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+/* op.h
+ *
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Artistic License, as specified in the README file.
+ *
+ */
+
+/*
+ * The fields of BASEOP are:
+ * op_next Pointer to next ppcode to execute after this one.
+ * (Top level pre-grafted op points to first op,
+ * but this is replaced when op is grafted in, when
+ * this op will point to the real next op, and the new
+ * parent takes over role of remembering starting op.)
+ * op_ppaddr Pointer to current ppcode's function.
+ * op_type The type of the operation.
+ * op_opt Whether or not the op has been optimised by the
+ * peephole optimiser.
+ *
+ * See the comments in S_clear_yystack() for more
+ * details on the following three flags:
+ *
+ * op_latefree tell op_free() to clear this op (and free any kids)
+ * but not yet deallocate the struct. This means that
+ * the op may be safely op_free()d multiple times
+ * op_latefreed an op_latefree op has been op_free()d
+ * op_attached this op (sub)tree has been attached to a CV
+ *
+ * op_spare three spare bits!
+ * op_flags Flags common to all operations. See OPf_* below.
+ * op_private Flags peculiar to a particular operation (BUT,
+ * by default, set to the number of children until
+ * the operation is privatized by a check routine,
+ * which may or may not check number of children).
+ */
+
+#define OPCODE U16
+
+#ifdef PERL_MAD
+# define MADPROP_IN_BASEOP MADPROP* op_madprop;
+#else
+# define MADPROP_IN_BASEOP
+#endif
+
+typedef PERL_BITFIELD16 Optype;
+
+#ifdef BASEOP_DEFINITION
+#define BASEOP BASEOP_DEFINITION
+#else
+#define BASEOP \
+ OP* op_next; \
+ OP* op_sibling; \
+ OP* (CPERLscope(*op_ppaddr))(pTHX); \
+ MADPROP_IN_BASEOP \
+ PADOFFSET op_targ; \
+ PERL_BITFIELD16 op_type:9; \
+ PERL_BITFIELD16 op_opt:1; \
+ PERL_BITFIELD16 op_latefree:1; \
+ PERL_BITFIELD16 op_latefreed:1; \
+ PERL_BITFIELD16 op_attached:1; \
+ PERL_BITFIELD16 op_spare:3; \
+ U8 op_flags; \
+ U8 op_private;
+#endif
+
+/* If op_type:9 is changed to :10, also change PUSHEVAL in cop.h.
+ Also, if the type of op_type is ever changed (e.g. to PERL_BITFIELD32)
+ then all the other bit-fields before/after it should change their
+ types too to let VC pack them into the same 4 byte integer.*/
+
+#define OP_GIMME(op,dfl) \
+ (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \
+ ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
+ ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \
+ dfl)
+
+#define OP_GIMME_REVERSE(flags) ((flags) & G_WANT)
+
+/*
+=head1 "Gimme" Values
+
+=for apidoc Amn|U32|GIMME_V
+The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
+C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
+respectively.
+
+=for apidoc Amn|U32|GIMME
+A backward-compatible version of C<GIMME_V> which can only return
+C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
+Deprecated. Use C<GIMME_V> instead.
