96 lines
1.7 KiB
D
96 lines
1.7 KiB
D
// { dg-options "-fpreview=dip1008" }
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class E : Exception
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{
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static int instances;
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this(string msg = "")
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{
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super(msg);
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instances++;
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}
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~this()
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{
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instances--;
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}
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}
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void main()
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{
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alias chain = Exception.chainTogether;
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assert(chain(null, null) is null);
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try
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{
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throw new E();
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}
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catch (E e)
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{
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assert(E.instances == 1);
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assert(e.refcount == 2);
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}
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assert(E.instances == 0);
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try
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{
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throw new E();
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}
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catch (E e)
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{
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assert(chain(null, e) is e);
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assert(e.refcount == 2); // "Owned by e" + 1
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}
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assert(E.instances == 0);
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try
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{
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throw new E();
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}
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catch (E e)
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{
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assert(chain(e, null) is e);
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assert(e.refcount == 2); // "Owned by e" + 1
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}
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assert(E.instances == 0);
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try
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{
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throw new E("first");
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}
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catch (E first)
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{
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try
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{
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throw new E("second");
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}
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catch (E second)
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{
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try
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{
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throw new E("third");
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}
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catch (E third)
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{
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assert(chain(first, second) is first);
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assert(first.next is second);
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assert(second.next is null);
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assert(chain(first, third) is first);
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assert(first.next is second);
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assert(second.next is third);
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assert(third.next is null);
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assert(first.refcount == 2);
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assert(second.refcount == 3);
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assert(third.refcount == 3);
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}
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}
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assert(E.instances == 3);
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}
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assert(E.instances == 0);
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}
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