?=?: function
    with parameters
      pointer to signed int 
      signed int 
    returning 
      signed int 

?!=?: function
    with parameters
      signed int 
      signed int 
    returning 
      signed int 

0: signed int 
f: function
      accepting unspecified arguments
    returning 
      void 
    with body 
      CompoundStmt
        Declaration of a: signed int 
        Declaration of struct __anonymous0
            with members
              b: signed int 

        Declaration of a: instance of struct __anonymous0 
                  If on condition: 
              Cast of:
                Applying untyped: 
                    Name: ?!=?
                ...to: 
                    Name: a
                    Name: 0

              to:
                signed int 
          .... and branches: 
              CompoundStmt
                                  While on condition: 
                      Cast of:
                        Applying untyped: 
                            Name: ?!=?
                        ...to: 
                            Name: a
                            Name: 0

                      to:
                        signed int 
                  .... with body: 
                      CompoundStmt
                        Declaration of b: pointer to signed int 
                                                  Labels: {}
                          For Statement
                            initialization: 
                              Expression Statement:
                                Name: b

                            condition: 
                              Cast of:
                                Applying untyped: 
                                    Name: ?!=?
                                ...to: 
                                    Name: a
                                    Name: 0

                              to:
                                signed int 

                            increment: 
                              Name: b

                            statement block: 
                              CompoundStmt