+++ cfe/trunk/lib/Parse/ParseDecl.cpp Wed Dec 7 04:24:44 2016
@@ -5264,6 +5264,14 @@ void Parser::ParseDirectDeclarator(Decla
// Change the declaration context for name lookup, until this function
// is exited (and the declarator has been parsed).
DeclScopeObj.EnterDeclaratorScope();
+ else if (getObjCDeclContext()) {
+ // Ensure that we don't interpret the next token as an identifier when
+ // dealing with declarations in an Objective-C container.
+ D.SetIdentifier(nullptr, Tok.getLocation());
+ D.setInvalidType(true);
+ ConsumeToken();
+ goto PastIdentifier;
+ }
}
// C++0x [dcl.fct]p14:
Modified: cfe/trunk/lib/Sema/SemaCXXScopeSpec.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaCXXScopeSpec.cpp?rev=288893&r1=288892&r2=288893&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaCXXScopeSpec.cpp (original)
+++ cfe/trunk/lib/Sema/SemaCXXScopeSpec.cpp Wed Dec 7 04:24:44 2016
@@ -1001,6 +1001,11 @@ void Sema::RestoreNestedNameSpecifierAnn
bool Sema::ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS) {
assert(SS.isSet() && "Parser passed invalid CXXScopeSpec.");
+ // Don't enter a declarator context when the current context is an Objective-C
+ // declaration.
+ if (isa<ObjCContainerDecl>(CurContext) || isa<ObjCMethodDecl>(CurContext))
+ return false;
+
NestedNameSpecifier *Qualifier = SS.getScopeRep();
// There are only two places a well-formed program may qualify a
Modified: cfe/trunk/test/SemaObjCXX/crash.mm
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaObjCXX/crash.mm?rev=288893&r1=288892&r2=288893&view=diff
==============================================================================
--- cfe/trunk/test/SemaObjCXX/crash.mm (original)
+++ cfe/trunk/test/SemaObjCXX/crash.mm Wed Dec 7 04:24:44 2016
@@ -25,3 +25,38 @@ template<typename...Ts> void f(Ts); // e
// expected-warning at -2 {{variadic templates are a C++11 extension}}
#endif
@end
+
+// rdar://20560175
+
+struct OuterType {
+ typedef int InnerType;
+};
+
+namespace ns {
+ typedef int InnerType;
+};
+
+ at protocol InvalidProperties
+
+ at property (nonatomic) (OuterType::InnerType) invalidTypeParens;
+// expected-error at -1 {{type name requires a specifier or qualifier}}
+// expected-error at -2 {{property requires fields to be named}}
+// expected-error at -3 {{expected ';' at end of declaration list}}
+// expected-error at -4 {{C++ requires a type specifier for all declarations}}
+// expected-error at -5 {{cannot declare variable inside @interface or @protocol}}
+
+ at property (nonatomic) (ns::InnerType) invalidTypeParens2;
+// expected-error at -1 {{type name requires a specifier or qualifier}}
+// expected-error at -2 {{property requires fields to be named}}
+// expected-error at -3 {{expected ';' at end of declaration list}}
+// expected-error at -4 {{C++ requires a type specifier for all declarations}}
+// expected-error at -5 {{cannot declare variable inside @interface or @protocol}}
+
+ at property (nonatomic) int OuterType::InnerType; // expected-error {{property requires fields to be named}}
+
+ at property (nonatomic) int OuterType::InnerType foo; // expected-error {{property requires fields to be named}}
+// expected-error at -1 {{expected ';' at end of declaration list}}
+// expected-error at -2 {{C++ requires a type specifier for all declarations}}
+// expected-error at -3 {{cannot declare variable inside @interface or @protocol}}
+
+ at end
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