forked from OSchip/llvm-project
48 lines
2.4 KiB
C++
48 lines
2.4 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
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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>;
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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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