[ROOT-10251] TF1. Problem with the internal template function GetTheRightOp with std::bind - SFTJIRA

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Type: Bug
Status: Open (View Workflow)
Priority: Low
Resolution: Unresolved
Affects Version/s: 6.12/00, 6.13/01, 6.14/00, 6.15/01, 6.18/00
Fix Version/s: None
Component/s: Graphics
Labels:
None
Environment:

ROOT Version: 6.10, 6.18
Platform: CC7
Compiler: gcc 4.8.5

Dear rooters,

It seems that TF1 does not admit a "std::bind" as argument since v6.10. The following code works in 6.10, but not in newer versions,

originalFF = [](double *x , double *par){ (void)par; return *x; }; // original function; it can be a functor, a proper function, a lambda...

boundFF = std::bind (originalFF,std::placeholders::_1, std::placeholders::_2);

TF1 myFitFunct("myFitFunct", boundFF,0, 1 , 0 )

It seems TF1 still admits lambda functions as arguments; this example works also in newer versions

originalFF = [](double *x , double *par){ (void)par; return *x; };

boundFF = std::bind (originalFF,std::placeholders::_1, std::placeholders::_2);

intermediateFF = [](double *x , double *par){ return boundFF(x, par); } // extra step in order to use std::bind with TF1

TF1 myFitFunct("myFitFunct", intermediateFF,0, 1 , 0 )

Thank you for your time.

Regards,

atd