Post-X is an actively used grammar language created in 1980. The Post-X language is designed to provide facilities for pattern-directed processing of strings, sequences and trees in an integrated applicative format.

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Example code from the web:

REPLACE GRAM := "<"^BREAK">"^"> ''
                {$<^((REPLACE GRAM)<
                   SELECT RHS
                   (ALT LTST<
                   (LHS--FIND $2 <GRAM)))

Last updated August 9th, 2020

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