2020-06-12 00:06:15 +02:00
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# kalk
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Kalk is a math parser library that supports user-defined variables and functions. An example of what it can parse:
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```
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f(x, y) = sum(1, 3, (2sin4/x!)^y) + cos(n deg)
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a = 3
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f(a, 2)
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```
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`>> 1.1899401098014355`
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## Features
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* Operators: +, -, \*, /, !
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* Groups: (), ⌈⌉, ⌋⌊
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* [Pre-defined functions and constants](https://github.com/PaddiM8/kalk/blob/master/kalk/src/prelude.rs)
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* User-defined functions and variables. `f(x, y) = xy`, `x = 5`
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* Understands fairly ambiguous syntax. Eg. `2sin50 + 2xy`
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2020-06-12 00:34:50 +02:00
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* Syntax highlighting
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* Special-symbol completion on tab. Eg. write `sqrt` and press tab. It will be turned into `√`.
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2020-06-12 00:06:15 +02:00
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## Usage
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```
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use kalk::parser;
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...
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let parser_context = parser::Context::new();
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assert_eq!(parser_context.eval("5*3").unwrap().unwrap(), 15);
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```
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## Compiling
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Make sure you have `diffutils` `gcc` `make` and `m4` installed.
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