From f68519ee3f12e5ba41a022ef88ce3d6c3901807f Mon Sep 17 00:00:00 2001
From: Zefram <zefram@fysh.org>
Date: Wed, 6 Dec 2017 00:09:42 +0000
Subject: [PATCH] add "whereis"

"whereis" is like "whereso" except that it performs an implicit
smartmatch.
---
 MANIFEST               |   1 +
 gv.c                   |   3 +-
 keywords.c             |  32 +++-
 keywords.h             |  15 +-
 lib/B/Deparse-core.t   |   1 +
 lib/B/Deparse.pm       |  21 ++-
 lib/B/Deparse.t        |  20 ++-
 perly.act              | 428 +++++++++++++++++++++++++------------------------
 perly.h                |   2 +-
 perly.tab              |  50 +++---
 perly.y                |  16 +-
 pod/perldiag.pod       |  24 ++-
 pod/perlexperiment.pod |   3 +-
 pod/perlfunc.pod       |   9 +-
 pod/perlsyn.pod        |  57 ++++---
 regen/keywords.pl      |   2 +
 t/op/coreamp.t         |   3 +-
 t/op/coresubs.t        |   2 +-
 t/op/cproto.t          |   3 +-
 t/op/whereis.t         |  78 +++++++++
 toke.c                 |   6 +-
 21 files changed, 481 insertions(+), 295 deletions(-)
 create mode 100644 t/op/whereis.t

diff --git a/MANIFEST b/MANIFEST
index 03a002f..e0f01b9 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -5806,6 +5806,7 @@ t/op/ver.t			See if v-strings and the %v format flag work
 t/op/waitpid.t			See if waitpid works
 t/op/wantarray.t		See if wantarray works
 t/op/warn.t			See if warn works
+t/op/whereis.t			See if whereis works
 t/op/whereso.t			See if whereso works
 t/op/while.t			See if while loops work
 t/op/write.t			See if write works (formats work)
diff --git a/gv.c b/gv.c
index 015903c..dd930b5 100644
--- a/gv.c
+++ b/gv.c
@@ -535,7 +535,8 @@ S_maybe_add_coresub(pTHX_ HV * const stash, GV *gv,
     case KEY_s    : case KEY_say  : case KEY_sort   :
     case KEY_state: case KEY_sub  :
     case KEY_tr   : case KEY_UNITCHECK: case KEY_unless:
-    case KEY_until: case KEY_use  : case KEY_whereso  : case KEY_while :
+    case KEY_until: case KEY_use  :
+    case KEY_whereis: case KEY_whereso: case KEY_while:
     case KEY_x    : case KEY_xor  : case KEY_y        :
 	return NULL;
     case KEY_chdir:
diff --git a/keywords.c b/keywords.c
index 217efa3b..23e6145 100644
--- a/keywords.c
+++ b/keywords.c
@@ -1876,7 +1876,7 @@ Perl_keyword (pTHX_ const char *name, I32 len, bool all_keywords)
           goto unknown;
       }
 
-    case 7: /* 30 tokens of length 7 */
+    case 7: /* 31 tokens of length 7 */
       switch (name[0])
       {
         case 'D':
@@ -2299,11 +2299,29 @@ Perl_keyword (pTHX_ const char *name, I32 len, bool all_keywords)
             case 'h':
               if (name[2] == 'e' &&
                   name[3] == 'r' &&
-                  name[4] == 'e' &&
-                  name[5] == 's' &&
-                  name[6] == 'o')
-              {                                   /* whereso          */
-                return (all_keywords || FEATURE_SWITCH_IS_ENABLED ? KEY_whereso : 0);
+                  name[4] == 'e')
+              {
+                switch (name[5])
+                {
+                  case 'i':
+                    if (name[6] == 's')
+                    {                             /* whereis          */
+                      return (all_keywords || FEATURE_SWITCH_IS_ENABLED ? KEY_whereis : 0);
+                    }
+
+                    goto unknown;
+
+                  case 's':
+                    if (name[6] == 'o')
+                    {                             /* whereso          */
+                      return (all_keywords || FEATURE_SWITCH_IS_ENABLED ? KEY_whereso : 0);
+                    }
+
+                    goto unknown;
+
+                  default:
+                    goto unknown;
+                }
               }
 
               goto unknown;
@@ -3408,5 +3426,5 @@ unknown:
 }
 
 /* Generated from:
- * fa7d552d13fad7c3ad101e3f8d5301a9780147c26623ecb3e75f0ec7f0d24cc3 regen/keywords.pl
+ * b2741ab99701d1c72b58afb96a9f210532b6f6ce81aacdf5188a4871c16ee239 regen/keywords.pl
  * ex: set ro: */
diff --git a/keywords.h b/keywords.h
index d630d02..d65879a 100644
--- a/keywords.h
+++ b/keywords.h
@@ -260,13 +260,14 @@
 #define KEY_waitpid		244
 #define KEY_wantarray		245
 #define KEY_warn		246
-#define KEY_whereso		247
-#define KEY_while		248
-#define KEY_write		249
-#define KEY_x			250
-#define KEY_xor			251
-#define KEY_y			252
+#define KEY_whereis		247
+#define KEY_whereso		248
+#define KEY_while		249
+#define KEY_write		250
+#define KEY_x			251
+#define KEY_xor			252
+#define KEY_y			253
 
 /* Generated from:
- * fa7d552d13fad7c3ad101e3f8d5301a9780147c26623ecb3e75f0ec7f0d24cc3 regen/keywords.pl
+ * b2741ab99701d1c72b58afb96a9f210532b6f6ce81aacdf5188a4871c16ee239 regen/keywords.pl
  * ex: set ro: */
diff --git a/lib/B/Deparse-core.t b/lib/B/Deparse-core.t
index e1984c8..d9e1f5d 100644
--- a/lib/B/Deparse-core.t
+++ b/lib/B/Deparse-core.t
@@ -378,6 +378,7 @@ my %not_tested = map { $_ => 1} qw(
     unless
     until
     use
+    whereis
     whereso
     while
     y
diff --git a/lib/B/Deparse.pm b/lib/B/Deparse.pm
index 387bb1e..aa86156 100644
--- a/lib/B/Deparse.pm
+++ b/lib/B/Deparse.pm
@@ -2246,6 +2246,7 @@ my %feature_keywords = (
     state   => 'state',
     say     => 'say',
     given   => 'switch',
+    whereis => 'switch',
     whereso => 'switch',
     evalbytes=>'evalbytes',
     __SUB__ => '__SUB__',
@@ -2539,14 +2540,28 @@ sub pp_lock { unop(@_, "lock") }
 
 sub pp_continue { unop(@_, "continue"); }
 
+sub _op_is_defsv {
+    my($self, $op) = @_;
+    $op->name eq "null" && !null($op->first) && null($op->first->sibling)
+	and $op = $op->first;
+    $op->name eq "gvsv" && $self->gv_name($self->gv_or_padgv($op)) eq "_";
+}
+
 sub pp_leavewhereso {
     my($self, $op, $cx) = @_;
-    my $whereso = $self->keyword("whereso");
     my $enterop = $op->first;
     my $cond = $enterop->first;
+    my $block = $cond->sibling;
+    my $keyword = "whereso";
+    if ($cond->name eq "smartmatch" && $self->{expand} < 2 &&
+		$self->_op_is_defsv($cond->first)) {
+	$cond = $cond->last;
+	$keyword = "whereis";
+    }
     my $cond_str = $self->deparse($cond, 1);
-    my $block = $self->deparse($cond->sibling, 0);
-    return "$whereso ($cond_str) {\n\t$block\n\b}\cK";
+    $keyword = $self->keyword($keyword);
+    $block = $self->deparse($block, 0);
+    return "$keyword ($cond_str) {\n\t$block\n\b}\cK";
 }
 
 sub pp_exists {
diff --git a/lib/B/Deparse.t b/lib/B/Deparse.t
index b8d98ca..e90cbed 100644
--- a/lib/B/Deparse.t
+++ b/lib/B/Deparse.t
@@ -1028,7 +1028,8 @@ my $d = \[];
 # implicit smartmatch in given/whereso
 given ('foo') {
     whereso ('bar') { continue; }
-    whereso ($_ ~~ 'quux') { continue; }
+    whereso ($_ == 3) { continue; }
+    whereis ('quux') { continue; }
     0;
 }
 ####
@@ -1514,6 +1515,9 @@ CORE::given ($x) {
     CORE::whereso (3) {
         continue;
     }
+    CORE::whereis (5) {
+        continue;
+    }
     next;
 }
 CORE::evalbytes '';
@@ -1530,6 +1534,9 @@ CORE::given ($x) {
     CORE::whereso (3) {
         continue;
     }
+    CORE::whereis (5) {
+        continue;
+    }
     next;
 }
 CORE::evalbytes '';
@@ -1541,6 +1548,9 @@ CORE::given ($x) {
     CORE::whereso (3) {
         continue;
     }
+    CORE::whereis (5) {
+        continue;
+    }
     next;
 }
 CORE::evalbytes '';
@@ -1557,6 +1567,9 @@ CORE::given ($x) {
     CORE::whereso (3) {
         continue;
     }
+    CORE::whereis (5) {
+        continue;
+    }
     next;
 }
 CORE::evalbytes '';
@@ -1570,6 +1583,9 @@ CORE::given ($x) {
     CORE::whereso (3) {
         continue;
     }
+    CORE::whereis (5) {
+        continue;
+    }
     next;
 }
 CORE::evalbytes '';
@@ -1598,6 +1614,7 @@ my sub tr;
 my sub unless;
 my sub until;
 my sub use;
+my sub whereis;
 my sub whereso;
 my sub while;
 CORE::if ($1) { die; }
@@ -1621,6 +1638,7 @@ CORE::unless ($1) { die; }
 CORE::until ($1) { die; }
 die CORE::until $1;
 CORE::use strict;
+CORE::whereis (5) { die; }
 CORE::whereso ($1 ~~ $2) { die; }
 CORE::while ($1) { die; }
 die CORE::while $1;
diff --git a/perly.act b/perly.act
index 5587da0..42c9c02 100644
--- a/perly.act
+++ b/perly.act
@@ -392,12 +392,18 @@ case 2:
 
