How to call a FM inside FOR loop with new ABAP syntax?

[Nitish2027]

Hi experts,

I have a requirement to call a FM inside the FOR Loop with the ABAP 750 syntax.

Basically what I want to know is how do I code the below requirement using a FOR Loop, if it is possible.

LOOP AT itab INTO wa.
  CALL FUNCTION 'X'
    EXPORTING
      e_param = wa-field
    IMPORTING
      i_param = wa-field.
  wa_range-sign = 'I'.
  wa_range-option = 'EQ'.
  wa_range-option-low = wa-field.
  APPEND wa_range TO lr_range.
ENDLOOP.

I'm trying to do something like the below code. But, I want to pass wa-field to a conversion FM before creating the range table.

DATA(lr_range) = VALUE lr_range(
                                FOR wa IN it_tab (
                                          sign = 'I'
                                          option = 'EQ'
                                          low = wa-field
                                  )
                                ).

How do I achieve this inside the FOR Loop?

Please advise. Thanks 🙂

[FredericGirod]

Strange to request to use new ABAP syntax with an old concept like the FM.

[DominikTylczyn]

Hello nitish2027

As frdric.girod FM is an old concept, that doesn't mix and match nicely with new ABAP syntax. However you can call methods from LET expression - see SAP Help let_exp - LET ... IN, example of alternative 1:

TYPES:
   BEGIN OF struc,
     col1 TYPE i,
     col2 TYPE i,
   END OF struc.

DATA(rnd) = cl_abap_random_int=>create(
  seed = CONV i( sy-uzeit ) min = 1 max = 10 ).

DO 5 TIMES.
  DATA(struc) = VALUE struc(
    LET x = rnd->get_next( )
        y = x * x
        z = sy-index * 1000 IN col1 = x + z
                               col2 = y + z ).
  cl_demo_output=>write( struc ).
ENDDO.
cl_demo_output=>display( ).

So, you could wrap the FM up in a method and call the method from FOR loop.

Best regards

Dominik Tylczynski

[Nitish2027]

Thanks. I will wrap the FMs functionality in a method and call it using LET.

[Nitish2027]

That's what I wanted to know if it is possible to do if the requirement is like this.

Now I understand that requirements with FMs involved should be done with Loop Endloop.