MEOL EOL, no Same, assuming multiline.
SEOL EOL, no Same, assuming singleline.
BOUND BOUND, no Match "" at any word boundary
-BOUNDUTF8 BOUND, no Match "" at any word boundary
BOUNDL BOUND, no Match "" at any word boundary
-BOUNDLUTF8 BOUND, no Match "" at any word boundary
NBOUND NBOUND, no Match "" at any word non-boundary
-NBOUNDUTF8 NBOUND, no Match "" at any word non-boundary
NBOUNDL NBOUND, no Match "" at any word non-boundary
-NBOUNDLUTF8 NBOUND, no Match "" at any word non-boundary
GPOS GPOS, no Matches where last m//g left off.
# [Special] alternatives
-ANY ANY, no Match any one character (except newline).
-ANYUTF8 ANY, no Match any one Unicode character (except newline).
-SANY ANY, no Match any one character.
-SANYUTF8 ANY, no Match any one Unicode character.
+REG_ANY REG_ANY, no Match any one character (except newline).
+SANY REG_ANY, no Match any one character.
ANYOF ANYOF, sv Match character in (or not in) this class.
-ANYOFUTF8 ANYOF, sv 1 Match character in (or not in) this class.
ALNUM ALNUM, no Match any alphanumeric character
-ALNUMUTF8 ALNUM, no Match any alphanumeric character
ALNUML ALNUM, no Match any alphanumeric char in locale
-ALNUMLUTF8 ALNUM, no Match any alphanumeric char in locale
NALNUM NALNUM, no Match any non-alphanumeric character
-NALNUMUTF8 NALNUM, no Match any non-alphanumeric character
NALNUML NALNUM, no Match any non-alphanumeric char in locale
-NALNUMLUTF8 NALNUM, no Match any non-alphanumeric char in locale
SPACE SPACE, no Match any whitespace character
-SPACEUTF8 SPACE, no Match any whitespace character
SPACEL SPACE, no Match any whitespace char in locale
-SPACELUTF8 SPACE, no Match any whitespace char in locale
NSPACE NSPACE, no Match any non-whitespace character
-NSPACEUTF8 NSPACE, no Match any non-whitespace character
NSPACEL NSPACE, no Match any non-whitespace char in locale
-NSPACELUTF8 NSPACE, no Match any non-whitespace char in locale
DIGIT DIGIT, no Match any numeric character
-DIGITUTF8 DIGIT, no Match any numeric character
+DIGITL DIGIT, no Match any numeric character in locale
NDIGIT NDIGIT, no Match any non-numeric character
-NDIGITUTF8 NDIGIT, no Match any non-numeric character
+NDIGITL NDIGIT, no Match any non-numeric character in locale
CLUMP CLUMP, no Match any combining character sequence
# BRANCH The set of branches constituting a single choice are hooked