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.. | ||
src | ||
Cargo.toml | ||
README.md |
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
use kalk::parser;
...
let parser_context = parser::Context::new();
assert_eq!(parser_context.eval("5*3").unwrap().unwrap(), 15);
Compiling
Make sure you have diffutils
gcc
make
and m4
installed.