[cfe-dev] main functions of clang

[James Molloy]

Hi Eyasu,

 

Ah, I understand your question better now. Clang has an option "-ast-print"
that does what you want. It is a cc1 option though, so you can't access it
directly through the driver.

 

$ clang -cc1 -help

 

Will show it, and to use it:

 

$ clang -Xclang -ast-print -S x.c -o -

Int x;

 

The "-Xclang" forces the next argument to be passed directly to the cc1
executable, which will recognise it.

 

Hope this helps,

 

James

 

From: eyasu getahun [mailto:eya.get at gmail.com] 
Sent: 12 December 2011 13:45
To: James Molloy
Cc: cfe-dev at cs.uiuc.edu
Subject: Re: [cfe-dev] main functions of clang

 


Hello James,

Thanks a lot for your help and sorry for my late reply. Your information is
helpful, however what I want to know is the main method of clang that calls
the printpretty() function. As you mentioned, lets have S
->printpretty(context). We can see this at StmtPrinter.cpp  class as I
mentioned earlier. My question is which main method of clang this function
is called. As we know at run time there is at least on main method that
calls other functions. Assume we want to print the source code of AST. We
will run clang on command line. we will use a command(I don't know the
command) that calls the print pretty function. Hope you get my idea. So,
which main method/function of clang is calling this function? Thanks again.

On Mon, Dec 12, 2011 at 7:04 PM, James Molloy <James.Molloy at arm.com> wrote:

Hi,

 

If you look at Stmt.h, you will find the main declarations for printPretty
and dumpPretty (line 305). They are member functions of the Stmt class, so
assuming you have a Stmt instance you can just call
"S->dumpPretty(Context);"

 

It's difficult to give a general rule for everything in Clang - as you know
it is quite a complex source base. But hopefully this has helped?

 

Cheers,

 

James 

 

From: cfe-dev-bounces at cs.uiuc.edu [mailto:cfe-dev-bounces at cs.uiuc.edu] On
Behalf Of eyasu getahun
Sent: 12 December 2011 10:40
To: cfe-dev at cs.uiuc.edu
Subject: [cfe-dev] main functions of clang

 

 Hello All,

Clang has a number of classes and functions inside its implementation. Most
of the time it makes me to be confused to identify the interconnection among
classes and functions. Because many functions may be called from different
header files. The main thing what i want to know is about main methods of
clang. I have seen 4 main functions in clang. But it is difficult for me to
identify in which main methods are other functions called. To make it clear
let me talk about one class(example StmtPrinter.cpp class). This class
prints back source code from AST.  Under this class their are two functions
i.e PrintPretty(..) and DumpPretty(..). Suppose I want to use
printPretty(..) and it is called at different functions.  Where is the main
method of clang that calls this function to print the source code? Can
someone tell me how it works. I tried to greped out on command line but
failed to get the main method that calls this function. Even I want to know
the command to use this function. 

Sorry, it might be silly question, but I failed to get it out. Thanks in
advance for your help!.


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