RE: [ROOT] How to pass parameter into reflection function?

From: Philippe Canal (pcanal@fnal.gov)
Date: Thu Oct 17 2002 - 23:12:58 MEST 

Hi,

Since "test" is compiled, CINT can not know anything about local
variable.  Instead you need to create a string containing the
information needed.

For example:

void test()
{
	Double_t p = 100;
      char params[256];
	sprintf(params,"%d",p);
	TMethodCall m("test_func", params);
      if (!m.IsValid()) return;
	m.Execute();
}

Cheers,
Philippe



-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Du, Yifei
Sent: Thursday, October 17, 2002 8:18 AM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] How to pass parameter into reflection function?



Hi,

I try to pass a parameter into a reflection function as following,
"test_func" is a global C function:

void test()
{
	Double_t p = 100;
	TMethodCall m("test_func", "p");
	m.Execute();
}

Both "test" and "test_func" are compiled and linked. However, when I run it
CINT compains "p" is "not defined in current scope".

If I manually execute above 3 lines of "test" function in command line, then
everything's fine, I guess it is because then "p" is global.

So the question is how to pass local variable into a reflectoin function as
parameter in compiled env.


Thanks for any help

YF


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