[erlang-questions] module_info

[Bengt Kleberg]

On 2007-05-19 16:27, Saifi Khan wrote:
> Hi:
> 
> Started working through the 'Getting started with Erlang' examples.
> 
> There are two module_info functions that seem to be defined
> for every module.
>  module_info/0  
>  module_info/1
> 
> What is the purpose of module_info function ?

they give you information about the module (from the compiler).


> On invocation the following info is shown for example
> 2> tut:module_info().
> [{exports,[{double,1},{module_info,0},{module_info,1}]},
>  {imports,[]},
>  {attributes,[{vsn,[273405249567272843094678604656701543356]}]},
...deleted
> 
> What is the interpretation of the vsn entry in the attributes field ?
if you have an entry like this:
-vsn('1.0.0').
in your module, this value will be available from module_info().
otherwise the compiler creates a value.


bengt
-- 
Those were the days...
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