diff options
Diffstat (limited to 'pod/perlretut.pod')
| -rw-r--r-- | pod/perlretut.pod | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/pod/perlretut.pod b/pod/perlretut.pod index d8ac91f508..84d4d8a267 100644 --- a/pod/perlretut.pod +++ b/pod/perlretut.pod @@ -1552,7 +1552,8 @@ the regexp in the I<last successful match> is used instead. So we have =head3 Global matching -The final two modifiers C<//g> and C<//c> concern multiple matches. +The final two modifiers we will disccuss here, +C<//g> and C<//c>, concern multiple matches. The modifier C<//g> stands for global matching and allows the matching operator to match within a string as many times as possible. In scalar context, successive invocations against a string will have @@ -1896,8 +1897,8 @@ to know 1) how to represent Unicode characters in a regexp and 2) that a matching operation will treat the string to be searched as a sequence of characters, not bytes. The answer to 1) is that Unicode characters greater than C<chr(255)> are represented using the C<\x{hex}> notation, because -\x hex (without curly braces) doesn't go further than 255. Starting in Perl -5.14, if you're an octal fan, you can also use C<\o{oct}>. +\x hex (without curly braces) doesn't go further than 255. (Starting in Perl +5.14, if you're an octal fan, you can also use C<\o{oct}>.) /\x{263a}/; # match a Unicode smiley face :) @@ -1953,6 +1954,8 @@ example, to match lower and uppercase characters, $x =~ /^\p{IsLower}/; # doesn't match, lowercase char class $x =~ /^\P{IsLower}/; # matches, char class sans lowercase +(The "Is" is optional.) + Here is the association between some Perl named classes and the traditional Unicode classes: @@ -2002,7 +2005,7 @@ never have to use the compound forms, but sometimes it is necessary, and their use can make your code easier to understand. C<\X> is an abbreviation for a character class that comprises -a Unicode I<extended grapheme cluster>. This represents a "logical character", +a Unicode I<extended grapheme cluster>. This represents a "logical character": what appears to be a single character, but may be represented internally by more than one. As an example, using the Unicode full names, e.g., S<C<A + COMBINING RING>> is a grapheme cluster with base character C<A> and combining character @@ -2184,7 +2187,7 @@ example is This style of commenting has been largely superseded by the raw, freeform commenting that is allowed with the C<//x> modifier. -The modifiers C<//i>, C<//m>, C<//s> and C<//x> (or any +Most modifiers, such as C<//i>, C<//m>, C<//s> and C<//x> (or any combination thereof) can also be embedded in a regexp using C<(?i)>, C<(?m)>, C<(?s)>, and C<(?x)>. For instance, |