Disambiguation of '[[':
* In C++11, '[[' is ill-formed unless it starts an attribute-specifier. Reject
array sizes and array indexes which begin with a lambda-expression. Recover by
parsing the lambda as a lambda.
* In Objective-C++11, either '[' could be the start of a message-send.
Fully disambiguate this case: it turns out that the grammars of message-sends,
lambdas and attributes do not actually overlap. Accept any occurrence of '[['
where either '[' starts a message send, but reject a lambda in an array index
just like in C++11 mode.
Implement a couple of changes to the attribute wording which occurred after our
attributes implementation landed:
* In a function-declaration, the attributes go after the exception specification,
not after the right paren.
* A reference type can have attributes applied.
* An 'identifier' in an attribute can also be a keyword. Support for alternative
tokens (iso646 keywords) in attributes to follow.
And some bug fixes:
* Parse attributes after declarator-ids, even if they are not simple identifiers.
* Do not accept attributes after a parenthesized declarator.
* Accept attributes after an array size in a new-type-id.
* Partially disamiguate 'delete' followed by a lambda. More work is required
here for the case where the lambda-introducer is '[]'.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154369 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/cxx0x-attributes.cpp b/test/Parser/cxx0x-attributes.cpp
index 198da77..b208735 100644
--- a/test/Parser/cxx0x-attributes.cpp
+++ b/test/Parser/cxx0x-attributes.cpp
@@ -5,11 +5,17 @@
int [[]] between_attr;
int after_attr [[]];
int * [[]] ptr_attr;
+int & [[]] ref_attr = after_attr;
+int && [[]] rref_attr = 0;
int array_attr [1] [[]];
alignas(8) int aligned_attr;
[[test::valid(for 42 [very] **** '+' symbols went on a trip; the end.)]]
int garbage_attr;
void fn_attr () [[]];
+void noexcept_fn_attr () noexcept [[]];
+struct MemberFnOrder {
+ virtual void f() const volatile && noexcept [[]] final = 0;
+};
class [[]] class_attr {};
extern "C++" [[]] int extern_attr;
template <typename T> [[]] void template_attr ();
@@ -17,10 +23,10 @@
int comma_attr [[,]]; // expected-error {{expected identifier}}
int scope_attr [[foo::]]; // expected-error {{expected identifier}}
+int (paren_attr) [[]]; // expected-error {{an attribute list cannot appear here}}
unsigned [[]] int attr_in_decl_spec; // expected-error {{expected unqualified-id}}
-int & [[]] ref_attr = after_attr; // expected-error {{an attribute list cannot appear here}}
class foo {
- void after_const_attr () const [[]]; // expected-error {{expected body of lambda expression}}
+ void const_after_attr () [[]] const; // expected-error {{expected ';'}}
};
extern "C++" [[]] { } // expected-error {{an attribute list cannot appear here}}
[[]] template <typename T> void before_template_attr (); // expected-error {{an attribute list cannot appear here}}
@@ -58,6 +64,9 @@
[[]] try {
} [[]] catch (...) { // expected-error {{an attribute list cannot appear here}}
}
-
+ struct S { int arr[2]; } s;
+ (void)s.arr[ [] { return 0; }() ]; // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}}
+ int n = __builtin_offsetof(S, arr[ [] { return 0; }() ]); // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}}
+
[[]] return;
}