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regexec.c: Refactor \b code to not use the FLAGS field
[perl5.git] / regexec.c
index 33fb5da..6a209ad 100644 (file)
--- a/regexec.c
+++ b/regexec.c
@@ -231,15 +231,15 @@ static const char* const non_utf8_target_but_utf8_required
 
 #if 0 
 /* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
-   we don't need this definition. */
+   we don't need this definition.  XXX These are now out-of-sync*/
 #define IS_TEXT(rn)   ( OP(rn)==EXACT   || OP(rn)==REF   || OP(rn)==NREF   )
 #define IS_TEXTF(rn)  ( OP(rn)==EXACTFU || OP(rn)==EXACTFU_SS || OP(rn)==EXACTFA || OP(rn)==EXACTFA_NO_TRIE || OP(rn)==EXACTF || OP(rn)==REFF  || OP(rn)==NREFF )
 #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
 
 #else
 /* ... so we use this as its faster. */
-#define IS_TEXT(rn)   ( OP(rn)==EXACT   )
-#define IS_TEXTFU(rn)  ( OP(rn)==EXACTFU || OP(rn)==EXACTFU_SS || OP(rn) == EXACTFA || OP(rn) == EXACTFA_NO_TRIE)
+#define IS_TEXT(rn)   ( OP(rn)==EXACT || OP(rn)==EXACTL )
+#define IS_TEXTFU(rn)  ( OP(rn)==EXACTFU || OP(rn)==EXACTFLU8 || OP(rn)==EXACTFU_SS || OP(rn) == EXACTFA || OP(rn) == EXACTFA_NO_TRIE)
 #define IS_TEXTF(rn)  ( OP(rn)==EXACTF  )
 #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
 
@@ -485,7 +485,7 @@ S_isFOO_lc(pTHX_ const U8 classnum, const U8 character)
             Perl_croak(aTHX_ "panic: isFOO_lc() has an unexpected character class '%d'", classnum);
     }
 
-    assert(0); /* NOTREACHED */
+    NOT_REACHED; /* NOTREACHED */
     return FALSE;
 }
 
@@ -498,7 +498,7 @@ S_isFOO_utf8_lc(pTHX_ const U8 classnum, const U8* character)
      * '_char_class_number'.
      *
      * This just calls isFOO_lc on the code point for the character if it is in
-     * the range 0-255.  Outside that range, all characters avoid Unicode
+     * the range 0-255.  Outside that range, all characters use Unicode
      * rules, ignoring any locale.  So use the Unicode function if this class
      * requires a swash, and use the Unicode macro otherwise. */
 
@@ -512,6 +512,8 @@ S_isFOO_utf8_lc(pTHX_ const U8 classnum, const U8* character)
                         TWO_BYTE_UTF8_TO_NATIVE(*character, *(character + 1)));
     }
 
+    _CHECK_AND_OUTPUT_WIDE_LOCALE_UTF8_MSG(character, character + UTF8SKIP(character));
+
     if (classnum < _FIRST_NON_SWASH_CC) {
 
         /* Initialize the swash unless done already */
@@ -703,6 +705,7 @@ Perl_re_intuit_start(pTHX_
        goto fail;
     }
 
+    RX_MATCH_UTF8_set(rx,utf8_target);
     reginfo->is_utf8_target = cBOOL(utf8_target);
     reginfo->info_aux = NULL;
     reginfo->strbeg = strbeg;
@@ -772,7 +775,7 @@ Perl_re_intuit_start(pTHX_
              * be too fiddly (e.g. REXEC_IGNOREPOS).
              */
             if (   strpos != strbeg
-                && (prog->intflags & (PREGf_ANCH_BOL|PREGf_ANCH_SBOL)))
+                && (prog->intflags & PREGf_ANCH_SBOL))
             {
                DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
                                 "  Not at start...\n"));
@@ -896,7 +899,7 @@ Perl_re_intuit_start(pTHX_
 
 
         /* If the regex is absolutely anchored to either the start of the
-         * string (BOL,SBOL) or to pos() (ANCH_GPOS), then
+         * string (SBOL) or to pos() (ANCH_GPOS), then
          * check_offset_max represents an upper bound on the string where
          * the substr could start. For the ANCH_GPOS case, we assume that
          * the caller of intuit will have already set strpos to
@@ -1432,23 +1435,39 @@ Perl_re_intuit_start(pTHX_
 
 
 #define DECL_TRIE_TYPE(scan) \
-    const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold, \
-                 trie_utf8_exactfa_fold, trie_latin_utf8_exactfa_fold } \
-                    trie_type = ((scan->flags == EXACT) \
-                              ? (utf8_target ? trie_utf8 : trie_plain) \
-                              : (scan->flags == EXACTFA) \
-                                ? (utf8_target ? trie_utf8_exactfa_fold : trie_latin_utf8_exactfa_fold) \
-                                : (utf8_target ? trie_utf8_fold : trie_latin_utf8_fold))
+    const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold,       \
+                 trie_utf8_exactfa_fold, trie_latin_utf8_exactfa_fold,              \
+                 trie_utf8l, trie_flu8 }                                            \
+                    trie_type = ((scan->flags == EXACT)                             \
+                                 ? (utf8_target ? trie_utf8 : trie_plain)           \
+                                 : (scan->flags == EXACTL)                          \
+                                    ? (utf8_target ? trie_utf8l : trie_plain)       \
+                                    : (scan->flags == EXACTFA)                      \
+                                      ? (utf8_target                                \
+                                         ? trie_utf8_exactfa_fold                   \
+                                         : trie_latin_utf8_exactfa_fold)            \
+                                      : (scan->flags == EXACTFLU8                   \
+                                         ? trie_flu8                                \
+                                         : (utf8_target                             \
+                                           ? trie_utf8_fold                         \
+                                           :   trie_latin_utf8_fold)))
 
