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Really update perldelta with some older changes that hadn't been included yet
[perl5.git] / op.h
CommitLineData
a0d0e21e 1/* op.h
79072805 2 *
1129b882
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3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
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5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
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9 */
10
11/*
12 * The fields of BASEOP are:
13 * op_next Pointer to next ppcode to execute after this one.
14 * (Top level pre-grafted op points to first op,
15 * but this is replaced when op is grafted in, when
16 * this op will point to the real next op, and the new
17 * parent takes over role of remembering starting op.)
18 * op_ppaddr Pointer to current ppcode's function.
19 * op_type The type of the operation.
2814eb74
PJ
20 * op_opt Whether or not the op has been optimised by the
21 * peephole optimiser.
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22 *
23 * See the comments in S_clear_yystack() for more
24 * details on the following three flags:
85594c31 25 *
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26 * op_latefree tell op_free() to clear this op (and free any kids)
27 * but not yet deallocate the struct. This means that
28 * the op may be safely op_free()d multiple times
29 * op_latefreed an op_latefree op has been op_free()d
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30 * op_attached this op (sub)tree has been attached to a CV
31 *
85594c31 32 * op_spare three spare bits!
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33 * op_flags Flags common to all operations. See OPf_* below.
34 * op_private Flags peculiar to a particular operation (BUT,
35 * by default, set to the number of children until
36 * the operation is privatized by a check routine,
37 * which may or may not check number of children).
38 */
1850c8f9 39#include "op_reg_common.h"
79072805 40
79072805 41#define OPCODE U16
79072805 42
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NC
43#ifdef PERL_MAD
44# define MADPROP_IN_BASEOP MADPROP* op_madprop;
45#else
46# define MADPROP_IN_BASEOP
47#endif
48
61a59f30 49typedef PERL_BITFIELD16 Optype;
0053d415 50
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DL
51#ifdef BASEOP_DEFINITION
52#define BASEOP BASEOP_DEFINITION
53#else
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54#define BASEOP \
55 OP* op_next; \
56 OP* op_sibling; \
16c91539 57 OP* (*op_ppaddr)(pTHX); \
598921a7 58 MADPROP_IN_BASEOP \
79072805 59 PADOFFSET op_targ; \
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60 PERL_BITFIELD16 op_type:9; \
61 PERL_BITFIELD16 op_opt:1; \
62 PERL_BITFIELD16 op_latefree:1; \
63 PERL_BITFIELD16 op_latefreed:1; \
64 PERL_BITFIELD16 op_attached:1; \
65 PERL_BITFIELD16 op_spare:3; \
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66 U8 op_flags; \
67 U8 op_private;
0f4eea8f 68#endif
79072805 69
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70/* If op_type:9 is changed to :10, also change PUSHEVAL in cop.h.
71 Also, if the type of op_type is ever changed (e.g. to PERL_BITFIELD32)
72 then all the other bit-fields before/after it should change their
73 types too to let VC pack them into the same 4 byte integer.*/
17347a51 74
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PP
75#define OP_GIMME(op,dfl) \
76 (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \
77 ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
78 ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \
79 dfl)
80
2f8edad0 81#define OP_GIMME_REVERSE(flags) ((flags) & G_WANT)
4f911530 82
954c1994 83/*
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84=head1 "Gimme" Values
85
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86=for apidoc Amn|U32|GIMME_V
87The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
91e74348 88C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
683d9ad1 89respectively. See L<perlcall> for a usage example.
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90
91=for apidoc Amn|U32|GIMME
92A backward-compatible version of C<GIMME_V> which can only return
93C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
94Deprecated. Use C<GIMME_V> instead.
