From: Austin McDonald <austin-mcdonald@...>
Date: 2004-06-12T16:47:32+09:00
Subject: Re: Any way to get the calling method's binding?

Right.  I'm out of it at the moment; got wrapped up in following the 
idea trails and wound up where Gavin started... my apologies.  I think 
I'll get some sleep.

Austin

Austin McDonald wrote:

> Excellent; I had the right idea, but yours is much cleaner.
>
> For giggles, and maybe b/c it's a little more explicit, you could use 
> Kernel#binding to make it obvious what's going on:
>
> def trace(expr, b)
>    LOG.debug "#{expr} = #{eval(expr, b)}"
> end
>
> def something()
>    x=5
>    y=7
>    trace "x+y", binding
> end
>
> something # ==> x+y = 12
>
> Although I like Joel's version better, I think this is a little clearer.
>
> Austin
>
>
>
> Joel VanderWerf wrote:
>
>> Austin McDonald wrote:
>>
>>> In the meantime, you could do this:
>>>
>>> def trace (expr)
>>>    LOG.debug "#{expr} = #{yield expr}"
>>> end
>>>
>>> def something
>>>    x=5
>>>    x=7
>>>    trace "x+y", {|n| eval n}
>>> end
>>>
>>> something => 12
>>
>>
>>
>> def trace(&block)
>>   expr = block.call
>>   puts "#{expr} = #{eval(expr, block)}"
>> end
>>
>> def something
>>   x = 5
>>   y = 7
>>   trace {"x + y"}
>> end
>>
>> something   # ==> x + y = 12
>>
>>
>>
>
>