 #define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, uvc, charid, foldlen, foldbuf, uniflags) \
 STMT_START {                                                                        \
     STRLEN skiplen;                                                                 \
     U8 flags = FOLD_FLAGS_FULL;                                                     \
     switch (trie_type) {                                                            \
+    case trie_flu8:                                                                 \
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;                                         \
+        if (utf8_target && UTF8_IS_ABOVE_LATIN1(*uc)) {                             \
+            _CHECK_AND_OUTPUT_WIDE_LOCALE_UTF8_MSG(uc, uc + UTF8SKIP(uc));          \
+        }                                                                           \
+        goto do_trie_utf8_fold;                                                     \
     case trie_utf8_exactfa_fold:                                                    \
         flags |= FOLD_FLAGS_NOMIX_ASCII;                                            \
-        /* FALLTHROUGH */                                                          \
+        /* FALLTHROUGH */                                                           \
     case trie_utf8_fold:                                                            \
+      do_trie_utf8_fold:                                                            \
         if ( foldlen>0 ) {                                                          \
             uvc = utf8n_to_uvchr( (const U8*) uscan, UTF8_MAXLEN, &len, uniflags ); \
             foldlen -= len;                                                         \
@@ -1464,7 +1483,7 @@ STMT_START {
         break;                                                                      \
     case trie_latin_utf8_exactfa_fold:                                              \
         flags |= FOLD_FLAGS_NOMIX_ASCII;                                            \
-        /* FALLTHROUGH */                                                          \
+        /* FALLTHROUGH */                                                           \
     case trie_latin_utf8_fold:                                                      \
         if ( foldlen>0 ) {                                                          \
             uvc = utf8n_to_uvchr( (const U8*) uscan, UTF8_MAXLEN, &len, uniflags ); \
@@ -1479,6 +1498,12 @@ STMT_START {
             uscan = foldbuf + skiplen;                                              \
         }                                                                           \
         break;                                                                      \
+    case trie_utf8l:                                                                \
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;                                         \
+        if (utf8_target && UTF8_IS_ABOVE_LATIN1(*uc)) {                             \
+            _CHECK_AND_OUTPUT_WIDE_LOCALE_UTF8_MSG(uc, uc + UTF8SKIP(uc));          \
+        }                                                                           \
+        /* FALLTHROUGH */                                                           \
     case trie_utf8:                                                                 \
         uvc = utf8n_to_uvchr( (const U8*) uc, UTF8_MAXLEN, &len, uniflags );        \
         break;                                                                      \
@@ -1738,6 +1763,9 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
 
     /* We know what class it must start with. */
     switch (OP(c)) {
+    case ANYOFL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
+        /* FALLTHROUGH */
     case ANYOF:
         if (utf8_target) {
             REXEC_FBC_UTF8_CLASS_SCAN(
@@ -1779,6 +1807,7 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
         goto do_exactf_non_utf8;
 
     case EXACTFL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
         if (is_utf8_pat || utf8_target || IN_UTF8_CTYPE_LOCALE) {
             utf8_fold_flags = FOLDEQ_LOCALE;
             goto do_exactf_utf8;
@@ -1793,6 +1822,15 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
         }
         goto do_exactf_utf8;
 
+    case EXACTFLU8:
+            if (! utf8_target) {    /* All code points in this node require
+                                       UTF-8 to express.  */
+                break;
+            }
+            utf8_fold_flags =  FOLDEQ_LOCALE | FOLDEQ_S2_ALREADY_FOLDED
+                                             | FOLDEQ_S2_FOLDS_SANE;
+            goto do_exactf_utf8;
+
     case EXACTFU:
         if (is_utf8_pat || utf8_target) {
             utf8_fold_flags = is_utf8_pat ? FOLDEQ_S2_ALREADY_FOLDED : 0;
@@ -1898,9 +1936,11 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
     }
 
     case BOUNDL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
         FBC_BOUND(isWORDCHAR_LC, isWORDCHAR_LC_uvchr, isWORDCHAR_LC_utf8);
         break;
     case NBOUNDL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
         FBC_NBOUND(isWORDCHAR_LC, isWORDCHAR_LC_uvchr, isWORDCHAR_LC_utf8);
         break;
     case BOUND:
@@ -1935,6 +1975,7 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
         /* FALLTHROUGH */
 
     case POSIXL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
         REXEC_FBC_CSCAN(to_complement ^ cBOOL(isFOO_utf8_lc(FLAGS(c), (U8 *) s)),
                         to_complement ^ cBOOL(isFOO_lc(FLAGS(c), *s)));
         break;
@@ -2046,7 +2087,7 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
 
                 default:
                     Perl_croak(aTHX_ "panic: find_byclass() node %d='%s' has an unexpected character class '%d'", OP(c), PL_reg_name[OP(c)], classnum);
-                    assert(0); /* NOTREACHED */
+                    NOT_REACHED; /* NOTREACHED */
             }
         }
         break;
@@ -2617,6 +2658,7 @@ Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, char *strend,
     }
 
     RX_MATCH_TAINTED_off(rx);
+    RX_MATCH_UTF8_set(rx, utf8_target);
 
     reginfo->prog = rx;         /* Yes, sorry that this is confusing.  */
     reginfo->intuit = 0;
@@ -2637,7 +2679,6 @@ Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, char *strend,
            magic belonging to this SV.
            Not newSVsv, either, as it does not COW.
         */
-        assert(!IS_PADGV(sv));
         reginfo->sv = newSV(0);
         SvSetSV_nosteal(reginfo->sv, sv);
         SAVEFREESV(reginfo->sv);
@@ -2715,7 +2756,7 @@ Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, char *strend,
     }
 
     /* Simplest case:  anchored match need be tried only once. */
-    /*  [unless only anchor is BOL and multiline is set] */
+    /*  [unless only anchor is MBOL - implying multiline is set] */
     if (prog->intflags & (PREGf_ANCH & ~PREGf_ANCH_GPOS)) {
        if (s == startpos && regtry(reginfo, &s))
            goto got_it;
@@ -2969,7 +3010,7 @@ Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, char *strend,
        }
        DEBUG_EXECUTE_r({
            SV * const prop = sv_newmortal();
-            regprop(prog, prop, c, reginfo);
+            regprop(prog, prop, c, reginfo, NULL);
            {
                RE_PV_QUOTED_DECL(quoted,utf8_target,PERL_DEBUG_PAD_ZERO(1),
                    s,strend-s,60);
@@ -3075,7 +3116,8 @@ Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, char *strend,
                  * and replaced it with this one. Yves */
                DEBUG_EXECUTE_r(
                    PerlIO_printf(Perl_debug_log,
-                       "String does not contain required substring, cannot match.\n"
+                       "%sString does not contain required substring, cannot match.%s\n",
+                        PL_colors[4], PL_colors[5]
                    ));
                goto phooey;
            }
@@ -3105,7 +3147,7 @@ Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, char *strend,
     /* Failure. */
     goto phooey;
 
