String.Chars not implemented.

[Alex Shneyderman]

I am a bit confused by all the 

** (Protocol.UndefinedError) protocol String.Chars not implemented for Tunnel.Main.Parameters[verbose: true, hostname: "127.5.176.4", port: 29000, tunnels: 1, rate: 10]

Why can not elixir figure out how to print a record ? Do I have to defimp String.Chars, for: Tunnel.Main.Parameters ? Or is there a simpler way?

Cheers,

Alex

[José Valim]

You need to `inspect value` or implement the protocol.

José Valim

www.plataformatec.com.br

Skype: jv.ptec

Founder and Lead Developer

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[Alex Shneyderman]

IO.inspect params

produces 

08:12:17 goulash_client > ./ts_client --verbose --hostname=127.5.176.4 --port=29000

Tunnel.Main.Parameters[verbose: true, hostname: "127.5.176.4", port: 29000, tunnels: 1, rate: 10]

Tunnel.Main.Parameters[verbose: true, hostname: "127.5.176.4", port: 29000, tunnels: 1, rate: 10]

Why is it doubled ? I do use mix escriptize maybe that has something to do with the fact? 

Thanks,

Alex.

[José Valim]

Note IO.inspect returns the given argument. This is very handy because you can insert it in the middle of a "pipeline" for example:

foo

|> do_this

|> IO.inspect

|> do_that

So it is doubled probably because you are printing and returning the value itself which cases it to be printed again.

José Valim

www.plataformatec.com.br

Skype: jv.ptec

Founder and Lead Developer