1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s 2 3 static_assert(__has_builtin(__make_integer_seq), ""); 4 5 template <class T, T... I> 6 struct Seq { 7 static constexpr T PackSize = sizeof...(I); 8 }; 9 10 template <typename T, T N> 11 using MakeSeq = __make_integer_seq<Seq, T, N>; 12 13 static_assert(__is_same(MakeSeq<int, 0>, Seq<int>), ""); 14 static_assert(__is_same(MakeSeq<int, 1>, Seq<int, 0>), ""); 15 static_assert(__is_same(MakeSeq<int, 2>, Seq<int, 0, 1>), ""); 16 static_assert(__is_same(MakeSeq<int, 3>, Seq<int, 0, 1, 2>), ""); 17 static_assert(__is_same(MakeSeq<int, 4>, Seq<int, 0, 1, 2, 3>), ""); 18 19 static_assert(__is_same(MakeSeq<unsigned int, 0U>, Seq<unsigned int>), ""); 20 static_assert(__is_same(MakeSeq<unsigned int, 1U>, Seq<unsigned int, 0U>), ""); 21 static_assert(__is_same(MakeSeq<unsigned int, 2U>, Seq<unsigned int, 0U, 1U>), ""); 22 static_assert(__is_same(MakeSeq<unsigned int, 3U>, Seq<unsigned int, 0U, 1U, 2U>), ""); 23 static_assert(__is_same(MakeSeq<unsigned int, 4U>, Seq<unsigned int, 0U, 1U, 2U, 3U>), ""); 24 25 static_assert(__is_same(MakeSeq<long long, 0LL>, Seq<long long>), ""); 26 static_assert(__is_same(MakeSeq<long long, 1LL>, Seq<long long, 0LL>), ""); 27 static_assert(__is_same(MakeSeq<long long, 2LL>, Seq<long long, 0LL, 1LL>), ""); 28 static_assert(__is_same(MakeSeq<long long, 3LL>, Seq<long long, 0LL, 1LL, 2LL>), ""); 29 static_assert(__is_same(MakeSeq<long long, 4LL>, Seq<long long, 0LL, 1LL, 2LL, 3LL>), ""); 30 31 static_assert(__is_same(MakeSeq<unsigned long long, 0ULL>, Seq<unsigned long long>), ""); 32 static_assert(__is_same(MakeSeq<unsigned long long, 1ULL>, Seq<unsigned long long, 0ULL>), ""); 33 static_assert(__is_same(MakeSeq<unsigned long long, 2ULL>, Seq<unsigned long long, 0ULL, 1ULL>), ""); 34 static_assert(__is_same(MakeSeq<unsigned long long, 3ULL>, Seq<unsigned long long, 0ULL, 1ULL, 2ULL>), ""); 35 static_assert(__is_same(MakeSeq<unsigned long long, 4ULL>, Seq<unsigned long long, 0ULL, 1ULL, 2ULL, 3ULL>), ""); 36 37 template <typename T, T N> 38 using ErrorSeq = __make_integer_seq<Seq, T, N>; // expected-error{{must have non-negative sequence length}} \ 39 expected-error{{must have integral element type}} 40 41 enum Color : int { Red, 42 Green, 43 Blue }; 44 using illformed1 = ErrorSeq<Color, Blue>; // expected-note{{in instantiation}} 45 46 using illformed2 = ErrorSeq<int, -5>; 47 48 template <typename T, T N> void f() {} 49 __make_integer_seq<f, int, 0> x; // expected-error{{template template parameter must be a class template or type alias template}} 50
