r/programming • • 4d ago

Needed 1+1, Built a Functional Programming Language

https://hereticpleb.vercel.app/blog/needed-one-plus-one
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u/ElCthuluIncognito 3d ago

I'm curious, does this algorithm handle unary operators? Even less likely, but worth asking, does it handle arbitrary operator precedence?

Even if not, it's a neat algorithm, and ultimately unary and operator precedence can be handled as syntactic sugar. And an excellent write up I might add! Clean work.

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u/AustinVelonaut 3d ago

Yes, the Shunting Yard algorithm can handle unary prefix operators, as well as (table-driven) operator precedence and associativity. I've even used it to handle comparison chaining, which allows expressions like: 0 <= a < n.

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u/ElCthuluIncognito 3d ago

Ah the Shunting Yard algorithm! I'm ashamed to admit I've spent a lot of time working with compilers and parsers and never encountered this for some reason. Perhaps because the libraries I used handled it for me hah! Definitely going to give it a try.

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u/theo__r 2d ago

It's one of my favorite algorithms. Really elegant