Comprehension inheritance causes syntax error

[poweld]

jrsonnet version: 0.4.2

Using a comprehension to create an inheritable object causes a syntax error within the comprehension.

For example:

{
    updateInnerField1:: {
        [outerField]+: {
            innerField1: "from update",
        }
        for outerField in ["outerField1"]
    },

    o1: {
        outerField1: {
            innerField1: "original",
            innerField2: "original",
        },
    } + $.updateInnerField1,
}

The expected output is:

{
   "o1": {
      "outerField1": {
         "innerField1": "from update",
         "innerField2": "original"
      }
   }
}

but with jrsonnet we hit a syntax error on line 6, column 9 (beginning of the "for" in the comprehension):
syntax error, expected one of one of "(", ".", "[", "{", "}", <binary op>, <whitespace>, got "f"

Changing the line [outerField]+: { to [outerField]: { fixes the syntax issue, but of course it changes the results, completely overwriting the object instead of only overwriting the value for innerField1.

Additionally, unfurling the comprehension also resolves the issue, so it seems like the combination of using a derived field ([outerField]) and inheritance using +: causes the issue.

The same syntax error arises when attempting the same but with a list instead of an object:

{
    updateOuterField1:: {
        [outerField]+: ["from update"],
        for outerField in ["outerField1"]
    },

    o1: {
        outerField1: ["original"],
    } + $.updateOuterField1,
}

where we expect the output to be

{
   "o1": {
      "outerField1": [
         "original",
         "from update"
      ]
   }
}

[poweld]

I just built from source at commit e70aa7d and found this issue is resolved.

[JarvisCraft]

Thanks for your activity and the error report! Yup, the fix will arrive in 0.5.0 which is currently in its later development phase.