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Can vi emulate the power of yacc?

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  Can vi emulate the power of yacc? rockbrentwood@gmail.com - 2020-03-13 00:56 -0700

#2485 — Can vi emulate the power of yacc?

There are 3 ingredients in vi which, when combined, via the Chomsky-Schuetzenberger Theorem, may give it the power to fully emulate simple syntax direct translations and push down transducers ... and possibly even syntax directed translations.

(1) "%" to match brackets; with the important condition that this works on at least 2 different kinds of brackets
(2) the regular expression facility; particularly its ability to name and use parameters
(3) the search & replace function.

So, here's a simple challenge of sorts to test the idea: write a vi script that converts between infix and postfix order with at least two levels of operator precedence. I don't know if it can actually be done.

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