Question

在尝试处理如下所示的FullyTyped dataReference表达式时，我得到了一个＆＃34; ThisIsNotAObjectReference＆＃34; -syntaxMessage：

method getDataReference.
 rr_value = ref #( varStructure ).
endmethod.

data(lr_value) = object->getDataReference( )->structureComponent.

我理解检索objectReferences的语法是一样的，但是如何处理表达式中的fullyTyped dataReferences？

Answer 1

我有点猜测你想在这里实现什么，但据我所知，你需要在访问其内容之前取消引用数据引用。以下内容扩展了您在上面发布的代码。

report ztest.

class lcl_test definition.

  public section.

    methods getDataReference
      returning value(rr_value) type ref to tadir.

  private section.

    data varStructure type tadir.

endclass.

class lcl_test implementation.

  method getDataReference.

    varstructure-author = sy-uname.
    rr_value = ref #( varStructure ).

  endmethod.

endclass.

start-of-selection.

  data(object) = new lcl_test( ).
  data(lr_value) = object->getDataReference( ).

  field-symbols <structure> type tadir.
  assign lr_value->* to <structure>. " This is the dereferencing step
  write / <structure>-author.

Answer 2

您不能将方法调用与参考组件访问链接在一起。这样做：

CLASS lcl_class DEFINITION.
PUBLIC SECTION.
 METHODS: getdatareference RETURNING VALUE(rr_value) TYPE REF TO mara.
ENDCLASS.

CLASS lcl_class IMPLEMENTATION.
  METHOD getdatareference.
    DATA: ls_mara TYPE mara.
    rr_value = REF #( ls_mara ).
    SELECT SINGLE * FROM mara INTO rr_value->*.
  ENDMETHOD.
ENDCLASS.

START-OF-SELECTION.
  DATA(lcl)     = NEW lcl_class( ).
  DATA(lv_mara) = lcl->getdatareference( ).
  DATA(l_matnr) = lv_mara->matnr.

abap rel 740返回数据引用而不是基于表达式

2 个答案: