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Added URL to HOWTO page, with reference to Regex HOWTO.

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Corrected error: {,5} is not equivalent to {0,5}.
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Andrew M. Kuchling 1998-10-28 15:44:14 +00:00
parent 1d5f988457
commit c1cea208bc
1 changed files with 6 additions and 6 deletions
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12
Doc/lib/libre.tex
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@ -50,8 +50,9 @@ details of the theory and implementation of regular expressions,
consult the Friedl book referenced below, or almost any textbook about consult the Friedl book referenced below, or almost any textbook about
compiler construction. compiler construction.
A brief explanation of the format of regular expressions follows. A brief explanation of the format of regular expressions follows. For
%For further information and a gentler presentation, consult XXX somewhere. further information and a gentler presentation, consult the Regular
Expression HOWTO, accessible from \url{http://www.python.org/doc/howto/}.
Regular expressions can contain both special and ordinary characters. Regular expressions can contain both special and ordinary characters.
Most ordinary characters, like \character{A}, \character{a}, or \character{0}, Most ordinary characters, like \character{A}, \character{a}, or \character{0},
@ -109,10 +110,9 @@ expression will match only \code{'<H1>'}.
\item[\code{\{\var{m},\var{n}\}}] Causes the resulting RE to match from \item[\code{\{\var{m},\var{n}\}}] Causes the resulting RE to match from
\var{m} to \var{n} repetitions of the preceding RE, attempting to \var{m} to \var{n} repetitions of the preceding RE, attempting to
match as many repetitions as possible. For example, \regexp{a\{3,5\}} match as many repetitions as possible. For example, \regexp{a\{3,5\}}
will match from 3 to 5 \character{a} characters. Omitting \var{m} is the same will match from 3 to 5 \character{a} characters. Omitting \var{n}
as specifying 0 for the lower bound; omitting \var{n} specifies an specifies an infinite upper bound; you can't omit \var{m}.
infinite upper bound.
\item[\code{\{\var{m},\var{n}\}?}] Causes the resulting RE to \item[\code{\{\var{m},\var{n}\}?}] Causes the resulting RE to
match from \var{m} to \var{n} repetitions of the preceding RE, match from \var{m} to \var{n} repetitions of the preceding RE,