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==History==
{{See also|Regular expression#History}}▼
{{Expand section|date=May 2008}}
Early programming languages with pattern matching constructs include [[COMIT]] (1957), [[SNOBOL]] (1962), [[Refal]] (1968) with tree-based pattern matching, [[Prolog]] (1972), [[SASL programming language|SASL]] (1976), [[NPL programming language|NPL]] (1977), and [[Kent Recursive Calculator|KRC]] (1981).
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[[Computer algebra system]]s generally support pattern matching on algebraic expressions.<ref>Joel Moses, "Symbolic Integration", MIT Project MAC MAC-TR-47, December 1967</ref>
▲{{See also|Regular expression#History}}
==Primitive patterns==
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