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RegExp - question about [:print:] and Chr(160)

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HelpFile for RegExp says:

Quote
[:print:] ASCII printing characters, including space (same as Chr(32) ... Chr(126)).

Why this usage is not catching NBS I mean Chr(160) ?

 


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Posted (edited)

Here, ASCII means ASCII, i.e. [0x00..0x7F] and not "Extended ASCII".  What the StrngRegexp doc doesn't say is that in UCP mode [:print:] cover the whole range of printable codepoints of UCS2 charset (= Unicode BMP).

Local $s
For $i = 0x00 To 0x3FF      ; put some low limit
    $s &= ChrW($i)
Next
$s = StringRegExpReplace($s, "(*UCP)[[:^print:]]", "")
Local $a = StringToASCIIArray($s)
For $c In $a
    $cw(Hex($c, 4) & @TAB & ">" & ChrW($c) & "<")
Next

Edit1: Other POSIX classes change when UCP is enabled, something which is not explicitely mentionned in our doc:
[:space:]
[:graph:]
[:punct:]

Edit2: It's noticeable that [:cntrl:] even in UCP mode doesn't cover the range of C1 control characters [0x80..0x9F] ∪ [0xAD].  That may have changed with more recent versions of PCRE1 and all PCRE2 versions.

Edit3: ticket #3725 posted in Trac

Edited by jchd
Expand to other classes

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

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An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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Just playing with POSIX classes a bit, I discovered that:

55045 printable codepoints
55027 graphic codepoints

1 graphic non-printable codepoints
0x0000

18 printable non-graphic codepoints (various spacing codepoints)
0x0020
0x00A0
0x1680
0x180E
0x2000
0x2001
0x2002
0x2003
0x2004
0x2005
0x2006
0x2007
0x2008
0x2009
0x200A
0x202F
0x205F
0x3000

Now back to work!


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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