CompareOperation.ceylon
"A compare expression.
No associativity.
Examples:
first <=> last
n <=> 0
This is the concrete class for expressions like `first <=> last`;
not to be confused with [[ComparisonOperation]], the abstract superclass of expressions like `a <= b` and `x > 3`!"
shared class CompareOperation(leftOperand, rightOperand)
extends BinaryOperation() {
"The left-hand side."
shared actual ExistsNonemptyExpression leftOperand;
"The right-hand side."
shared actual ExistsNonemptyExpression rightOperand;
shared actual [ExistsNonemptyExpression, ExistsNonemptyExpression] children = [leftOperand, rightOperand];
operator = "<=>";
shared actual Result transform<out Result>(Transformer<Result> transformer)
=> transformer.transformCompareOperation(this);
shared actual Boolean equals(Object that) {
if (is CompareOperation that) {
return leftOperand == that.leftOperand && rightOperand == that.rightOperand;
} else {
return false;
}
}
shared actual Integer hash
=> 31 * (leftOperand.hash + 31 * rightOperand.hash);
shared CompareOperation copy(ExistsNonemptyExpression leftOperand = this.leftOperand, ExistsNonemptyExpression rightOperand = this.rightOperand) {
value ret = CompareOperation(leftOperand, rightOperand);
copyExtraInfoTo(ret);
return ret;
}
}