95
96=cut
97*/
98
533c011a 99#define GIMME_V OP_GIMME(PL_op, block_gimme())
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100
101/* Public flags */
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102
103#define OPf_WANT 3 /* Mask for "want" bits: */
104#define OPf_WANT_VOID 1 /* Want nothing */
105#define OPf_WANT_SCALAR 2 /* Want single value */
106#define OPf_WANT_LIST 3 /* Want list of any length */
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107#define OPf_KIDS 4 /* There is a firstborn child. */
108#define OPf_PARENS 8 /* This operator was parenthesized. */
463ee0b2 109 /* (Or block needs explicit scope entry.) */
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110#define OPf_REF 16 /* Certified reference. */
111 /* (Return container, not containee). */
112#define OPf_MOD 32 /* Will modify (lvalue). */
113#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
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114#define OPf_SPECIAL 128 /* Do something weird for this op: */
115 /* On local LVAL, don't init local value. */
116 /* On OP_SORT, subroutine is inlined. */
117 /* On OP_NOT, inversion was implicit. */
a0d0e21e 118 /* On OP_LEAVE, don't restore curpm. */
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119 /* On truncate, we truncate filehandle */
120 /* On control verbs, we saw no label */
121 /* On flipflop, we saw ... instead of .. */
122 /* On UNOPs, saw bare parens, e.g. eof(). */
a0d0e21e 123 /* On OP_ENTERSUB || OP_NULL, saw a "do". */
afebc493 124 /* On OP_EXISTS, treat av as av, not avhv. */
f2ec2afd 125 /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
0ac6acae 126 /* On pushre, rx is used as part of split, e.g. split " " */
497711e7 127 /* On regcomp, "use re 'eval'" was in scope */
7c6fadd6 128 /* On OP_READLINE, was <$filehandle> */
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129 /* On RV2[ACGHS]V, don't create GV--in
130 defined()*/
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131 /* On OP_DBSTATE, indicates breakpoint
132 * (runtime property) */
6b514a0d 133 /* On OP_REQUIRE, was seen as CORE::require */
0d863452 134 /* On OP_ENTERWHEN, there's no condition */
0d863452 135 /* On OP_SMARTMATCH, an implicit smartmatch */
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136 /* On OP_ANONHASH and OP_ANONLIST, create a
137 reference to the new anon hash or array */
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138 /* On OP_HELEM and OP_HSLICE, localization will be followed
139 by assignment, so do not wipe the target if it is special
140 (e.g. a glob or a magic SV) */
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141 /* On OP_MATCH, OP_SUBST & OP_TRANS, the
142 operand of a logical or conditional
143 that was optimised away, so it should
144 not be bound via =~ */
6b7c6d95 145 /* On OP_CONST, from a constant CV */
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FC
146 /* On OP_GLOB, two meanings:
147 - Before ck_glob, called as CORE::glob
148 - After ck_glob, use Perl glob function
149 */
79072805 150
54310121 151/* old names; don't use in new code, but don't break them, either */
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152#define OPf_LIST OPf_WANT_LIST
153#define OPf_KNOW OPf_WANT
954c1994 154
54310121 155#define GIMME \
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156 (PL_op->op_flags & OPf_WANT \
157 ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
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158 ? G_ARRAY \
159 : G_SCALAR) \
160 : dowantarray())
54310121 161
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162/* Lower bits of op_private often carry the number of arguments, as
163 * set by newBINOP, newUNOP and ck_fun */
164
51a68671 165/* NOTE: OP_NEXTSTATE and OP_DBSTATE (i.e. COPs) carry lower
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166 * bits of PL_hints in op_private */
167
a0d0e21e 168/* Private for lvalues */
cd06dffe 169#define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */
a0d0e21e 170
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171/* Private for OPs with TARGLEX */
172 /* (lower bits may carry MAXARG) */
173#define OPpTARGET_MY 16 /* Target is PADMY. */
174
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175/* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */
176#define OPpREFCOUNTED 64 /* op_targ carries a refcount */
177
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178/* Private for OP_AASSIGN */
179#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
180
181/* Private for OP_SASSIGN */
182#define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
