How to use a parent node inside a dynamic node?

[medwatt]

I have the snippet below. I want to use a repeat node inside the dynamic node that depends on a node outside of the dynamic node. I've illustrated what I mean in the snippet below.

s(
    { trig = "when(%d+)", dscr = "conditional signal assignment", regTrig = true },
    fmta(
        [[
        <> <<= <> when <> = <> else<>
        ]],
        {
            i(1, "output_signal"),
            i(2, "output_signal_value_1"),
            i(3, "select_signal"), -----------> I want to use this node inside the dynamic node
            i(4, "select_signal_value_1"),
            d(5, function(_, snip)
                local num_cases = tonumber(snip.captures[1]) - 1
                local nodes = {}
                for j = 2, num_cases do
                    local case_node = isn(j-1,
                        fmta(
                            [[
                            <><> when <> = <> else
                            ]],
                            {
                                t({"",""}),
                                i(1, "output_signal_value_"..j),
                                i(2, "select_signal"), --<------------- I want to use the captured text from parent here as a rep node
                                i(3, "select_signal_value_"..j),
                            }
                        ),
                        "$PARENT_INDENT"
                    )
                    table.insert(nodes, case_node)

                    if j ~= num_cases then
                        table.insert(nodes, t({""}))
                    else
                        table.insert(nodes, sn(j, { t({"", ""}), i(1, "output_value_"..j), t({";"}) }))
                    end
                end
                return isn(nil, nodes, "$PARENT_INDENT\t")
            end, nil),
        }
    )
),

Fixed code below in case someone stumbles upon this in the future.

s(
    { trig = "when(%d+)", dscr = "conditional signal assignment", regTrig = true },
    fmta(
        [[
        <> <<= <> when <> = <> else<>
        ]],
        {
            i(1, "output_signal"),
            i(2, "output_signal_value_1"),
            i(3, "select_signal", {key = "select-key"}),
            i(4, "select_signal_value_1"),
            d(5, function(_, snip)
                local num_cases = tonumber(snip.captures[1]) - 1
                local nodes = {}
                for j = 2, num_cases do
                    local case_node = isn(j-1,
                        fmta(
                            [[
                            <><> when <> = <> else
                            ]],
                            {
                                t({"",""}),
                                i(1, "output_signal_value_"..j),
                                f(function(args) return args[1] end, k("select-key") ),
                                i(2, "select_signal_value_"..j),
                            }
                        ),
                        "$PARENT_INDENT"
                    )
                    table.insert(nodes, case_node)

                    if j ~= num_cases then
                        table.insert(nodes, t({""}))
                    else
                        table.insert(nodes, sn(j, { t({"", ""}), i(1, "output_value_"..j), t({";"}) }))
                    end
                end
                return isn(nil, nodes, "$PARENT_INDENT\t")
            end, nil),
        }
    ),
),

[L3MON4D3]

Oh nice, a usecase for key_indexer :D

[medwatt]

Thanks! That did it.