Class with a template member function

ROOT
1

Hi,

I am only interested in ROOT 6. Lets say I have a
class like this with a template function.

class TestClass {
public:
…
template
void f();
};

And I want to call the template function from a
pyROOT script something like this.

import ROOT
b = ROOT.TestClass()
b.f(AType)()

I get errors like "object has no attribute ‘f’"
when I try it.

Is this possible in pyROOT? If not any suggestions
as to alternative approaches would be welcome.

Regards
David

2

Argue is bug with first instantiation. If explicit provided, next instantiation works fine:[code]$ cat toto.h
#include

class TestClass {
public:
template
void f() { std::cout << “a bientot” << std::endl; }
};

template void TestClass::f();[/code]
Note last line. Type not relevant, existence is. Now use:[code]>>> from ROOT import *

gInterpreter.LoadMacro(“toto.h”)
b = TestClass()
b.f(TObject)()
a bientot
[/code]
Should file with devs.

-Dom

3

Thanks. Your suggestion works.

Something like this early in the python script also seems to
make it work.

ROOT.gROOT.ProcessLine(‘template void TestClass::f();’)

-David

4

Sorry to revive this old thread, but was an issue ever filed? I still see this issue in 6.06.01.

5

Hi,

definitely no changes in git and I can’t find it in JIRA, so I don’t think so.

Cheers,
Wim