e26df76a 183#define OPpASSIGN_CV_TO_GV 128 /* Possible optimisation for constants. */
79072805 184
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185/* Private for OP_MATCH and OP_SUBST{,CONST} */
186#define OPpRUNTIME 64 /* Pattern coming in on the stack */
187
79072805 188/* Private for OP_TRANS */
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189#define OPpTRANS_FROM_UTF 1
190#define OPpTRANS_TO_UTF 2
383e7cdd 191#define OPpTRANS_IDENTICAL 4 /* right side is same as left */
4757a243 192#define OPpTRANS_SQUASH 8
59f00321 193 /* 16 is used for OPpTARGET_MY */
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194#define OPpTRANS_COMPLEMENT 32
195#define OPpTRANS_GROWS 64
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196#define OPpTRANS_DELETE 128
197#define OPpTRANS_ALL (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF|OPpTRANS_IDENTICAL|OPpTRANS_SQUASH|OPpTRANS_COMPLEMENT|OPpTRANS_GROWS|OPpTRANS_DELETE)
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198
199/* Private for OP_REPEAT */
a0d0e21e 200#define OPpREPEAT_DOLIST 64 /* List replication. */
79072805 201
cf2dc985 202/* Private for OP_RV2GV, OP_RV2SV, OP_AELEM, OP_HELEM, OP_PADSV */
314d4778 203#define OPpDEREF (32|64) /* autovivify: Want ref to something: */
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PP
204#define OPpDEREF_AV 32 /* Want ref to AV. */
205#define OPpDEREF_HV 64 /* Want ref to HV. */
206#define OPpDEREF_SV (32|64) /* Want ref to SV. */
777d9014 207
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208 /* OP_ENTERSUB only */
209#define OPpENTERSUB_DB 16 /* Debug subroutine. */
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210#define OPpENTERSUB_HASTARG 4 /* Called from OP tree. */
211#define OPpENTERSUB_INARGS 1 /* Lval used as arg to a sub. */
0e9700df 212/* used by OPpDEREF (32|64) */
1dafeec8 213/* used by HINT_STRICT_SUBS 2 */
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FC
214 /* Mask for OP_ENTERSUB flags, the absence of which must be propagated
215 in dynamic context */
216#define OPpENTERSUB_LVAL_MASK (OPpLVAL_INTRO|OPpENTERSUB_INARGS)
217
d4ddbae8 218 /* OP_RV2CV only */
68dc0745 219#define OPpENTERSUB_AMPER 8 /* Used & form to call. */
9675f7ac 220#define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */
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FC
221#define OPpMAY_RETURN_CONSTANT 1 /* If a constant sub, return the constant */
222
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223 /* OP_GV only */
224#define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */
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PP
225 /* OP_?ELEM only */
226#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
241416b8 227 /* OP_RV2?V, OP_GVSV, OP_ENTERITER only */
78f9721b 228#define OPpOUR_INTRO 16 /* Variable was in an our() */
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FC
229 /* OP_RV2[AGH]V, OP_PAD[AH]V, OP_[AH]ELEM, OP_[AH]SLICE OP_AV2ARYLEN,
230 OP_R?KEYS, OP_SUBSTR, OP_POS, OP_VEC */
78f9721b 231#define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */
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232
233 /* OP_SUBSTR only */
234#define OPpSUBSTR_REPL_FIRST 16 /* 1st arg is replacement string */
235
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236 /* OP_PADSV only */
237#define OPpPAD_STATE 16 /* is a "state" pad */
192587c2 238 /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */
79072805 239
e26df76a 240 /* OP_RV2GV only */
cb0d96b9 241#define OPpDONT_INIT_GV 4 /* Call gv_fetchpv with GV_NOINIT */
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NC
242/* (Therefore will return whatever is currently in the symbol table, not
243 guaranteed to be a PVGV) */
244
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245/* Private for OP_ENTERITER and OP_ITER */
246#define OPpITER_REVERSED 4 /* for (reverse ...) */
0d863452 247#define OPpITER_DEF 8 /* for $_ or for my $_ */
ef3e5ea9 248
79072805 249/* Private for OP_CONST */
468aa647 250#define OPpCONST_NOVER 2 /* no 6; */
e7fec78e 251#define OPpCONST_SHORTCIRCUIT 4 /* eg the constant 5 in (5 || foo) */
486ec47a 252#define OPpCONST_STRICT 8 /* bareword subject to strict 'subs' */
748a9306 253#define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
a0d0e21e 254#define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
599cee73 255#define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */
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256
257/* Private for OP_FLIP/FLOP */
a0d0e21e 258#define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
79072805 259
ed6116ce 260/* Private for OP_LIST */
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261#define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