   case 39:
 #line 382 "perly.y" /* yacc.c:1646  */
-    { (yyval.opval) = block_end((ps[-3].val.ival), newWHERESOOP((ps[-2].val.opval), op_scope((ps[0].val.opval)))); }
+    {
+			  OP *cond = (ps[-2].val.opval);
+			  if ((ps[-5].val.ival))
+			    cond = newBINOP(OP_SMARTMATCH, 0, newDEFSVOP(),
+					    scalar(cond));
+			  (yyval.opval) = block_end((ps[-3].val.ival), newWHERESOOP(cond, op_scope((ps[0].val.opval))));
+			}
 
     break;
 
   case 40:
-#line 384 "perly.y" /* yacc.c:1646  */
+#line 390 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = block_end((ps[-5].val.ival),
 				  newWHILEOP(0, 1, NULL,
@@ -408,7 +414,7 @@ case 2:
     break;
 
   case 41:
-#line 391 "perly.y" /* yacc.c:1646  */
+#line 397 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = block_end((ps[-5].val.ival),
 				  newWHILEOP(0, 1, NULL,
@@ -419,19 +425,19 @@ case 2:
     break;
 
   case 42:
-#line 398 "perly.y" /* yacc.c:1646  */
+#line 404 "perly.y" /* yacc.c:1646  */
     { parser->expect = XTERM; }
 
     break;
 
   case 43:
-#line 400 "perly.y" /* yacc.c:1646  */
+#line 406 "perly.y" /* yacc.c:1646  */
     { parser->expect = XTERM; }
 
     break;
 
   case 44:
-#line 403 "perly.y" /* yacc.c:1646  */
+#line 409 "perly.y" /* yacc.c:1646  */
     {
 			  OP *initop = (ps[-9].val.opval);
 			  OP *forop = newWHILEOP(0, 1, NULL,
@@ -450,7 +456,7 @@ case 2:
     break;
 
   case 45:
-#line 418 "perly.y" /* yacc.c:1646  */
+#line 424 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = block_end((ps[-6].val.ival), newFOROP(0, (ps[-5].val.opval), (ps[-3].val.opval), (ps[-1].val.opval), (ps[0].val.opval)));
 			  parser->copline = (line_t)(ps[-8].val.ival);
@@ -459,7 +465,7 @@ case 2:
     break;
 
   case 46:
-#line 423 "perly.y" /* yacc.c:1646  */
+#line 429 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = block_end((ps[-4].val.ival), newFOROP(0,
 				      op_lvalue((ps[-6].val.opval), OP_ENTERLOOP), (ps[-3].val.opval), (ps[-1].val.opval), (ps[0].val.opval)));
@@ -469,13 +475,13 @@ case 2:
     break;
 
   case 47:
-#line 429 "perly.y" /* yacc.c:1646  */
+#line 435 "perly.y" /* yacc.c:1646  */
     { parser->in_my = 0; (yyval.opval) = my((ps[0].val.opval)); }
 
     break;
 
   case 48:
-#line 431 "perly.y" /* yacc.c:1646  */
+#line 437 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = block_end(
 				(ps[-7].val.ival),
@@ -492,7 +498,7 @@ case 2:
     break;
 
   case 49:
-#line 444 "perly.y" /* yacc.c:1646  */
+#line 450 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = block_end((ps[-4].val.ival), newFOROP(
 				0, op_lvalue(newUNOP(OP_REFGEN, 0,
@@ -504,7 +510,7 @@ case 2:
     break;
 
   case 50:
-#line 452 "perly.y" /* yacc.c:1646  */
+#line 458 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = block_end((ps[-4].val.ival),
 				  newFOROP(0, NULL, (ps[-3].val.opval), (ps[-1].val.opval), (ps[0].val.opval)));
@@ -514,7 +520,7 @@ case 2:
     break;
 
   case 51:
-#line 458 "perly.y" /* yacc.c:1646  */
+#line 464 "perly.y" /* yacc.c:1646  */
     {
 			  /* a block is a loop that happens once */
 			  (yyval.opval) = newWHILEOP(0, 1, NULL,
@@ -524,7 +530,7 @@ case 2:
     break;
 
   case 52:
-#line 464 "perly.y" /* yacc.c:1646  */
+#line 470 "perly.y" /* yacc.c:1646  */
     {
 			  package((ps[-2].val.opval));
 			  if ((ps[-3].val.opval)) {
@@ -535,7 +541,7 @@ case 2:
     break;
 
   case 53:
-#line 471 "perly.y" /* yacc.c:1646  */
+#line 477 "perly.y" /* yacc.c:1646  */
     {
 			  /* a block is a loop that happens once */
 			  (yyval.opval) = newWHILEOP(0, 1, NULL,
@@ -547,7 +553,7 @@ case 2:
     break;
 
   case 54:
-#line 479 "perly.y" /* yacc.c:1646  */
+#line 485 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = (ps[-1].val.opval);
 			}
@@ -555,7 +561,7 @@ case 2:
     break;
 
   case 55:
-#line 483 "perly.y" /* yacc.c:1646  */
+#line 489 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0),
 				newSVOP(OP_CONST, 0, newSVpvs("Unimplemented")));
@@ -564,7 +570,7 @@ case 2:
     break;
 
   case 56:
-#line 488 "perly.y" /* yacc.c:1646  */
+#line 494 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = NULL;
 			  parser->copline = NOLINE;
@@ -573,7 +579,7 @@ case 2:
     break;
 
   case 57:
-#line 496 "perly.y" /* yacc.c:1646  */
+#line 502 "perly.y" /* yacc.c:1646  */
     { OP *list;
 			  if ((ps[0].val.opval)) {
 			      OP *term = (ps[0].val.opval);
@@ -592,74 +598,80 @@ case 2:
     break;
 
   case 58:
-#line 513 "perly.y" /* yacc.c:1646  */
+#line 519 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 59:
-#line 515 "perly.y" /* yacc.c:1646  */
+#line 521 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_unscope((ps[-1].val.opval)); }
 
     break;
 
   case 60:
-#line 520 "perly.y" /* yacc.c:1646  */
+#line 526 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 61:
-#line 522 "perly.y" /* yacc.c:1646  */
+#line 528 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 62:
-#line 524 "perly.y" /* yacc.c:1646  */
+#line 530 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOGOP(OP_AND, 0, (ps[0].val.opval), (ps[-2].val.opval)); }
 
     break;
 
   case 63:
-#line 526 "perly.y" /* yacc.c:1646  */
+#line 532 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOGOP(OP_OR, 0, (ps[0].val.opval), (ps[-2].val.opval)); }
 
     break;
 
   case 64:
-#line 528 "perly.y" /* yacc.c:1646  */
+#line 534 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOOPOP(OPf_PARENS, 1, scalar((ps[0].val.opval)), (ps[-2].val.opval)); }
 
     break;
 
   case 65:
-#line 530 "perly.y" /* yacc.c:1646  */
+#line 536 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOOPOP(OPf_PARENS, 1, (ps[0].val.opval), (ps[-2].val.opval)); }
 
     break;
 
   case 66:
-#line 532 "perly.y" /* yacc.c:1646  */
+#line 538 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newFOROP(0, NULL, (ps[0].val.opval), (ps[-2].val.opval), NULL);
 			  parser->copline = (line_t)(ps[-1].val.ival); }
 
     break;
 
   case 67:
-#line 535 "perly.y" /* yacc.c:1646  */
-    { (yyval.opval) = newWHERESOOP((ps[0].val.opval), op_scope((ps[-2].val.opval))); }
+#line 541 "perly.y" /* yacc.c:1646  */
+    {
+			  OP *cond = (ps[0].val.opval);
+			  if ((ps[-1].val.ival))
+			    cond = newBINOP(OP_SMARTMATCH, 0, newDEFSVOP(),
+					    scalar(cond));
+			  (yyval.opval) = newWHERESOOP(cond, op_scope((ps[-2].val.opval)));
+			}
 
     break;
 
   case 68:
-#line 540 "perly.y" /* yacc.c:1646  */
+#line 552 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 69:
-#line 542 "perly.y" /* yacc.c:1646  */
+#line 554 "perly.y" /* yacc.c:1646  */
     {
 			  ((ps[0].val.opval))->op_flags |= OPf_PARENS;
 			  (yyval.opval) = op_scope((ps[0].val.opval));
@@ -668,7 +680,7 @@ case 2:
     break;
 
   case 70:
-#line 547 "perly.y" /* yacc.c:1646  */
+#line 559 "perly.y" /* yacc.c:1646  */
     { parser->copline = (line_t)(ps[-5].val.ival);
 			    (yyval.opval) = newCONDOP(0,
 				newSTATEOP(OPf_SPECIAL,NULL,(ps[-3].val.opval)),
@@ -679,19 +691,19 @@ case 2:
     break;
 
   case 71:
-#line 557 "perly.y" /* yacc.c:1646  */
+#line 569 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 72:
-#line 559 "perly.y" /* yacc.c:1646  */
+#line 571 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_scope((ps[0].val.opval)); }
 
     break;
 
   case 73:
-#line 564 "perly.y" /* yacc.c:1646  */
+#line 576 "perly.y" /* yacc.c:1646  */
     { (yyval.ival) = (PL_min_intro_pending &&
 			    PL_max_intro_pending >=  PL_min_intro_pending);
 			  intro_my(); }
@@ -699,13 +711,13 @@ case 2:
     break;
 
   case 74:
-#line 570 "perly.y" /* yacc.c:1646  */
+#line 582 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 76:
-#line 576 "perly.y" /* yacc.c:1646  */
+#line 588 "perly.y" /* yacc.c:1646  */
     { YYSTYPE tmplval;
 			  (void)scan_num("1", &tmplval);
 			  (yyval.opval) = tmplval.opval; }
@@ -713,118 +725,118 @@ case 2:
     break;
 
