64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
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// rdar://13784901
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struct S0 {
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int x;
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static const int test0 = __alignof__(x); // expected-error {{invalid application of 'alignof' to a field of a class still being defined}}
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static const int test1 = __alignof__(S0::x); // expected-error {{invalid application of 'alignof' to a field of a class still being defined}}
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auto test2() -> char(&)[__alignof__(x)]; // expected-error {{invalid application of 'alignof' to a field of a class still being defined}}
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};
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struct S1; // expected-note 6 {{forward declaration}}
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extern S1 s1;
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const int test3 = __alignof__(s1); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}}
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struct S2 {
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S2();
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S1 &s;
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int x;
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int test4 = __alignof__(x); // ok
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int test5 = __alignof__(s); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}}
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};
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const int test6 = __alignof__(S2::x);
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const int test7 = __alignof__(S2::s); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}}
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// Arguably, these should fail like the S1 cases do: the alignment of
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// 's2.x' should depend on the alignment of both x-within-S2 and
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// s2-within-S3 and thus require 'S3' to be complete. If we start
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// doing the appropriate recursive walk to do that, we should make
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// sure that these cases don't explode.
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struct S3 {
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S2 s2;
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static const int test8 = __alignof__(s2.x);
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static const int test9 = __alignof__(s2.s); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}}
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auto test10() -> char(&)[__alignof__(s2.x)];
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static const int test11 = __alignof__(S3::s2.x);
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static const int test12 = __alignof__(S3::s2.s); // expected-error {{invalid application of 'alignof' to an incomplete type 'S1'}}
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auto test13() -> char(&)[__alignof__(s2.x)];
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};
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// Same reasoning as S3.
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struct S4 {
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union {
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int x;
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};
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static const int test0 = __alignof__(x);
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static const int test1 = __alignof__(S0::x);
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auto test2() -> char(&)[__alignof__(x)];
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};
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// Regression test for asking for the alignment of a field within an invalid
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// record.
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struct S5 {
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S1 s; // expected-error {{incomplete type}}
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int x;
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};
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const int test8 = __alignof__(S5::x);
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long long int test14[2];
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static_assert(alignof(test14) == 8, "foo"); // expected-warning {{'alignof' applied to an expression is a GNU extension}}
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