From morusaka at libero.it  Fri Feb  1 06:48:40 2013
From: morusaka at libero.it (morusaka at libero.it)
Date: Fri, 1 Feb 2013 06:48:40 +0100 (CET)
Subject: [GiNaC-devel] is_ex_the_function
Message-ID: <857179693.17310231359697720793.JavaMail.actor@webmail55>

Hi,

I can't understand why, when I try to use is_ex_the_function with the power 
function, I get a:
>> error: ?power_SERIAL? was not declared in this scope

My code is something like this:

  symbol x("x");
  ex expr = power(x, 2);
  std::cout << expr << std::endl;
  std::cout << is_ex_the_function(expr, power) << std::endl;

I get my error on line 4.

On the other hand, everything works fine with:

  symbol x("x");
  ex expr = sin(x);
  std::cout << expr << std::endl;
  std::cout << is_ex_the_function(expr, sin) << std::endl;

Could you please help me?

Thank you,

Luca-


From kreckel at ginac.de  Sat Feb  2 11:46:40 2013
From: kreckel at ginac.de (Richard B. Kreckel)
Date: Sat, 02 Feb 2013 11:46:40 +0100
Subject: [GiNaC-devel] is_ex_the_function
In-Reply-To: <857179693.17310231359697720793.JavaMail.actor@webmail55>
References: <857179693.17310231359697720793.JavaMail.actor@webmail55>
Message-ID: <510CEE90.5020701@ginac.de>

On 02/01/2013 06:48 AM, morusaka at libero.it wrote:
> I can't understand why, when I try to use is_ex_the_function with the power
> function, I get a:
>>> error: ?power_SERIAL? was not declared in this scope

Like add and mul, class power is not a function:
http://www.ginac.de/tutorial/The-class-hierarchy.html#The-class-hierarchy

   -richy.
-- 
Richard B. Kreckel