-got_it:
+  got_it:
     /* s/// doesn't like it if $& is earlier than where we asked it to
      * start searching (which can happen on something like /.\G/) */
     if (       (flags & REXEC_FAIL_ON_UNDERFLOW)
@@ -3137,8 +3179,6 @@ got_it:
     if (RXp_PAREN_NAMES(prog)) 
         (void)hv_iterinit(RXp_PAREN_NAMES(prog));
 
-    RX_MATCH_UTF8_set(rx, utf8_target);
-
     /* make sure $`, $&, $', and $digit will work later */
     if ( !(flags & REXEC_NOT_FIRST) )
         S_reg_set_capture_string(aTHX_ rx,
@@ -3147,7 +3187,7 @@ got_it:
 
     return 1;
 
-phooey:
+  phooey:
     DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
                          PL_colors[4], PL_colors[5]));
 
@@ -3648,7 +3688,7 @@ S_setup_EXACTISH_ST_c1_c2(pTHX_ const regnode * const text_node, int *c1p,
     U8 *pat = (U8*)STRING(text_node);
     U8 folded[UTF8_MAX_FOLD_CHAR_EXPAND * UTF8_MAXBYTES_CASE + 1] = { '\0' };
 
-    if (OP(text_node) == EXACT) {
+    if (OP(text_node) == EXACT || OP(text_node) == EXACTL) {
 
         /* In an exact node, only one thing can be matched, that first
          * character.  If both the pat and the target are UTF-8, we can just
@@ -3844,7 +3884,7 @@ S_setup_EXACTISH_ST_c1_c2(pTHX_ const regnode * const text_node, int *c1p,
 
                     default:
                         Perl_croak(aTHX_ "panic: Unexpected op %u", OP(text_node));
-                        assert(0); /* NOTREACHED */
+                        NOT_REACHED; /* NOTREACHED */
                 }
             }
         }
@@ -3991,7 +4031,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
            SV * const prop = sv_newmortal();
            regnode *rnext=regnext(scan);
            DUMP_EXEC_POS( locinput, scan, utf8_target );
-            regprop(rex, prop, scan, reginfo);
+            regprop(rex, prop, scan, reginfo, NULL);
             
            PerlIO_printf(Perl_debug_log,
                    "%3"IVdf":%*s%s(%"IVdf")\n",
@@ -4013,8 +4053,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
         assert(nextchr < 256 && (nextchr >= 0 || nextchr == NEXTCHR_EOS));
 
        switch (state_num) {
-       case BOL:  /*  /^../   */
-       case SBOL: /*  /^../s  */
+       case SBOL: /*  /^../ and /\A../  */
            if (locinput == reginfo->strbeg)
                break;
            sayNO;
@@ -4038,23 +4077,21 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
            rex->offs[0].start = locinput - reginfo->strbeg;
            PUSH_STATE_GOTO(KEEPS_next, next, locinput);
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case KEEPS_next_fail:
            /* rollback the start point change */
            rex->offs[0].start = st->u.keeper.val;
            sayNO_SILENT;
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case MEOL: /* /..$/m  */
            if (!NEXTCHR_IS_EOS && nextchr != '\n')
                sayNO;
            break;
 
-       case EOL: /* /..$/  */
-            /* FALLTHROUGH */
-       case SEOL: /* /..$/s  */
+       case SEOL: /* /..$/  */
            if (!NEXTCHR_IS_EOS && nextchr != '\n')
                sayNO;
            if (reginfo->strend - locinput > 1)
@@ -4097,7 +4134,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
                 );
                 sayNO_SILENT;
                 /* NOTREACHED */
-                assert(0);
+                NOT_REACHED;
             }
             /* FALLTHROUGH */
        case TRIE:  /* (ab|cd)  */
@@ -4155,6 +4192,19 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
                HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
                 U32 state = trie->startstate;
 
+                if (scan->flags == EXACTL || scan->flags == EXACTFLU8) {
+                    _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
+                    if (utf8_target
+                        && UTF8_IS_ABOVE_LATIN1(nextchr)
+                        && scan->flags == EXACTL)
+                    {
+                        /* We only output for EXACTL, as we let the folder
+                         * output this message for EXACTFLU8 to avoid
+                         * duplication */
+                        _CHECK_AND_OUTPUT_WIDE_LOCALE_UTF8_MSG(locinput,
+                                                               reginfo->strend);
+                    }
+                }
                 if (   trie->bitmap
                     && (NEXTCHR_IS_EOS || !TRIE_BITMAP_TEST(trie, nextchr)))
                 {
@@ -4285,7 +4335,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
                goto trie_first_try; /* jump into the fail handler */
            }}
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case TRIE_next_fail: /* we failed - try next alternative */
         {
@@ -4400,7 +4450,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
            if (ST.accepted > 1 || has_cutgroup) {
                PUSH_STATE_GOTO(TRIE_next, scan, (char*)uc);
                 /* NOTREACHED */
-               assert(0);
+               NOT_REACHED;
            }
            /* only one choice left - just continue */
            DEBUG_EXECUTE_r({
@@ -4425,10 +4475,22 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
            locinput = (char*)uc;
            continue; /* execute rest of RE */
             /* NOTREACHED */
-           assert(0);
         }
 #undef  ST
 
+       case EXACTL:             /*  /abc/l       */
+            _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
+
+            /* Complete checking would involve going through every character
+             * matched by the string to see if any is above latin1.  But the
+             * comparision otherwise might very well be a fast assembly
+             * language routine, and I (khw) don't think slowing things down
+             * just to check for this warning is worth it.  So this just checks
+             * the first character */
+            if (utf8_target && UTF8_IS_ABOVE_LATIN1(*locinput)) {
+                _CHECK_AND_OUTPUT_WIDE_LOCALE_UTF8_MSG(locinput, reginfo->strend);
+            }
+            /* FALLTHROUGH */
        case EXACT: {            /*  /abc/        */
            char *s = STRING(scan);
            ln = STR_LEN(scan);
@@ -4515,11 +4577,24 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
            const char * s;
            U32 fold_utf8_flags;
 
