website/public/posts/openbirch.md

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Functions Vectors Evaluate Isolate Solve Matrix Tensor Calculus Derivation Limit Procedures Scopes Statements Interpreter Parser Lexer
# Openbirch
Openbirch is a programming language that I made together with my friend from school.
It was an attempt at making a CAS tool to use instead of Maple (the UX is terrible).
The biggest challenge besides creating a programming language was creating a programming language
where any variable could be undefined at runtime, but still used to define other variables.
An example of this would be `x := 2*y`. Here `y` is not defined, but it is still used to define `x`.
This was a unique challenge that was solved by representing everything as a *tree*
![tree representation](/openbirch/tree.png "Tree Representation")