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 √.

Usage

rust use kalk::parser; let mut parser_context = parser::Context::new(); let precision = 53; assert_eq!(parser::eval(&mut parser_context, "5*3", precision).unwrap().unwrap(), 15);

Compiling

Make sure you have diffutils gcc make and m4 installed.