regex puzzle

[matt neuburg <matt at tidbits dot com>]

Please explain the following phenomenon.

(1) Control case (works as expected):

  dim s,p as string
  dim r as regex
  s = "Hello, Matt!"
  p = "[a-z]+"
  r = new regex
  r.searchpattern = p
  msgbox r.search(s).subExpressionstring(0)
  
Result: "Hello". This is what I expect.

(2) Experiment (I don't understand the results here):

  dim s,p as string
  dim r as regex
  s = "Hello, Matt!"
  p = "[a-z]+"
  s = convertEncoding(s, encodings.macroman)
  p = convertEncoding(s, encodings.macroman) // ****
  r = new regex
  r.searchpattern = p
  msgbox r.search(s).subExpressionstring(0)
  
Result: "Hello, Matt!" Why? It is only the starred line that makes the
difference. I want to do the search using a MacRoman string, so I thought
I had to convert the pattern to MacRoman too (that's what my new
regex-wrapper class does). But I get wrong results if I do that. Why? Thx
- m.

matt neuburg, phd = matt at tidbits dot com, http://www.tidbits.com/matt
pantes anthropoi tou eidenai oregontai phusei
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