如何用ABAP代碼生成新的function module

REPORT zcreate_fm.

DATA: date               TYPE sy-datum,

     time               TYPE sy-uzeit,

     pool_name          TYPE rs38l-area,

     func_name          TYPE rs38l-name,

     lt_codeline        TYPE STANDARD TABLE OF char255,

     l_function_include TYPE progname.

DATA it_exception_list     TYPE TABLE OF rsexc.

DATA it_export_parameter   TYPE TABLE OF rsexp.

DATA it_import_parameter   TYPE TABLE OF rsimp.

DATA wa_rsimp TYPE rsimp.

DATA it_tables_parameter   TYPE TABLE OF rstbl.

DATA it_changing_parameter TYPE TABLE OF rscha.

DATA wa_rscha TYPE rscha.

DATA it_parameter_docu TYPE TABLE OF rsfdo.

date = sy-datum.

time = sy-uzeit.

CONCATENATE 'ZTEST_FBS_' date time INTO pool_name.

CONCATENATE 'ZFB1_' pool_name INTO func_name.

CALL FUNCTION 'RS_FUNCTION_POOL_INSERT'

 EXPORTING

   function_pool           = pool_name

   short_text              = 'TEST_FUGR_FBS'               "#EC NOTEXT

   devclass                = '$TMP'                        "#EC NOTEXT

   responsible             = sy-uname

   suppress_corr_check     = space

 EXCEPTIONS

   name_already_exists     = 1

   name_not_correct        = 2

   function_already_exists = 3

   invalid_function_pool   = 4

   invalid_name            = 5

   too_many_functions      = 6

   no_modify_permission    = 7

   no_show_permission      = 8

   enqueue_system_failure  = 9

   canceled_in_corr        = 10

   undefined_error         = 11

   OTHERS                  = 12.

IF sy-subrc <> 0.

 WRITE:/ 'Fugr was not created!: ' , sy-subrc .

 RETURN.

ENDIF.

wa_rsimp-parameter = 'P1_I'.                                "#EC NOTEXT

wa_rsimp-default   = '10'.                                  "#EC NOTEXT

wa_rsimp-reference = 'X'.                                   "#EC NOTEXT

wa_rsimp-typ       = 'I'.                                   "#EC NOTEXT

APPEND wa_rsimp TO it_import_parameter.

wa_rscha-parameter = 'P1_C'.                                "#EC NOTEXT

wa_rscha-reference     = 'X'.                               "#EC NOTEXT

wa_rscha-typ       = 'I'.                                   "#EC NOTEXT

APPEND wa_rscha TO it_changing_parameter.

CALL FUNCTION 'FUNCTION_CREATE'

   funcname                = func_name

   short_text              = 'TEST_FUNC_FB'                 "#EC NOTEXT

 IMPORTING

   function_include        = l_function_include

 TABLES

   exception_list          = it_exception_list

   export_parameter        = it_export_parameter

   import_parameter        = it_import_parameter

   tables_parameter        = it_tables_parameter

   changing_parameter      = it_changing_parameter

   parameter_docu          = it_parameter_docu

   double_task             = 1

   error_message           = 2

   OTHERS                  = 7.

 WRITE: / 'failed:', sy-subrc.

READ REPORT l_function_include INTO lt_codeline.

DELETE lt_codeline INDEX lines( lt_codeline ).

DELETE lt_codeline WHERE table_line IS INITIAL.

WRITE: / 'created successful:', func_name.

APPEND | WRITE:/ 'OK'.| TO lt_codeline.

APPEND | WRITE:/ P1_I.| TO lt_codeline.

APPEND 'ENDFUNCTION.' TO lt_codeline.

INSERT REPORT l_function_include FROM lt_codeline.

COMMIT WORK AND WAIT.

DATA: ptab TYPE abap_func_parmbind_tab,

     lv_i TYPE int4 VALUE 12.

ptab = VALUE #( ( name  = 'P1_I'

                 kind  = abap_func_exporting

                 value = REF #( 3 ) )

               ( name  = 'P1_C'

                 kind  = abap_func_changing

                 value = REF #( lv_i ) )

               ).

TRY.

   CALL FUNCTION func_name

     PARAMETER-TABLE ptab.

 CATCH cx_root INTO DATA(cx_root).

   WRITE: / cx_root->get_text( ).

ENDTRY.

CALL FUNCTION 'FUNCTION_DELETE'

   funcname = func_name.

CALL FUNCTION 'FUNCTION_POOL_DELETE'

   pool = pool_name.