+
+=cut
+*/
+
+#define GIMME_V OP_GIMME(PL_op, block_gimme())
+
+/* Public flags */
+
+#define OPf_WANT 3 /* Mask for "want" bits: */
+#define OPf_WANT_VOID 1 /* Want nothing */
+#define OPf_WANT_SCALAR 2 /* Want single value */
+#define OPf_WANT_LIST 3 /* Want list of any length */
+#define OPf_KIDS 4 /* There is a firstborn child. */
+#define OPf_PARENS 8 /* This operator was parenthesized. */
+ /* (Or block needs explicit scope entry.) */
+#define OPf_REF 16 /* Certified reference. */
+ /* (Return container, not containee). */
+#define OPf_MOD 32 /* Will modify (lvalue). */
+#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
+#define OPf_SPECIAL 128 /* Do something weird for this op: */
+ /* On local LVAL, don't init local value. */
+ /* On OP_SORT, subroutine is inlined. */
+ /* On OP_NOT, inversion was implicit. */
+ /* On OP_LEAVE, don't restore curpm. */
+ /* On truncate, we truncate filehandle */
+ /* On control verbs, we saw no label */
+ /* On flipflop, we saw ... instead of .. */
+ /* On UNOPs, saw bare parens, e.g. eof(). */
+ /* On OP_ENTERSUB || OP_NULL, saw a "do". */
+ /* On OP_EXISTS, treat av as av, not avhv. */
+ /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
+ /* On OP_ENTERITER, loop var is per-thread */
+ /* On pushre, rx is used as part of split, e.g. split " " */
+ /* On regcomp, "use re 'eval'" was in scope */
+ /* On OP_READLINE, was <$filehandle> */
+ /* On RV2[ACGHS]V, don't create GV--in
+ defined()*/
+ /* On OP_DBSTATE, indicates breakpoint
+ * (runtime property) */
+ /* On OP_AELEMFAST, indiciates pad var */
+ /* On OP_REQUIRE, was seen as CORE::require */
+ /* On OP_ENTERWHEN, there's no condition */
+ /* On OP_BREAK, an implicit break */
+ /* On OP_SMARTMATCH, an implicit smartmatch */
+ /* On OP_ANONHASH and OP_ANONLIST, create a
+ reference to the new anon hash or array */
+ /* On OP_ENTER, store caller context */
+ /* On OP_HELEM and OP_HSLICE, localization will be followed
+ by assignment, so do not wipe the target if it is special
+ (e.g. a glob or a magic SV) */
+
+/* old names; don't use in new code, but don't break them, either */
+#define OPf_LIST OPf_WANT_LIST
+#define OPf_KNOW OPf_WANT
+
+#define GIMME \
+ (PL_op->op_flags & OPf_WANT \
+ ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
+ ? G_ARRAY \
+ : G_SCALAR) \
+ : dowantarray())
+
+/* NOTE: OP_NEXTSTATE, OP_DBSTATE, and OP_SETSTATE (i.e. COPs) carry lower
+ * bits of PL_hints in op_private */
+
+/* Private for lvalues */
+#define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */
+
+/* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */
+#define OPpREFCOUNTED 64 /* op_targ carries a refcount */
+
+/* Private for OP_AASSIGN */
+#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
+
+/* Private for OP_SASSIGN */
+#define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
+#define OPpASSIGN_CV_TO_GV 128 /* Possible optimisation for constants. */
+
+/* Private for OP_MATCH and OP_SUBST{,CONST} */
+#define OPpRUNTIME 64 /* Pattern coming in on the stack */
+
+/* Private for OP_TRANS */
+#define OPpTRANS_FROM_UTF 1
+#define OPpTRANS_TO_UTF 2
+#define OPpTRANS_IDENTICAL 4 /* right side is same as left */
+#define OPpTRANS_SQUASH 8
+ /* 16 is used for OPpTARGET_MY */
+#define OPpTRANS_COMPLEMENT 32
+#define OPpTRANS_GROWS 64
+#define OPpTRANS_DELETE 128
+#define OPpTRANS_ALL (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF|OPpTRANS_IDENTICAL|OPpTRANS_SQUASH|OPpTRANS_COMPLEMENT|OPpTRANS_GROWS|OPpTRANS_DELETE)
