[Cpptool-develop] new refactoring

[Sven R. <rei...@ma...>]

In order to understand the code model component, I tried to implement a 
silly little refactoring which I would call SplitDeclaration. Basically, 
it transforms something like
{
  double *x, y[3], &z;
}
to
{
  double *x;
  double y[3];
  double &z;
}
This is useful if e.g., we want to modify the declaration of one of the 
variables, like make it const. It also avoids one common mistake, namely

int* x, y; // these are not two pointers

It is fully implemented using the code model, though the code is still a 
bit ugly, since I haven't gotten used to dealing with shared pointers yet. 
I will clean it up a bit before committing it.

In order to make it run, I had to modify the way declaration expressions 
are handled in the model/rewriter. I committed the changes, as well as the 
tests that made them necessary.

As I said, the main purpose was to understand the code model, and I start 
to like it :) I still have a few questions, but they can wait until 
Baptiste gets back.

More later,
Sven.

-- 
Sven Reichard
Dept. of Math. Sci.
University of Delaware
rei...@ma...