expression-parser

Continuous REPL Parser for user defined expression (using fastparse)

Pre requisites:

• java - on Mac: brew cask install adoptopenjdk8
• sbt - on Mac: brew install sbt

Example expressions:

• 1.34 - 234.5 + 3443 ^ 2 + sqrt(69 - 5) * log(34)
• sqrt(3 ^ 2 + 4 ^ 2)
• sqrt(add(square(3), square(4)))
• add(12.0, 23, -1, 030, 343,23)
• quit or exit

Run using:

sbt run

Create a standalone jar using:

sbt assembly

Preview

TODOs:

• Add invalid arguments error for functions.
• Add function name auto-completion.
• Add expression color highlighting (multi-color).
• Add expression history and ANSI console edit support.