+
+/* Private for OP_REPEAT */
+#define OPpREPEAT_DOLIST 64 /* List replication. */
+
+/* Private for OP_RV2GV, OP_RV2SV, OP_AELEM, OP_HELEM, OP_PADSV */
+#define OPpDEREF (32|64) /* autovivify: Want ref to something: */
+#define OPpDEREF_AV 32 /* Want ref to AV. */
+#define OPpDEREF_HV 64 /* Want ref to HV. */
+#define OPpDEREF_SV (32|64) /* Want ref to SV. */
+ /* OP_ENTERSUB only */
+#define OPpENTERSUB_DB 16 /* Debug subroutine. */
+#define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */
+#define OPpENTERSUB_NOMOD 64 /* Immune to mod() for :attrlist. */
+ /* OP_ENTERSUB and OP_RV2CV only */
+#define OPpENTERSUB_AMPER 8 /* Used & form to call. */
+#define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */
+#define OPpENTERSUB_INARGS 4 /* Lval used as arg to a sub. */
+ /* OP_GV only */
+#define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */
+ /* OP_?ELEM only */
+#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
+ /* OP_RV2?V, OP_GVSV, OP_ENTERITER only */
+#define OPpOUR_INTRO 16 /* Variable was in an our() */
+ /* OP_RV2[AGH]V, OP_PAD[AH]V, OP_[AH]ELEM */
+#define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */
+ /* OP_PADSV only */
+#define OPpPAD_STATE 16 /* is a "state" pad */
+ /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */
+
+ /* OP_RV2GV only */
+#define OPpDONT_INIT_GV 4 /* Call gv_fetchpv with GV_NOINIT */
+/* (Therefore will return whatever is currently in the symbol table, not
+ guaranteed to be a PVGV) */
+
+ /* OP_RV2CV only */
+#define OPpMAY_RETURN_CONSTANT 1 /* If a constant sub, return the constant */
+
+/* Private for OPs with TARGLEX */
+ /* (lower bits may carry MAXARG) */
+#define OPpTARGET_MY 16 /* Target is PADMY. */
+
+/* Private for OP_ENTERITER and OP_ITER */
+#define OPpITER_REVERSED 4 /* for (reverse ...) */
+#define OPpITER_DEF 8 /* for $_ or for my $_ */
+
+/* Private for OP_CONST */
+#define OPpCONST_NOVER 2 /* no 6; */
+#define OPpCONST_SHORTCIRCUIT 4 /* eg the constant 5 in (5 || foo) */
+#define OPpCONST_STRICT 8 /* bearword subject to strict 'subs' */
+#define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
+#define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */
+#define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
+#define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */
+
+/* Private for OP_FLIP/FLOP */
+#define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
+
+/* Private for OP_LIST */
+#define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
+
+/* Private for OP_DELETE */
+#define OPpSLICE 64 /* Operating on a list of keys */
+/* Also OPpLVAL_INTRO (128) */
+
+/* Private for OP_EXISTS */
+#define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */
+
+/* Private for OP_SORT */
+#define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */
+#define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */
+#define OPpSORT_REVERSE 4 /* Reversed sort */
+#define OPpSORT_INPLACE 8 /* sort in-place; eg @a = sort @a */
+#define OPpSORT_DESCEND 16 /* Descending sort */
+#define OPpSORT_QSORT 32 /* Use quicksort (not mergesort) */
+#define OPpSORT_STABLE 64 /* Use a stable algorithm */
+
+/* Private for OP_REVERSE */
+#define OPpREVERSE_INPLACE 8 /* reverse in-place (@a = reverse @a) */
+
+/* Private for OP_OPEN and OP_BACKTICK */
+#define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */
+#define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */
