[Coin-discuss] Osi Defaults - Mps Reader / Writer

[Matthew Galati]

This is probably not an issue in most cases... but it seems we have 
moved to using for OsiXxxSolverInterface::readMps the Coin native mps 
reader, but for OsiXxxSolverInterface::writeMps the Xxx solver's 
internal mps writer.

In the case of OSL, the internal mps writer has a different default 
precision (less) than that of the Coin native mps writer.

Perhaps we should do one of the following:

1.) move the OsiXxx read and write mps to use the internal solver's mps 
interface (if one exists) - this would make it so the user gets what 
they would have expected (i.e., if they had used Xxx directly) - which 
is good, since Osi is suppose to be transparent

2.) move the OsiXxx read and write mps methods to all use the Coin mps 
interface - this would enforce a strict standard (at least for COIN users)

3.) add an argument option to use either Xxx's or the Coin mps interface 
with the default being Xxx's

I suppose 3 is the best option and might be applied to any similar 
scenario - where Coin and Xxx have like (but not exact) methods.

Thoughts?
Matt





-- 
Matthew Galati
ISE Lehigh University
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