calculator

Simple calculator in Go, using top-down recursive parser. At the moment, supported:

• Basic arithmetic (including power)
• Variables
• Function calls
• Function defining

Soon:

• Namespaces
• Types
• LLVM backend (using simple interpreter at the moment)

How to use?

git clone https://github.com/fakefloordiv/calculator
cd calculator
go run cmd/main.go

This will run an interactive shell. For running, go>=1.20 is required

Syntax

Enter an expression, the result will be printed on the next line.

Define function

f(x, y) -> x + y

Note: function body is always a single expression. The result of it is returned as a return value

Call function

f(x, y)

Define variable

x -> 5

Note: variables defining is an expression, returning value of a newly defined variable. By that, we also can use the following form:

x -> y -> 5

...resulting in x == y == 5

Binary operations

+ - add

- - subtract

/ - divide

* - multiply

^ - power

Unary operations

+ and - respectively.

Note: the precedence of unary operations are lower than power, function calls and in-parenthesis expressions. So in fact - just like in math