+            _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
             folder = foldEQ_locale;
             fold_array = PL_fold_locale;
            fold_utf8_flags = FOLDEQ_LOCALE;
            goto do_exactf;
 
+        case EXACTFLU8:           /*  /abc/il; but all 'abc' are above 255, so
+                                      is effectively /u; hence to match, target
+                                      must be UTF-8. */
+            if (! utf8_target) {
+                sayNO;
+            }
+            fold_utf8_flags =  FOLDEQ_LOCALE | FOLDEQ_S1_ALREADY_FOLDED
+                                             | FOLDEQ_S1_FOLDS_SANE;
+           folder = foldEQ_latin1;
+           fold_array = PL_fold_latin1;
+           goto do_exactf;
+
        case EXACTFU_SS:         /*  /\x{df}/iu   */
        case EXACTFU:            /*  /abc/iu      */
            folder = foldEQ_latin1;
@@ -4582,90 +4657,109 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
            break;
        }
 
-       /* XXX Could improve efficiency by separating these all out using a
-        * macro or in-line function.  At that point regcomp.c would no longer
-        * have to set the FLAGS fields of these */
-       case BOUNDL:  /*  /\b/l  */
+       /* XXX At that point regcomp.c would no longer * have to set the FLAGS fields of these */
        case NBOUNDL: /*  /\B/l  */
+            to_complement = 1;
+            /* FALLTHROUGH */
+
+       case BOUNDL:  /*  /\b/l  */
+            _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
+           if (utf8_target) {
+               if (locinput == reginfo->strbeg)
+                   ln = isWORDCHAR_LC('\n');
+               else {
+                    ln = isWORDCHAR_LC_utf8(reghop3((U8*)locinput, -1,
+                                                        (U8*)(reginfo->strbeg)));
+               }
+                n = (NEXTCHR_IS_EOS)
+                    ? isWORDCHAR_LC('\n')
+                    : isWORDCHAR_LC_utf8((U8*)locinput);
+           }
+           else { /* Here the string isn't utf8 */
+               ln = (locinput == reginfo->strbeg)
+                     ? isWORDCHAR_LC('\n')
+                     : isWORDCHAR_LC(UCHARAT(locinput - 1));
+                n = (NEXTCHR_IS_EOS)
+                    ? isWORDCHAR_LC('\n')
+                    : isWORDCHAR_LC(nextchr);
+           }
+            if (to_complement ^ (ln == n)) {
+                sayNO;
+            }
+           break;
+
+       case NBOUND:  /*  /\B/   */
+            to_complement = 1;
+            /* FALLTHROUGH */
+
        case BOUND:   /*  /\b/   */
-       case BOUNDU:  /*  /\b/u  */
+           if (utf8_target) {
+                goto bound_utf8;
+            }
+            goto bound_ascii_match_only;
+
+       case NBOUNDA: /*  /\B/a  */
+            to_complement = 1;
+            /* FALLTHROUGH */
+
        case BOUNDA:  /*  /\b/a  */
-       case NBOUND:  /*  /\B/   */
+
+      bound_ascii_match_only:
+            /* Here the string isn't utf8, or is utf8 and only ascii characters
+             * are to match \w.  In the latter case looking at the byte just
+             * prior to the current one may be just the final byte of a
+             * multi-byte character.  This is ok.  There are two cases:
+             * 1) it is a single byte character, and then the test is doing
+             *    just what it's supposed to.
+             * 2) it is a multi-byte character, in which case the final byte is
+             *    never mistakable for ASCII, and so the test will say it is
+             *    not a word character, which is the correct answer. */
+            ln = (locinput == reginfo->strbeg)
+                 ? isWORDCHAR_A('\n')
+                 : isWORDCHAR_A(UCHARAT(locinput - 1));
+            n = (NEXTCHR_IS_EOS)
+                ? isWORDCHAR_A('\n')
+                : isWORDCHAR_A(nextchr);
+            if (to_complement ^ (ln == n)) {
+                sayNO;
+            }
+           break;
+
        case NBOUNDU: /*  /\B/u  */
-       case NBOUNDA: /*  /\B/a  */
-           /* was last char in word? */
-           if (utf8_target
-               && FLAGS(scan) != REGEX_ASCII_RESTRICTED_CHARSET
-               && FLAGS(scan) != REGEX_ASCII_MORE_RESTRICTED_CHARSET)
-           {
-               if (locinput == reginfo->strbeg)
-                   ln = '\n';
-               else {
-                   const U8 * const r =
-                            reghop3((U8*)locinput, -1, (U8*)(reginfo->strbeg));
+            to_complement = 1;
+            /* FALLTHROUGH */
 
-                   ln = utf8n_to_uvchr(r, (U8*) reginfo->strend - r,
-                                                                   0, uniflags);
-               }
-               if (FLAGS(scan) != REGEX_LOCALE_CHARSET) {
-                   ln = isWORDCHAR_uni(ln);
-                    if (NEXTCHR_IS_EOS)
-                        n = 0;
-                    else {
-                        LOAD_UTF8_CHARCLASS_ALNUM();
-                        n = swash_fetch(PL_utf8_swash_ptrs[_CC_WORDCHAR], (U8*)locinput,
-                                                                utf8_target);
-                    }
-               }
-               else {
-                   ln = isWORDCHAR_LC_uvchr(ln);
-                   n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR_LC_utf8((U8*)locinput);
-               }
+       case BOUNDU:  /*  /\b/u  */
+           if (utf8_target) {
+
+          bound_utf8:
+                ln = (locinput == reginfo->strbeg)
+                     ? isWORDCHAR_L1('\n')
+                     : isWORDCHAR_utf8(reghop3((U8*)locinput, -1,
+                                                        (U8*)(reginfo->strbeg)));
+                n = (NEXTCHR_IS_EOS)
+                    ? isWORDCHAR_L1('\n')
+                    : isWORDCHAR_utf8((U8*)locinput);
            }
            else {
+                ln = (locinput == reginfo->strbeg)
+                    ? isWORDCHAR_L1('\n')
+                    : isWORDCHAR_L1(UCHARAT(locinput - 1));
+                n = (NEXTCHR_IS_EOS)
+                    ? isWORDCHAR_L1('\n')
+                    : isWORDCHAR_L1(nextchr);
 
