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| author | Arnold D. Robbins <arnold@skeeve.com> | 2014-07-04 13:07:13 -0400 |
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| committer | Arnold D. Robbins <arnold@skeeve.com> | 2014-07-04 13:07:13 -0400 |
| commit | f6e8ca91a0046536ed5ffef60bb818d674fadf54 (patch) | |
| tree | ca325e199a67a891dc9a65b5ca25ee36dad6f44d /doc/gawk.texi | |
| parent | aa06b223e89872515f5abe08566c32cae2af3024 (diff) | |
| download | egawk-f6e8ca91a0046536ed5ffef60bb818d674fadf54.tar.gz egawk-f6e8ca91a0046536ed5ffef60bb818d674fadf54.tar.bz2 egawk-f6e8ca91a0046536ed5ffef60bb818d674fadf54.zip | |
Document how to match ASCII characters.
Diffstat (limited to 'doc/gawk.texi')
| -rw-r--r-- | doc/gawk.texi | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/doc/gawk.texi b/doc/gawk.texi index 08fca873..c6520ba3 100644 --- a/doc/gawk.texi +++ b/doc/gawk.texi @@ -5457,6 +5457,17 @@ With the POSIX character classes, you can write @code{/[[:alnum:]]/} to match the alphabetic and numeric characters in your character set. +@c Thanks to +@c Date: Tue, 01 Jul 2014 07:39:51 +0200 +@c From: Hermann Peifer <peifer@gmx.eu> +Some utilities that match regular expressions provide a non-standard +@code{[:ascii:]} character class; @command{awk} does not. However, you +can simulate such a construct using @code{[\x00-\x7F]}. This matches +all values numerically between zero and 127, which is the defined +range of the ASCII character set. Use a complemented character list +(@code{[^\x00-\x7F]}) to match any single-byte characters that are not +in the ASCII range. + @cindex bracket expressions, collating elements @cindex bracket expressions, non-ASCII @cindex collating elements |