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Re: -Wconversion versus libstdc++

Joe Buck wrote:

In the case of the containers, we are asserting/relying on the fact that
the pointer difference is zero or positive.  But this has become a
widespread idiom: people write their own code in the STL style.  If STL
code now has to be fixed to silence warnings, so will a lot of user code.

Good point. About it, we should also take into account the recent messages from Martin, pointing out that many C++ front-ends do not warn for signed -> unsigned.

About the library itself, I'm also concerned by the weakness of our pragma system_header vs templates, which makes the whole warning game always very dangerous...

Paolo.

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