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A comment on Pratt Parsers: Expression Parsing Made Easy (2011).

Re:Pratt Parsers: Expression Parsing Made Easy (2011) by krishanath on Saturday February 17, 2018 @12:41PM (#16401700)
Here's an expression parser, written in C#, that also has the ability to execute the parse tree:

https://github.com/Rajeev-K/formula-parser

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Re:Pratt Parsers: Expression Parsing Made Easy (2011) by dukoid on Saturday February 17, 2018 @02:14PM (#16402187)
Here is one written in Java: https://github.com/stefanhaustein/expressionparser

In addition to a simple math expression evaluator, examples include a BASIC interpreter and a simple computer algebra system O:)

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