[Cocci] about if else

[yafo lee]

Hi gus,
   I want to write a generic rule to delete a function call and che 
relative code for checking it's return value.
   shuch as the following 3 code snippets.
code 1:
   ret = foo();
   if (ret)
       printf("err");
code 2:
   ret = foo();
   if (ret) {
       printf("err");
   }

code 3:
   ret = foo();
   if(ret) {
       printf(a);
   }else {
       printf(b);
   }


how to write the rule ?

thanks.


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