Idea: How about logical lines?

[Per Dalgas Jakobsen <pdj knaldgas dk>]

Just found that I can let Meld ignore code comments when comparing 
files, cool!

Now I'm looking for a way to let Meld ignore formatting of the code, and 
find only differences that matters for functionality.  I've skimmed 
through the mailing archive and hasn't found any discussion regarding 
such functionality.

Many software languages has a way to break a logical line into multiple 
physical lines, without affecting the resulting code. Some languages use 
backslash or the like, others allow any white-space location to have a 
line break, but end logical lines with a semicolon.

Is it a good idea to let Meld (and other diffs) find changes based on 
logical lines as an alternative to physical lines? Like a 
switch/preference to use logical lines instead (with options for 
line-continuation and line-end).
Have I overlooked some important considerations here?

~Per