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Status Delivered
Workspace IBM i
Categories Languages - RPG
Created by Guest
Created on Mar 7, 2018

Enhance strong typing specs

ILE and especially RPG should provide means to force strong typing to satisfy specific requirements. There is a medium urgency for parameters declared CONST, but, in my opinion, there is an urgent requirement for type checking regarding data structures as parameter and return values alike.

Use Case:

Currently there is no option to rule out runtime-errors on numeric fields that are declared too short to hold longer target values or data structures at all.

Idea priority Medium
  • Guest
    Nov 15, 2019

    IBM believes that the request described has been solved and is available with the enhancement that provides OPTIONS(*EXACT) for prototyped parameters.

    This enhancement is available with the following PTFs:

    - 7.3 TGTRLS(*CURRENT) - SI71534
    - 7.4 TGTRLS(*CURRENT) - SI71536
    - 7.4 TGTRLS(*PRV) - SI71538

    See the "What's new since 7.3" or "What's new since 7.4" sections of the ILE RPG Reference. (The inforomation is the same in both manuals.)

  • Guest
    Jul 6, 2018

    Thank you for the detailed explanation. IBM will use this request as input to planning but no commitment is made or implied. This request will be updated in the future if IBM implements it. IBM will use votes and comments from others in the community to help prioritize this request.

    If this requirement is implemented, it would likely be on a parameter-by-parameter basis, with a new parameter option OPTIONS(*EXACT), which would require the passed parameter to be an exact match for the parameter even if CONST or VALUE was coded, and it would also mean stricter rules for a parameter passed by reference which allows longer strings or data structures to be passed. For a parameter defined as a data structure, OPTIONS(*EXACT) would require the passed parameter to be related by LIKEDS to the prototyped parameter.

  • Guest
    May 3, 2018

    Attachment (Use case): The attached file should give a brief explanation of why more strict and strong typing rules are required. Basically the whole thing is heading in the same direction with Thomas Raddatz' request for bringing the back the requirement for Prototyping exported functions.

  • Guest
    Apr 4, 2018

    Please provide a detailed example of the type of error that should be flagged by the compiler.

  • Guest
    Mar 8, 2018

    Does that really qualify as type checking? I thought ILE RPG was already a heavily typed language in the context of variable definition so aren't you really looking for better feedback reporting of your error condition?