inheritance substitution with array concatenation does not work

[boekhold]

With the following input:

x-top {
  arr = [
    one
    two
    three
  ]
}

top: ${x-top} {
  arr += "four"
}

When I am parsing this and converting to JSON, the output I am expecting to see is:

{
    "top" : {
        "arr" : [
            "one"
            "two"
            "three"
            "four"
        ]
    },
    "x-top" : {
        "arr" : [
            "one",
            "two",
            "three"
        ]
    }
}

but the actual result I am seeing is:

{
    "top" : {
        "arr" : [
            "four"
        ]
    },
    "x-top" : {
        "arr" : [
            "one",
            "two",
            "three"
        ]
    }
}

If I modify my input to the following, which I view as equivalent (but can't use in my real-world case):

top : {
  arr : [
    one
    two
    three
  ]
} {
  arr += four
}

I am getting the expected result.

[havocp]

Unfortunately substitutions don’t have lexical scope they are always global references, see #40, #160

The += is sugar for a substitution and expands to arr = ${top.arr} [“four”] I believe.

[havocp]

Nevermind that may be a confused answer, late at night.

Needs debugging.

[thomschke]

I run into the same problem when I substitute default values:

default {
}

test = ${default}{
  array += "0"
}

test {
  array += "1"
}

test {
  array += "2"
}

getConfig("test") --> Config(SimpleConfigObject({"array":["2"]})) ???

[thomschke]

The Problem occurs after the default value substitution:

test {
  array += "0"
}

test {
  array += "1"
}

default {
}

test = ${test}${default}{
}

test = ${test}{
  array += "2"
}

test = ${test}{
  array += "3"
}

getConfig("test) --> Config(SimpleConfigObject({"array":["0","1","3"]}))

[thomschke]

test {
  array += "0"
}

test {
  array += "1"
}

default {
}

test = ${default}{
}

test = ${test}{
  array += "2"
}

test = ${test}{
  array += "3"
}

test {
  array += "4"
}

test {
  array += "5"
}

getConfig("test) --> Config(SimpleConfigObject({"array":["5"]}))