gcc/testsuite/gdc.test/fail_compilation/fail3882.d

   1 // REQUIRED_ARGS: -w
   2 // PERMUTE_ARGS: -debug
   3
   4 /******************************************/
   5 // https://issues.dlang.org/show_bug.cgi?id=3882
   6
   7 /*
   8 TEST_OUTPUT:
   9 ---
  10 fail_compilation/fail3882.d(23): Warning: calling `fail3882.strictlyPure!int.strictlyPure` without side effects discards return value of type `int`; prepend a `cast(void)` if intentional
  11 fail_compilation/fail3882.d(27): Warning: calling `fp` without side effects discards return value of type `int`; prepend a `cast(void)` if intentional
  12 ---
  13 */
  14
  15 @safe pure nothrow T strictlyPure(T)(T x)
  16 {
  17     return x*x;
  18 }
  19
  20 void main()
  21 {
  22     int x = 3;
  23     strictlyPure(x);
  24
  25     // https://issues.dlang.org/show_bug.cgi?id=12649
  26     auto fp = &strictlyPure!int;
  27     fp(x);
  28 }
  29
  30 /******************************************/
  31 // bugfix in TypeFunction::purityLevel
  32
  33 /*
  34 TEST_OUTPUT:
  35 ---
  36 fail_compilation/fail3882.d(48): Warning: calling `fail3882.f1` without side effects discards return value of type `int`; prepend a `cast(void)` if intentional
  37 fail_compilation/fail3882.d(49): Warning: calling `fail3882.f2` without side effects discards return value of type `int`; prepend a `cast(void)` if intentional
  38 Error: warnings are treated as errors
  39        Use -wi if you wish to treat warnings only as informational.
  40 ---
  41 */
  42
  43 nothrow pure int f1(immutable(int)[] a) { return 0; }
  44 nothrow pure int f2(immutable(int)*  p) { return 0; }
  45
  46 void test_bug()
  47 {
  48     f1([]);
  49     f2(null);
  50 }