in reply to Re^3: Why is variable length lookahead implemented while lookbehind is not?
in thread Why is variable length lookahead implemented while lookbehind is not?

That is what is discussed at Variable-length lookbehind at dev.perl.org. The suggestion to write the variable-length lookbehind in right-to-left fashion was rejected as being obscure. The Perl regex-engine will have to do this reversing itself, which is not always possible or easy to do.

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

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