+#define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */
+#define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */
+
+/* Private for OP_EXIT, HUSH also for OP_DIE */
+#define OPpHUSH_VMSISH 64 /* hush DCL exit msg vmsish mode*/
+#define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/
+
+/* Private for OP_FTXXX */
+#define OPpFT_ACCESS 2 /* use filetest 'access' */
+#define OPpFT_STACKED 4 /* stacked filetest, as in "-f -x $f" */
+
+/* Private for OP_(MAP|GREP)(WHILE|START) */
+#define OPpGREP_LEX 2 /* iterate over lexical $_ */
+
+/* Private for OP_ENTEREVAL */
+#define OPpEVAL_HAS_HH 2 /* Does it have a copy of %^H */
+
+struct op {
+ BASEOP
+};
+
+struct unop {
+ BASEOP
+ OP * op_first;
+};
+
+struct binop {
+ BASEOP
+ OP * op_first;
+ OP * op_last;
+};
+
+struct logop {
+ BASEOP
+ OP * op_first;
+ OP * op_other;
+};
+
+struct listop {
+ BASEOP
+ OP * op_first;
+ OP * op_last;
+};
+
+struct pmop {
+ BASEOP
+ OP * op_first;
+ OP * op_last;
+#ifdef USE_ITHREADS
+ IV op_pmoffset;
+#else
+ REGEXP * op_pmregexp; /* compiled expression */
+#endif
+ U32 op_pmflags;
+ union {
+ OP * op_pmreplroot; /* For OP_SUBST */
+#ifdef USE_ITHREADS
+ PADOFFSET op_pmtargetoff; /* For OP_PUSHRE */
+#else
+ GV * op_pmtargetgv;
+#endif
+ } op_pmreplrootu;
+ union {
+ OP * op_pmreplstart; /* Only used in OP_SUBST */
+#ifdef USE_ITHREADS
+ char * op_pmstashpv; /* Only used in OP_MATCH, with PMf_ONCE set */
+#else
+ HV * op_pmstash;
+#endif
+ } op_pmstashstartu;
+};
+
+#ifdef USE_ITHREADS
+#define PM_GETRE(o) (SvTYPE(PL_regex_pad[(o)->op_pmoffset]) == SVt_REGEXP \
+ ? (REGEXP*)(PL_regex_pad[(o)->op_pmoffset]) : NULL)
+/* The assignment is just to enforce type safety (or at least get a warning).
+ */
+/* With first class regexps not via a reference one needs to assign
+ &PL_sv_undef under ithreads. (This would probably work unthreaded, but NULL
+ is cheaper. I guess we could allow NULL, but the check above would get
+ more complex, and we'd have an AV with (SV*)NULL in it, which feels bad */
+/* BEWARE - something that calls this macro passes (r) which has a side
+ effect. */
+#define PM_SETRE(o,r) STMT_START { \
+ REGEXP *const _pm_setre = (r); \
+ assert(_pm_setre); \
+ PL_regex_pad[(o)->op_pmoffset] = MUTABLE_SV(_pm_setre); \
+ } STMT_END
+#else
+#define PM_GETRE(o) ((o)->op_pmregexp)
+#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
+#endif
+
+
+#define PMf_RETAINT 0x00000040 /* taint $1 etc. if target tainted */
+#define PMf_ONCE 0x00000080 /* match successfully only once per
+ reset, with related flag RXf_USED
+ in re->extflags holding state.
+ This is used only for ?? matches,
+ and only on OP_MATCH and OP_QR */
+
+#define PMf_UNUSED 0x00000100 /* free for use */
+#define PMf_MAYBE_CONST 0x00000200 /* replacement contains variables */
+
+#define PMf_USED 0x00000400 /* PMf_ONCE has matched successfully.
+ Not used under threading. */
+
+#define PMf_CONST 0x00000800 /* subst replacement is constant */
+#define PMf_KEEP 0x00001000 /* keep 1st runtime pattern forever */
+#define PMf_GLOBAL 0x00002000 /* pattern had a g modifier */
+#define PMf_CONTINUE 0x00004000 /* don't reset pos() if //g fails */
+#define PMf_EVAL 0x00008000 /* evaluating replacement as expr */
+
+/* The following flags have exact equivalents in regcomp.h with the prefix RXf_
+ * which are stored in the regexp->extflags member. If you change them here,
+ * you have to change them there, and vice versa.
