Metaprogramming with Merl

[Humberto Rodríguez Avila]

Hello Guys,

 I am new programming in Erlang and I don’t have much experience working with Meta-programming. In my learning process I found Merl. I saw some presentations and read about it. I have been try to use the API for building modules (merl_build), but I could not do an example,

-module(recursive). 

-export([fac/1]).

fac(N) when is_integer(N), N == 0 -> 1; 

fac(N) when is_integer(N), N > 0 -> N*fac(N-1).

 maybe due to my reduce knowledge about Erlang :(

I was wondering if someone have some examples of the use of this API?

Best regards, 

--- Humberto

[Jordan Wilberding]

Maybe try reading up here, as it was included with synatx_tools in Erlang 18.0: http://www.erlang.org/doc/man/merl.html

In order for people to better help you, could you show exactly what you tried to do, what you expected, and the errors you got?

Thanks!

Jordan

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[Humberto Rodríguez Avila]

Thanks Jordan! I just fixed my mistake in the creation of the clauses function and it works! :) 

However, I have been try to do the same thing using synatx_tools, but I have problems in to construct a simple import attribute. 

For example:

 -import(mymodule, [myfunction/0])

Thanks in advance!

Humberto