[erlang-questions] Pretty printing records from a program

Ulf Wiger (TN/EAB) <>
Thu Sep 28 18:59:38 CEST 2006


 
So how about this post then?
 
http://www.erlang.org/ml-archive/erlang-questions/200605/msg00377.html
 
I made a small modification and posted a new version in the User
Contributions forum at trapexit.org.
 
An example of a pretty-print function for your records would then be:
 
pp(Rec) ->
    RF = fun(R,L) when R == element(1,Rec) ->
                 Flds = '#info-'(Rec),
                 true = (L == length(Flds)),
                 Flds
         end,
    io:fwrite([io_lib_pretty:print(Rec, RF),"\n"]).

The function '#info-'/1 is an introspective function returning a list of
attribute names for the given record - provided that the argument is of
one of the exported record types.

BR,
Ulf W

(Next time, I hope to contribute something that _isn't_ a parse
transform...)

________________________________

	From: 
[mailto:] On Behalf Of Joe Armstrong
	Sent: den 28 september 2006 15:30
	To: 
	Subject: [erlang-questions] Pretty printing records from a
program
	
	
	I have a record X in a program and all the .hrl files etc.
	
	How do I pretty print this from a program
	
	I know I can do it in the shell with
	
	> rr("*.hrl"),
	> rp(X).
	
	But I want to do this from my program 
	
	I have read 
	
	
http://www.erlang.org/ml-archive/erlang-questions/200508/msg00140.html
	
	
	But was none the wiser
	
	/Joe
	
	





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