[cfe-dev] which class represent variable scope ?

[kevinlynx]

For example:

    void func() {
        unsigned a;
        {
             unsigned b;
        }
   }

I want to know whether `a` and `b` is in the same code scope.  DeclContext does NOT work on this, which means `a` and `b` have the same DeclContext (a function decl context). I googled and found someone have already asked this question but didn't get an answer. 

Thanks
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