262
5f05dabc 263/* Private for OP_DELETE */
54310121 264#define OPpSLICE 64 /* Operating on a list of keys */
7332a6c4 265/* Also OPpLVAL_INTRO (128) */
5f05dabc 266
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267/* Private for OP_EXISTS */
268#define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */
269
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JH
270/* Private for OP_SORT */
271#define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */
272#define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */
eb209983 273#define OPpSORT_REVERSE 4 /* Reversed sort */
fe1bc4cf 274#define OPpSORT_INPLACE 8 /* sort in-place; eg @a = sort @a */
eb209983 275#define OPpSORT_DESCEND 16 /* Descending sort */
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RH
276#define OPpSORT_QSORT 32 /* Use quicksort (not mergesort) */
277#define OPpSORT_STABLE 64 /* Use a stable algorithm */
278
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279/* Private for OP_REVERSE */
280#define OPpREVERSE_INPLACE 8 /* reverse in-place (@a = reverse @a) */
281
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282/* Private for OP_OPEN and OP_BACKTICK */
283#define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */
284#define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */
285#define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */
286#define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */
287
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288/* Private for OP_EXIT, HUSH also for OP_DIE */
289#define OPpHUSH_VMSISH 64 /* hush DCL exit msg vmsish mode*/
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290#define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/
291
0d863452 292/* Private for OP_FTXXX */
1af34c76 293#define OPpFT_ACCESS 2 /* use filetest 'access' */
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GG
294#define OPpFT_STACKED 4 /* stacked filetest, as "-f" in "-f -x $f" */
295#define OPpFT_STACKING 8 /* stacking filetest, as "-x" in "-f -x $f" */
1af34c76 296
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297/* Private for OP_(MAP|GREP)(WHILE|START) */
298#define OPpGREP_LEX 2 /* iterate over lexical $_ */
299
0d863452
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300/* Private for OP_ENTEREVAL */
301#define OPpEVAL_HAS_HH 2 /* Does it have a copy of %^H */
802a15e9 302#define OPpEVAL_UNICODE 4
7d789282
FC
303#define OPpEVAL_BYTES 8
304#define OPpEVAL_COPHH 16 /* Construct %^H from cop hints */
0d863452 305
84ed0108 306/* Private for OP_CALLER, OP_WANTARRAY and OP_RUNCV */
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FC
307#define OPpOFFBYONE 128 /* Treat caller(1) as caller(2) */
308
e664e0a4
FC
309/* Private for OP_COREARGS */
310/* These must not conflict with OPpDONT_INIT_GV. See pp.c:S_rv2gv. */
311#define OPpCOREARGS_DEREF1 1 /* Arg 1 is a handle constructor */
312#define OPpCOREARGS_DEREF2 2 /* Arg 2 is a handle constructor */
cb85b2db 313#define OPpCOREARGS_SCALARMOD 64 /* \$ rather than \[$@%*] */
0b19d81a 314#define OPpCOREARGS_PUSHMARK 128 /* Call pp_pushmark */
e664e0a4 315
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316struct op {
317 BASEOP
318};
319
320struct unop {
321 BASEOP
322 OP * op_first;
323};
324
325struct binop {
326 BASEOP
327 OP * op_first;
328 OP * op_last;
329};
330
331struct logop {
332 BASEOP
333 OP * op_first;
334 OP * op_other;
335};
336
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337struct listop {
338 BASEOP
339 OP * op_first;
340 OP * op_last;
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341};
342
343struct pmop {
344 BASEOP
345 OP * op_first;
346 OP * op_last;
1fcf4c12 347#ifdef USE_ITHREADS
fd1bc7eb 348 IV op_pmoffset;
1fcf4c12
AB
349#else
350 REGEXP * op_pmregexp; /* compiled expression */
351#endif
69bdead3 352 U32 op_pmflags;
29f2e912 353 union {
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NC
354 OP * op_pmreplroot; /* For OP_SUBST */
355#ifdef USE_ITHREADS
356 PADOFFSET op_pmtargetoff; /* For OP_PUSHRE */
357#else
358 GV * op_pmtargetgv;
359#endif
360 } op_pmreplrootu;
361 union {
29f2e912 362 OP * op_pmreplstart; /* Only used in OP_SUBST */
cb55de95 363#ifdef USE_ITHREADS
0eaf81c5
BF
364 struct {
365 char * op_pmstashpv; /* Only used in OP_MATCH, with PMf_ONCE set */
366 U32 op_pmstashflags; /* currently only SVf_UTF8 or 0 */
367 } op_pmstashthr;
cb55de95 368#else
29f2e912 369 HV * op_pmstash;
cb55de95 370#endif
29f2e912 371 } op_pmstashstartu;
79072805 372};
a0d0e21e 373
1fcf4c12 374#ifdef USE_ITHREADS
14a49a24
NC
375#define PM_GETRE(o) (SvTYPE(PL_regex_pad[(o)->op_pmoffset]) == SVt_REGEXP \