   case 78:
-#line 584 "perly.y" /* yacc.c:1646  */
+#line 596 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = invert(scalar((ps[0].val.opval))); }
 
     break;
 
   case 79:
-#line 589 "perly.y" /* yacc.c:1646  */
+#line 601 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); intro_my(); }
 
     break;
 
   case 80:
-#line 593 "perly.y" /* yacc.c:1646  */
+#line 605 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); intro_my(); }
 
     break;
 
   case 81:
-#line 596 "perly.y" /* yacc.c:1646  */
+#line 608 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 82:
-#line 597 "perly.y" /* yacc.c:1646  */
+#line 609 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 83:
-#line 601 "perly.y" /* yacc.c:1646  */
+#line 613 "perly.y" /* yacc.c:1646  */
     { (yyval.ival) = start_subparse(FALSE, 0);
 			    SAVEFREESV(PL_compcv); }
 
     break;
 
   case 84:
-#line 607 "perly.y" /* yacc.c:1646  */
+#line 619 "perly.y" /* yacc.c:1646  */
     { (yyval.ival) = start_subparse(FALSE, CVf_ANON);
 			    SAVEFREESV(PL_compcv); }
 
     break;
 
   case 85:
-#line 612 "perly.y" /* yacc.c:1646  */
+#line 624 "perly.y" /* yacc.c:1646  */
     { (yyval.ival) = start_subparse(TRUE, 0);
 			    SAVEFREESV(PL_compcv); }
 
     break;
 
   case 88:
-#line 623 "perly.y" /* yacc.c:1646  */
+#line 635 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 90:
-#line 629 "perly.y" /* yacc.c:1646  */
+#line 641 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 91:
-#line 631 "perly.y" /* yacc.c:1646  */
+#line 643 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 92:
-#line 633 "perly.y" /* yacc.c:1646  */
+#line 645 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 93:
-#line 638 "perly.y" /* yacc.c:1646  */
+#line 650 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 94:
-#line 640 "perly.y" /* yacc.c:1646  */
+#line 652 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 95:
-#line 651 "perly.y" /* yacc.c:1646  */
+#line 663 "perly.y" /* yacc.c:1646  */
     { parser->in_my = 0; (yyval.opval) = NULL; }
 
     break;
 
   case 96:
-#line 653 "perly.y" /* yacc.c:1646  */
+#line 665 "perly.y" /* yacc.c:1646  */
     { parser->in_my = 0; (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 97:
-#line 658 "perly.y" /* yacc.c:1646  */
+#line 670 "perly.y" /* yacc.c:1646  */
     { (yyval.ival) = '@'; }
 
     break;
 
   case 98:
-#line 660 "perly.y" /* yacc.c:1646  */
+#line 672 "perly.y" /* yacc.c:1646  */
     { (yyval.ival) = '%'; }
 
     break;
 
   case 99:
-#line 664 "perly.y" /* yacc.c:1646  */
+#line 676 "perly.y" /* yacc.c:1646  */
     {
                             I32 sigil   = (ps[-2].val.ival);
                             OP *var     = (ps[-1].val.opval);
@@ -844,25 +856,25 @@ case 2:
     break;
 
   case 100:
-#line 683 "perly.y" /* yacc.c:1646  */
+#line 695 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 101:
-#line 685 "perly.y" /* yacc.c:1646  */
+#line 697 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newOP(OP_NULL, 0); }
 
     break;
 
   case 102:
-#line 687 "perly.y" /* yacc.c:1646  */
+#line 699 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 103:
-#line 693 "perly.y" /* yacc.c:1646  */
+#line 705 "perly.y" /* yacc.c:1646  */
     {
                             OP *var     = (ps[-1].val.opval);
                             OP *defexpr = (ps[0].val.opval);
@@ -927,25 +939,25 @@ case 2:
     break;
 
   case 104:
-#line 758 "perly.y" /* yacc.c:1646  */
+#line 770 "perly.y" /* yacc.c:1646  */
     { parser->in_my = KEY_sigvar; (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 105:
-#line 760 "perly.y" /* yacc.c:1646  */
+#line 772 "perly.y" /* yacc.c:1646  */
     { parser->in_my = KEY_sigvar; (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 106:
-#line 766 "perly.y" /* yacc.c:1646  */
+#line 778 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[-1].val.opval); }
 
     break;
 
   case 107:
-#line 768 "perly.y" /* yacc.c:1646  */
+#line 780 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = op_append_list(OP_LINESEQ, (ps[-2].val.opval), (ps[0].val.opval));
 			}
@@ -953,25 +965,25 @@ case 2:
     break;
 
   case 108:
-#line 772 "perly.y" /* yacc.c:1646  */
+#line 784 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 109:
-#line 777 "perly.y" /* yacc.c:1646  */
+#line 789 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 110:
-#line 779 "perly.y" /* yacc.c:1646  */
+#line 791 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 111:
-#line 783 "perly.y" /* yacc.c:1646  */
+#line 795 "perly.y" /* yacc.c:1646  */
     {
                             ENTER;
                             SAVEIV(parser->sig_elems);
@@ -986,7 +998,7 @@ case 2:
     break;
 
   case 112:
-#line 795 "perly.y" /* yacc.c:1646  */
+#line 807 "perly.y" /* yacc.c:1646  */
     {
                             OP            *sigops = (ps[-1].val.opval);
                             UNOP_AUX_item *aux;
@@ -1025,37 +1037,37 @@ case 2:
     break;
 
   case 114:
-#line 835 "perly.y" /* yacc.c:1646  */
+#line 847 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 115:
-#line 840 "perly.y" /* yacc.c:1646  */
+#line 852 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOGOP(OP_AND, 0, (ps[-2].val.opval), (ps[0].val.opval)); }
 
     break;
 
   case 116:
-#line 842 "perly.y" /* yacc.c:1646  */
+#line 854 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOGOP((ps[-1].val.ival), 0, (ps[-2].val.opval), (ps[0].val.opval)); }
 
     break;
 
   case 117:
-#line 844 "perly.y" /* yacc.c:1646  */
+#line 856 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOGOP(OP_DOR, 0, (ps[-2].val.opval), (ps[0].val.opval)); }
 
     break;
 
   case 119:
-#line 850 "perly.y" /* yacc.c:1646  */
+#line 862 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[-1].val.opval); }
 
     break;
 
   case 120:
-#line 852 "perly.y" /* yacc.c:1646  */
+#line 864 "perly.y" /* yacc.c:1646  */
     {
 			  OP* term = (ps[0].val.opval);
 			  (yyval.opval) = op_append_elem(OP_LIST, (ps[-2].val.opval), term);
@@ -1064,7 +1076,7 @@ case 2:
     break;
 
   case 122:
-#line 861 "perly.y" /* yacc.c:1646  */
+#line 873 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_convert_list((ps[-2].val.ival), OPf_STACKED,
 				op_prepend_elem(OP_LIST, newGVREF((ps[-2].val.ival),(ps[-1].val.opval)), (ps[0].val.opval)) );
 			}
@@ -1072,7 +1084,7 @@ case 2:
     break;
 
   case 123:
-#line 865 "perly.y" /* yacc.c:1646  */
+#line 877 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_convert_list((ps[-4].val.ival), OPf_STACKED,
 				op_prepend_elem(OP_LIST, newGVREF((ps[-4].val.ival),(ps[-2].val.opval)), (ps[-1].val.opval)) );
 			}
@@ -1080,7 +1092,7 @@ case 2:
     break;
 
   case 124:
-#line 869 "perly.y" /* yacc.c:1646  */
+#line 881 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_convert_list(OP_ENTERSUB, OPf_STACKED,
 				op_append_elem(OP_LIST,
 				    op_prepend_elem(OP_LIST, scalar((ps[-5].val.opval)), (ps[-1].val.opval)),
@@ -1090,7 +1102,7 @@ case 2:
     break;
 
   case 125:
-#line 875 "perly.y" /* yacc.c:1646  */
+#line 887 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_convert_list(OP_ENTERSUB, OPf_STACKED,
 				op_append_elem(OP_LIST, scalar((ps[-2].val.opval)),
 				    newMETHOP(OP_METHOD, 0, (ps[0].val.opval))));
@@ -1099,7 +1111,7 @@ case 2:
     break;
 
   case 126:
-#line 880 "perly.y" /* yacc.c:1646  */
+#line 892 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_convert_list(OP_ENTERSUB, OPf_STACKED,
 				op_append_elem(OP_LIST,
 				    op_prepend_elem(OP_LIST, (ps[-1].val.opval), (ps[0].val.opval)),
@@ -1109,7 +1121,7 @@ case 2:
     break;
 
   case 127:
-#line 886 "perly.y" /* yacc.c:1646  */
+#line 898 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_convert_list(OP_ENTERSUB, OPf_STACKED,
 				op_append_elem(OP_LIST,
 				    op_prepend_elem(OP_LIST, (ps[-3].val.opval), (ps[-1].val.opval)),
@@ -1119,26 +1131,26 @@ case 2:
     break;
 
   case 128:
-#line 892 "perly.y" /* yacc.c:1646  */
+#line 904 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_convert_list((ps[-1].val.ival), 0, (ps[0].val.opval)); }
 
     break;
 
   case 129:
-#line 894 "perly.y" /* yacc.c:1646  */
+#line 906 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_convert_list((ps[-3].val.ival), 0, (ps[-1].val.opval)); }
 
     break;
 
   case 130:
-#line 896 "perly.y" /* yacc.c:1646  */
+#line 908 "perly.y" /* yacc.c:1646  */
     { SvREFCNT_inc_simple_void(PL_compcv);
 			  (yyval.opval) = newANONATTRSUB((ps[-1].val.ival), 0, NULL, (ps[0].val.opval)); }
 
     break;
 
