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73c3c21fae
Rather than attempting to compare whether the previous and current top of context stack are "equal" (which fails for a number of reasons, such as the context stack entries containing pointers to objects on the stack, or reaching the same "top of stack" entry through two different paths), track the depth of context stack at which we last emitted a note and invalidate it when we pop the context stack to less than that depth. This causes us to emit some missing "in instantiation of" notes and to stop emitting redundant "in instantiation of" stacks matching the previous stack in rare cases. llvm-svn: 295921
54 lines
2.8 KiB
C++
54 lines
2.8 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
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static_assert(__has_builtin(__make_integer_seq), "");
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template <class T, T... I>
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struct Seq {
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static constexpr T PackSize = sizeof...(I);
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};
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template <typename T, T N>
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using MakeSeq = __make_integer_seq<Seq, T, N>;
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static_assert(__is_same(MakeSeq<int, 0>, Seq<int>), "");
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static_assert(__is_same(MakeSeq<int, 1>, Seq<int, 0>), "");
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static_assert(__is_same(MakeSeq<int, 2>, Seq<int, 0, 1>), "");
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static_assert(__is_same(MakeSeq<int, 3>, Seq<int, 0, 1, 2>), "");
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static_assert(__is_same(MakeSeq<int, 4>, Seq<int, 0, 1, 2, 3>), "");
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static_assert(__is_same(MakeSeq<unsigned int, 0U>, Seq<unsigned int>), "");
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static_assert(__is_same(MakeSeq<unsigned int, 1U>, Seq<unsigned int, 0U>), "");
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static_assert(__is_same(MakeSeq<unsigned int, 2U>, Seq<unsigned int, 0U, 1U>), "");
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static_assert(__is_same(MakeSeq<unsigned int, 3U>, Seq<unsigned int, 0U, 1U, 2U>), "");
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static_assert(__is_same(MakeSeq<unsigned int, 4U>, Seq<unsigned int, 0U, 1U, 2U, 3U>), "");
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static_assert(__is_same(MakeSeq<long long, 0LL>, Seq<long long>), "");
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static_assert(__is_same(MakeSeq<long long, 1LL>, Seq<long long, 0LL>), "");
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static_assert(__is_same(MakeSeq<long long, 2LL>, Seq<long long, 0LL, 1LL>), "");
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static_assert(__is_same(MakeSeq<long long, 3LL>, Seq<long long, 0LL, 1LL, 2LL>), "");
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static_assert(__is_same(MakeSeq<long long, 4LL>, Seq<long long, 0LL, 1LL, 2LL, 3LL>), "");
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static_assert(__is_same(MakeSeq<unsigned long long, 0ULL>, Seq<unsigned long long>), "");
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static_assert(__is_same(MakeSeq<unsigned long long, 1ULL>, Seq<unsigned long long, 0ULL>), "");
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static_assert(__is_same(MakeSeq<unsigned long long, 2ULL>, Seq<unsigned long long, 0ULL, 1ULL>), "");
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static_assert(__is_same(MakeSeq<unsigned long long, 3ULL>, Seq<unsigned long long, 0ULL, 1ULL, 2ULL>), "");
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static_assert(__is_same(MakeSeq<unsigned long long, 4ULL>, Seq<unsigned long long, 0ULL, 1ULL, 2ULL, 3ULL>), "");
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template <typename T, T N>
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using ErrorSeq = __make_integer_seq<Seq, T, N>; // expected-error{{must have non-negative sequence length}} \
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expected-error{{must have integral element type}}
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enum Color : int { Red,
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Green,
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Blue };
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using illformed1 = ErrorSeq<Color, Blue>; // expected-note{{in instantiation}}
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using illformed2 = ErrorSeq<int, -5>; // expected-note{{in instantiation}}
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template <typename T, T N> void f() {}
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__make_integer_seq<f, int, 0> x; // expected-error{{template template parameter must be a class template or type alias template}}
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__make_integer_seq<__make_integer_seq, int, 10> PR28494; // expected-error{{different template parameters}}
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// expected-note@make_integer_seq.cpp:* {{template parameter has a different kind}}
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// expected-note@make_integer_seq.cpp:* {{previous template template parameter is here}}
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