Add a generic Get to Value class about muparserx HOT 3 CLOSED

Sorry but no matter what you do muparserx cannot give you the type information 
you need at compile time. Strictly spoken the return type of muparser is Value. 
In most cases you can't process the value properly without first checking its 
type. You could also get a string or a matrix as the return value (wrapped in a 
Value). The return type is determined at runtime. Templates make their 
distinction at compile time. I don't see how this will fit together very well. 
A get function that is bound to fail at runtime when fed with the incorrect 
type doesn't seem to be of much use either.

I'm leaving the issue open for the moment but i don't see this as a defect. 
This is an inherent part of the design. 

In my case the return value is a specific type, otherwise it is an error, and 
it would be convenient if e.g. a Get<int> would do all the error checking and 
if ok return the value of .GetInteger() and throw otherwise, for example. It 
would be even better if the parser knew what type I want to be returned from 
the expression, and throw if the expression doesn't match, but I guess that 
isn't supported.

Closed since it's more of a feature request.