376 ? (REGEXP*)(PL_regex_pad[(o)->op_pmoffset]) : NULL)
ede1273d
NC
377/* The assignment is just to enforce type safety (or at least get a warning).
378 */
14a49a24
NC
379/* With first class regexps not via a reference one needs to assign
380 &PL_sv_undef under ithreads. (This would probably work unthreaded, but NULL
381 is cheaper. I guess we could allow NULL, but the check above would get
382 more complex, and we'd have an AV with (SV*)NULL in it, which feels bad */
383/* BEWARE - something that calls this macro passes (r) which has a side
384 effect. */
ede1273d 385#define PM_SETRE(o,r) STMT_START { \
b1bc3f34 386 REGEXP *const _pm_setre = (r); \
7948fc08 387 assert(_pm_setre); \
b1bc3f34 388 PL_regex_pad[(o)->op_pmoffset] = MUTABLE_SV(_pm_setre); \
ede1273d 389 } STMT_END
1fcf4c12 390#else
b9ed2502
AB
391#define PM_GETRE(o) ((o)->op_pmregexp)
392#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
1fcf4c12 393#endif
4825b64b 394
beae72ee
KW
395/* Leave some space, so future bit allocations can go either in the shared or
396 * unshared area without affecting binary compatibility */
df7a8460 397#define PMf_BASE_SHIFT (_RXf_PMf_SHIFT_NEXT+6)
f4a4cecb 398
ef07e810 399/* 'use re "taint"' in scope: taint $1 etc. if target tainted */
1ad4ec54 400#define PMf_RETAINT (1<<(PMf_BASE_SHIFT+0))
c737faaf 401
c0f1c194
KW
402/* match successfully only once per reset, with related flag RXf_USED in
403 * re->extflags holding state. This is used only for ?? matches, and only on
404 * OP_MATCH and OP_QR */
1ad4ec54 405#define PMf_ONCE (1<<(PMf_BASE_SHIFT+1))
1850c8f9
KW
406
407/* replacement contains variables */
1ad4ec54 408#define PMf_MAYBE_CONST (1<<(PMf_BASE_SHIFT+2))
1850c8f9
KW
409
410/* PMf_ONCE has matched successfully. Not used under threading. */
1ad4ec54 411#define PMf_USED (1<<(PMf_BASE_SHIFT+3))
1850c8f9
KW
412
413/* subst replacement is constant */
1ad4ec54 414#define PMf_CONST (1<<(PMf_BASE_SHIFT+4))
c737faaf 415
1850c8f9 416/* keep 1st runtime pattern forever */
1ad4ec54 417#define PMf_KEEP (1<<(PMf_BASE_SHIFT+5))
4da3eb8b 418
1ad4ec54 419#define PMf_GLOBAL (1<<(PMf_BASE_SHIFT+6)) /* pattern had a g modifier */
c737faaf 420
1850c8f9 421/* don't reset pos() if //g fails */
1ad4ec54 422#define PMf_CONTINUE (1<<(PMf_BASE_SHIFT+7))
1850c8f9
KW
423
424/* evaluating replacement as expr */
1ad4ec54 425#define PMf_EVAL (1<<(PMf_BASE_SHIFT+8))
c0f1c194
KW
426
427/* Return substituted string instead of modifying it. */
1ad4ec54 428#define PMf_NONDESTRUCT (1<<(PMf_BASE_SHIFT+9))
e357fc67 429
1ad4ec54 430#if PMf_BASE_SHIFT+9 > 31
32cdcf9d 431# error Too many PMf_ bits used. See above and regnodes.h for any spare in middle
1850c8f9 432#endif
79072805 433
cb55de95 434#ifdef USE_ITHREADS
05ec9bb3 435
29f2e912 436# define PmopSTASHPV(o) \
0eaf81c5 437 (((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstashthr.op_pmstashpv : NULL)
29f2e912
NC
438# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
439# define PmopSTASHPV_set(o,pv) ({ \
440 assert((o)->op_pmflags & PMf_ONCE); \
0eaf81c5 441 ((o)->op_pmstashstartu.op_pmstashthr.op_pmstashpv = savesharedpv(pv)); \
29f2e912
NC
442 })
443# else
444# define PmopSTASHPV_set(o,pv) \
0eaf81c5 445 ((o)->op_pmstashstartu.op_pmstashthr.op_pmstashpv = savesharedpv(pv))
29f2e912 446# endif
0eaf81c5
BF
447# define PmopSTASH_flags(o) ((o)->op_pmstashstartu.op_pmstashthr.op_pmstashflags)
448# define PmopSTASH_flags_set(o,flags) ((o)->op_pmstashstartu.op_pmstashthr.op_pmstashflags = flags)
449# define PmopSTASH(o) (PmopSTASHPV(o) \
450 ? gv_stashpv((o)->op_pmstashstartu.op_pmstashthr.op_pmstashpv, \
451 GV_ADD | PmopSTASH_flags(o)) : NULL)
452# define PmopSTASH_set(o,hv) (PmopSTASHPV_set(o, (hv) ? HvNAME_get(hv) : NULL), \
453 PmopSTASH_flags_set(o, \
454 ((hv) && HvNAME_HEK(hv) && \
455 HvNAMEUTF8(hv)) \
456 ? SVf_UTF8 \
457 : 0))
05ec9bb3
NIS
458# define PmopSTASH_free(o) PerlMemShared_free(PmopSTASHPV(o))
459
cb55de95 460#else
29f2e912
NC
461# define PmopSTASH(o) \
462 (((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstash : NULL)
463# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
464# define PmopSTASH_set(o,hv) ({ \
465 assert((o)->op_pmflags & PMf_ONCE); \
466 ((o)->op_pmstashstartu.op_pmstash = (hv)); \
467 })
468# else
469# define PmopSTASH_set(o,hv) ((o)->op_pmstashstartu.op_pmstash = (hv))
470# endif
bd61b366 471# define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME_get(PmopSTASH(o)) : NULL)
29f2e912 472 /* op_pmstashstartu.op_pmstash is not refcounted */
cb55de95 473# define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
c4bd3ae5
NC
474/* Note that if this becomes non-empty, then S_forget_pmop in op.c will need
