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

Usage

``` use kalk::parser;

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

Compiling

Make sure you have diffutils gcc make and m4 installed.