[cfe-dev] Function Lookup in SemaExpr

[Aaron W.Hsu]

Dear Nikola:


Thanks a bunch for the help, this is what I was looking for. I was trying to do it with Context.Idents. Basically, at the moment it’s sort of like a built-in function, but the reason I need to lookup the function is because I’m rewriting parts of the AST to be calls into these built-ins instead of what they would be originally.






-- 
Aaron W. Hsu | arcfide at sacrideo.us | http://www.sacrideo.us
Please support my work: https://www.gratipay.com/arcfide/
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From: Nikola Smiljanic
Sent: ‎Monday‎, ‎December‎ ‎1‎, ‎2014 ‎10‎:‎30‎ ‎PM
To: Aaron W.Hsu
Cc: Clang Dev List





Where is this function name coming from? Is it some kind of built-in?



You should be able to construct DeclarationName from IdentifierInfo. Call PP.getIdentiferInfo inside Sema to get the identifier.



On Tue, Dec 2, 2014 at 1:03 PM, Aaron W.Hsu <arcfide at sacrideo.us> wrote:




Dear Nikola:




Thanks for the introduction to LookupName() and LookupResult. I think this is exactly what I want, especially LookupSingleName(). However, I seem to require a DeclarationName, which I don’t have yet. I’m not sure how to get one. I just have a string which is the name of the function I wish to lookup (this is in C), and I don’t know how to get from there to a DeclarationName and the other information I need. 






-- 
Aaron W. Hsu | arcfide at sacrideo.us | http://www.sacrideo.us
Please support my work: https://www.gratipay.com/arcfide/
לֵ֤ב חֲכָמִים֙ בְּבֵ֣ית אֵ֔בֶל וְלֵ֥ב כְּסִילִ֖ים בְּבֵ֥ית שִׂמְחָֽה׃





From: Nikola Smiljanic
Sent: ‎Monday‎, ‎December‎ ‎1‎, ‎2014 ‎6‎:‎19‎ ‎PM
To: Aaron W.Hsu
Cc: Clang Dev List







Create LookupResult and call LookupName on it passing appropriate DeclarationContext into which you're performing the lookup (can be a scope or record decl).



On Tue, Dec 2, 2014 at 10:00 AM, Aaron W.Hsu <arcfide at sacrideo.us> wrote:




Dear Clang Developers:




Inside of SemaExpr.cpp when handling BinOps, I want to lookup the (Expr *) and (NamedDecl) of a function by its name. How can I do this?





Yours truly,





Aaron W. Hsu





-- 
Aaron W. Hsu | arcfide at sacrideo.us | http://www.sacrideo.us
Please support my work: https://www.gratipay.com/arcfide/
לֵ֤ב חֲכָמִים֙ בְּבֵ֣ית אֵ֔בֶל וְלֵ֥ב כְּסִילִ֖ים בְּבֵ֥ית שִׂמְחָֽה׃




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