Toy symbolic differentiator (to play with rust).
Interesting things
I tried implementing this using trait objects, and it became massively unwieldy very quickly.
It got really ugly when Expression had to derive fmt::Display, and I still couldn't 'format!', because the expression wasn't sized.
What's missing (Oh So Much).
- Parsing expressions
- Precedence display
- Nice display (3*x -> 3x)
- Non integral exponents
- Trig functions