VSCode snippet to help with creation of Elixir GenServers and addition of handle_call and handle_cast and related client API functions

elixir-gen-server.code-snippets

{
		"GenServer Template": {
		"scope": "elixir",
        "prefix": "gs",
        "body": [
            "defmodule ${1}.${2} do",
            "\tuse GenServer",
            "",
            "\t# Client",
            "",
            "\tdef start_link(default) when is_list(default) do",
            "\t\tGenServer.start_link(__MODULE__, default)",
            "\tend",
            "",
            "\tdef push(pid, element) do",
            "\t\tGenServer.cast(pid, {:push, element})",
            "\tend",
            "",
            "\tdef pop(pid) do",
            "\t\tGenServer.call(pid, :pop)",
            "\tend",
            "",
            "\t# Server (callbacks)",
            "",
            "\t@impl true",
            "\tdef init(stack) do",
            "\t\t{:ok, stack}",
            "\tend",
            "",
            "\t@impl true",
            "\tdef handle_call(:pop, _from, [head | tail]) do",
            "\t\t{:reply, head, tail}",
            "\tend",
            "",
            "\t@impl true",
            "\tdef handle_cast({:push, element}, state) do",
            "\t\t{:noreply, [element | state]}",
            "\tend",
            "end",
            "",
            "# Remember to add this to your supervision tree, e.g.",
            "# children = [",
            "# ${1].${2}",
            "#    ...",
            "#]",
            "",
            "# Supervisor.start_link(children, strategy: :one_for_all)"
        ],
        "description": "GenServer Template"
    },
    "GenServer Cast": {
        "prefix": "gscast",
        "body": [
            "def ${1:function}(${2:args}) do",
            "\tGenServer.cast(__MODULE__, {:${1},{${2}}})",
            "end",
            "",
            "@impl true",
            "def handle_cast({:${1}, {${2}}}, state) do",
            "\t{:noreply, state}",
            "end",
            "${0}"
        ],
        "description": "GenServer cast function"
    },
    "GenServer Call": {
        "prefix": "gscall",
        "body": [
            "def ${1:function}(${2:args}) do",
            "\tGenServer.call(__MODULE__, {:${1},{${2}}})",
            "end",
            "",
            "@impl true",
            "def handle_call({:${1}, {${2}}}, state) do",
            "\t{:reply, state}",
            "end",
            "${0}"
        ],
        "description": "GenServer call function"
    }
}

To use, add the contents of this file to a 'New snippets file' under 'File / Preferences / User Snippets' in Visual Studio code.