use YAPE::Regex::Explain;

$regex = qr/.*([\$#\%>~]|\@\w~\$|\\\[\\e\[0m\\\] \[0m)\s?/;

print YAPE::Regex::Explain->new($regex)->explain;

[download]
__OUTPUT__

The regular expression:

(?-imsx:.*([\$#%>~]|\@\w~\$|\\\[\\e\[0m\\\] \[0m)\s?)

matches as follows:

NODE                     EXPLANATION
----------------------------------------------------------------------
(?-imsx:                 group, but do not capture (case-sensitive)
                         (with ^ and $ matching normally) (with . not
                         matching \n) (matching whitespace and #
                         normally):
----------------------------------------------------------------------
  .*                       any character except \n (0 or more times
                           (matching the most amount possible))
----------------------------------------------------------------------
  (                        group and capture to \1:
----------------------------------------------------------------------
    [\$#%>~]                 any character of: '\$', '#', '%', '>',
                             '~'
----------------------------------------------------------------------
   |                        OR
----------------------------------------------------------------------
    \@                       '@'
----------------------------------------------------------------------
    \w                       word characters (a-z, A-Z, 0-9, _)
----------------------------------------------------------------------
    ~                        '~'
----------------------------------------------------------------------
    \$                       '$'
----------------------------------------------------------------------
   |                        OR
----------------------------------------------------------------------
    \\                       '\'
----------------------------------------------------------------------
    \[                       '['
----------------------------------------------------------------------
    \\                       '\'
----------------------------------------------------------------------
    e                        'e'
----------------------------------------------------------------------
    \[                       '['
----------------------------------------------------------------------
    0m                       '0m'
----------------------------------------------------------------------
    \\                       '\'
----------------------------------------------------------------------
    \]                       ']'
----------------------------------------------------------------------
                             ' '
----------------------------------------------------------------------
    \[                       '['
----------------------------------------------------------------------
    0m                       '0m'
----------------------------------------------------------------------
  )                        end of \1
----------------------------------------------------------------------
  \s?                      whitespace (\n, \r, \t, \f, and " ")
                           (optional (matching the most amount
                           possible))
----------------------------------------------------------------------
)                        end of grouping
----------------------------------------------------------------------

[download]

Let me show you my (colourful) command prompt... :-) which looks like: ($hostname)$fullpath> 
export PS1="\[\033[1;37m\](\[\033[1;32m\]`uname -n`\[\033[1;37m\])\[\0
+33[1;36m\]\$PWD\[\033[1;37m\]>\[\033[0m\] "

# ANSI colour commands
#   \[\033[1;37m\]  => set colour to white (37)
#   \[\033[1;32m\]  => set colour to green (32)
#   \[\033[1;36m\]  => set colour to cyan  (36)
#   ...
#   \[\033[0m\]     => set colour back to normal

[download]

In reply to Re: This looks like someone sneezed and hit the keyboard by Roger
in thread This looks like someone sneezed and hit the keyboard by Anonymous Monk

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