RSC is a handwritten scientific calculator for use in Rust projects that require turning an equation inside a string into a result. RSC is designed to be very lightweight and have as few dependencies as possible. It has the goal of just doing a single thing really well, and enabling anyone to extend it with more features.

Size

RSC 0.1 is less than 300 lines of code.

Performance

RSC 0.1 computes instantaneously, even with debug builds.

Stable

When RSC reaches stable, it will rarely change. Only performance improvements will likely appear after it has become stable. You can probably expect RSC 1.0 in about a week.

License

RSC is MIT licensed. RSC will always remain free to modify and use without attribution.

Example

PS C:\Users\lukew> rsc
>2+2
4
>3(3)
9
>2+3*4
14
>2+3(4)
14
>(3)(4)
12
>sqrt 4
2
>sqrt(4)
2
>sqrt 4 + 2
4
>sin(6.5/9.7)
0.6210667900937665
>cos(7.2/6.5)
0.44672732786461816
>sin cos tan 2
-0.5449592372801408
>sin ( cos ( tan ( 2 ) ) )
-0.5449592372801408

Errors

>oops
Lexer error: InvalidIdentifier("oops")
>3.3.1
Lexer error: InvalidNumber("3.3.1")
>2+
Parser error: ExpectedFactor(None)
>2++
Parser error: ExpectedFactor(Some(Operator(Plus)))