Introducing Operator Declaration

[Alexius-Huang]

What?
Declaring new type of operator.

Why?
Extended innovation and usage of operators.

How?
Important Rules:

1. New kind of operator should be declared in the beginning of the file.
2. Operator should be restricted in these characters: +, -, *, /, >, <, =, $, &, |, !, ?, _, \, ~, @, ^
3. Operator cannot be redeclared: +, -, *, /, >, <, =, ==, |> (See Introducing Pipe Operator #67 )
4. Operator without declaration specified in Operator Overloading and Overriding #66 is useless, since no input pattern is introduced
5. Operator can only be maximum length of 3, long operators are forbidden

Sample Wyrd Code

declare operator "<~"

def <~(op1: Str, op2: Str): Str do
  op1.concat(op2)
end

foo = "hello" <~ " world" |> Str.upcase()

Compiled Result

function OP_1(op1, op2) {
  return op1.concat(op2);
}

const foo = (OP_1("hello", " world")).toUpperCase();