Viewing file:  elide1.C (1.05 KB) -rw-r--r--
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// { dg-do run }
// Test that the destructor for a temporary passed by value isn't run
// until end of full-expression, as per [class.copy]:
// Whenever a temporary class object is copied using a copy constructor,
// and this object and the copy have the same cv-unqualified type, an
// implementation is permitted to treat the original and the copy as two
// different ways of referring to the same object and not perform a copy
// at all, even if the class copy constructor or destructor have side
// effects.... In these cases, the
// object is destroyed at the later of times when the original and the
// copy would have been destroyed without the optimization.
// Here, the temporary would be destroyed later than the parm, so either we
// must suppress the optimization in this case or destroy value parms in the
// caller.
int d;
struct A {
A () { }
A (const A&) { }
~A() { ++d; }
};
void f (A a) { }
int main ()
{
int r;
f (A ()), r = d;
if (r < d && d)
return 0;
else
return 1;
}
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