Hi John,

On Jul 19, 2013, at 1:18 PM, Thompson, John 
<[email protected]> wrote:

> The enclosed patch implements a much reworked new feature in the modularize 
> tool for checking for inconsistent macro expansions and inconsistent 
> condition expression evaluations in conditional directives with respect to 
> C++ modules.  It also includes a modified test for it.
>  
> This is an implementation of the proposal I posted previously (but received 
> no feedback), written up in this Google Doc: 
> https://docs.google.com/document/d/1dxXKI8r-3NwQDR6Zm-JT9kh-hWrruw8tUKmG9emY8AU/edit?usp=sharing
>  
> For details about the implementation in prose form, I’ve written the 
> following Google Docs document, with comments enabled: 
> https://docs.google.com/document/d/1TBQF3nzk66Sw0hJV0cCsNFvwF_zQuO5WbjoMmPtEfHU/edit?usp=sharing
>  
> The patch is relative to the “extra” directory at tools/clang/extra.
>  
> I’m sorry it’s such a large patch.  I’ve tried to put as much as I can of the 
> new feature code in a new .h interface and .cpp implementation file, with 
> just the bare minimum API to connect it to Modularize.cpp.
>  
> I’d appreciate your review feedback for this patch and/or permission to check 
> in.

This looks great! The detail in these diagnostics will come in quite handy for 
others working to clean up headers for modules. 

I looked through the latest version of the patch, and I don't have much in the 
way of specific feedback: the architecture looks solid, and I didn't see any 
issues with the implementation. Go ahead and commit, thanks!

        - Doug

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