   case 131:
-#line 899 "perly.y" /* yacc.c:1646  */
+#line 911 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED,
 				 op_append_elem(OP_LIST,
 				   op_prepend_elem(OP_LIST, (ps[-1].val.opval), (ps[0].val.opval)), (ps[-4].val.opval)));
@@ -1147,20 +1159,20 @@ case 2:
     break;
 
   case 134:
-#line 914 "perly.y" /* yacc.c:1646  */
+#line 926 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP(OP_GELEM, 0, (ps[-4].val.opval), scalar((ps[-2].val.opval))); }
 
     break;
 
   case 135:
-#line 916 "perly.y" /* yacc.c:1646  */
+#line 928 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP(OP_AELEM, 0, oopsAV((ps[-3].val.opval)), scalar((ps[-1].val.opval)));
 			}
 
     break;
 
   case 136:
-#line 919 "perly.y" /* yacc.c:1646  */
+#line 931 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP(OP_AELEM, 0,
 					ref(newAVREF((ps[-4].val.opval)),OP_RV2AV),
 					scalar((ps[-1].val.opval)));
@@ -1169,7 +1181,7 @@ case 2:
     break;
 
   case 137:
-#line 924 "perly.y" /* yacc.c:1646  */
+#line 936 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP(OP_AELEM, 0,
 					ref(newAVREF((ps[-3].val.opval)),OP_RV2AV),
 					scalar((ps[-1].val.opval)));
@@ -1178,14 +1190,14 @@ case 2:
     break;
 
   case 138:
-#line 929 "perly.y" /* yacc.c:1646  */
+#line 941 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP(OP_HELEM, 0, oopsHV((ps[-4].val.opval)), jmaybe((ps[-2].val.opval)));
 			}
 
     break;
 
   case 139:
-#line 932 "perly.y" /* yacc.c:1646  */
+#line 944 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP(OP_HELEM, 0,
 					ref(newHVREF((ps[-5].val.opval)),OP_RV2HV),
 					jmaybe((ps[-2].val.opval))); }
@@ -1193,7 +1205,7 @@ case 2:
     break;
 
   case 140:
-#line 936 "perly.y" /* yacc.c:1646  */
+#line 948 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP(OP_HELEM, 0,
 					ref(newHVREF((ps[-4].val.opval)),OP_RV2HV),
 					jmaybe((ps[-2].val.opval))); }
@@ -1201,14 +1213,14 @@ case 2:
     break;
 
   case 141:
-#line 940 "perly.y" /* yacc.c:1646  */
+#line 952 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED,
 				   newCVREF(0, scalar((ps[-3].val.opval)))); }
 
     break;
 
   case 142:
-#line 943 "perly.y" /* yacc.c:1646  */
+#line 955 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED,
 				   op_append_elem(OP_LIST, (ps[-1].val.opval),
 				       newCVREF(0, scalar((ps[-4].val.opval))))); }
@@ -1216,7 +1228,7 @@ case 2:
     break;
 
   case 143:
-#line 948 "perly.y" /* yacc.c:1646  */
+#line 960 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED,
 				   op_append_elem(OP_LIST, (ps[-1].val.opval),
 					       newCVREF(0, scalar((ps[-3].val.opval))))); }
@@ -1224,44 +1236,44 @@ case 2:
     break;
 
   case 144:
-#line 952 "perly.y" /* yacc.c:1646  */
+#line 964 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED,
 				   newCVREF(0, scalar((ps[-2].val.opval)))); }
 
     break;
 
   case 145:
-#line 955 "perly.y" /* yacc.c:1646  */
+#line 967 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newSLICEOP(0, (ps[-1].val.opval), (ps[-4].val.opval)); }
 
     break;
 
   case 146:
-#line 957 "perly.y" /* yacc.c:1646  */
+#line 969 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newSLICEOP(0, (ps[-1].val.opval), (ps[-3].val.opval)); }
 
     break;
 
   case 147:
-#line 959 "perly.y" /* yacc.c:1646  */
+#line 971 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newSLICEOP(0, (ps[-1].val.opval), NULL); }
 
     break;
 
   case 148:
-#line 964 "perly.y" /* yacc.c:1646  */
+#line 976 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newASSIGNOP(OPf_STACKED, (ps[-2].val.opval), (ps[-1].val.ival), (ps[0].val.opval)); }
 
     break;
 
   case 149:
-#line 966 "perly.y" /* yacc.c:1646  */
+#line 978 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP((ps[-1].val.ival), 0, scalar((ps[-2].val.opval)), scalar((ps[0].val.opval))); }
 
     break;
 
   case 150:
-#line 968 "perly.y" /* yacc.c:1646  */
+#line 980 "perly.y" /* yacc.c:1646  */
     {   if ((ps[-1].val.ival) != OP_REPEAT)
 				scalar((ps[-2].val.opval));
 			    (yyval.opval) = newBINOP((ps[-1].val.ival), 0, (ps[-2].val.opval), scalar((ps[0].val.opval)));
@@ -1270,111 +1282,111 @@ case 2:
     break;
 
   case 151:
-#line 973 "perly.y" /* yacc.c:1646  */
+#line 985 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP((ps[-1].val.ival), 0, scalar((ps[-2].val.opval)), scalar((ps[0].val.opval))); }
 
     break;
 
   case 152:
-#line 975 "perly.y" /* yacc.c:1646  */
+#line 987 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP((ps[-1].val.ival), 0, scalar((ps[-2].val.opval)), scalar((ps[0].val.opval))); }
 
     break;
 
   case 153:
-#line 977 "perly.y" /* yacc.c:1646  */
+#line 989 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP((ps[-1].val.ival), 0, scalar((ps[-2].val.opval)), scalar((ps[0].val.opval))); }
 
     break;
 
   case 154:
-#line 979 "perly.y" /* yacc.c:1646  */
+#line 991 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP((ps[-1].val.ival), 0, scalar((ps[-2].val.opval)), scalar((ps[0].val.opval))); }
 
     break;
 
   case 155:
-#line 981 "perly.y" /* yacc.c:1646  */
+#line 993 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP((ps[-1].val.ival), 0, scalar((ps[-2].val.opval)), scalar((ps[0].val.opval))); }
 
     break;
 
   case 156:
-#line 983 "perly.y" /* yacc.c:1646  */
+#line 995 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newBINOP((ps[-1].val.ival), 0, scalar((ps[-2].val.opval)), scalar((ps[0].val.opval))); }
 
     break;
 
   case 157:
-#line 985 "perly.y" /* yacc.c:1646  */
+#line 997 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newRANGE((ps[-1].val.ival), scalar((ps[-2].val.opval)), scalar((ps[0].val.opval))); }
 
     break;
 
   case 158:
-#line 987 "perly.y" /* yacc.c:1646  */
+#line 999 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOGOP(OP_AND, 0, (ps[-2].val.opval), (ps[0].val.opval)); }
 
     break;
 
   case 159:
-#line 989 "perly.y" /* yacc.c:1646  */
+#line 1001 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOGOP(OP_OR, 0, (ps[-2].val.opval), (ps[0].val.opval)); }
 
     break;
 
   case 160:
-#line 991 "perly.y" /* yacc.c:1646  */
+#line 1003 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOGOP(OP_DOR, 0, (ps[-2].val.opval), (ps[0].val.opval)); }
 
     break;
 
   case 161:
-#line 993 "perly.y" /* yacc.c:1646  */
+#line 1005 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = bind_match((ps[-1].val.ival), (ps[-2].val.opval), (ps[0].val.opval)); }
 
     break;
 
   case 162:
-#line 998 "perly.y" /* yacc.c:1646  */
+#line 1010 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_NEGATE, 0, scalar((ps[0].val.opval))); }
 
     break;
 
   case 163:
-#line 1000 "perly.y" /* yacc.c:1646  */
+#line 1012 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 164:
-#line 1003 "perly.y" /* yacc.c:1646  */
+#line 1015 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_NOT, 0, scalar((ps[0].val.opval))); }
 
     break;
 
   case 165:
-#line 1005 "perly.y" /* yacc.c:1646  */
+#line 1017 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP((ps[-1].val.ival), 0, scalar((ps[0].val.opval))); }
 
     break;
 
   case 166:
-#line 1007 "perly.y" /* yacc.c:1646  */
+#line 1019 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_POSTINC, 0,
 					op_lvalue(scalar((ps[-1].val.opval)), OP_POSTINC)); }
 
     break;
 
   case 167:
-#line 1010 "perly.y" /* yacc.c:1646  */
+#line 1022 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_POSTDEC, 0,
 					op_lvalue(scalar((ps[-1].val.opval)), OP_POSTDEC));}
 
     break;
 
   case 168:
-#line 1013 "perly.y" /* yacc.c:1646  */
+#line 1025 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_convert_list(OP_JOIN, 0,
 				       op_append_elem(
 					OP_LIST,
@@ -1389,52 +1401,52 @@ case 2:
     break;
 
   case 169:
-#line 1024 "perly.y" /* yacc.c:1646  */
+#line 1036 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_PREINC, 0,
 					op_lvalue(scalar((ps[0].val.opval)), OP_PREINC)); }
 
     break;
 
   case 170:
-#line 1027 "perly.y" /* yacc.c:1646  */
+#line 1039 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_PREDEC, 0,
 					op_lvalue(scalar((ps[0].val.opval)), OP_PREDEC)); }
 
     break;
 
   case 171:
-#line 1034 "perly.y" /* yacc.c:1646  */
+#line 1046 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newANONLIST((ps[-1].val.opval)); }
 
     break;
 
   case 172:
-#line 1036 "perly.y" /* yacc.c:1646  */
+#line 1048 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newANONLIST(NULL);}
 
     break;
 
   case 173:
-#line 1038 "perly.y" /* yacc.c:1646  */
+#line 1050 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newANONHASH((ps[-2].val.opval)); }
 
     break;
 
   case 174:
-#line 1040 "perly.y" /* yacc.c:1646  */
+#line 1052 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newANONHASH(NULL); }
 
     break;
 
