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namespace VQDR.Expression {
class AddOperatorToken : OperatorToken, UnaryOperator {
public override bool is_unary {get; set; default = false;}
public override int priority {protected get {
if (is_unary) {
return Prio.UNARY;
} else {
return Prio.ADDICTIVE;
}
} protected construct set {}} // set_priority will have no effect.
construct {
mandatory_num_child = 2;
}
public AddOperatorToken (int position) {
base (position);
}
public override void evaluate_self (Context instance) throws GLib.Error {
Token r_child = get_right_child (),
l_child = get_left_child ();
if (r_child == null || l_child == null) {
var sb = new StringBuilder ("(AddOperationToken) Missing ");
if (r_child == null) {
sb.append ("left ");
} else if (l_child == null) {
sb.append ("right ");
} else {
sb.append ("both left and right ");
}
sb.append ("tokens.");
throw new VQDR.Common.EvaluationError.MISSING_TOKEN (sb.str);
}
if (is_unary) {
l_child.evaluate (instance);
r_child.evaluate (instance);
result_value = l_child.result_value.add (l_child.result_value);
result_max_value = l_child.result_max_value.add (l_child.result_max_value);
result_min_value = l_child.result_min_value.add (l_child.result_min_value);
reorder_max_min_values ();
result_string = l_child.result_string + "+" + l_child.result_string;
}
}
}
}
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