dbg match spec

[Ulf Wiger (AL/EAB)]

Sorry Chandru, I can't figure it out either.

/Uffe

> -----Original Message-----
> From: owner-erlang-questions@REDACTED
> [mailto:owner-erlang-questions@REDACTED]On Behalf Of chandru
> Sent: den 3 oktober 2005 12:19
> To: erlang-questions@REDACTED
> Subject: dbg match spec
> 
> 
> Hi,
> 
> If I had code like this:
> 
> -module(dbg_test).
> -export([test/1]).
> 
> test(N) when integer(N) ->
>     io:format("Integer -> ~p~n", [N]);
> test({'A', X, Y}) ->
>     io:format("A: X -> ~p, Y -> ~p~n", [X,Y]);
> test(L) ->
>     io:format("L -> ~p~n", [L]).
> 
> how would I write a dbg command to print out a trace when the second
> clause is matched?
> 
> I've tried: 	
> 
> dbg:tpl(dbg_test, test, 1, 
> [{'$1',[{'==',{element,1,'$$'},'A'}],[call]}]).
> 
> but it doesn't work. whereas this does:
> 
> dbg:tpl(dbg_test, test, 1, [{'_',[],[call]}]).
> 
> but it is not quite what I want...I want to single out the 
> second clause.
> 
> cheers
> Chandru
>