libphobos/testsuite/libphobos.exceptions/future_message.d

   1 // { dg-options "-Wno-deprecated" }
   2 import core.stdc.stdio;
   3
   4 // Make sure basic stuff works with future Throwable.message
   5 class NoMessage : Throwable
   6 {
   7     @nogc @safe pure nothrow this(string msg, Throwable next = null)
   8     {
   9         super(msg, next);
  10     }
  11 }
  12
  13 class WithMessage : Throwable
  14 {
  15     @nogc @safe pure nothrow this(string msg, Throwable next = null)
  16     {
  17         super(msg, next);
  18     }
  19
  20     override const(char)[] message() const
  21     {
  22         return "I have a custom message.";
  23     }
  24 }
  25
  26 class WithMessageNoOverride : Throwable
  27 {
  28     @nogc @safe pure nothrow this(string msg, Throwable next = null)
  29     {
  30         super(msg, next);
  31     }
  32
  33     const(char)[] message() const
  34     {
  35         return "I have a custom message and no override.";
  36     }
  37 }
  38
  39 class WithMessageNoOverrideAndDifferentSignature : Throwable
  40 {
  41     @nogc @safe pure nothrow this(string msg, Throwable next = null)
  42     {
  43         super(msg, next);
  44     }
  45
  46     immutable(char)[] message()
  47     {
  48         return "I have a custom message and I'm nothing like Throwable.message.";
  49     }
  50 }
  51
  52 void test(Throwable t)
  53 {
  54     try
  55     {
  56         throw t;
  57     }
  58     catch (Throwable e)
  59     {
  60         fprintf(stderr, "%.*s ", cast(int)e.message.length, e.message.ptr);
  61     }
  62 }
  63
  64 void main()
  65 {
  66      test(new NoMessage("exception"));
  67      test(new WithMessage("exception"));
  68      test(new WithMessageNoOverride("exception"));
  69      test(new WithMessageNoOverrideAndDifferentSignature("exception"));
  70      fprintf(stderr, "\n");
  71 }