+ */
+#define PMf_MULTILINE 0x00000001 /* assume multiple lines */
+#define PMf_SINGLELINE 0x00000002 /* assume single line */
+#define PMf_FOLD 0x00000004 /* case insensitivity */
+#define PMf_EXTENDED 0x00000008 /* chuck embedded whitespace */
+#define PMf_KEEPCOPY 0x00000010 /* copy the string when matching */
+#define PMf_LOCALE 0x00000020 /* use locale for character types */
+
+/* mask of bits that need to be transfered to re->extflags */
+#define PMf_COMPILETIME (PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED|PMf_KEEPCOPY)
+
+#ifdef USE_ITHREADS
+
+# define PmopSTASHPV(o) \
+ (((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstashpv : NULL)
+# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
+# define PmopSTASHPV_set(o,pv) ({ \
+ assert((o)->op_pmflags & PMf_ONCE); \
+ ((o)->op_pmstashstartu.op_pmstashpv = savesharedpv(pv)); \
+ })
+# else
+# define PmopSTASHPV_set(o,pv) \
+ ((o)->op_pmstashstartu.op_pmstashpv = savesharedpv(pv))
+# endif
+# define PmopSTASH(o) (PmopSTASHPV(o) \
+ ? gv_stashpv((o)->op_pmstashstartu.op_pmstashpv,GV_ADD) : NULL)
+# define PmopSTASH_set(o,hv) PmopSTASHPV_set(o, ((hv) ? HvNAME_get(hv) : NULL))
+# define PmopSTASH_free(o) PerlMemShared_free(PmopSTASHPV(o))
+
+#else
+# define PmopSTASH(o) \
+ (((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstash : NULL)
+# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
+# define PmopSTASH_set(o,hv) ({ \
+ assert((o)->op_pmflags & PMf_ONCE); \
+ ((o)->op_pmstashstartu.op_pmstash = (hv)); \
+ })
+# else
+# define PmopSTASH_set(o,hv) ((o)->op_pmstashstartu.op_pmstash = (hv))
+# endif
+# define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME_get(PmopSTASH(o)) : NULL)
+ /* op_pmstashstartu.op_pmstash is not refcounted */
+# define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
+/* Note that if this becomes non-empty, then S_forget_pmop in op.c will need
+ changing */
+# define PmopSTASH_free(o)
+#endif
+
+struct svop {
+ BASEOP
+ SV * op_sv;
+};
+
+struct padop {
+ BASEOP
+ PADOFFSET op_padix;
+};
+
+struct pvop {
+ BASEOP
+ char * op_pv;
+};
+
+struct loop {
+ BASEOP
+ OP * op_first;
+ OP * op_last;
+ OP * op_redoop;
+ OP * op_nextop;
+ OP * op_lastop;
+};
+
+#define cUNOPx(o) ((UNOP*)o)
+#define cBINOPx(o) ((BINOP*)o)
+#define cLISTOPx(o) ((LISTOP*)o)
+#define cLOGOPx(o) ((LOGOP*)o)
+#define cPMOPx(o) ((PMOP*)o)
+#define cSVOPx(o) ((SVOP*)o)
+#define cPADOPx(o) ((PADOP*)o)
+#define cPVOPx(o) ((PVOP*)o)
+#define cCOPx(o) ((COP*)o)
+#define cLOOPx(o) ((LOOP*)o)
+
+#define cUNOP cUNOPx(PL_op)
+#define cBINOP cBINOPx(PL_op)
+#define cLISTOP cLISTOPx(PL_op)
+#define cLOGOP cLOGOPx(PL_op)
+#define cPMOP cPMOPx(PL_op)
+#define cSVOP cSVOPx(PL_op)
+#define cPADOP cPADOPx(PL_op)
+#define cPVOP cPVOPx(PL_op)
+#define cCOP cCOPx(PL_op)
+#define cLOOP cLOOPx(PL_op)
+
+#define cUNOPo cUNOPx(o)
+#define cBINOPo cBINOPx(o)
+#define cLISTOPo cLISTOPx(o)
+#define cLOGOPo cLOGOPx(o)