-               /* Here the string isn't utf8, or is utf8 and only ascii
-                * characters are to match \w.  In the latter case looking at
-                * the byte just prior to the current one may be just the final
-                * byte of a multi-byte character.  This is ok.  There are two
-                * cases:
-                * 1) it is a single byte character, and then the test is doing
-                *      just what it's supposed to.
-                * 2) it is a multi-byte character, in which case the final
-                *      byte is never mistakable for ASCII, and so the test
-                *      will say it is not a word character, which is the
-                *      correct answer. */
-               ln = (locinput != reginfo->strbeg) ?
-                   UCHARAT(locinput - 1) : '\n';
-               switch (FLAGS(scan)) {
-                   case REGEX_UNICODE_CHARSET:
-                       ln = isWORDCHAR_L1(ln);
-                       n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR_L1(nextchr);
-                       break;
-                   case REGEX_LOCALE_CHARSET:
-                       ln = isWORDCHAR_LC(ln);
-                       n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR_LC(nextchr);
-                       break;
-                   case REGEX_DEPENDS_CHARSET:
-                       ln = isWORDCHAR(ln);
-                       n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR(nextchr);
-                       break;
-                   case REGEX_ASCII_RESTRICTED_CHARSET:
-                   case REGEX_ASCII_MORE_RESTRICTED_CHARSET:
-                       ln = isWORDCHAR_A(ln);
-                       n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR_A(nextchr);
-                       break;
-                   default:
-                       Perl_croak(aTHX_ "panic: Unexpected FLAGS %u in op %u", FLAGS(scan), OP(scan));
-               }
            }
-           /* Note requires that all BOUNDs be lower than all NBOUNDs in
-            * regcomp.sym */
-           if (((!ln) == (!n)) == (OP(scan) < NBOUND))
-                   sayNO;
+
+            if (to_complement ^ (ln == n)) {
+                sayNO;
+            }
            break;
 
-       case ANYOF:  /*  /[abc]/       */
+       case ANYOFL:  /*  /[abc]/l      */
+            _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
+            /* FALLTHROUGH */
+       case ANYOF:  /*   /[abc]/       */
             if (NEXTCHR_IS_EOS)
                 sayNO;
            if (utf8_target) {
@@ -4689,6 +4783,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
             /* FALLTHROUGH */
 
         case POSIXL:    /* \w or [:punct:] etc. under /l */
+            _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
             if (NEXTCHR_IS_EOS)
                 sayNO;
 
@@ -4709,7 +4804,8 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
                 }
             }
             else { /* Here, must be an above Latin-1 code point */
-                goto utf8_posix_not_eos;
+                _CHECK_AND_OUTPUT_WIDE_LOCALE_UTF8_MSG(locinput, reginfo->strend);
+                goto utf8_posix_above_latin1;
             }
 
             /* Here, must be utf8 */
@@ -4768,7 +4864,6 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
             if (NEXTCHR_IS_EOS) {
                 sayNO;
             }
-          utf8_posix_not_eos:
 
             /* Use _generic_isCC() for characters within Latin1.  (Note that
              * UTF8_IS_INVARIANT works even on non-UTF-8 strings, or else
@@ -4792,6 +4887,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
                 locinput += 2;
             }
             else {  /* Handle above Latin-1 code points */
+          utf8_posix_above_latin1:
                 classnum = (_char_class_number) FLAGS(scan);
                 if (classnum < _FIRST_NON_SWASH_CC) {
 
@@ -5065,6 +5161,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
            const U8 *fold_array;
            UV utf8_fold_flags;
 
+            _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
            folder = foldEQ_locale;
            fold_array = PL_fold_locale;
            type = REFFL;
@@ -5109,6 +5206,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
            goto do_nref_ref_common;
 
        case REFFL:  /*  /\1/il  */
+            _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
            folder = foldEQ_locale;
            fold_array = PL_fold_locale;
            utf8_fold_flags = FOLDEQ_LOCALE;
@@ -5192,9 +5290,6 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
        case TAIL: /* placeholder while compiling (A|B|C) */
            break;
 
-       case BACK: /* ??? doesn't appear to be used ??? */
-           break;
-
 #undef  ST
 #define ST st->u.eval
        {
@@ -5233,9 +5328,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
 
             /* and then jump to the code we share with EVAL */
             goto eval_recurse_doit;
-
             /* NOTREACHED */
-            assert(0);
 
         case EVAL:  /*   /(?{A})B/   /(??{A})B/  and /(?(?{A})X|Y)B/   */        
             if (cur_eval && cur_eval->locinput==locinput) {
@@ -5324,7 +5417,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
                        assert(o->op_targ == OP_LEAVE);
                        o = cUNOPo->op_first;
                        assert(o->op_type == OP_ENTER);
-                       o = OP_SIBLING(o);
+                       o = OpSIBLING(o);
                    }
 
                    if (o->op_type != OP_STUB) {
@@ -5450,8 +5543,8 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
                         assert(!(scan->flags & ~RXf_PMf_COMPILETIME));
                        re_sv = rex->engine->op_comp(aTHX_ &ret, 1, NULL,
                                    rex->engine, NULL, NULL,
-                                    /* copy /msix etc to inner pattern */
-                                    scan->flags,
+                                    /* copy /msixn etc to inner pattern */
+                                    ARG2L(scan),
                                     pm_flags);
 
                        if (!(SvFLAGS(ret)
@@ -5517,7 +5610,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
                /* now continue from first node in postoned RE */
                PUSH_YES_STATE_GOTO(EVAL_AB, startpoint, locinput);
                 /* NOTREACHED */
-               assert(0);
+               NOT_REACHED;
        }
 
        case EVAL_AB: /* cleanup after a successful (??{A})B */
@@ -5777,21 +5870,21 @@ NULL
 
            PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next), locinput);
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
        }
 
        case CURLYX_end: /* just finished matching all of A*B */
            cur_curlyx = ST.prev_curlyx;
            sayYES;
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case CURLYX_end_fail: /* just failed to match all of A*B */
            regcpblow(ST.cp);
            cur_curlyx = ST.prev_curlyx;
            sayNO;
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
 
 #undef ST
@@ -5830,7 +5923,7 @@ NULL
 
                PUSH_STATE_GOTO(WHILEM_A_pre, A, locinput);
                 /* NOTREACHED */
-               assert(0);
+               NOT_REACHED;
            }
 
