[Collections\append] no magic method for object values should be an error

https://github.com/arturo-lang/arturo/blob/411617a1906063cf0adfd3ac06804dc4b29403a0/src/library/Collections.nim#L136
                    elif yKind == Integer:
                        push(newBinary(x.n & numberToBinary(y.i)))
                elif xKind == Object:
                    if x.magic.fetch(AppendM):
                        mgk(@[x, y]) # value already pushed
                    else:
                        # TODO(Collections\append) no magic method for object values should be an error
                        #  labels: library, oop, error handling
                        discard
                else:
                    if yKind==Block:
                        push newBlock(x.a & y.a)
                    else:
                        push newBlock(x.a & y)

    builtin "array",
        alias       = at,
        op          = opArray,
        rule        = PrefixPrecedence,
        description = "create array from given block, by reducing/calculating all internal values",
        args        = {
            "source": {Any}
        },
        attrs       = {
            "of"    : ({Integer,Block},"initialize an empty n-dimensional array with given dimensions")
        },
        returns     = {Block},
        example     = """
            none: @[]               ; none: []
            a: @[1 2 3]             ; a: [1 2 3]

            b: 5
            c: @[b b+1 b+2]         ; c: [5 6 7]

            d: @[
                3+1
                print "we are in the block"
                123
                print "yep"
            ]
            ; we are in the block
            ; yep
            ; => [4 123]
            ..........
            ; initializing empty array with initial value
            x: array.of: 2 "done"
            inspect.muted x
            ; [ :block
            ;     done :string
            ;     done :string
            ; ]
            ..........
            ; initializing empty n-dimensional array with initial value
            x: array.of: [3 4] 0          ; initialize a 3x4 2D array
                                            ; with zeros
            ; => [[0 0 0 0] [0 0 0 0] [0 0 0 0]]
        """:
            #=======================================================
            if checkAttr("of"):
                if aOf.kind == Integer:
                    let size = aOf.i
                    let blk:ValueArray = safeRepeat(x, size)
                    push newBlock(blk)
                else:
                    var val: Value = copyValue(x)
                    var blk: ValueArray

                    for item in aOf.a.reversed:
                        requireValue(item, {Integer})
                        blk = safeRepeat(val, item.i)
                        val = newBlock(blk.map((v)=>copyValue(v)))

                    push newBlock(blk)
            else:
                if xKind==Range:
                    push(newBlock(toSeq(items(x.rng))))
                else:
                    if xKind==Block:
                        let stop = SP
                        execUnscoped(x)
                        let arr: ValueArray = sTopsFrom(stop)
                        SP = stop

                        push(newBlock(arr))
                    elif xKind==String:
                        let stop = SP
                        let (_{.inject.}, tp) = getSource(x.s)

                        if tp!=TextData:
                            execUnscoped(doParse(x.s, isFile=false))
                        else:
                            RuntimeError_FileNotFound(x.s)
                        let arr: ValueArray = sTopsFrom(stop)
                        SP = stop

                        push(newBlock(arr))
                    else:
                        push(newBlock(@[x]))

    builtin "chop",
        alias       = unaliased,
9395e531e7f48d0f245cb02870b3dc89f4d6df85
arturo-lang / arturo

[Collections\append] no magic method for object values should be an error #1361
