[cfe-dev] Missing statements in the Clang print AST

[Miguel Aguilar]

Hi Dimitri,

I wanted to be sure that the functions in the AST have the complete body 
of the original code. By using the -ast-dump I got the following:

void main() (CompoundStmt 0x57fca90 <pc/consumer.cc:28:1, line:42:1>
   (DeclStmt 0x57fc110 <line:29:3, col:10>
     (0x57fc030 "int n")
     (0x57fc0a0 "int j"))
   (ForStmt 0x57fca50 <line:37:3, line:41:3>
     (DeclStmt 0x57fc358 <line:37:8, col:15>
       (0x57fc2e0 "int i =
         (IntegerLiteral 0x57fc338 <col:14> 'int' 0)"))
     (<<<NULL>>>)
     (BinaryOperator 0x57fc3f0 <col:17, col:19> '_Bool' '<'
       (ImplicitCastExpr 0x57fc3c0 <col:17> 'int' <LValueToRValue>
         (DeclRefExpr 0x57fc370 <col:17> 'int' lvalue Var 0x57fc2e0 'i' 
'int'))
       (ImplicitCastExpr 0x57fc3d8 <col:19> 'int' <LValueToRValue>
         (DeclRefExpr 0x57fc398 <col:19> 'int' lvalue Var 0x57fc030 'n' 
'int')))
     (UnaryOperator 0x57fc440 <col:22, col:23> 'int' postfix '++'
       (DeclRefExpr 0x57fc418 <col:22> 'int' lvalue Var 0x57fc2e0 'i' 
'int'))
     (CompoundStmt 0x57fc5d0 <line:38:3, line:41:3>)))

However, here I don't see the function call to the "printf" and the 
statement "s = 5". Any ideas?

Miguel

On 01/18/2013 11:31 AM, Dmitri Gribenko wrote:
> On Fri, Jan 18, 2013 at 12:23 PM, Miguel Aguilar
> <miguel.aguilar at ice.rwth-aachen.de>  wrote:
>> Hi,
>>
>> I am trying to inspect the AST generated by clang of a simple C++ program.
>> However in the body of the printed function are missing statements and
>> functions call with respect to the original code. Can you tell me what
>> parameters are missing while calling clang?
> Hello Miguel,
>
> The parameters are correct.  The AST printer in Clang is a bit broken.
>   Patches welcome!
>
> If you just need to inspect the AST, try -ast-dump.  It displays all AST nodes.
>
> Dmitri
>