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The bug report contains a quote from the C++ standard: "An rvalue or lvalue t is swappable if and only if t is swappable with any rvalue or lvalue, respectively

by nikic 10y ago

The bug report contains a quote from the C++ standard: "An rvalue or lvalue t is swappable if and only if t is swappable with any rvalue or lvalue, respectively, of type T" What does this statement mean and why is it not tautological?

wfunction 10y ago
It defines swappability of a single value in terms of swappability of a pair of values.
yelnatz 10y ago
If you extract it for only one case, it's easier to read. >An rvalue t is swappable if and only if t is swappable with any rvalue of type T