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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
33 lines
1.1 KiB
C++
33 lines
1.1 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s -triple=i686-pc-linux-gnu -std=c++11
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using size_t = decltype(sizeof(0));
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struct noreturn_t {} constexpr noreturn = {};
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void *operator new [[noreturn]] (size_t, noreturn_t);
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void operator delete [[noreturn]] (void*, noreturn_t);
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void good_news()
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{
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auto p = new int[2][[]];
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auto q = new int[[]][2];
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auto r = new int*[[]][2][[]];
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auto s = new (int(*[[]])[2][[]]);
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}
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void bad_news(int *ip)
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{
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// attribute-specifiers can go almost anywhere in a new-type-id...
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auto r = new int[[]{return 1;}()][2]; // expected-error {{expected ']'}}
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auto s = new int*[[]{return 1;}()][2]; // expected-error {{expected ']'}}
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// ... but not here:
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auto t = new (int(*)[[]]); // expected-error {{an attribute list cannot appear here}}
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auto u = new (int(*)[[]{return 1;}()][2]); // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}} expected-error {{variably modified type}}
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}
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void good_deletes()
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{
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delete [&]{ return (int*)0; }();
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// FIXME: This appears to be legal.
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delete []{ return (int*)0; }(); // unexpected-error {{expected expression}}
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}
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