Top Down Operator Precedence (2007) (crockford.com)

This is my favorite parsing technique, but I found Crockford's presentation of it really difficult to wrap my head around. I think he muddles the technique with his own strong opinions around dynamic types and prototypes. In particular:

> Another explanation is that his technique is most effective when used in a dynamic, functional programming language. Its use in a static, procedural language would be considerably more difficult.

I've implemented Pratt parsers in Java, C#, C++, Dart, and C, and I've never found them difficult to express in any of those languages. If you'd like a different treatment of the technique, I wrote a blog post about them using Java:

http://journal.stuffwithstuff.com/2011/03/19/pratt-parsers-e...

And a chapter in my book using C:

http://craftinginterpreters.com/compiling-expressions.html

A fairly recent take on the technique, with an accompanying TypeScript implementation:

How Desmos uses Pratt Parsers - https://engineering.desmos.com/articles/pratt-parser/ (Dec 2018)

https://github.com/desmosinc/pratt-parser-blog-code

At the bottom of the article, they mention a number of articles including the posted one by Doug Crockford, as well as the (excellent) article mentioned in a sibling comment, by @munificent.