68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
/* A class that sets a boolean when an object of the class gets destroyed.
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*/
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struct S {
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S(bool *freed) : freed(freed) {}
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~S();
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bool *freed;
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};
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/* S destructor.
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*
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* Set the boolean, a pointer to which was passed to the constructor.
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*/
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S::~S()
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{
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*freed = true;
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}
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/* Construct an isl::id with an S object attached that sets *freed
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* when it gets destroyed.
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*/
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static isl::id construct_id(isl::ctx ctx, bool *freed)
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{
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auto s = std::make_shared<S>(freed);
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isl::id id(ctx, "S", s);
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return id;
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}
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/* Test id::try_user.
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*
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* In particular, check that the object attached to an identifier
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* can be retrieved again, that trying to retrieve an object of the wrong type
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* or trying to retrieve an object when no object was attached fails.
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* Furthermore, check that the object attached to an identifier
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* gets properly freed.
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*/
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static void test_try_user(isl::ctx ctx)
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{
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isl::id id(ctx, "test", 5);
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isl::id id2(ctx, "test2");
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auto maybe_int = id.try_user<int>();
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auto maybe_s = id.try_user<std::shared_ptr<S>>();
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auto maybe_int2 = id2.try_user<int>();
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if (!maybe_int)
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die("integer cannot be retrieved from isl::id");
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if (maybe_int.value() != 5)
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die("wrong integer retrieved from isl::id");
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if (maybe_s)
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die("structure unexpectedly retrieved from isl::id");
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if (maybe_int2)
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die("integer unexpectedly retrieved from isl::id");
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bool freed = false;
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{
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isl::id id = construct_id(ctx, &freed);
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if (freed)
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die("data structure freed prematurely");
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auto maybe_s = id.try_user<std::shared_ptr<S>>();
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if (!maybe_s)
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die("structure cannot be retrieved from isl::id");
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if (maybe_s.value()->freed != &freed)
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die("invalid structure retrieved from isl::id");
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}
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if (!freed)
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die("data structure not freed");
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}
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