clang/test/SemaCXX/constexpr-single-element-array.cpp

   1 // RUN: %clang_cc1 -std=c++20 -verify %s
   2 // RUN: %clang_cc1 -std=c++20 -verify -fexperimental-new-constant-interpreter %s
   3
   4
   5 // This test makes sure that a single element array doesn't produce
   6 // spurious errors during constexpr evaluation.
   7
   8 // expected-no-diagnostics
   9 struct Sub { int x; };
  10
  11 struct S {
  12   constexpr S() { Arr[0] = Sub{}; }
  13   Sub Arr[1];
  14 };
  15
  16 constexpr bool test() {
  17   S s;
  18   return true;
  19 }
  20
  21 static_assert(test());