475 changing */
05ec9bb3 476# define PmopSTASH_free(o)
cb55de95
JH
477#endif
478
79072805
LW
479struct svop {
480 BASEOP
481 SV * op_sv;
482};
483
7934575e 484struct padop {
79072805 485 BASEOP
7934575e 486 PADOFFSET op_padix;
79072805
LW
487};
488
489struct pvop {
490 BASEOP
491 char * op_pv;
492};
493
79072805
LW
494struct loop {
495 BASEOP
496 OP * op_first;
497 OP * op_last;
79072805
LW
498 OP * op_redoop;
499 OP * op_nextop;
500 OP * op_lastop;
501};
502
350de78d
GS
503#define cUNOPx(o) ((UNOP*)o)
504#define cBINOPx(o) ((BINOP*)o)
505#define cLISTOPx(o) ((LISTOP*)o)
506#define cLOGOPx(o) ((LOGOP*)o)
507#define cPMOPx(o) ((PMOP*)o)
508#define cSVOPx(o) ((SVOP*)o)
509#define cPADOPx(o) ((PADOP*)o)
510#define cPVOPx(o) ((PVOP*)o)
511#define cCOPx(o) ((COP*)o)
512#define cLOOPx(o) ((LOOP*)o)
513
514#define cUNOP cUNOPx(PL_op)
515#define cBINOP cBINOPx(PL_op)
516#define cLISTOP cLISTOPx(PL_op)
517#define cLOGOP cLOGOPx(PL_op)
518#define cPMOP cPMOPx(PL_op)
519#define cSVOP cSVOPx(PL_op)
520#define cPADOP cPADOPx(PL_op)
521#define cPVOP cPVOPx(PL_op)
522#define cCOP cCOPx(PL_op)
523#define cLOOP cLOOPx(PL_op)
524
525#define cUNOPo cUNOPx(o)
526#define cBINOPo cBINOPx(o)
527#define cLISTOPo cLISTOPx(o)
528#define cLOGOPo cLOGOPx(o)
529#define cPMOPo cPMOPx(o)
530#define cSVOPo cSVOPx(o)
531#define cPADOPo cPADOPx(o)
532#define cPVOPo cPVOPx(o)
533#define cCOPo cCOPx(o)
534#define cLOOPo cLOOPx(o)
535
536#define kUNOP cUNOPx(kid)
537#define kBINOP cBINOPx(kid)
538#define kLISTOP cLISTOPx(kid)
539#define kLOGOP cLOGOPx(kid)
540#define kPMOP cPMOPx(kid)
541#define kSVOP cSVOPx(kid)
542#define kPADOP cPADOPx(kid)
543#define kPVOP cPVOPx(kid)
544#define kCOP cCOPx(kid)
545#define kLOOP cLOOPx(kid)
546
547
548#ifdef USE_ITHREADS
dd2155a4 549# define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix))
cecf5685
NC
550# define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && isGV_with_GP(v) \
551 && GvIN_PAD(v))
7766f137
GS
552# define IS_PADCONST(v) (v && SvREADONLY(v))
553# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
dd2155a4 554 ? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
638eceb6 555# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
dd2155a4 556 ? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
350de78d 557#else
638eceb6 558# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
743e66e6 559# define IS_PADGV(v) FALSE
7766f137
GS
560# define IS_PADCONST(v) FALSE
561# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
638eceb6 562# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
350de78d 563#endif
79072805 564
638eceb6
GS
565#define cGVOP_gv cGVOPx_gv(PL_op)
566#define cGVOPo_gv cGVOPx_gv(o)
567#define kGVOP_gv cGVOPx_gv(kid)
568#define cSVOP_sv cSVOPx_sv(PL_op)
569#define cSVOPo_sv cSVOPx_sv(o)
570#define kSVOP_sv cSVOPx_sv(kid)
7766f137 571
bcabcc50
NC
572#ifndef PERL_CORE
573# define Nullop ((OP*)NULL)
574#endif
79072805 575
cee4176c 576/* Lowest byte of PL_opargs */
a0d0e21e
LW
577#define OA_MARK 1
578#define OA_FOLDCONST 2
579#define OA_RETSCALAR 4
580#define OA_TARGET 8
903fd87c 581#define OA_TARGLEX 16
a0d0e21e
LW
582#define OA_OTHERINT 32
583#define OA_DANGEROUS 64
584#define OA_DEFGV 128
585
db173bac 586/* The next 4 bits encode op class information */
903fd87c 587#define OCSHIFT 8
b162f9ea
IZ
588
589#define OA_CLASS_MASK (15 << OCSHIFT)
590
591#define OA_BASEOP (0 << OCSHIFT)
592#define OA_UNOP (1 << OCSHIFT)
593#define OA_BINOP (2 << OCSHIFT)
594#define OA_LOGOP (3 << OCSHIFT)
1a67a97c
SM
595#define OA_LISTOP (4 << OCSHIFT)
596#define OA_PMOP (5 << OCSHIFT)
597#define OA_SVOP (6 << OCSHIFT)
7934575e 598#define OA_PADOP (7 << OCSHIFT)
1a67a97c
SM
599#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
600#define OA_LOOP (9 << OCSHIFT)
601#define OA_COP (10 << OCSHIFT)
602#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
603#define OA_FILESTATOP (12 << OCSHIFT)
604#define OA_LOOPEXOP (13 << OCSHIFT)
b162f9ea 605
903fd87c 606#define OASHIFT 12
a0d0e21e 607
4369b173 608/* Remaining nybbles of PL_opargs */
a0d0e21e
LW
609#define OA_SCALAR 1
610#define OA_LIST 2
611#define OA_AVREF 3
612#define OA_HVREF 4
613#define OA_CVREF 5
614#define OA_FILEREF 6
615#define OA_SCALARREF 7
616#define OA_OPTIONAL 8
617
d3c72c2a
DM
618/* Op_REFCNT is a reference count at the head of each op tree: needed
619 * since the tree is shared between threads, and between cloned closure
620 * copies in the same thread. OP_REFCNT_LOCK/UNLOCK is used when modifying
621 * this count.
622 * The same mutex is used to protect the refcounts of the reg_trie_data
623 * and reg_ac_data structures, which are shared between duplicated
624 * regexes.
