DMN 1.6b1 RTF Avatar
  1. OMG Issue

DMN16 — Friendly enough cohersion to string

  • Key: DMN16-71
  • Status: open  
  • Source: camunda.com ( Mr. Nico Rehwaldt [X] (Inactive))
  • Summary:

    Currently concatenating strings is not intuitive to users, as I always have to convert non string values to strings using the built-in `string` function.

    So

    ```
    "Today is " + now() = null
    ```

    In order to yield the actual string you explicitly convert `now()` to its string representation:

    ```
    "Today is " + string(now()) = "Today is 2021-12-12"
    ```

    A more user friendly behavior would be to coherse the second argument to string if the first argument is already a string. This always yields a string representation of the thing. If it is not what I desire I can use custom stringification mechanisms explicitly.

    We'd need to amend the Table 57 (page 128, https://www.omg.org/spec/DMN/1.4/Beta1/PDF) to support such cohersion.

    Additional details on this case can be found in https://github.com/dmn-tck/tck/issues/538 (DMN TCK issue on this topic).

  • Reported: DMN 1.4b1 — Thu, 19 Jan 2023 12:50 GMT
  • Updated: Mon, 13 May 2024 00:40 GMT