# 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