625 */
626
534825c4
GS
627#ifdef USE_ITHREADS
628# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
4026c95a
SH
629# ifdef PERL_CORE
630# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
631# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
632# else
633# define OP_REFCNT_LOCK op_refcnt_lock()
634# define OP_REFCNT_UNLOCK op_refcnt_unlock()
635# endif
534825c4 636# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
534825c4
GS
637#else
638# define OP_REFCNT_INIT NOOP
639# define OP_REFCNT_LOCK NOOP
640# define OP_REFCNT_UNLOCK NOOP
641# define OP_REFCNT_TERM NOOP
534825c4 642#endif
e4783991 643
282f25c9 644#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
fc97af9c
NC
645#ifdef PERL_DEBUG_READONLY_OPS
646# define OpREFCNT_inc(o) Perl_op_refcnt_inc(aTHX_ o)
647# define OpREFCNT_dec(o) Perl_op_refcnt_dec(aTHX_ o)
648#else
649# define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : NULL)
650# define OpREFCNT_dec(o) (--(o)->op_targ)
651#endif
282f25c9 652
e4783991 653/* flags used by Perl_load_module() */
ec6d81ab
RGS
654#define PERL_LOADMOD_DENY 0x1 /* no Module */
655#define PERL_LOADMOD_NOIMPORT 0x2 /* use Module () */
656#define PERL_LOADMOD_IMPORT_OPS 0x4 /* use Module (...) */
e5dd39fc 657
a0c21aa1 658#if defined(PERL_IN_PERLY_C) || defined(PERL_IN_OP_C)
e4c5ccf3 659#define ref(o, type) doref(o, type, TRUE)
a0c21aa1 660#endif
e4c5ccf3 661
5983a79d
BM
662/*
663=head1 Optree Manipulation Functions
664
665=for apidoc Am|OP*|LINKLIST|OP *o
666Given the root of an optree, link the tree in execution order using the
667C<op_next> pointers and return the first op executed. If this has
668already been done, it will not be redone, and C<< o->op_next >> will be
669returned. If C<< o->op_next >> is not already set, I<o> should be at
670least an C<UNOP>.
671
672=cut
673*/
674
675#define LINKLIST(o) ((o)->op_next ? (o)->op_next : op_linklist((OP*)o))
676
33f36c71
NC
677/* no longer used anywhere in core */
678#ifndef PERL_CORE
46471bde 679#define cv_ckproto(cv, gv, p) \
f717afa7 680 cv_ckproto_len_flags((cv), (gv), (p), (p) ? strlen(p) : 0, 0)
33f36c71
NC
681#endif
682
7d0905b9
NC
683#ifdef PERL_CORE
684# define my(o) my_attrs((o), NULL)
685#endif
686
e5dd39fc 687#ifdef USE_REENTRANT_API
10bc17b6 688#include "reentr.h"
e5dd39fc
AB
689#endif
690
c7e45529
AE
691#if defined(PL_OP_SLAB_ALLOC)
692#define NewOp(m,var,c,type) \
e91d68d5 693 (var = (type *) Perl_Slab_Alloc(aTHX_ c*sizeof(type)))
c7e45529 694#define NewOpSz(m,var,size) \
e91d68d5 695 (var = (OP *) Perl_Slab_Alloc(aTHX_ size))
c7e45529
AE
696#define FreeOp(p) Perl_Slab_Free(aTHX_ p)
697#else
04e62e51
NC
698#define NewOp(m, var, c, type) \
699 (var = (MEM_WRAP_CHECK_(c,type) \
700 (type*)PerlMemShared_calloc(c, sizeof(type))))
113b9ccf 701#define NewOpSz(m, var, size) \
04e62e51
NC
702 (var = (OP*)PerlMemShared_calloc(1, size))
703#define FreeOp(p) PerlMemShared_free(p)
c7e45529 704#endif
598921a7 705
1930840b 706struct block_hooks {
52db365a 707 U32 bhk_flags;
1930840b
BM
708 void (*bhk_start) (pTHX_ int full);
709 void (*bhk_pre_end) (pTHX_ OP **seq);
710 void (*bhk_post_end) (pTHX_ OP **seq);
52db365a 711 void (*bhk_eval) (pTHX_ OP *const saveop);
1930840b
BM
712};
713
fd85fad2
BM
714/*
715=head1 Compile-time scope hooks
716
3e4ddde5 717=for apidoc mx|U32|BhkFLAGS|BHK *hk
fd85fad2
BM
718Return the BHK's flags.
719
3e4ddde5 720=for apidoc mx|void *|BhkENTRY|BHK *hk|which
fd85fad2
BM
721Return an entry from the BHK structure. I<which> is a preprocessor token
722indicating which entry to return. If the appropriate flag is not set
723this will return NULL. The type of the return value depends on which
724entry you ask for.
725
3e4ddde5 726=for apidoc Amx|void|BhkENTRY_set|BHK *hk|which|void *ptr
fd85fad2
BM
727Set an entry in the BHK structure, and set the flags to indicate it is
728valid. I<which> is a preprocessing token indicating which entry to set.
729The type of I<ptr> depends on the entry.
730
3e4ddde5 731=for apidoc Amx|void|BhkDISABLE|BHK *hk|which
a3e07c87
BM
732Temporarily disable an entry in this BHK structure, by clearing the
733appropriate flag. I<which> is a preprocessor token indicating which
734entry to disable.
735
3e4ddde5 736=for apidoc Amx|void|BhkENABLE|BHK *hk|which
a3e07c87
BM
737Re-enable an entry in this BHK structure, by setting the appropriate
738flag. I<which> is a preprocessor token indicating which entry to enable.
739This will assert (under -DDEBUGGING) if the entry doesn't contain a valid
740pointer.
741
3e4ddde5 742=for apidoc mx|void|CALL_BLOCK_HOOKS|which|arg
fd85fad2
BM
743Call all the registered block hooks for type I<which>. I<which> is a
744preprocessing token; the type of I<arg> depends on I<which>.
