SCL: Simple CAS Language

Usage

git clone https://git.signorovitch.org/jacob/scl && cd scl
make release    # Build.
./scl           # Run.

If you wish to run tests, make sure to run git clone --recurse-submodules to include the Unity test framework.

Current State

Floating-point numbers
Negative numbers
Basic binary infix operators; +, -, *, /
The same as conventional functions; sum(), sub(), mul(), div()
Arbitrary length functions
User-defined variables
Control flow
User-defined functions

Syntax (Planned)

As one would expect, you can evaluate simple infix expressions:

> 1 + 1
= 2

You can also define your own functions:

> f(x) = 2x
> f(2)
= 4

Symbolic algebra is done in the following manner:

> f(x) = x^4
> diff(f, x:sym, 2)
= 12x^2

SCL will dynamically decide on types, but you can state them explicitly as well:

> f(x:int) = 2x
> f(2.2)
! f(x:int): x must be of type int.

Variables can be defined, with several attributes:

> a = 1             // Interpret type automatically.
> b:int = 1         // Must be int.
> c:const:int = 1   // Constant: value can never change.
> x:sym             // Treated symbolicaly.