OfOperation.ceylon
"A coverage expression.
Narrows or widens the type of an expression to another type that *covers* the expression type.
Defined natively. No associativity.
Examples:
thing of Object?
component.parent of Container?"
shared class OfOperation(operand, type)
extends UnaryTypeOperation() {
"The expression whose type is narrowed or widened."
shared actual ExistsNonemptyExpression operand;
"The covering type to which the expression is narrowed or widened."
shared actual Type type;
shared actual [ExistsNonemptyExpression, Type] children = [operand, type];
operator = "of";
shared actual Result transform<out Result>(Transformer<Result> transformer)
=> transformer.transformOfOperation(this);
shared actual void visit(Visitor visitor)
=> visitor.visitOfOperation(this);
shared actual Boolean equals(Object that) {
if (is OfOperation that) {
return operand == that.operand && type == that.type;
} else {
return false;
}
}
shared actual Integer hash
=> 31 * (operand.hash + 31 * type.hash);
shared OfOperation copy(ExistsNonemptyExpression operand = this.operand, Type type = this.type) {
value ret = OfOperation(operand, type);
copyExtraInfoTo(ret);
return ret;
}
}