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7bdcc4a9da
* 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 '[]'. llvm-svn: 154369
73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 %s
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// Declaration syntax checks
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[[]] int before_attr;
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int [[]] between_attr;
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int after_attr [[]];
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int * [[]] ptr_attr;
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int & [[]] ref_attr = after_attr;
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int && [[]] rref_attr = 0;
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int array_attr [1] [[]];
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alignas(8) int aligned_attr;
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[[test::valid(for 42 [very] **** '+' symbols went on a trip; the end.)]]
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int garbage_attr;
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void fn_attr () [[]];
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void noexcept_fn_attr () noexcept [[]];
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struct MemberFnOrder {
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virtual void f() const volatile && noexcept [[]] final = 0;
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};
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class [[]] class_attr {};
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extern "C++" [[]] int extern_attr;
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template <typename T> [[]] void template_attr ();
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[[]] [[]] int [[]] [[]] multi_attr [[]] [[]];
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int comma_attr [[,]]; // expected-error {{expected identifier}}
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int scope_attr [[foo::]]; // expected-error {{expected identifier}}
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int (paren_attr) [[]]; // expected-error {{an attribute list cannot appear here}}
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unsigned [[]] int attr_in_decl_spec; // expected-error {{expected unqualified-id}}
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class foo {
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void const_after_attr () [[]] const; // expected-error {{expected ';'}}
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};
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extern "C++" [[]] { } // expected-error {{an attribute list cannot appear here}}
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[[]] template <typename T> void before_template_attr (); // expected-error {{an attribute list cannot appear here}}
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[[]] namespace ns { int i; } // expected-error {{an attribute list cannot appear here}} expected-note {{declared here}}
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[[]] static_assert(true, ""); //expected-error {{an attribute list cannot appear here}}
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[[]] asm(""); // expected-error {{an attribute list cannot appear here}}
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[[]] using ns::i; // expected-error {{an attribute list cannot appear here}}
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[[]] using namespace ns;
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// Argument tests
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alignas int aligned_no_params; // expected-error {{expected '('}}
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alignas(i) int aligned_nonconst; // expected-error {{'aligned' attribute requires integer constant}} expected-note {{read of non-const variable 'i'}}
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// Statement tests
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void foo () {
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[[]] ;
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[[]] { }
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[[]] if (0) { }
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[[]] for (;;);
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[[]] do {
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[[]] continue;
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} while (0);
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[[]] while (0);
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[[]] switch (i) {
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[[]] case 0:
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[[]] default:
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[[]] break;
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}
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[[]] goto there;
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[[]] there:
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[[]] try {
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} [[]] catch (...) { // expected-error {{an attribute list cannot appear here}}
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}
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struct S { int arr[2]; } s;
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(void)s.arr[ [] { return 0; }() ]; // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}}
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int n = __builtin_offsetof(S, arr[ [] { return 0; }() ]); // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}}
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[[]] return;
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}
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