            /* If degenerate A matches "", assume A done. */
@@ -5943,7 +6036,7 @@ NULL
                PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B,
                                     locinput);
                 /* NOTREACHED */
-               assert(0);
+               NOT_REACHED;
            }
 
            /* Prefer A over B for maximal matching. */
@@ -5955,19 +6048,19 @@ NULL
                REGCP_SET(ST.lastcp);
                PUSH_STATE_GOTO(WHILEM_A_max, A, locinput);
                 /* NOTREACHED */
-               assert(0);
+               NOT_REACHED;
            }
            goto do_whilem_B_max;
        }
         /* NOTREACHED */
-       assert(0);
+       NOT_REACHED;
 
        case WHILEM_B_min: /* just matched B in a minimal match */
        case WHILEM_B_max: /* just matched B in a maximal match */
            cur_curlyx = ST.save_curlyx;
            sayYES;
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
            cur_curlyx = ST.save_curlyx;
@@ -5975,7 +6068,7 @@ NULL
            cur_curlyx->u.curlyx.count--;
            CACHEsayNO;
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
            /* FALLTHROUGH */
@@ -5986,7 +6079,7 @@ NULL
            cur_curlyx->u.curlyx.count--;
            CACHEsayNO;
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
            REGCP_UNWIND(ST.lastcp);
@@ -6013,7 +6106,7 @@ NULL
            PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B,
                                 locinput);
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
            cur_curlyx = ST.save_curlyx;
@@ -6048,7 +6141,7 @@ NULL
                /*A*/ NEXTOPER(ST.save_curlyx->u.curlyx.me) + EXTRA_STEP_2ARGS,
                 locinput);
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
 #undef  ST
 #define ST st->u.branch
@@ -6074,14 +6167,14 @@ NULL
                PUSH_STATE_GOTO(BRANCH_next, scan, locinput);
            }
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
         case CUTGROUP:  /*  /(*THEN)/  */
             sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
                 MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
             PUSH_STATE_GOTO(CUTGROUP_next, next, locinput);
             /* NOTREACHED */
-            assert(0);
+            NOT_REACHED;
 
         case CUTGROUP_next_fail:
             do_cutgroup = 1;
@@ -6090,12 +6183,12 @@ NULL
                 sv_commit = st->u.mark.mark_name;
             sayNO;         
             /* NOTREACHED */
-            assert(0);
+            NOT_REACHED;
 
         case BRANCH_next:
             sayYES;
             /* NOTREACHED */
-            assert(0);
+            NOT_REACHED;
 
        case BRANCH_next_fail: /* that branch failed; try the next, if any */
            if (do_cutgroup) {
@@ -6118,7 +6211,6 @@ NULL
             }
            continue; /* execute next BRANCH[J] op */
             /* NOTREACHED */
-           assert(0);
     
        case MINMOD: /* next op will be non-greedy, e.g. A*?  */
            minmod = 1;
@@ -6163,7 +6255,7 @@ NULL
          curlym_do_A: /* execute the A in /A{m,n}B/  */
            PUSH_YES_STATE_GOTO(CURLYM_A, ST.A, locinput); /* match A */
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case CURLYM_A: /* we've just matched an A */
            ST.count++;
@@ -6300,7 +6392,7 @@ NULL
            
            PUSH_STATE_GOTO(CURLYM_B, ST.B, locinput); /* match B */
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case CURLYM_B_fail: /* just failed to match a B */
            REGCP_UNWIND(ST.cp);
@@ -6479,7 +6571,7 @@ NULL
                goto curly_try_B_max;
            }
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case CURLY_B_min_known_fail:
            /* failed to find B in a non-greedy match where c1,c2 valid */
@@ -6555,7 +6647,7 @@ NULL
                PUSH_STATE_GOTO(CURLY_B_min_known, ST.B, locinput);
            }
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case CURLY_B_min_fail:
            /* failed to find B in a non-greedy match where c1,c2 invalid */
@@ -6588,7 +6680,7 @@ NULL
            }
             sayNO;
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        curly_try_B_max:
            /* a successful greedy match: now try to match B */
@@ -6619,7 +6711,7 @@ NULL
                    CURLY_SETPAREN(ST.paren, ST.count);
                    PUSH_STATE_GOTO(CURLY_B_max, ST.B, locinput);
                     /* NOTREACHED */
-                   assert(0);
+                   NOT_REACHED;
                }
            }
            /* FALLTHROUGH */
@@ -6739,7 +6831,7 @@ NULL
            /* execute body of (?...A) */
            PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)), newstart);
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
         }
 
        case IFMATCH_A_fail: /* body of (?...A) failed */
@@ -6780,7 +6872,7 @@ NULL
                sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
            PUSH_STATE_GOTO(COMMIT_next, next, locinput);
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
        case COMMIT_next_fail:
            no_final = 1;    
@@ -6789,7 +6881,7 @@ NULL
        case OPFAIL:   /* (*FAIL)  */
            sayNO;
             /* NOTREACHED */
-           assert(0);
+           NOT_REACHED;
 
 #define ST st->u.mark
         case MARKPOINT: /*  (*MARK:foo)  */
@@ -6800,13 +6892,13 @@ NULL
             ST.mark_loc = locinput;
             PUSH_YES_STATE_GOTO(MARKPOINT_next, next, locinput);
             /* NOTREACHED */
-            assert(0);
+            NOT_REACHED;
 
         case MARKPOINT_next:
             mark_state = ST.prev_mark;
             sayYES;
             /* NOTREACHED */
-            assert(0);
+            NOT_REACHED;
 
         case MARKPOINT_next_fail:
             if (popmark && sv_eq(ST.mark_name,popmark)) 
@@ -6828,7 +6920,7 @@ NULL
                 mark_state->u.mark.mark_name : NULL;
             sayNO;
             /* NOTREACHED */
-            assert(0);
+            NOT_REACHED;
 
         case SKIP:  /*  (*SKIP)  */
             if (scan->flags) {
@@ -6874,7 +6966,7 @@ NULL
             no_final = 1; 
             sayNO;
             /* NOTREACHED */
-            assert(0);
+            NOT_REACHED;
 #undef ST
 
         case LNBREAK: /* \R */
@@ -6909,7 +7001,6 @@ NULL
        scan = next; /* prepare to execute the next op and ... */
        continue;    /* ... jump back to the top, reusing st */
         /* NOTREACHED */
-       assert(0);
 
       push_yes_state:
        /* push a state that backtracks on success */
@@ -6953,7 +7044,6 @@ NULL
            st = newst;
            continue;
             /* NOTREACHED */
-           assert(0);
        }
     }
 
