On Fri, Apr 14, 2023 at 12:01:39PM -0400, rhkra...@gmail.com wrote: > On Thursday, April 13, 2023 10:36:08 PM Greg Wooledge wrote: > > [ If an open bracket introduces a bracket expression as in XBD RE > > Bracket Expression, except that the <exclamation-mark> character > > ( '!' ) shall replace the <circumflex> character ( '^' ) in its > > role in a non-matching list in the regular expression notation, it > > shall introduce a pattern bracket expression. A bracket expression > > starting with an unquoted <circumflex> character produces unspecified > > results. Otherwise, '[' shall match the character itself. > > Wow -- I thought this was an English language list :-( > > But seriously, that seems very hard to interpret / understand.
If it helps, you can ignore most of it. The pieces that we care about are: 1) the <exclamation-mark> character ( '!' ) shall replace the <circumflex> character ( '^' ) 2) A bracket expression starting with an unquoted <circumflex> character produces unspecified results.
