public object visitUnaryExpr(Expr.Unary expr)
{
var right = evaluate(expr.right);
switch ([email protected])
{
case BANG:
return(!isTruthy(right));
case MINUS:
checkNumberOperand(expr.@operator, right);
return(-(double)right);
}
return(null);
}
public object visitUnaryExpr(Expr.Unary expr)
{
resolve(expr.right);
return(null);
}