mirror of https://github.com/PaddiM8/kalker.git synced 2024-11-08 00:44:40 +01:00

History

PaddiM8 8b16e3cbd4 Added example image and expanded feature list.		2020-06-12 00:34:50 +02:00
..
src	Extended parser::eval and parser::parse documentation by explaining when `None` is returned.	2020-06-11 23:45:54 +02:00
Cargo.toml	Added example image and expanded feature list.	2020-06-12 00:34:50 +02:00
README.md	Added example image and expanded feature list.	2020-06-12 00:34:50 +02:00

kalk

Kalk is a math parser library that supports user-defined variables and functions. An example of what it can parse:

f(x, y) = sum(1, 3, (2sin4/x!)^y) + cos(n deg)
a = 3
f(a, 2)

>> 1.1899401098014355

Features

Operators: +, -, *, /, !
Groups: (), ⌈⌉, ⌋⌊
Pre-defined functions and constants
User-defined functions and variables. f(x, y) = xy, x = 5
Understands fairly ambiguous syntax. Eg. 2sin50 + 2xy
Syntax highlighting
Special-symbol completion on tab. Eg. write sqrt and press tab. It will be turned into √.

use kalk::parser;

...
let parser_context = parser::Context::new();
assert_eq!(parser_context.eval("5*3").unwrap().unwrap(), 15);

Make sure you have diffutils gcc make and m4 installed.