[vscode] 创建erlang gen_serve 文件快捷方式

点击左下角功能按钮，代码片段，新建全局代码片段，然后输入自定义内容就可以

{
    "Erlang gen_server": {
        "prefix": "genserver",
        "body": [
            "-module(${1:module_name}).",
            "-behaviour(gen_server).",
            "",
            "%% API",
            "-export([start_link/0]).",
            "",
            "%% gen_server callbacks",
            "-export([init/1, handle_call/3, handle_cast/2, handle_info/2,",
            "         terminate/2, code_change/3]).",
            "",
            "-record(state, {}).",
            "",
            "%%%===================================================================",
            "%%% API",
            "%%%===================================================================",
            "",
            "start_link() ->",
            "    gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).",
            "",
            "%%%===================================================================",
            "%%% gen_server callbacks",
            "%%%===================================================================",
            "",
            "init([]) ->",
            "    {ok, #state{}}.",
            "",
            "handle_call(Request, _From, State) ->",
            "    lager:error(\"Unhandled call: ===> ~p\", [Request]),",
            "    Reply = ok,",
            "    {reply, Reply, State}.",
            "",
            "handle_cast(Msg, State) ->",
            "    lager:error(\"Unhandled cast: ===> ~p\", [Msg]),",
            "    {noreply, State}.",
            "",
            "handle_info(Info, State) ->",
            "    lager:error(\"Unhandled info: ===> ~p\", [Info]),",
            "    {noreply, State}.",
            "",
            "terminate(Reason, _State) ->",
            "    lager:error(\"Server terminated: ===> ~p\", [Reason]),",
            "    ok.",
            "",
            "code_change(_OldVsn, State, _Extra) ->",
            "    {ok, State}."
        ],
        "description": "Template for an Erlang gen_server"
    }
}