From: Mikkel Damsgaard <mikkel_damsgaard@...>
Date: 2001-09-24T04:45:58+09:00
Subject: [ruby-talk:21610] Re: Please translate this easy snip of C++ to Ruby

> Phlip
> Ruby Users:
> 
> Ogle this awesome snip of C++:
> 
>         #define TRACE_(x) cout << #x ": " << x << endl
> 
> When you use that like this:
> 
>         TRACE_(y + z);
>         TRACE_(strAnimals);
>         TRACE_(__LINE__);
> 
> the program emits this:
> 
>         y + z: 12
>         strAnimals: Lemmings
>         __LINE__:  69
> 
> Mighty healthy and easy to write debug statements with, huh? 
> Saves a lot of 
> keystrokes, huh?
> 
> How do I do that, just as easy to call (meaning without extra 
> "" quotes or 
> anything), in Ruby?
> 

The closest I come is this:

def trace(expr)
  print expr + "=", eval(expr,TOPLEVEL_BINDING)
  puts
end

g = 2

trace("0")
trace("1+2")
trace("17+18")
trace("g")

But you dont get rid of the "'s (But who cares anyway ....)

> -- 
>   Phlip                          phlip_cpp@my-deja.com
> ============ http://c2.com/cgi/wiki?PhlIp ============
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