@@ -6964,8 +7054,9 @@ NULL
     Perl_croak(aTHX_ "corrupted regexp pointers");
     /* NOTREACHED */
     sayNO;
+    NOT_REACHED;
 
-yes:
+  yes:
     if (yes_state) {
        /* we have successfully completed a subexpression, but we must now
         * pop to the state marked by yes_state and continue from there */
@@ -7026,7 +7117,7 @@ yes:
     result = 1;
     goto final_exit;
 
-no:
+  no:
     DEBUG_EXECUTE_r(
        PerlIO_printf(Perl_debug_log,
             "%*s  %sfailed...%s\n",
@@ -7034,7 +7125,7 @@ no:
             PL_colors[4], PL_colors[5])
        );
 
-no_silent:
+  no_silent:
     if (no_final) {
         if (yes_state) {
             goto yes;
@@ -7185,6 +7276,12 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
             scan = loceol;
         }
        break;
+    case EXACTL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
+        if (utf8_target && UTF8_IS_ABOVE_LATIN1(*scan)) {
+            _CHECK_AND_OUTPUT_WIDE_LOCALE_UTF8_MSG(scan, loceol);
+        }
+        /* FALLTHROUGH */
     case EXACT:
         assert(STR_LEN(p) == reginfo->is_utf8_pat ? UTF8SKIP(STRING(p)) : 1);
 
@@ -7258,6 +7355,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
        goto do_exactf;
 
     case EXACTFL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
        utf8_flags = FOLDEQ_LOCALE;
        goto do_exactf;
 
@@ -7266,6 +7364,14 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
         utf8_flags = 0;
         goto do_exactf;
 
+    case EXACTFLU8:
+        if (! utf8_target) {
+            break;
+        }
+        utf8_flags =  FOLDEQ_LOCALE | FOLDEQ_S2_ALREADY_FOLDED
+                                    | FOLDEQ_S2_FOLDS_SANE;
+        goto do_exactf;
+
     case EXACTFU_SS:
     case EXACTFU:
        utf8_flags = reginfo->is_utf8_pat ? FOLDEQ_S2_ALREADY_FOLDED : 0;
@@ -7329,6 +7435,9 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
        }
        break;
     }
+    case ANYOFL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
+        /* FALLTHROUGH */
     case ANYOF:
        if (utf8_target) {
            while (hardcount < max
@@ -7351,6 +7460,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
         /* FALLTHROUGH */
 
     case POSIXL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
        if (! utf8_target) {
            while (scan < loceol && to_complement ^ cBOOL(isFOO_lc(FLAGS(p),
                                                                    *scan)))
@@ -7570,16 +7680,18 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
        }
        break;
 
+    case BOUNDL:
+    case NBOUNDL:
+        _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
+        /* FALLTHROUGH */
     case BOUND:
     case BOUNDA:
-    case BOUNDL:
     case BOUNDU:
     case EOS:
     case GPOS:
     case KEEPS:
     case NBOUND:
     case NBOUNDA:
-    case NBOUNDL:
     case NBOUNDU:
     case OPFAIL:
     case SBOL:
@@ -7590,7 +7702,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
     default:
         Perl_croak(aTHX_ "panic: regrepeat() called with unrecognized node type %d='%s'", OP(p), PL_reg_name[OP(p)]);
         /* NOTREACHED */
-        assert(0);
+        NOT_REACHED;
 
     }
 
@@ -7604,7 +7716,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
        GET_RE_DEBUG_FLAGS_DECL;
        DEBUG_EXECUTE_r({
            SV * const prop = sv_newmortal();
-            regprop(prog, prop, p, reginfo);
+            regprop(prog, prop, p, reginfo, NULL);
            PerlIO_printf(Perl_debug_log,
                        "%*s  %s can match %"IVdf" times out of %"IVdf"...\n",
                        REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
@@ -7630,127 +7742,15 @@ Perl_regclass_swash(pTHX_ const regexp *prog, const regnode* node, bool doinit,
         *altsvp = NULL;
     }
 
-    return newSVsv(_get_regclass_nonbitmap_data(prog, node, doinit, listsvp, NULL));
+    return newSVsv(_get_regclass_nonbitmap_data(prog, node, doinit, listsvp, NULL, NULL));
 }
 
