arithmetics-dsl

name	arithmetics-dsl
description	Work with the Arithmetics calculator DSL (.calc) — a small language for defining named values and functions and evaluating expressions. Use when the user wants to write or edit arithmetics modules, define functions, or compute expressions in this DSL.

Arithmetics DSL

A little calculator language. A file is a module that contains some definitions and some expressions to evaluate.

Basics

Start a file with a module declaration:

module myCalc

After that you can write definitions and evaluations. A definition gives a name to a value or a function, and an evaluation is just an expression that gets computed.

def a: 5;
def b: 3;
def c: a + b;

a + c;

Functions take parameters in parentheses:

def square(x): x * x;
square(4);

Statements end with a semicolon.

Expressions

Expressions support the usual arithmetic operators — addition, subtraction, multiplication, division, power, and modulo. You can use parentheses to group things. Operators follow normal math precedence, so multiplication binds tighter than addition and so on.

Numbers can be integers or decimals.

Notes

• You can call other functions inside a definition, including building functions on top of other functions.
• Symbol names are fairly flexible.