[erlang-questions] pattern matching & map

[Oleg]

On Mon, Nov 26, 2018 at 06:58:48PM +0900, zxq9@REDACTED wrote:
> On 2018年11月26日月曜日 12時21分25秒 JST Oleg wrote:
> >   Hi, all.
> > 
> > I try to do the pattern matching in a function definition with maps:
> > 
> > add_prms([{Name, Val}|T], #{Name := Vals} = Prms) ->
> > 
> > But erlc says me:
> > 
> > variable 'Name' is unbound
> > 
> > Is this is not supported yet?
> 
> You can match on literals as maps keys in a function head, but not dynamic values.
> 
> I believe you can match on dynamic values within a function body in a case:
> 
> 
>   add_prms([{Name, Val} | T], Prms) ->
>       case Prms of
>           #{Name := Vals} -> % ...
>   % ...

Already done like this :-), but thought that i do something wrong with map pattern matching in function.

Thanks!

-- 
Олег Неманов (Oleg Nemanov)