-SV *
-Perl__get_regclass_nonbitmap_data(pTHX_ const regexp *prog,
-                                        const regnode* node,
-                                        bool doinit,
-                                        SV** listsvp,
-                                        SV** only_utf8_locale_ptr)
-{
-    /* For internal core use only.
-     * Returns the swash for the input 'node' in the regex 'prog'.
-     * If <doinit> is 'true', will attempt to create the swash if not already
-     *   done.
-     * If <listsvp> is non-null, will return the printable contents of the
-     *    swash.  This can be used to get debugging information even before the
-     *    swash exists, by calling this function with 'doinit' set to false, in
-     *    which case the components that will be used to eventually create the
-     *    swash are returned  (in a printable form).
-     * Tied intimately to how regcomp.c sets up the data structure */
-
-    SV *sw  = NULL;
-    SV *si  = NULL;         /* Input swash initialization string */
-    SV*  invlist = NULL;
-
-    RXi_GET_DECL(prog,progi);
-    const struct reg_data * const data = prog ? progi->data : NULL;
-
-    PERL_ARGS_ASSERT__GET_REGCLASS_NONBITMAP_DATA;
-
-    assert(ANYOF_FLAGS(node)
-                        & (ANYOF_UTF8|ANYOF_NONBITMAP_NON_UTF8|ANYOF_LOC_FOLD));
-
-    if (data && data->count) {
-       const U32 n = ARG(node);
-
-       if (data->what[n] == 's') {
-           SV * const rv = MUTABLE_SV(data->data[n]);
-           AV * const av = MUTABLE_AV(SvRV(rv));
-           SV **const ary = AvARRAY(av);
-           U8 swash_init_flags = _CORE_SWASH_INIT_ACCEPT_INVLIST;
-       
-           si = *ary;  /* ary[0] = the string to initialize the swash with */
-
-           /* Elements 3 and 4 are either both present or both absent. [3] is
-            * any inversion list generated at compile time; [4] indicates if
-            * that inversion list has any user-defined properties in it. */
-            if (av_tindex(av) >= 2) {
-                if (only_utf8_locale_ptr
-                    && ary[2]
-                    && ary[2] != &PL_sv_undef)
-                {
-                    *only_utf8_locale_ptr = ary[2];
-                }
-                else {
-                    assert(only_utf8_locale_ptr);
-                    *only_utf8_locale_ptr = NULL;
-                }
-
-                if (av_tindex(av) >= 3) {
-                    invlist = ary[3];
-                    if (SvUV(ary[4])) {
-                        swash_init_flags |= _CORE_SWASH_INIT_USER_DEFINED_PROPERTY;
-                    }
-                }
-                else {
-                    invlist = NULL;
-                }
-           }
-
-           /* Element [1] is reserved for the set-up swash.  If already there,
-            * return it; if not, create it and store it there */
-           if (ary[1] && SvROK(ary[1])) {
-               sw = ary[1];
-           }
-           else if (doinit && ((si && si != &PL_sv_undef)
-                                 || (invlist && invlist != &PL_sv_undef))) {
-               assert(si);
-               sw = _core_swash_init("utf8", /* the utf8 package */
-                                     "", /* nameless */
-                                     si,
-                                     1, /* binary */
-                                     0, /* not from tr/// */
-                                     invlist,
-                                     &swash_init_flags);
-               (void)av_store(av, 1, sw);
-           }
-       }
-    }
-       
-    /* If requested, return a printable version of what this swash matches */
-    if (listsvp) {
-       SV* matches_string = newSVpvs("");
-
-        /* The swash should be used, if possible, to get the data, as it
-         * contains the resolved data.  But this function can be called at
-         * compile-time, before everything gets resolved, in which case we
-         * return the currently best available information, which is the string
-         * that will eventually be used to do that resolving, 'si' */
-       if ((! sw || (invlist = _get_swash_invlist(sw)) == NULL)
-            && (si && si != &PL_sv_undef))
-        {
-           sv_catsv(matches_string, si);
-       }
-
-       /* Add the inversion list to whatever we have.  This may have come from
-        * the swash, or from an input parameter */
-       if (invlist) {
-           sv_catsv(matches_string, _invlist_contents(invlist));
-       }
-       *listsvp = matches_string;
-    }
-
-    return sw;
-}
 #endif /* !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION) */
 
 /*
  - reginclass - determine if a character falls into a character class
  
-  n is the ANYOF regnode
+  n is the ANYOF-type regnode
   p is the target string
   p_end points to one byte beyond the end of the target string
   utf8_target tells whether p is in UTF-8.
@@ -7784,25 +7784,31 @@ S_reginclass(pTHX_ regexp * const prog, const regnode * const n, const U8* const
                 * UTF8_ALLOW_FFFF */
        if (c_len == (STRLEN)-1)
            Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
+        if (c > 255 && OP(n) == ANYOFL && ! is_ANYOF_SYNTHETIC(n)) {
+            _CHECK_AND_OUTPUT_WIDE_LOCALE_CP_MSG(c);
+        }
     }
 
     /* If this character is potentially in the bitmap, check it */
-    if (c < 256) {
+    if (c < NUM_ANYOF_CODE_POINTS) {
        if (ANYOF_BITMAP_TEST(n, c))
            match = TRUE;
-       else if (flags & ANYOF_NON_UTF8_NON_ASCII_ALL
-               && ! utf8_target
-               && ! isASCII(c))
+       else if ((flags & ANYOF_MATCHES_ALL_NON_UTF8_NON_ASCII)
+                 && ! utf8_target
+                 && ! isASCII(c))
        {
            match = TRUE;
        }
        else if (flags & ANYOF_LOCALE_FLAGS) {
-           if (flags & ANYOF_LOC_FOLD) {
-                if (ANYOF_BITMAP_TEST(n, PL_fold_locale[c])) {
-                    match = TRUE;
-                }
+           if ((flags & ANYOF_LOC_FOLD)
+                && c < 256
+               && ANYOF_BITMAP_TEST(n, PL_fold_locale[c]))
+            {
+                match = TRUE;
             }
-           if (! match && ANYOF_POSIXL_TEST_ANY_SET(n)) {
+            else if (ANYOF_POSIXL_TEST_ANY_SET(n)
+                     && c < 256
+            ) {
 
                 /* The data structure is arranged so bits 0, 2, 4, ... are set
                  * if the class includes the Posix character class given by
@@ -7855,18 +7861,20 @@ S_reginclass(pTHX_ regexp * const prog, const regnode * const n, const U8* const
     /* If the bitmap didn't (or couldn't) match, and something outside the
      * bitmap could match, try that. */
     if (!match) {
-       if (c >= 256 && (flags & ANYOF_ABOVE_LATIN1_ALL)) {
-           match = TRUE;       /* Everything above 255 matches */
+       if (c >= NUM_ANYOF_CODE_POINTS
+            && (flags & ANYOF_MATCHES_ALL_ABOVE_BITMAP))
+        {
+           match = TRUE;       /* Everything above the bitmap matches */
        }
-       else if ((flags & ANYOF_NONBITMAP_NON_UTF8)
-                 || (utf8_target && (flags & ANYOF_UTF8))
+       else if ((flags & ANYOF_HAS_NONBITMAP_NON_UTF8_MATCHES)
+                 || (utf8_target && (flags & ANYOF_HAS_UTF8_NONBITMAP_MATCHES))
                   || ((flags & ANYOF_LOC_FOLD)
                        && IN_UTF8_CTYPE_LOCALE
-                       && ARG(n) != ANYOF_NONBITMAP_EMPTY))
+                       && ARG(n) != ANYOF_ONLY_HAS_BITMAP))
         {
             SV* only_utf8_locale = NULL;
            SV * const sw = _get_regclass_nonbitmap_data(prog, n, TRUE, 0,
-                                                            &only_utf8_locale);
+                                                       &only_utf8_locale, NULL);
            if (sw) {
                 U8 utf8_buffer[2];
                U8 * utf8_p;