On Thu, 28 Mar 2013 17:08:46 -0700
Mark Engelberg <mark.engelb...@gmail.com> wrote:

> Bug or feature?

Certainly a feature for complex patterns with whitespace and embedded
comments.

For example, the following regexp parses line in Combined Log Format used
by Apache httpd and other web servers:

(def clf-pattern
  #"(?x)^
    (\S*)\s                          # remote host
    (\S*)\s                          # remote logname
    (\S*)\s                          # remote user
    \[([^\]]+)\]\s                   # time the request was received
    \"([^\"\\]*(?:\\.[^\"\\]*)*)\"\s # first line of request
    (\S*)\s                          # status
    (\S*)\s                          # size of response in bytes
    \"([^\"\\]*(?:\\.[^\"\\]*)*)\"\s # referer
    \"([^\"\\]*(?:\\.[^\"\\]*)*)\"   # user-agent
    \s*$")

You probably would not want it to be printed in a single line.

--
Mikhail

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