   case 175:
-#line 1042 "perly.y" /* yacc.c:1646  */
+#line 1054 "perly.y" /* yacc.c:1646  */
     { SvREFCNT_inc_simple_void(PL_compcv);
 			  (yyval.opval) = newANONATTRSUB((ps[-3].val.ival), (ps[-2].val.opval), (ps[-1].val.opval), (ps[0].val.opval)); }
 
     break;
 
   case 176:
-#line 1045 "perly.y" /* yacc.c:1646  */
+#line 1057 "perly.y" /* yacc.c:1646  */
     {
 			  OP *body;
 			  if (parser->copline > (line_t)(ps[-2].val.ival))
@@ -1448,103 +1460,103 @@ case 2:
     break;
 
   case 177:
-#line 1059 "perly.y" /* yacc.c:1646  */
+#line 1071 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = dofile((ps[0].val.opval), (ps[-1].val.ival));}
 
     break;
 
   case 178:
-#line 1061 "perly.y" /* yacc.c:1646  */
+#line 1073 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_NULL, OPf_SPECIAL, op_scope((ps[0].val.opval)));}
 
     break;
 
   case 183:
-#line 1069 "perly.y" /* yacc.c:1646  */
+#line 1081 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newCONDOP(0, (ps[-4].val.opval), (ps[-2].val.opval), (ps[0].val.opval)); }
 
     break;
 
   case 184:
-#line 1071 "perly.y" /* yacc.c:1646  */
+#line 1083 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_REFGEN, 0, (ps[0].val.opval)); }
 
     break;
 
   case 185:
-#line 1073 "perly.y" /* yacc.c:1646  */
+#line 1085 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_REFGEN, 0, localize((ps[0].val.opval),1)); }
 
     break;
 
   case 186:
-#line 1075 "perly.y" /* yacc.c:1646  */
+#line 1087 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 187:
-#line 1077 "perly.y" /* yacc.c:1646  */
+#line 1089 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = localize((ps[0].val.opval),0); }
 
     break;
 
   case 188:
-#line 1079 "perly.y" /* yacc.c:1646  */
+#line 1091 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = sawparens((ps[-1].val.opval)); }
 
     break;
 
   case 189:
-#line 1081 "perly.y" /* yacc.c:1646  */
+#line 1093 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 190:
-#line 1083 "perly.y" /* yacc.c:1646  */
+#line 1095 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = sawparens(newNULLLIST()); }
 
     break;
 
   case 191:
-#line 1085 "perly.y" /* yacc.c:1646  */
+#line 1097 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 192:
-#line 1087 "perly.y" /* yacc.c:1646  */
+#line 1099 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 193:
-#line 1089 "perly.y" /* yacc.c:1646  */
+#line 1101 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 194:
-#line 1091 "perly.y" /* yacc.c:1646  */
+#line 1103 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 195:
-#line 1093 "perly.y" /* yacc.c:1646  */
+#line 1105 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_AV2ARYLEN, 0, ref((ps[0].val.opval), OP_AV2ARYLEN));}
 
     break;
 
   case 196:
-#line 1095 "perly.y" /* yacc.c:1646  */
+#line 1107 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 197:
-#line 1097 "perly.y" /* yacc.c:1646  */
+#line 1109 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_prepend_elem(OP_ASLICE,
 				newOP(OP_PUSHMARK, 0),
 				    newLISTOP(OP_ASLICE, 0,
@@ -1558,7 +1570,7 @@ case 2:
     break;
 
   case 198:
-#line 1107 "perly.y" /* yacc.c:1646  */
+#line 1119 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_prepend_elem(OP_KVASLICE,
 				newOP(OP_PUSHMARK, 0),
 				    newLISTOP(OP_KVASLICE, 0,
@@ -1572,7 +1584,7 @@ case 2:
     break;
 
   case 199:
-#line 1117 "perly.y" /* yacc.c:1646  */
+#line 1129 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_prepend_elem(OP_HSLICE,
 				newOP(OP_PUSHMARK, 0),
 				    newLISTOP(OP_HSLICE, 0,
@@ -1586,7 +1598,7 @@ case 2:
     break;
 
   case 200:
-#line 1127 "perly.y" /* yacc.c:1646  */
+#line 1139 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_prepend_elem(OP_KVHSLICE,
 				newOP(OP_PUSHMARK, 0),
 				    newLISTOP(OP_KVHSLICE, 0,
@@ -1600,26 +1612,26 @@ case 2:
     break;
 
   case 201:
-#line 1137 "perly.y" /* yacc.c:1646  */
+#line 1149 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 202:
-#line 1139 "perly.y" /* yacc.c:1646  */
+#line 1151 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, 0, scalar((ps[0].val.opval))); }
 
     break;
 
   case 203:
-#line 1141 "perly.y" /* yacc.c:1646  */
+#line 1153 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar((ps[-2].val.opval)));
 			}
 
     break;
 
   case 204:
-#line 1144 "perly.y" /* yacc.c:1646  */
+#line 1156 "perly.y" /* yacc.c:1646  */
     {
 			  (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED,
 				op_append_elem(OP_LIST, (ps[-1].val.opval), scalar((ps[-3].val.opval))));
@@ -1628,7 +1640,7 @@ case 2:
     break;
 
   case 205:
-#line 1149 "perly.y" /* yacc.c:1646  */
+#line 1161 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED,
 			    op_append_elem(OP_LIST, (ps[0].val.opval), scalar((ps[-1].val.opval))));
 			}
@@ -1636,130 +1648,130 @@ case 2:
     break;
 
   case 206:
-#line 1153 "perly.y" /* yacc.c:1646  */
+#line 1165 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newSVREF((ps[-3].val.opval)); }
 
     break;
 
   case 207:
-#line 1155 "perly.y" /* yacc.c:1646  */
+#line 1167 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newAVREF((ps[-3].val.opval)); }
 
     break;
 
   case 208:
-#line 1157 "perly.y" /* yacc.c:1646  */
+#line 1169 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newHVREF((ps[-3].val.opval)); }
 
     break;
 
   case 209:
-#line 1159 "perly.y" /* yacc.c:1646  */
+#line 1171 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, 0,
 				       scalar(newCVREF((ps[-1].val.ival),(ps[-3].val.opval)))); }
 
     break;
 
   case 210:
-#line 1162 "perly.y" /* yacc.c:1646  */
+#line 1174 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newGVREF(0,(ps[-3].val.opval)); }
 
     break;
 
   case 211:
-#line 1164 "perly.y" /* yacc.c:1646  */
+#line 1176 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newOP((ps[0].val.ival), OPf_SPECIAL);
 			    PL_hints |= HINT_BLOCK_SCOPE; }
 
     break;
 
   case 212:
-#line 1167 "perly.y" /* yacc.c:1646  */
+#line 1179 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newLOOPEX((ps[-1].val.ival),(ps[0].val.opval)); }
 
     break;
 
   case 213:
-#line 1169 "perly.y" /* yacc.c:1646  */
+#line 1181 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_NOT, 0, scalar((ps[0].val.opval))); }
 
     break;
 
   case 214:
-#line 1171 "perly.y" /* yacc.c:1646  */
+#line 1183 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newOP((ps[0].val.ival), 0); }
 
     break;
 
   case 215:
-#line 1173 "perly.y" /* yacc.c:1646  */
+#line 1185 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP((ps[-1].val.ival), 0, (ps[0].val.opval)); }
 
     break;
 
   case 216:
-#line 1175 "perly.y" /* yacc.c:1646  */
+#line 1187 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP((ps[-1].val.ival), 0, (ps[0].val.opval)); }
 
     break;
 
   case 217:
-#line 1177 "perly.y" /* yacc.c:1646  */
+#line 1189 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newOP(OP_REQUIRE, (ps[0].val.ival) ? OPf_SPECIAL : 0); }
 
     break;
 
   case 218:
-#line 1179 "perly.y" /* yacc.c:1646  */
+#line 1191 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_REQUIRE, (ps[-1].val.ival) ? OPf_SPECIAL : 0, (ps[0].val.opval)); }
 
     break;
 
   case 219:
-#line 1181 "perly.y" /* yacc.c:1646  */
+#line 1193 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar((ps[0].val.opval))); }
 
     break;
 
   case 220:
-#line 1183 "perly.y" /* yacc.c:1646  */
+#line 1195 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED,
 			    op_append_elem(OP_LIST, (ps[0].val.opval), scalar((ps[-1].val.opval)))); }
 
     break;
 
   case 221:
-#line 1186 "perly.y" /* yacc.c:1646  */
+#line 1198 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newOP((ps[0].val.ival), 0); }
 
     break;
 
   case 222:
-#line 1188 "perly.y" /* yacc.c:1646  */
+#line 1200 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newOP((ps[-2].val.ival), 0);}
 
     break;
 
   case 223:
-#line 1190 "perly.y" /* yacc.c:1646  */
+#line 1202 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 224:
-#line 1192 "perly.y" /* yacc.c:1646  */
+#line 1204 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[-2].val.opval); }
 
     break;
 
   case 225:
-#line 1194 "perly.y" /* yacc.c:1646  */
+#line 1206 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar((ps[0].val.opval))); }
 
     break;
 
   case 226:
-#line 1196 "perly.y" /* yacc.c:1646  */
+#line 1208 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = ((ps[-2].val.ival) == OP_NOT)
                           ? newUNOP((ps[-2].val.ival), 0, newSVOP(OP_CONST, 0, newSViv(0)))
                           : newOP((ps[-2].val.ival), OPf_SPECIAL); }
@@ -1767,13 +1779,13 @@ case 2:
     break;
 
   case 227:
-#line 1200 "perly.y" /* yacc.c:1646  */
+#line 1212 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP((ps[-3].val.ival), 0, (ps[-1].val.opval)); }
 
     break;
 
   case 228:
-#line 1202 "perly.y" /* yacc.c:1646  */
+#line 1214 "perly.y" /* yacc.c:1646  */
     {
 			    if (   (ps[0].val.opval)->op_type != OP_TRANS
 			        && (ps[0].val.opval)->op_type != OP_TRANSR
@@ -1788,115 +1800,115 @@ case 2:
     break;
 
