[cfe-dev] Basic source-to-source transformation with Clang

[Satya Prakash Prasad]

Thanks for the information as provided, but I get output like below:

(CallExpr 0x1a85c480 'int'
  (ImplicitCastExpr 0x1a85c468 'int (*)(const char *restrict, ...)'
<FunctionToPointerDecay>
    (DeclRefExpr 0x1a85c3e8 'int (const char *restrict, ...)' lvalue
Function 0x1a84e8e0 'printf' 'int (const char *restrict, ...)'))
  (ImplicitCastExpr 0x1a85c4b8 'const char *' <ArrayToPointerDecay>
    (StringLiteral 0x1a85c388 'const char [13]' lvalue "In inc [%d]\n"))
  (ImplicitCastExpr 0x1a85c4d0 'int' <LValueToRValue>
    (DeclRefExpr 0x1a85c3c0 'int' lvalue ParmVar 0x1a85c100 'p' 'int &')))

Kindly note that my requirement is to print the C++ code itself like
dumpAll() method generated for above for below C++ code:

p++;

Similarly for other like:

dumpAll()

(CallExpr 0x1a85dec8 'int'
  (ImplicitCastExpr 0x1a85deb0 'int (*)(const char *restrict, ...)'
<FunctionToPointerDecay>
    (DeclRefExpr 0x1a85de88 'int (const char *restrict, ...)' lvalue
Function 0x1a84e8e0 'printf' 'int (const char *restrict, ...)'))
  (ImplicitCastExpr 0x1a85df08 'const char *' <ArrayToPointerDecay>
    (StringLiteral 0x1a85cdd8 'const char [19]' lvalue "y = [%d] z = [%d]\n"))
  (ImplicitCastExpr 0x1a85df20 'int' <LValueToRValue>
    (DeclRefExpr 0x1a85ce18 'int' lvalue Var 0x1a85c6f0 'y' 'int'))
  (ImplicitCastExpr 0x1a85df38 'int' <LValueToRValue>
    (DeclRefExpr 0x1a85de60 'int' lvalue Var 0x1a85c760 'z' 'int')))

While C++ Code:

printf("y = [%d] z = [%d]\n", y , z);

Thanks in advance.

Regards,
Prakash


On Fri, Jul 6, 2012 at 4:22 PM, Manuel Klimek <klimek at google.com> wrote:
> On Fri, Jul 6, 2012 at 12:25 PM, Satya Prakash Prasad
> <satyaprakash.prasad at gmail.com> wrote:
>>
>> I made some progress with whatever support I received from this
>> discussion forum. Thanks to all who responded to my request. My
>> requirement now is to find a way I can print CLANG AST code to C++ / C
>> human readable statements:
>>
>>     bool VisitStmt(Stmt *s) {
>>         if (isa<CompoundStmt>(s)) {
>>                 CompoundStmt *S = cast<CompoundStmt>(s);
>>                 for (CompoundStmt::body_iterator  I = S->body_begin(),
>> E = S->body_end(); I != E; ++I)
>>                 {
>>                         Stmt *i =  cast<Stmt>(*I);
>>                         //How can I print the C++ / C statement which
>> CLANG is processing
>
>
> You can use i->dumpAll() if you want to see what's going on.
>
> Cheers,
> /Manuel
>
>>
>>                 }
>>         }
>>
>>         return true;
>>     }
>>
>> Regards,
>> Prakash
>>
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>> cfe-dev at cs.uiuc.edu
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>
>