+#define cPMOPo cPMOPx(o)
+#define cSVOPo cSVOPx(o)
+#define cPADOPo cPADOPx(o)
+#define cPVOPo cPVOPx(o)
+#define cCOPo cCOPx(o)
+#define cLOOPo cLOOPx(o)
+
+#define kUNOP cUNOPx(kid)
+#define kBINOP cBINOPx(kid)
+#define kLISTOP cLISTOPx(kid)
+#define kLOGOP cLOGOPx(kid)
+#define kPMOP cPMOPx(kid)
+#define kSVOP cSVOPx(kid)
+#define kPADOP cPADOPx(kid)
+#define kPVOP cPVOPx(kid)
+#define kCOP cCOPx(kid)
+#define kLOOP cLOOPx(kid)
+
+
+#ifdef USE_ITHREADS
+# define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix))
+# define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && isGV_with_GP(v) \
+ && GvIN_PAD(v))
+# define IS_PADCONST(v) (v && SvREADONLY(v))
+# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
+ ? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
+# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
+ ? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
+#else
+# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
+# define IS_PADGV(v) FALSE
+# define IS_PADCONST(v) FALSE
+# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
+# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
+#endif
+
+#define cGVOP_gv cGVOPx_gv(PL_op)
+#define cGVOPo_gv cGVOPx_gv(o)
+#define kGVOP_gv cGVOPx_gv(kid)
+#define cSVOP_sv cSVOPx_sv(PL_op)
+#define cSVOPo_sv cSVOPx_sv(o)
+#define kSVOP_sv cSVOPx_sv(kid)
+
+#ifndef PERL_CORE
+# define Nullop ((OP*)NULL)
+#endif
+
+/* Lowest byte-and-a-bit of PL_opargs */
+#define OA_MARK 1
+#define OA_FOLDCONST 2
+#define OA_RETSCALAR 4
+#define OA_TARGET 8
+#define OA_RETINTEGER 16
+#define OA_OTHERINT 32
+#define OA_DANGEROUS 64
+#define OA_DEFGV 128
+#define OA_TARGLEX 256
+
+/* The next 4 bits encode op class information */
+#define OCSHIFT 9
+
+#define OA_CLASS_MASK (15 << OCSHIFT)
+
+#define OA_BASEOP (0 << OCSHIFT)
+#define OA_UNOP (1 << OCSHIFT)
+#define OA_BINOP (2 << OCSHIFT)
+#define OA_LOGOP (3 << OCSHIFT)
+#define OA_LISTOP (4 << OCSHIFT)
+#define OA_PMOP (5 << OCSHIFT)
+#define OA_SVOP (6 << OCSHIFT)
+#define OA_PADOP (7 << OCSHIFT)
+#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
+#define OA_LOOP (9 << OCSHIFT)
+#define OA_COP (10 << OCSHIFT)
+#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
+#define OA_FILESTATOP (12 << OCSHIFT)
+#define OA_LOOPEXOP (13 << OCSHIFT)
+
+#define OASHIFT 13
+
+/* Remaining nybbles of PL_opargs */
+#define OA_SCALAR 1
+#define OA_LIST 2
+#define OA_AVREF 3
+#define OA_HVREF 4
+#define OA_CVREF 5
+#define OA_FILEREF 6
+#define OA_SCALARREF 7
+#define OA_OPTIONAL 8
+
+/* Op_REFCNT is a reference count at the head of each op tree: needed
+ * since the tree is shared between threads, and between cloned closure
+ * copies in the same thread. OP_REFCNT_LOCK/UNLOCK is used when modifying
+ * this count.
+ * The same mutex is used to protect the refcounts of the reg_trie_data
+ * and reg_ac_data structures, which are shared between duplicated
+ * regexes.
