(AKA Perverse Perlish Notation)

See the specs for it (half-hearted documentation) at my web site -- note: Netscape seems to feel my CSS isn't worthy of being rendered, while MSIE and Mozilla find it just fine.

Expect a parser within a week. It's actually far easier to parse RPN than it is regular Perl, since nested things become flat (like the Earth): 
$foo{bar}[ blat(\%foo) ] = { a => 'fool' };

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is represented in RPN as: 
foo$ bar {} foo%\ blat [] (a => 'fool') {} =;

# or, if you feel better binding things a little closer...

foo$ bar{} (foo%\ blat)[] (a => 'fool'){} =;

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Oh, note that: 
foo$ x$[]  # $foo[$x]

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is COMPLETELY different from: 
foo$ x$[] =  # $foo = [$x]

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But the parser will know how to differentiate, due to syntax rules: 
# what is:
foo$ x$[] y$[] =;

# is it...
$foo[$x] = [$y];

# or...
$foo = [$x][$y];

# it can't be the second (since that's a syntax error)

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japhy -- Perl and Regex Hacker

In reply to Reverse Perlish Notation by japhy

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