UnionOperation.ceylon
"A set union expression.
Defined via [[Set.union]]. Left-associative.
Examples:
ints|floats
x1&y1|x2&y2"
see (`class UnionAssignmentOperation`)
shared class UnionOperation(leftOperand, rightOperand)
extends SetOperation() {
"The left unioned set."
shared actual UnioningExpression leftOperand;
"The right unioned set."
shared actual IntersectingExpression rightOperand;
shared actual [UnioningExpression, IntersectingExpression] children = [leftOperand, rightOperand];
operator = "|";
shared actual Result transform<out Result>(Transformer<Result> transformer)
=> transformer.transformUnionOperation(this);
shared actual void visit(Visitor visitor)
=> visitor.visitUnionOperation(this);
shared actual Boolean equals(Object that) {
if (is UnionOperation that) {
return leftOperand == that.leftOperand && rightOperand == that.rightOperand;
} else {
return false;
}
}
shared actual Integer hash
=> 31 * (leftOperand.hash + 31 * rightOperand.hash);
shared UnionOperation copy(UnioningExpression leftOperand = this.leftOperand, IntersectingExpression rightOperand = this.rightOperand) {
value ret = UnionOperation(leftOperand, rightOperand);
copyExtraInfoTo(ret);
return ret;
}
}