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TODO

Roadmap for fixes and features.

Pre-release

Commands (help, clear, reset, quit, list constants, list units)
Documentation (usage)
Documentation (comments)
Units, unit conversion
Fix negation: what should -3^4 or -x^2 be?
Social media banner
Releases

General

CLI Options: version, help, evaluate
Compile to WASM, publish a webapp
Better tests
- Direct expression printing
- Better comparison
- Trigonometry
Manpage

Internals

Non-recursive treeify
Faster factorial function. Maybe use gamma instead?
Remove extra calls to .clone()
Arbitrary precision float (rug doesn't offer arbitrary exponents)

Math Features

Config file
History to file
Reference previous results
Variable definitions
Function definitions
Units
Dice
Mean, Median, Min, Max: arrays and multi-argument functions
Arbitrary base logarithm
Derivatives
CAS features (trig, roots and powers)
Complex numbers
acot/acoth functions
Binary, hex, octal numbers
Extra roots? (for convenience)
Sums and products
"per" as division?

Prompt

Live syntax/output (like firefox js terminal)
fish-style tab completion
Numbered expressions, history recall