Vassil Vassilev 3bcfc8b25e Prepare dynamic scopes for integration in ROOT;
* Merge the DynamicIDHandler into InterpreterCallbacks. The DynamicIDHandler was
used to define the failed lookup names as dependent, so that later on they could
be "healed" by the EvaluateTSynthesizer - by generating a call to gCling->EvaluateT...

* Add a flag in the InterpreterCallbacks giving a hint when the failed lookup is
performed - during compilation time or during evaluation type, maybe its name is
misnomer. Maybe I should rename it to IsInRuntimeEvalMode or smth like that...

* Simplify the evaluation routine. The idea is to be merged with one of the 
existing - either echo or evaluate

* Implement proper mock object as test dynamic symbol resolver callback. Now it
fully relies on InterpreterCallbacks.

* Implement dynamic expression node marking. Every node that needs runtime 
resolution is marked as dependent. However, clang marks other nodes as dependent,
too (eg. templates). Until now it was very difficult to distinguish between both.
Now every "artificially" (marked by us) node's declaration is annotated so that 
it could be found back easily by using a simple RecursiveASTVisitor.

Generally we have two issues when using dynamic scopes - filtering the failed 
lookups that need to be evaluated at runtime, and filtering the "artificially"
marked as dependent dynamic nodes/decls. Whereas the second issue is solved by
using the annotations, the first one is more tricky to solve because clang doesn't
give us enough information to conclude what should be done. For now I have 
narrowed down the cases so that dynamic nodes can appear only in function decls.


git-svn-id: http://root.cern.ch/svn/root/trunk@48575 27541ba8-7e3a-0410-8455-c3a389f83636
2013-02-14 17:29:30 +00:00
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