   case 229:
-#line 1213 "perly.y" /* yacc.c:1646  */
+#line 1225 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = pmruntime((ps[-5].val.opval), (ps[-2].val.opval), (ps[-1].val.opval), 1, (ps[-4].val.ival)); }
 
     break;
 
   case 233:
-#line 1221 "perly.y" /* yacc.c:1646  */
+#line 1233 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = my_attrs((ps[-1].val.opval),(ps[0].val.opval)); }
 
     break;
 
   case 234:
-#line 1223 "perly.y" /* yacc.c:1646  */
+#line 1235 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = localize((ps[0].val.opval),1); }
 
     break;
 
   case 235:
-#line 1225 "perly.y" /* yacc.c:1646  */
+#line 1237 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newUNOP(OP_REFGEN, 0, my_attrs((ps[-1].val.opval),(ps[0].val.opval))); }
 
     break;
 
   case 236:
-#line 1230 "perly.y" /* yacc.c:1646  */
+#line 1242 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = sawparens((ps[-1].val.opval)); }
 
     break;
 
   case 237:
-#line 1232 "perly.y" /* yacc.c:1646  */
+#line 1244 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = sawparens(newNULLLIST()); }
 
     break;
 
   case 238:
-#line 1235 "perly.y" /* yacc.c:1646  */
+#line 1247 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 239:
-#line 1237 "perly.y" /* yacc.c:1646  */
+#line 1249 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 240:
-#line 1239 "perly.y" /* yacc.c:1646  */
+#line 1251 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 241:
-#line 1244 "perly.y" /* yacc.c:1646  */
+#line 1256 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 242:
-#line 1246 "perly.y" /* yacc.c:1646  */
+#line 1258 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 243:
-#line 1250 "perly.y" /* yacc.c:1646  */
+#line 1262 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 244:
-#line 1252 "perly.y" /* yacc.c:1646  */
+#line 1264 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 245:
-#line 1256 "perly.y" /* yacc.c:1646  */
+#line 1268 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = NULL; }
 
     break;
 
   case 246:
-#line 1258 "perly.y" /* yacc.c:1646  */
+#line 1270 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
 
   case 247:
-#line 1264 "perly.y" /* yacc.c:1646  */
+#line 1276 "perly.y" /* yacc.c:1646  */
     { parser->in_my = 0; (yyval.opval) = my((ps[0].val.opval)); }
 
     break;
 
   case 255:
-#line 1281 "perly.y" /* yacc.c:1646  */
+#line 1293 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newCVREF((ps[-1].val.ival),(ps[0].val.opval)); }
 
     break;
 
   case 256:
-#line 1285 "perly.y" /* yacc.c:1646  */
+#line 1297 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newSVREF((ps[0].val.opval)); }
 
     break;
 
   case 257:
-#line 1289 "perly.y" /* yacc.c:1646  */
+#line 1301 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newAVREF((ps[0].val.opval));
 			  if ((yyval.opval)) (yyval.opval)->op_private |= (ps[-1].val.ival);
 			}
@@ -1904,7 +1916,7 @@ case 2:
     break;
 
   case 258:
-#line 1295 "perly.y" /* yacc.c:1646  */
+#line 1307 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newHVREF((ps[0].val.opval));
 			  if ((yyval.opval)) (yyval.opval)->op_private |= (ps[-1].val.ival);
 			}
@@ -1912,61 +1924,61 @@ case 2:
     break;
 
   case 259:
-#line 1301 "perly.y" /* yacc.c:1646  */
+#line 1313 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newAVREF((ps[0].val.opval)); }
 
     break;
 
   case 260:
-#line 1303 "perly.y" /* yacc.c:1646  */
+#line 1315 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newAVREF((ps[-3].val.opval)); }
 
     break;
 
   case 261:
-#line 1307 "perly.y" /* yacc.c:1646  */
+#line 1319 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newGVREF(0,(ps[0].val.opval)); }
 
     break;
 
   case 263:
-#line 1312 "perly.y" /* yacc.c:1646  */
+#line 1324 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newAVREF((ps[-2].val.opval)); }
 
     break;
 
   case 265:
-#line 1317 "perly.y" /* yacc.c:1646  */
+#line 1329 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newHVREF((ps[-2].val.opval)); }
 
     break;
 
   case 267:
-#line 1322 "perly.y" /* yacc.c:1646  */
+#line 1334 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = newGVREF(0,(ps[-2].val.opval)); }
 
     break;
 
   case 268:
-#line 1327 "perly.y" /* yacc.c:1646  */
+#line 1339 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = scalar((ps[0].val.opval)); }
 
     break;
 
   case 269:
-#line 1329 "perly.y" /* yacc.c:1646  */
+#line 1341 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = scalar((ps[0].val.opval)); }
 
     break;
 
   case 270:
-#line 1331 "perly.y" /* yacc.c:1646  */
+#line 1343 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = op_scope((ps[0].val.opval)); }
 
     break;
 
   case 271:
-#line 1334 "perly.y" /* yacc.c:1646  */
+#line 1346 "perly.y" /* yacc.c:1646  */
     { (yyval.opval) = (ps[0].val.opval); }
 
     break;
@@ -1977,6 +1989,6 @@ case 2:
     
 
 /* Generated from:
- * f62d35e9a10a10071f1ac20676ddc12abcffbef44a24ef694c36201e994d0900 perly.y
+ * 1d0c087affbf85a8f1482eb4d34eefd435666c6d9e1cb4d7f9d1aeb62b37e907 perly.y
  * b6fae5748f9bef6db4740aa5e122b84ac5181852d42474d0ecad621fa4253306 regen_perly.pl
  * ex: set ro: */
diff --git a/perly.h b/perly.h
index 4ac8572..02561f7 100644
--- a/perly.h
+++ b/perly.h
@@ -180,6 +180,6 @@ int yyparse (void);
 
 
 /* Generated from:
- * f62d35e9a10a10071f1ac20676ddc12abcffbef44a24ef694c36201e994d0900 perly.y
+ * 1d0c087affbf85a8f1482eb4d34eefd435666c6d9e1cb4d7f9d1aeb62b37e907 perly.y
  * b6fae5748f9bef6db4740aa5e122b84ac5181852d42474d0ecad621fa4253306 regen_perly.pl
  * ex: set ro: */
diff --git a/perly.tab b/perly.tab
index cb73d61..001de77 100644
--- a/perly.tab
+++ b/perly.tab
@@ -73,30 +73,30 @@ static const yytype_uint16 yyrline[] =
      165,   164,   178,   177,   190,   198,   206,   210,   218,   224,
      225,   235,   236,   245,   249,   253,   257,   264,   266,   277,
      276,   310,   309,   348,   356,   355,   364,   370,   376,   381,
-     383,   390,   398,   400,   397,   417,   422,   429,   428,   443,
-     451,   457,   464,   463,   478,   482,   487,   495,   513,   514,
-     519,   521,   523,   525,   527,   529,   531,   534,   540,   541,
-     546,   557,   558,   564,   570,   571,   576,   579,   583,   588,
-     592,   596,   597,   601,   607,   612,   617,   618,   623,   624,
-     629,   630,   632,   637,   639,   651,   652,   657,   659,   663,
-     683,   684,   686,   692,   757,   759,   765,   767,   771,   777,
-     778,   783,   782,   834,   835,   839,   841,   843,   845,   849,
-     851,   856,   860,   864,   868,   874,   879,   885,   891,   893,
-     896,   895,   906,   907,   911,   915,   918,   923,   928,   931,
-     935,   939,   942,   947,   951,   954,   956,   958,   963,   965,
-     967,   972,   974,   976,   978,   980,   982,   984,   986,   988,
-     990,   992,   997,   999,  1002,  1004,  1006,  1009,  1012,  1023,
-    1026,  1033,  1035,  1037,  1039,  1041,  1044,  1058,  1060,  1064,
-    1065,  1066,  1067,  1068,  1070,  1072,  1074,  1076,  1078,  1080,
-    1082,  1084,  1086,  1088,  1090,  1092,  1094,  1096,  1106,  1116,
-    1126,  1136,  1138,  1140,  1143,  1148,  1152,  1154,  1156,  1158,
-    1161,  1163,  1166,  1168,  1170,  1172,  1174,  1176,  1178,  1180,
-    1182,  1185,  1187,  1189,  1191,  1193,  1195,  1199,  1202,  1201,
-    1214,  1215,  1216,  1220,  1222,  1224,  1229,  1231,  1234,  1236,
-    1238,  1243,  1245,  1250,  1251,  1256,  1257,  1263,  1267,  1268,
-    1269,  1272,  1273,  1276,  1277,  1280,  1284,  1288,  1294,  1300,
-    1302,  1306,  1310,  1311,  1315,  1316,  1320,  1321,  1326,  1328,
-    1330,  1333
+     389,   396,   404,   406,   403,   423,   428,   435,   434,   449,
+     457,   463,   470,   469,   484,   488,   493,   501,   519,   520,
+     525,   527,   529,   531,   533,   535,   537,   540,   552,   553,
+     558,   569,   570,   576,   582,   583,   588,   591,   595,   600,
+     604,   608,   609,   613,   619,   624,   629,   630,   635,   636,
+     641,   642,   644,   649,   651,   663,   664,   669,   671,   675,
+     695,   696,   698,   704,   769,   771,   777,   779,   783,   789,
+     790,   795,   794,   846,   847,   851,   853,   855,   857,   861,
+     863,   868,   872,   876,   880,   886,   891,   897,   903,   905,
+     908,   907,   918,   919,   923,   927,   930,   935,   940,   943,
+     947,   951,   954,   959,   963,   966,   968,   970,   975,   977,
+     979,   984,   986,   988,   990,   992,   994,   996,   998,  1000,
+    1002,  1004,  1009,  1011,  1014,  1016,  1018,  1021,  1024,  1035,
+    1038,  1045,  1047,  1049,  1051,  1053,  1056,  1070,  1072,  1076,
+    1077,  1078,  1079,  1080,  1082,  1084,  1086,  1088,  1090,  1092,
+    1094,  1096,  1098,  1100,  1102,  1104,  1106,  1108,  1118,  1128,
+    1138,  1148,  1150,  1152,  1155,  1160,  1164,  1166,  1168,  1170,
+    1173,  1175,  1178,  1180,  1182,  1184,  1186,  1188,  1190,  1192,
+    1194,  1197,  1199,  1201,  1203,  1205,  1207,  1211,  1214,  1213,
+    1226,  1227,  1228,  1232,  1234,  1236,  1241,  1243,  1246,  1248,
+    1250,  1255,  1257,  1262,  1263,  1268,  1269,  1275,  1279,  1280,
+    1281,  1284,  1285,  1288,  1289,  1292,  1296,  1300,  1306,  1312,
+    1314,  1318,  1322,  1323,  1327,  1328,  1332,  1333,  1338,  1340,
+    1342,  1345
 };
 #endif
 
