Viewing file:  not_special.C (1.13 KB) -rw-r--r--
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// I, Howard Hinnant, hereby place this code in the public domain.
// Test that move constructor and move assignement are special.
// That is, their presence should cause compiler declared
// copy ctor or assignment to be deleted.
// { dg-do compile { target c++11 } }
#include <assert.h>
template <bool> struct sa;
template <> struct sa<true> {};
struct one {char x[1];};
struct two {char x[2];};
int copy = 0;
int assign = 0;
struct base
{
base() {}
base(const base&) {++copy;}
base& operator=(const base&) {++assign; return *this;}
};
struct derived // { dg-message "declares a move" }
: base
{
derived() {}
derived(derived&&) {}
derived& operator=(derived&&) {return *this;}
};
int test1()
{
derived d;
derived d2(static_cast<derived&&>(d)); // should not call base::(const base&)
assert(copy == 0);
derived d3(d); // { dg-error "deleted" }
assert(copy == 1);
d2 = static_cast<derived&&>(d); // should not call base::operator=
assert(assign == 0);
d3 = d; // { dg-error "deleted" }
assert(assign == 1);
return 0;
}
int main()
{
return test1();
}
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