[cfe-users] uniquely identifying names

[Anna Zaks via cfe-users]

> On Aug 26, 2016, at 8:33 AM, David Blaikie via cfe-users <cfe-users at lists.llvm.org> wrote:
> 
> There's no structural identity of code in Clang that I know of - I know someone's building a tool for doing structural similarity for things like plagiarism detection (I think there are some patches on the clang mailing list).
> 

+ Raphael, who is the GSoC student currently working on a similar problem. Raphael is upstreaming his patches into the clang static analyzer.

> But if you only need identity within a single process, the pointer value of the pointer to any AST construct is a unique identity you can use.
> 
> (line/file/column isn't sufficiently unique - you could have a file that is included under different macro situations and each time it defines a different function, but all those functions would appear to be defined on the same line/file of that included file - or a macro that defines multiple functions - both can be resolved by looking at the more complete location information (including macro locations, etc))
> 
> On Fri, Aug 26, 2016 at 5:11 AM folkert via cfe-users <cfe-users at lists.llvm.org <mailto:cfe-users at lists.llvm.org>> wrote:
> Hi,
> 
> The Sun java compiler allows you to (from java) walk the AST and
> investigate it. Each token is stored in an object. Each object has a
> hash() method which uniquely identifies it.
> 
> Now I was wondering: can I do so with the LLVM tooling as well? I could
> of course if I want to identify e.g. a function name just pick the line-
> and column number and maybe include the function name itself as well but
> that would constantly change when lines are added and/or removed.
> 
> Any suggestions?
> 
> 
> regards,
> 
> Folkert van Heusden
> 
> --
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