+ */
+
+#ifdef USE_ITHREADS
+# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
+# ifdef PERL_CORE
+# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
+# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
+# else
+# define OP_REFCNT_LOCK op_refcnt_lock()
+# define OP_REFCNT_UNLOCK op_refcnt_unlock()
+# endif
+# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
+#else
+# define OP_REFCNT_INIT NOOP
+# define OP_REFCNT_LOCK NOOP
+# define OP_REFCNT_UNLOCK NOOP
+# define OP_REFCNT_TERM NOOP
+#endif
+
+#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
+#ifdef PERL_DEBUG_READONLY_OPS
+# define OpREFCNT_inc(o) Perl_op_refcnt_inc(aTHX_ o)
+# define OpREFCNT_dec(o) Perl_op_refcnt_dec(aTHX_ o)
+#else
+# define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : NULL)
+# define OpREFCNT_dec(o) (--(o)->op_targ)
+#endif
+
+/* flags used by Perl_load_module() */
+#define PERL_LOADMOD_DENY 0x1 /* no Module */
+#define PERL_LOADMOD_NOIMPORT 0x2 /* use Module () */
+#define PERL_LOADMOD_IMPORT_OPS 0x4 /* use Module (...) */
+
+#if defined(PERL_IN_PERLY_C) || defined(PERL_IN_OP_C)
+#define ref(o, type) doref(o, type, TRUE)
+#endif
+
+/* no longer used anywhere in core */
+#ifndef PERL_CORE
+#define cv_ckproto(cv, gv, p) \
+ cv_ckproto_len((cv), (gv), (p), (p) ? strlen(p) : 0)
+#endif
+
+#ifdef PERL_CORE
+# define my(o) my_attrs((o), NULL)
+#endif
+
+#ifdef USE_REENTRANT_API
+#include "reentr.h"
+#endif
+
+#if defined(PL_OP_SLAB_ALLOC)
+#define NewOp(m,var,c,type) \
+ (var = (type *) Perl_Slab_Alloc(aTHX_ c*sizeof(type)))
+#define NewOpSz(m,var,size) \
+ (var = (OP *) Perl_Slab_Alloc(aTHX_ size))
+#define FreeOp(p) Perl_Slab_Free(aTHX_ p)
+#else
+#define NewOp(m, var, c, type) \
+ (var = (MEM_WRAP_CHECK_(c,type) \
+ (type*)PerlMemShared_calloc(c, sizeof(type))))
+#define NewOpSz(m, var, size) \
+ (var = (OP*)PerlMemShared_calloc(1, size))
+#define FreeOp(p) PerlMemShared_free(p)
+#endif
+
+#ifdef PERL_MAD
+# define MAD_NULL 1
+# define MAD_PV 2
+# define MAD_OP 3
+# define MAD_SV 4
+
+struct madprop {
+ MADPROP* mad_next;
+ void *mad_val;
+ U32 mad_vlen;
+/* short mad_count; */
+ char mad_key;
+ char mad_type;
+};
+
+struct token {
+ I32 tk_type;
+ YYSTYPE tk_lval;
+ MADPROP* tk_mad;
+};
+#endif
+
+/*
+ * Values that can be held by mad_key :
+ * ^ unfilled head spot
+ * , literal ,
+ * ; literal ; (blank if implicit ; at end of block)
+ * : literal : from ?: or attr list
+ * + unary +
+ * ? literal ? from ?:
+ * ( literal (
+ * ) literal )
+ * [ literal [
+ * ] literal ]
+ * { literal {
+ * } literal }
+ * @ literal @ sigil
+ * $ literal $ sigil
+ * * literal * sigil
+ * ! use is source filtered
+ * & & or sub
+ * # whitespace/comment following ; or }
+ * # $# sigil
+ * 1 1st ; from for(;;)
+ * 1 retired protasis
+ * 2 2nd ; from for(;;)
+ * 2 retired apodosis
+ * 3 C-style for list
+ * a sub or var attributes
+ * a non-method arrow operator
+ * A method arrow operator
+ * A use import args
+ * b format block
+ * B retired stub block
+ * C constant conditional op
+ * d declarator
+ * D do block
+ * e unreached "else" (see C)
+ * e expression producing E
+ * E tr/E/R/, /E/
+ * f folded constant op
+ * F peg op for format
+ * g op was forced to be a word
+ * i if/unless modifier
+ * I if/elsif/unless statement
+ * k local declarator
+ * K retired kid op
+ * l last index of array ($#foo)
+ * L label
+ * m modifier on regex
+ * n sub or format name
+ * o current operator/declarator name
+ * o else/continue
+ * O generic optimized op
+ * p peg to hold extra whitespace at statement level
+ * P peg op for package declaration
+ * q opening quote
+ * = quoted material
+ * Q closing quote
+ * Q optimized qw//
+ * r expression producing R
+ * R tr/E/R/ s/E/R/
+ * s sub signature
+ * S use import stub (no import)
+ * S retired sort block
+ * t unreached "then" (see C)
+ * U use import op
+ * v private sv of for loop
+ * V use version
+ * w while/until modifier
+ * W while/for statement
+ * x optimized qw
+ * X random thing
+ * _ whitespace/comments preceding anything else
+ * ~ =~ operator
+ */
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */