"Play a jingle at a fixed time"

[ScuttleSE]

I'm trying to use the example from the cookbook that looks like this

radio = switch([(predicate.activates({ 0m-5m }), jingles), ({ true }, playlist)])

As I understand it, it creates a source named "radio", and once an hour, it plays one entry from the playlist "jingles" instead of the playlist "playlist".

When I implement it into my flow it does not work.

gbsfm = switch([(predicate.activates({ 0m-5m }), jingles), ({ true }, gbsfm_normal)])
Error 5: this value has type
  _ * source(audio=?A, video=?B, midi=?C)
  .{
    time : () -> float,
    shutdown : () -> unit,
    fallible : bool,
    skip : () -> unit,
    seek : (float) -> float,
    is_active : () -> bool,
    is_up : () -> bool,
    log : 
    {level : (() -> int?).{set : ((int) -> unit)}
    },
    self_sync : () -> bool,
    duration : () -> float,
    elapsed : () -> float,
    remaining : () -> float,
    on_track : ((([string * string]) -> unit)) -> unit,
    on_leave : ((() -> unit)) -> unit,
    on_get_ready : ((() -> unit)) -> unit,
    on_shutdown : ((() -> unit)) -> unit,
    on_metadata : ((([string * string]) -> unit)) -> unit,
    last_metadata : () -> [string * string]?,
    is_ready : () -> bool,
    id : () -> string,
    current : () -> request?,
    set_queue : ([request]) -> unit,
    add : (request) -> bool,
    queue : () -> [request],
    fetch : () -> bool,
    push : ((request) -> unit)
    .{uri : ((string) -> unit)
    },
    length : (() -> int)
  }
but it should be a subtype of the type of the value at /home/liq/ices.liq, line 58, char 59-83
  _ * _.{selected : _}

I don't even know what the errormessage means... The two sources "jingles" and "gbsfm_normal" are two working sources. What does the errormessage refer to when it says "this value"? And it should be a subtype of the value at like 58, char 59-83. Is that a subtype of true? Or a subtype of gbsfm_normal? If so, what kind of subtype?

[martinkirch]

Hello, Sometimes the parser is not inferring types correctly. You can hint the type by appending :source :

gbsfm = switch([(predicate.activates({ 0m-5m }), jingles:source), ({ true }, gbsfm_normal:source)])