@@ -1103,6 +1103,6 @@ static const toketypes yy_type_tab[] =
 };
 
 /* Generated from:
- * f62d35e9a10a10071f1ac20676ddc12abcffbef44a24ef694c36201e994d0900 perly.y
+ * 1d0c087affbf85a8f1482eb4d34eefd435666c6d9e1cb4d7f9d1aeb62b37e907 perly.y
  * b6fae5748f9bef6db4740aa5e122b84ac5181852d42474d0ecad621fa4253306 regen_perly.pl
  * ex: set ro: */
diff --git a/perly.y b/perly.y
index 8191d82..4ef8478 100644
--- a/perly.y
+++ b/perly.y
@@ -379,7 +379,13 @@ barestmt:	PLUGSTMT
 			  parser->copline = (line_t)$1;
 			}
 	|	WHERESO '(' remember mexpr ')' mblock
-			{ $$ = block_end($3, newWHERESOOP($4, op_scope($6))); }
+			{
+			  OP *cond = $4;
+			  if ($1)
+			    cond = newBINOP(OP_SMARTMATCH, 0, newDEFSVOP(),
+					    scalar(cond));
+			  $$ = block_end($3, newWHERESOOP(cond, op_scope($6)));
+			}
 	|	WHILE '(' remember texpr ')' mintro mblock cont
 			{
 			  $$ = block_end($3,
@@ -532,7 +538,13 @@ sideff	:	error
 			{ $$ = newFOROP(0, NULL, $3, $1, NULL);
 			  parser->copline = (line_t)$2; }
 	|	expr WHERESO expr
-			{ $$ = newWHERESOOP($3, op_scope($1)); }
+			{
+			  OP *cond = $3;
+			  if ($2)
+			    cond = newBINOP(OP_SMARTMATCH, 0, newDEFSVOP(),
+					    scalar(cond));
+			  $$ = newWHERESOOP(cond, op_scope($1));
+			}
 	;
 
 /* else and elsif blocks */
diff --git a/pod/perldiag.pod b/pod/perldiag.pod
index f5e678c..2ce6668 100644
--- a/pod/perldiag.pod
+++ b/pod/perldiag.pod
@@ -824,7 +824,8 @@ but then $foo no longer contains a glob.
 
 =item Can't "continue" outside a whereso block
 
-(F) You called C<continue>, but you're not inside a C<whereso> block.
+(F) You called C<continue>, but you're not inside a C<whereis> or
+C<whereso> block.
 
 =item Can't create pipe mailbox
 
@@ -1078,13 +1079,14 @@ L<perlfunc/last>.
 
 =item Can't leave "whereso" outside a loop block
 
-(F) Control reached the end of a C<whereso> block that isn't inside any
-loop (including a C<given> block).  An implicit C<next> occurs here,
-which requires a loop to jump to.  You probably wanted the C<whereso> to be
-inside a C<given> block.  Note that you won't get this error if the match
-controlling the C<whereso> fails, or if you use an explicit C<continue> to
-avoid reaching the end of the block.  But if you rely on not reaching the
-implicit C<next> then you probably didn't want C<whereso>, but rather C<if>.
+(F) Control reached the end of a C<whereis> or C<whereso> block that
+isn't inside any loop (including a C<given> block).  An implicit C<next>
+occurs here, which requires a loop to jump to.  You probably wanted the
+C<whereis> or C<whereso> to be inside a C<given> block.  Note that you
+won't get this error if the match controlling the C<whereis> or C<whereso>
+fails, or if you use an explicit C<continue> to avoid reaching the end
+of the block.  But if you rely on not reaching the implicit C<next>
+then you probably didn't want C<whereis> or C<whereso>, but rather C<if>.
 
 =item Can't linearize anonymous symbol table
 
@@ -7414,6 +7416,12 @@ but in actual fact, you got
 
 So put in parentheses to say what you really mean.
 
+=item whereis is experimental
+
+(S experimental::smartmatch) C<whereis> is experimental, and its behavior
+may change or it may even be removed in any future release of perl.
+See the explanation under L<perlsyn/Switch Statements>.
+
 =item whereso is experimental
 
 (S experimental::smartmatch) C<whereso> is experimental, and its behavior
diff --git a/pod/perlexperiment.pod b/pod/perlexperiment.pod
index f750fd2..98b6b1a 100644
--- a/pod/perlexperiment.pod
+++ b/pod/perlexperiment.pod
@@ -30,8 +30,7 @@ L<[perl #119317]|https://rt.perl.org/rt3/Ticket/Display.html?id=119317>.
 
 For historical reasons, the single experiment covers both the smart
 match operator (C<~~>) and the switch-related compound statements
-(C<given>/C<whereso>), which apart from the shared warning category are now
-unrelated in behaviour.
+(C<given>/C<whereis>/C<whereso>).
 
 =item Pluggable keywords
 
diff --git a/pod/perlfunc.pod b/pod/perlfunc.pod
index c304c03..c0536e0 100644
--- a/pod/perlfunc.pod
+++ b/pod/perlfunc.pod
@@ -421,8 +421,8 @@ L<C<time>|/time>, L<C<times>|/times>
 C<and>, C<AUTOLOAD>, C<BEGIN>, C<CHECK>, C<cmp>, C<CORE>, C<__DATA__>,
 C<DESTROY>, C<else>, C<elseif>, C<elsif>, C<END>, C<__END__>,
 C<eq>, C<for>, C<foreach>, C<ge>, C<given>, C<gt>, C<if>, C<INIT>, C<le>,
-C<lt>, C<ne>, C<not>, C<or>, C<UNITCHECK>, C<unless>, C<until>, C<whereso>,
-C<while>, C<x>, C<xor>
+C<lt>, C<ne>, C<not>, C<or>, C<UNITCHECK>, C<unless>, C<until>,
+C<whereis>, C<whereso>, C<while>, C<x>, C<xor>
 
 =back
 
@@ -1318,7 +1318,8 @@ using an empty one, logically enough, so L<C<next>|/next LABEL> goes
 directly back to check the condition at the top of the loop.
 
 When there is no BLOCK, L<C<continue>|/continue BLOCK> is a function
-that exits the current C<whereso> block, avoiding the implicit C<next>
+that exits the current C<whereis> or C<whereso> block,
+avoiding the implicit C<next>
 that happens when execution reaches the end of such a block.
 In Perl 5.14 and earlier, this form of
 L<C<continue>|/continue BLOCK> was only available when the
@@ -10085,6 +10086,8 @@ Statements">.
 
 =item given
 
+=item whereis
+
 =item whereso
 
 These flow-control keywords related to the experimental switch feature are
diff --git a/pod/perlsyn.pod b/pod/perlsyn.pod
index ae7bb03..7d41ecc 100644
--- a/pod/perlsyn.pod
+++ b/pod/perlsyn.pod
@@ -118,7 +118,7 @@ as the last item in a statement.
 
 =head2 Statement Modifiers
 X<statement modifier> X<modifier> X<if> X<unless> X<while>
-X<until> X<whereso> X<foreach> X<for>
+X<until> X<whereis> X<whereso> X<foreach> X<for>
 
 Any simple statement may optionally be followed by a I<SINGLE> modifier,
 just before the terminating semicolon (or block ending).  The possible
@@ -130,6 +130,7 @@ modifiers are:
     until EXPR
     for LIST
     foreach LIST
+    whereis EXPR
     whereso EXPR
 
 The C<EXPR> following the modifier is referred to as the "condition".
@@ -211,12 +212,13 @@ it.  Future versions of perl might do something different from the
 version of perl you try it out on.  Here be dragons.
 X<my>
 
-The C<whereso> modifier is an experimental feature that first appeared
-with this spelling in Perl 5.28.
-To use it, you should include a C<use feature 'switch'>
-declaration, or a declaration that implies it.  It behaves like the full
-C<whereso> statement with block, described in L</"Switch Statements"> below.
-It executes the statement only if the I<EXPR> is true.  If the statement
+The C<whereis> and C<whereso> modifiers are an experimental feature
+that first appeared with this spelling in Perl 5.28.  To use them, you
+should include a C<use feature 'switch'> declaration, or a declaration
+that implies it.  They behave like the full C<whereis> or C<whereso>
+statement with block, described in L</"Switch Statements"> below.
+They executes the statement only if the I<EXPR> is true for C<whereso>,
+or C<$_> smartmatches the I<EXPR> for C<whereis>.  If the statement
 executes, control then implicitly jumps to the end of the dynamically
 enclosing loop (usually a C<given> block).
 
@@ -246,6 +248,7 @@ The following compound statements may be used to control flow:
 
     given (EXPR) BLOCK
 
+    whereis (EXPR) BLOCK
     whereso (EXPR) BLOCK
 
     LABEL while (EXPR) BLOCK
@@ -267,7 +270,7 @@ The following compound statements may be used to control flow:
 
     PHASE BLOCK
 
-The experimental C<given> and C<whereso> statements are I<not
+The experimental C<given>, C<whereis>, and C<whereso> statements are I<not
 automatically enabled>; see L</"Switch Statements"> below for how to do
 so, and the attendant caveats.
 
