[cfe-dev] A patch for printing policy and other stuff

[Olaf Krzikalla]

Hi @clang,

I've created a patch for some of the issues discussed earlier in "A 
bunch of more or less related issues" and some other things:
Into the details:

1. In ParentMap I added a function "addStmt" which actually adds a 
Statement or updates the parent relations of an already existing 
statement. Due to the second functionality I'm rather unsure with the 
name but updateStmt sounds not right too as it conceals the add part.
2. In  PrinterHelper::handledStmt I introduced the IndentLevel. This can 
be useful if someone (e.g. me) want to print something before a 
particular statement (e.g. a comment) properly formatted. This affected 
AST/CFG.cpp.
3. PrintingPolicy gets a new property IndentStyle. At the moment this 
property is only evaluated in StmtPrinter.
4. A harmless but useful typedef in StmtVisitor.

Best
Olaf Krzikalla

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