Snippets

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SNIPPETS

A snippet is a sort of code template or skeleton that allows you to quickly set up a commonly used code fragment like a subprocedure definition (in ILE RPG).

This differs from code templates because the code template is invoked by the code completion facility Ctrl+Space.

Code completion with templates requires you to start keying the 'trigger' (in RPG, usually the operation code.)

With snippets, you can have Lpex include anything at all, with no trigger needed aside from the double click on the selected snippet.


Snippets View

original post [1]

To open a snippets view:

  • Window -> Show view -> Other -> Basic -> Snippets

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Create a Snippets Category

original post [2]

  • You only need to create a Category once, conceptually its like CRTSRCPF.
  • Create as many Categories as you wish.
  • -Right-click in the Snippets view and select Customize...
  • -Click the New button and create a New Category
  • -Click the New button and create a New Item
  • -Click on the snippet and then click the New button that is adjacent to the Variables list
  • -Enter your snippet and use the Insert Variable Placeholder button to add the variable

alternatively use the copy, right click process below, its easier.

Use snippets for RPGLE, CLLE, DSPF and PRTF source members.


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Snippets RPG

original post [3]

You can use the snippets to insert stuff into your program.

To create your own RPG snippets,

  • you can open the view in RSE or iSeries Editing perspective,
  • select your source,
  • and right click / Past in the snippets view, into your Previously created Category.

It will then create a new template.

To use the snippet;

  • Open a source member for editing.
  • Place the cursor where you want the code.
  • Go to the Snippets view, to the Category where the snippet is.
  • Double click on the snippet and it appears in the source


original post [4]

Another method is to create a Snippet.

  1. Open the Snippets view.
  2. Create a new 'Drawer' for your snippets.
  3. Copy some source.
  4. Right-click in your snippet drawer, paste.
  5. This will bring up the snippet creation wizard.

Long Procedure Name

original post [5]

How do I get the PR to stay at the same column position, irrespective of what name I use for the procedure ?

Use:

D ${Procedure}...
                          PR  

Otherwise the procedure name has to always be 12 characters in length. With the elipsis (...) it can be up to 60 odd characters in length.


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Examples

Subprocedure skeleton:

Lpex snippet rpg subprocedure.JPG


Subprocedure skeleton

     * ${proc_comment}
    p ${proc_name}        b
    d ${proc_name}        pi            10i 0
    d  ${parm_name}                      1a
    
    d rc                            10i 0 inz
     
    c/free
       return rc;
     /end-free
    p                 e

EXEC SQL

ref [6]

    C/EXEC SQL
    C+ SELECT * FROM mylib/myfile
    C/END-EXEC
free
 exec sql select * from mylib/myfile;


Open Cursor and Fetch Mainline

ref [7]

    H ActGrp(*CALLER)
    H DftActGrp(*NO)
    D OpenCursor      PR              n
    D FetchCursor     PR              n
    D CloseCursor     PR              n
    D MyLib           s             10a
    D MyFile          s             10a
     /free
      *inlr=*on;
      if not OpenCursor();
        // perform error routine to alert the troops
        // ...
      Else;
        Dow FetchCursor();
          // putting the fetchcursor on the do loop allows the user of
          // iter, and thus iter will not perform an infinite loop
          // normal processing here...
        EndDo;
        CloseCursor();
      EndIf;
      return;
     /end-free

Open Cursor Procedure

ref [8]

    P OpenCursor      B
    D OpenCursor      PI                  like(ReturnVar)
    D ReturnVar       s               n
      // The immediately following /EXEC SQL is SQL's version of RPG's H Spec
      // It is never executed.  Just used at compile time.
    C/EXEC SQL
    C+ Set Option
    C+     Naming    = *Sys,
    C+     Commit    = *None,
    C+     UsrPrf    = *User,
    C+     DynUsrPrf = *User,
    C+     Datfmt    = *iso,
    C+     CloSqlCsr = *EndMod
    C/END-EXEC
    C/EXEC SQL
    C+ Declare C1 cursor for
    C+  Select System_Table_Schema as library,
    C+         System_Table_Name   as file
    C+  from qsys2/systables
    C/END-EXEC
    C/EXEC SQL
    C+ Open C1
    C/END-EXEC
     /free
      Select;
        When SqlStt='00000';
          return *on;
        Other;
          return *off;
      EndSl;
     /end-free
    P OpenCursor      E

Fetch Cursor Procedure

ref [9]

    P FetchCursor     B
    D FetchCursor     PI                  like(ReturnVar)
    D ReturnVar       s               n
    C/EXEC SQL
    C+ Fetch C1 into :MyLib, :MyFile
    C/END-EXEC
     /free
      Select;
        When sqlstt='00000';
          // row was received, normal
          ReturnVar=*on;
        When sqlstt='02000';
          // same as %eof, sooner or later this is normal
          ReturnVar=*off;
        Other;
          // alert the troops!
          ReturnVar=*off;
      EndSl;
      return ReturnVar;
     /end-free
    P FetchCursor     E

Close Cursor Procedure

ref [10]

    P CloseCursor     B
    D CloseCursor     PI                  like(ReturnVar)
    D ReturnVar       s               n
    C/EXEC SQL
    C+ Close C1
    C/END-EXEC
     /free
      Select;
        When sqlstt='00000';
          // cursor was closed, normal
          ReturnVar=*on;
        Other;
          // alert the troops!
          ReturnVar=*off;
      EndSl;
      return ReturnVar;
     /end-free
    P CloseCursor     E 


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Exporting and importing snippets

ref [[11]]

Snippets can be transferred to another PC by the process of exporting and importing.

You export on the PC you want to copy the snippets from, and import on the PC you want to copy them to.

Exporting

  • In the Snippets view right click and select Customize
  • Select your custom snippet category
  • Select Export (top of the category list, left side)
  • See the 'Save as...' dialogue box, remember the file name you chose!
  • Copy/FTP/email that XML file to the target PC

Importing

  • Get a snippets XML file some place where it's available to WDSC
  • In the Snippets view right click and select Customize
  • Select your custom snippet category
  • Select Import (top of the category list, left side)
  • See the 'Open...' dialogue box.
  • Select the XML file to import

Snippets XML structure

<?xml version="1.0" encoding="UTF-16"?>
<snippets>
    <category filters="*" id="category_1185380127750" initial_state="0" label="RPG" largeicon="" smallicon="">
        <description/>
        <item category="category_1185380127750" class="" editorclass="" id="item_1207666311828" label="subprocedure" largeicon="" smallicon="">
            <description><![CDATA[Subprocedure skeleton]]></description>
            <content><![CDATA[
      * ${proc_comment}
     p ${proc_name}        b
     d ${proc_name}        pi            10i 0
     d  ${parm_name}                      1a
     
     d rc                            10i 0 inz

     c/free
        return rc;
      /end-free
     p                 e]]></content>
            <variable default="Description of procedure" id="name_3" name="proc_comment">
                <description><![CDATA[Description]]></description>
            </variable>
            <variable default="new_parm" id="name_2" name="parm_name">
                <description><![CDATA[Parameter name]]></description>
            </variable>
            <variable default="new_proc" id="name_1" name="proc_name">
                <description><![CDATA[Procedure name]]></description>
            </variable>
        </item>
    </category>
</snippets>


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External links

The official WDSC web page [12]

The WDSC Developer blog [13]

WDSC tags on del.ici.ous [14]

Categories