gcc/testsuite/gdc.test/fail_compilation/fail20183.d

   1 /* REQUIRED_ARGS: -preview=dip1000
   2 TEST_OUTPUT:
   3 ---
   4 fail_compilation/fail20183.d(1016): Error: function `fail20183.addr(return ref int b)` is not callable using argument types `(int)`
   5 fail_compilation/fail20183.d(1016):        cannot pass rvalue argument `S(0).i` of type `int` to parameter `return ref int b`
   6 fail_compilation/fail20183.d(1017): Error: address of struct temporary returned by `s()` assigned to longer lived variable `q`
   7 ---
   8  */
   9
  10 #line 1000
  11
  12 // https://issues.dlang.org/show_bug.cgi?id=20183
  13
  14 @safe:
  15
  16 int* addr(return ref int b) { return &b; }
  17
  18 struct S
  19 {
  20     int i;
  21 }
  22
  23 S s() { return S(); }
  24
  25 void test()
  26 {
  27     int* p = addr(S().i);  // struct literal
  28     int* q = addr(s().i);  // struct temporary
  29 }
  30
  31 /*
  32 TEST_OUTPUT:
  33 ---
  34 fail_compilation/fail20183.d(1107): Error: address of struct temporary returned by `s()` assigned to longer lived variable `this.ptr`
  35 ---
  36  */
  37 #line 1100
  38
  39 class Foo
  40 {
  41     int* ptr;
  42
  43     this() @safe
  44     {
  45         ptr = addr(s().i);  // struct literal
  46     }
  47 }