Set Insert

rascal-0.30.1

Add an element to a set.

Exp₁ + Exp₂

`Exp₁`	`Exp₂`	`Exp₁ + Exp₂`
`set[T₁]`	`T₂`	`set[lub(T₁,T₂)]`
`T₁`	`set[T₂]`	`set[lub(T₁,T₂)]`

The + operator will add elements to sets.

rascal>{1, 2, 3} + 4;
set[int]: {1,3,2,4}
rascal>1 + { 2, 3, 4};
set[int]: {1,3,2,4}
rascal>{1} + 1;
set[int]: {1}
rascal>1 + {1};
set[int]: {1}