libcxx/test/std/utilities/intseq/intseq.make/make_integer_seq.verify.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <utility>
  10
  11 // template<class T, T N>
  12 //   using make_integer_sequence = integer_sequence<T, 0, 1, ..., N-1>;
  13
  14 // UNSUPPORTED: c++03, c++11
  15
  16 // This test hangs during recursive template instantiation with libstdc++
  17 // UNSUPPORTED: stdlib=libstdc++
  18
  19 #include <utility>
  20
  21 #include "test_macros.h"
  22
  23 typedef std::make_integer_sequence<int, -3> MakeSeqT;
  24
  25 // std::make_integer_sequence is implemented using a compiler builtin if available.
  26 // this builtin has different diagnostic messages than the fallback implementation.
  27 #if TEST_HAS_BUILTIN(__make_integer_seq)
  28 MakeSeqT i; // expected-error@*:* {{integer sequences must have non-negative sequence length}}
  29 #else
  30 MakeSeqT i; // expected-error-re@*:* {{static assertion failed{{.*}}std::make_integer_sequence must have a non-negative sequence length}}
  31 #endif