[erlang-questions] erl_parse vs erl_syntax difference

[Hans Bolinder]

[Karlo Kuna:]
> for example if we parse form (i'm omitting scan pass here)
> "-type a() :: tuple()."  we get {ok,{attribute,1,type,{a,{type,1,tuple,any},[]}}}
>
> interesting part here is:
>      {type,1,tuple,any}
>
> as far as i can see there no method how to construct valid tuple or
> map type annotations using erl_syntax. Specifically if one construct
> type annotation for tuple and use erl_syntax:revert/1 one gets:
>
>       {type,1,tuple,any_size}
>
> any_size =/= any
>
> is this a bug??

Thanks for pointing it out. A fix, see commit 1b91284, will be
included in Erlang/OTP 21.1.

Best regards,

Hans Bolinder, Erlang/OTP team, Ericsson

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