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[Benjamin Kehlet <benjamik@xxxxxxxxx>]

Hello

Is there a reason the function default_parameters() doesn't return a 
reference or pointer to a singleton object? Returning a singleton object 
would allow parameters to be changed class wide before objects are 
created. As of now it makes no sense to use the parameter system in 
constructors.

Or have I missed some smart trick?

To be specific I would like to have a parameter in the ODESolution 
class, but I would like to avoid accessing the parameter system within 
ODESolution::eval(). With a singleton the solution would be (from a user 
perspective)

// Set parameter class wide
ODESolution::default_parameters().set("exact_interpolation") = false;

// The parameter will be parsed in the constructor
ODESolution solution();

// Doesn't access the parameter system
solution.eval(...)



Benjamin