rule of three
a rule of thumb in C++ (prior to C++11) stating that if a class defines one (or more) of destructor, copy constructor, or copy assignment operator, then it should probably explicitly define all three
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rule of three
Summary
rule of three is a rule of thumb[1]. It draws 109 Wikipedia views per month (rule_of_thumb category, ranking #7 of 22).[2]
Key Facts
- rule of three's instance of is recorded as rule of thumb[3].
- rule of three's Freebase ID is recorded as /m/027g02h[4].
- rule of three's facet of is recorded as Q2407[5].
- rule of three's facet of is recorded as copy constructor[6].
- rule of three's facet of is recorded as assignment operator[7].
- rule of three's facet of is recorded as destructor[8].
- rule of three's Stack Exchange tag is recorded as https://stackoverflow.com/tags/rule-of-three[9].
Why It Matters
rule of three draws 109 Wikipedia views per month (rule_of_thumb category, ranking #7 of 22).[2] It has Wikipedia articles in 8 language editions, a strong signal of global cultural recognition.[10] It is known by 8 alternative names across languages and contexts.[11]