gcc/testsuite/gdc.test/fail_compilation/test15306.d

   1 /*
   2 TEST_OUTPUT:
   3 ---
   4 fail_compilation/test15306.d(15): Error: `immutable` delegate `test15306.main.__dgliteral2` cannot access mutable data `i`
   5 fail_compilation/test15306.d(19): Error: `shared` delegate `test15306.main.__dgliteral5` cannot access non-shared data `p`
   6 ---
   7 */
   8
   9 // https://issues.dlang.org/show_bug.cgi?id=15306
  10
  11 void main()
  12 {
  13     // immutable cannot access mutable
  14     int i = 42;
  15     auto dg1 = delegate void() immutable { auto inner = i; };
  16
  17     // shared cannot access unshared
  18     int* p = &i;
  19     auto dg2 = delegate int() shared { return *p; };
  20     assert(dg2() == i);
  21
  22     // unshared can access shared
  23     shared j = 43;
  24     shared int* q = &j;
  25     auto dg3 = delegate int() { return *q; };
  26     assert(dg2() == j);
  27 }