<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Feb 8, 2011, at 9:12 AM, Larisse Voufo wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">1 - The documentation for DeclRefExpr says the following:<br> "<a class="el" href="http://clang.llvm.org/doxygen/classA.html">A</a> reference to a declared variable, function, enum, etc."<br> Does this mean that DeclRefExprs also refer to types such as a concept's associated type <br>
(declared with the typename keyword, as a TemplateTypeParmDecl) ?<br></blockquote><div><br></div><div>No. Look at the declaration hierarchy: DeclRefExpr stores a value (ValueDecl), but types are TypeDecls. Plus, a type reference is never an expression in the C family of languages.</div><br><blockquote type="cite">2 - How are TypedefTypes related to TypedefDecls, and possibly TemplateTypeParmDecl as well?<br></blockquote><div><br></div><div>TypedefType it's a reference to a TypedefDecl that occurs in the source. You can create a small file that has a typedef and refers to it, then look at the generated AST, to see how it works.</div><div><br></div><div>TemplateTypeParmDecl is a bit messier, since the corresponding TemplateTypeParmType refers to depth/index rather than a specific declaration. We'd like it to refer to the declaration at some point in the future, but we're not there yet.</div><br><blockquote type="cite">3- I ran into this confusion when I was trying to modify the transformations on calls to concept's associated <br>
functions and types. I can't decide which one of these methods would be the most appropriate or general <br> place for the change: TransformDeclRefExpr, or TransformDecl and TransformType (and/or even <br>
TransformNestedNameSpecifier).<br> Basically, I'm trying to say: if the referred type or function (or variable) we are trying to transform is <br> declared within a concept defn context, then match it to the appropriate concept map, and change <br>
the type or expression so that it now refers to the corresponding type or function (or variable) as defined<br> within the map context…<br></blockquote><br></div><div>The cleanest approach is probably just to create a new Type for references to associated types; then you can transform that associated type reference specifically.</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>- Doug</div><br></body></html>