@@ -606,7 +609,7 @@ described immediately below remains experimental.
 
 =head2 Switch Statements
 
-X<switch> X<case> X<given> X<whereso>
+X<switch> X<case> X<given> X<whereis> X<whereso>
 
 C<given>, C<whereso>, and related keywords make up an experimental feature
 that first appeared in Perl 5.10, but behaved quite differently from
@@ -620,18 +623,19 @@ example:
 
     use v5.14;
 
-Under the "switch" feature, Perl gains the experimental keywords C<given>
-and C<whereso>.  Starting from Perl 5.16, one can
+Under the "switch" feature, Perl gains the experimental keywords C<given>,
+C<whereis>, and C<whereso>.  Starting from Perl 5.16, one can
 prefix the switch keywords with C<CORE::> to access the feature without
 a C<use feature> statement.
 
 The "switch" feature is considered highly experimental; it is subject
-to change with little notice.  Uses of the C<given> and C<whereso> keywords
-will by default warn about their experimental status.  Due to historical
-links between the two features, these warnings are in the same category
-as warnings about the C<~~> (smartmatch) operator being experimental.
+to change with little notice.  Uses of the C<given>, C<whereis>, and
+C<whereso> keywords will by default warn about their experimental status.
+These warnings are in the same category as warnings about the C<~~>
+(smartmatch) operator being experimental.
 
-The keywords C<given> and C<whereso> are analogous to C<switch> and C<case>
+The keywords C<given> and C<whereis> or C<whereso>
+are analogous to C<switch> and C<case>
 in C.  They're meant to be used together, but can actually be used
 independently and mixed with other kinds of compound statement.
 
@@ -649,6 +653,14 @@ following statement.  If the argument was true, it executes the block,
 then implicitly performs a C<next>, jumping to the end of the closest
 dynamically enclosing C<given> block or other kind of loop.
 
+C<whereis> evaluates its argument and uses it as a smartmatch object,
+checking whether C<$_> matches it.  If C<$_> did not match then it does
+not execute its block, and proceeds to the following statement.  If C<$_>
+did match, it executes the block, then implicitly performs a C<next>,
+jumping to the end of the closest dynamically enclosing C<given> block
+or other kind of loop.  This is exactly like C<whereso>, except for the
+implicit use of smartmatch.
+
 Putting this together, the code in the previous section could be
 rewritten as
 
@@ -671,7 +683,7 @@ less punctuation as
         $nothing = 1;
     }
 
-You can use the C<continue> keyword to exit a C<whereso>
+You can use the C<continue> keyword to exit a C<whereis> or C<whereso>
 block, proceeding to the following statement.  This is most commonly
 done last thing inside the block, to override the implicit C<next>.
 For example
@@ -695,7 +707,7 @@ An empty list as soon as an explicit C<next> or C<last> is encountered.
 =item *
 
 The value of the last evaluated expression of the successful
-C<whereso> clause, if there happens to be one.
+C<whereis> or C<whereso> clause, if there happens to be one.
 
 =item *
 
@@ -706,12 +718,13 @@ condition is true.
 
 In both last cases, the last expression is evaluated in the context that
 was applied to the C<given> block.
-Note that, unlike C<if> and C<unless>, failed C<whereso> statements always
+Note that, unlike C<if> and C<unless>,
+failed C<whereis>/C<whereso> statements always
 evaluate to an empty list.
 
-On versions of Perl preceding Perl 5.28, C<given> and C<whereso> behave
-quite differently from their present behaviour.  If your code needs to
-run on older versions, avoid C<given> and C<whereso>.
+On versions of Perl preceding Perl 5.28, C<given> and the related keywords
+behave quite differently from their present behaviour.  If your code needs
+to run on older versions, avoid C<given>, C<whereis>, and C<whereso>.
 
 =head2 Goto
 X<goto>
diff --git a/regen/keywords.pl b/regen/keywords.pl
index 6bebf7d..b794a6b 100755
--- a/regen/keywords.pl
+++ b/regen/keywords.pl
@@ -39,6 +39,7 @@ my %feature_kw = (
     state     => 'state',
     say       => 'say',
     given     => 'switch',
+    whereis   => 'switch',
     whereso   => 'switch',
     # continue is already a keyword
     evalbytes => 'evalbytes',
@@ -352,6 +353,7 @@ __END__
 -waitpid
 -wantarray
 -warn
++whereis
 +whereso
 +while
 -write
diff --git a/t/op/coreamp.t b/t/op/coreamp.t
index 52e2fd5..fa11bea 100644
--- a/t/op/coreamp.t
+++ b/t/op/coreamp.t
@@ -1156,7 +1156,8 @@ like $@, qr'^Undefined format "STDOUT" called',
                   e)|e(?:ls(?:if|e)|val|q)|g(?:[et]|iven|oto
                   |rep)|u(?:n(?:less|til)|se)|l(?:(?:as)?t|ocal|e)|re
                   (?:quire|turn|do)|__(?:DATA|END)__|for(?:each|mat)?|(?:
-                  AUTOLOA|EN)D|n(?:e(?:xt)?|o)|C(?:HECK|ORE)|wh(?:ile|ereso)
+                  AUTOLOA|EN)D|n(?:e(?:xt)?|o)|C(?:HECK|ORE)
+		  |wh(?:ile|ere(?:is|so))
                   |(?:ou?|t)r|m(?:ap|y)?|UNITCHECK|q[qrwx]?|x(?:or)?|DEST
                   ROY|BEGIN|INIT|and|cmp|if|y)\z/x;
       $tests ++;
diff --git a/t/op/coresubs.t b/t/op/coresubs.t
index 38c6bc4..6946496 100644
--- a/t/op/coresubs.t
+++ b/t/op/coresubs.t
@@ -20,7 +20,7 @@ my %unsupported = map +($_=>1), qw (
   format ge given goto grep gt if last le local lt m map my ne next
   no  or  our  package  print  printf  q  qq  qr  qw  qx  redo  require
   return s say sort state sub tr unless until use
-  whereso while x xor y
+  whereis whereso while x xor y
 );
 my %args_for = (
   dbmopen  => '%1,$2,$3',
diff --git a/t/op/cproto.t b/t/op/cproto.t
index c0951b9..11cd9ad 100644
--- a/t/op/cproto.t
+++ b/t/op/cproto.t
@@ -7,7 +7,7 @@ BEGIN {
     set_up_inc('../lib');
 }
 
-plan tests => 252;
+plan tests => 253;
 
 while (<DATA>) {
     chomp;
@@ -276,6 +276,7 @@ wait ()
 waitpid ($$)
 wantarray ()
 warn (@)
+whereis undef
 whereso undef
 while undef
 write (;*)
diff --git a/t/op/whereis.t b/t/op/whereis.t
new file mode 100644
index 0000000..522e7d8
--- /dev/null
+++ b/t/op/whereis.t
@@ -0,0 +1,78 @@
+#!./perl
+
+BEGIN {
+    chdir 't' if -d 't';
+    require './test.pl';
+    set_up_inc('../lib');
+}
+use strict;
+use warnings;
+no warnings qw(uninitialized experimental::smartmatch);
+
+plan tests => 19;
+
+foreach(3) {
+    CORE::whereis(qr/\A3\z/) {
+	pass "CORE::whereis without feature flag";
+    }
+}
+
+use feature 'switch';
+
+foreach(3) {
+    CORE::whereis(qr/\A3\z/) {
+	pass "CORE::whereis with feature flag";
+    }
+}
+
+foreach(3) {
+    whereis(qr/\A3\z/) {
+	pass "whereis with feature flag";
+    }
+}
+
+package MatchAbc { use overload "~~" => sub { $_[1] eq "abc" }, fallback => 1; }
+my $matchabc = bless({}, "MatchAbc");
+my $regexpabc = qr/\Aabc\z/;
+
+foreach("abc") {
+    my $x = "foo";
+    is($x, "foo", "whereis lexical scope not started yet");
+    whereis(my $x = $matchabc) {
+	is($x, $matchabc, "whereis lexical scope starts");
+    }
+    is($x, "foo", "whereis lexical scope ends");
+}
+
+foreach my $matcher (undef, 0, 1, [], {}, sub { 1 }) {
+    my $res = eval {
+	my $r;
+	foreach("abc") {
+	    whereis($matcher) {
+		$r = 1;
+	    }
+	    $r = 0;
+	}
+	$r;
+    };
+    like $@, qr/\ACannot smart match without a matcher object /;
+}
+
+foreach my $matcher ($matchabc, $regexpabc) {
+    foreach my $matchee (qw(abc xyz)) {
+	my $res = eval {
+	    my $r;
+	    foreach($matchee) {
+		whereis($matcher) {
+		    $r = 1;
+		}
+		$r = 0;
+	    }
+	    $r;
+	};
+	is $@, "";
+	is !!$res, $matchee eq "abc";
+    }
+}
+
+1;
diff --git a/toke.c b/toke.c
index fa72938..e36d8a1 100644
--- a/toke.c
+++ b/toke.c
@@ -8844,13 +8844,15 @@ Perl_yylex(pTHX)
 	case KEY_vec:
 	    LOP(OP_VEC,XTERM);
 
+	case KEY_whereis:
 	case KEY_whereso:
 	    if (!PL_lex_allbrackets && PL_lex_fakeeof >= LEX_FAKEEOF_NONEXPR)
 		return REPORT(0);
-	    pl_yylval.ival = CopLINE(PL_curcop);
+	    pl_yylval.ival = tmp == KEY_whereis;
+	    /* diag_listed_as: whereso is experimental */
             Perl_ck_warner_d(aTHX_
                 packWARN(WARN_EXPERIMENTAL__SMARTMATCH),
-                "whereso is experimental");
+                "%" UTF8f " is experimental", UTF8fARG(UTF, len, PL_tokenbuf));
 	    OPERATOR(WHERESO);
 
 	case KEY_while:
-- 
1.8.3.1