diff options
Diffstat (limited to 'doc/gawktexi.in')
| -rw-r--r-- | doc/gawktexi.in | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/doc/gawktexi.in b/doc/gawktexi.in index 66de1068..8ad59282 100644 --- a/doc/gawktexi.in +++ b/doc/gawktexi.in @@ -4231,8 +4231,7 @@ Allow interval expressions (@pxref{Regexp Operators}) in regexps. This is now @command{gawk}'s default behavior. -Nevertheless, this option remains (both for backward compatibility -and for use in combination with @option{--traditional}). +Nevertheless, this option remains for backward compatibility. @item @option{-s} @itemx @option{--no-optimize} @@ -5838,11 +5837,12 @@ When @samp{@{} and @samp{@}} appear in regexp constants in a way that cannot be interpreted as an interval expression (such as @code{/q@{a@}/}), then they stand for themselves. +@cindex BWK @command{awk} @subentry interval expressions in As mentioned, interval expressions were not traditionally available in @command{awk}. In March of 2019, BWK @command{awk} (finally) acquired them. -Nonetheless, because they were not available for -so many decades, @command{gawk} continues to not supply them -when in compatibility mode (@pxref{Options}). +Starting with @value{PVERSION} 5.2, @command{gawk}'s +@option{--traditional} option no longer disables interval +expressions in regular expressions. POSIX says that interval expressions containing repetition counts greater than 255 produce unspecified results. @@ -6362,16 +6362,15 @@ are allowed. @cindex Brian Kernighan's @command{awk} @item @option{--traditional} Match traditional Unix @command{awk} regexps. The GNU operators -are not special, and interval expressions are not available. -Because BWK @command{awk} supports them, +are not special. Because BWK @command{awk} supports them, the POSIX character classes (@samp{[[:alnum:]]}, etc.) are available. +So too, interval expressions are allowed. Characters described by octal and hexadecimal escape sequences are treated literally, even if they represent regexp metacharacters. @item @option{--re-interval} -Allow interval expressions in regexps, if @option{--traditional} -has been provided. -Otherwise, interval expressions are available by default. +This option remains for backwards compatibility but no longer has any +real effect. @end table @node Case-sensitivity |