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Rule of three (C++ programming)
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<p>The rule of three and rule of five are <a href="/facts/Rules_of_thumb/RopfGsJ0">rules of thumb</a> in <a href="/facts/C%2B%2B/Et0F2qn9">C++</a> for the building of <a href="/facts/Exception-safe/Hevphbsh">exception-safe</a> code and for formalizing rules on <a href="/facts/Resource_management_(computing)/Nd3YPa3P">resource management</a>. The rules prescribe how the default members of a <a href="/facts/Class_(computer_science)/zvzkSAtE">class</a> should be used to achieve these goals systematically. </p>