gcc/testsuite/g++.dg/cpp1z/lambda-this3.C

// { dg-do compile { target c++17 } }

struct S {
  int i;
  constexpr S() : i(5) { 
    ([*this] () { return i + 10; }());
  }
  constexpr operator int() const { return i; }
};
constexpr int x = S();