DabbleScript

Dabble with JavaScript syntax.

// define an "is" operator
infixl 8 (is) = function (a, b) {
  return a === b;
};

assert.ok("everything" is "everything");

Install

$ npm install dabble

Or clone from git and run make.

Use

Translate dabble scripts:

$ dabble exaple/es-next-operators.dabble

Operator Declarations

infixl [lazy] <precedence> (op) = expr;

infixr [lazy] <precedence> (op) = expr;

prefix [lazy] (op) = expr;

postfix [lazy] (op) = expr;

assign [infixr|prefix|postfix] (op) = expr;

Infix operators can be left or right associative.

Assign operators roughly translate as lhs op val to lhs = op(lhs, val).

Lazy operators will have their arguments wrapped in thunks. Precedence determines the order of operations (detailed below), and can be a number from 1 - 16 or a builtin operator (to copy that operators precedence).

Infix Precedence

From lowest to highest precedence:

1  ,
2         // reserved for assignment operators; use assign declaration
3  ||
4  &&
5  |
6  ^
7  &
8  == != === !==
9  < <= > >=
10 >> >>> <<
11 + -
12 * % /
14        // reserved for unary; use prefix declaration
15        // reserved for postfix; use postfix declaration
16 .