The boost documentation states that the == operator "Compares the stored pointers of the two smart pointers." The phrase "smart pointers" refers to the shared arrays themselves, because that's really all a shared array *is.* So the operation described above is actually equivalent to what you outlined in item 2. of answering your own question. mike On Thu, 2007-10-25 at 11:22 -0700, chun ping wang wrote:
Hi I notice boost shared_array compares the pointer address not the pointer themselves. What would be the best way to compare the actual value of boost shared_array.
1.) shared_array<T> a; shared_array<T> b;
1.) return (a.len == b.len && (memcmp(a, b, len) == 0));
or
2.) if (a.len != b.len) return false; for (ptrdiff_t i = 0; i != a.len; ++i) if(a[i] != b[i]) return false;
One that works ALL the times.
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