745
746=cut
747*/
748
52db365a
BM
749#define BhkFLAGS(hk) ((hk)->bhk_flags)
750
a88d97bf
BM
751#define BHKf_bhk_start 0x01
752#define BHKf_bhk_pre_end 0x02
753#define BHKf_bhk_post_end 0x04
754#define BHKf_bhk_eval 0x08
52db365a
BM
755
756#define BhkENTRY(hk, which) \
a88d97bf 757 ((BhkFLAGS(hk) & BHKf_ ## which) ? ((hk)->which) : NULL)
52db365a 758
a3e07c87
BM
759#define BhkENABLE(hk, which) \
760 STMT_START { \
761 BhkFLAGS(hk) |= BHKf_ ## which; \
762 assert(BhkENTRY(hk, which)); \
763 } STMT_END
764
765#define BhkDISABLE(hk, which) \
766 STMT_START { \
767 BhkFLAGS(hk) &= ~(BHKf_ ## which); \
768 } STMT_END
769
52db365a
BM
770#define BhkENTRY_set(hk, which, ptr) \
771 STMT_START { \
a88d97bf 772 (hk)->which = ptr; \
a3e07c87 773 BhkENABLE(hk, which); \
52db365a
BM
774 } STMT_END
775
1930840b
BM
776#define CALL_BLOCK_HOOKS(which, arg) \
777 STMT_START { \
778 if (PL_blockhooks) { \
779 I32 i; \
780 for (i = av_len(PL_blockhooks); i >= 0; i--) { \
781 SV *sv = AvARRAY(PL_blockhooks)[i]; \
52db365a 782 BHK *hk; \
1930840b
BM
783 \
784 assert(SvIOK(sv)); \
785 if (SvUOK(sv)) \
52db365a 786 hk = INT2PTR(BHK *, SvUVX(sv)); \
1930840b 787 else \
52db365a 788 hk = INT2PTR(BHK *, SvIVX(sv)); \
1930840b 789 \
52db365a 790 if (BhkENTRY(hk, which)) \
16c91539 791 BhkENTRY(hk, which)(aTHX_ arg); \
1930840b
BM
792 } \
793 } \
794 } STMT_END
795
d9088386
Z
796/* flags for rv2cv_op_cv */
797
798#define RV2CVOPCV_MARK_EARLY 0x00000001
799#define RV2CVOPCV_RETURN_NAME_GV 0x00000002
800
d3d7d28f
FC
801#define op_lvalue(op,t) Perl_op_lvalue_flags(aTHX_ op,t,0)
802
f5d552b4
FC
803/* flags for op_lvalue_flags */
804
805#define OP_LVALUE_NO_CROAK 1
806
9733086d
BM
807/*
808=head1 Custom Operators
809
810=for apidoc Am|U32|XopFLAGS|XOP *xop
811Return the XOP's flags.
812
813=for apidoc Am||XopENTRY|XOP *xop|which
814Return a member of the XOP structure. I<which> is a cpp token indicating
815which entry to return. If the member is not set this will return a
816default value. The return type depends on I<which>.
817
818=for apidoc Am|void|XopENTRY_set|XOP *xop|which|value
819Set a member of the XOP structure. I<which> is a cpp token indicating
820which entry to set. See L<perlguts/"Custom Operators"> for details about
821the available members and how they are used.
822
823=for apidoc Am|void|XopDISABLE|XOP *xop|which
824Temporarily disable a member of the XOP, by clearing the appropriate flag.
825
826=for apidoc Am|void|XopENABLE|XOP *xop|which
827Reenable a member of the XOP which has been disabled.
828
829=cut
830*/
831
1830b3d9
BM
832struct custom_op {
833 U32 xop_flags;
834 const char *xop_name;
835 const char *xop_desc;
836 U32 xop_class;
837 void (*xop_peep)(pTHX_ OP *o, OP *oldop);
838};
839
840#define XopFLAGS(xop) ((xop)->xop_flags)
841
842#define XOPf_xop_name 0x01
843#define XOPf_xop_desc 0x02
844#define XOPf_xop_class 0x04
845#define XOPf_xop_peep 0x08
846
847#define XOPd_xop_name PL_op_name[OP_CUSTOM]
848#define XOPd_xop_desc PL_op_desc[OP_CUSTOM]
849#define XOPd_xop_class OA_BASEOP
850#define XOPd_xop_peep ((Perl_cpeep_t)0)
851
852#define XopENTRY_set(xop, which, to) \
853 STMT_START { \
854 (xop)->which = (to); \
855 (xop)->xop_flags |= XOPf_ ## which; \
856 } STMT_END
857
858#define XopENTRY(xop, which) \
859 ((XopFLAGS(xop) & XOPf_ ## which) ? (xop)->which : XOPd_ ## which)
860
861#define XopDISABLE(xop, which) ((xop)->xop_flags &= ~XOPf_ ## which)
862#define XopENABLE(xop, which) \
863 STMT_START { \
864 (xop)->xop_flags |= XOPf_ ## which; \
865 assert(XopENTRY(xop, which)); \
866 } STMT_END
867
9733086d
BM
868/*
869=head1 Optree Manipulation Functions
870
871=for apidoc Am|const char *|OP_NAME|OP *o
872Return the name of the provided OP. For core ops this looks up the name
873from the op_type; for custom ops from the op_ppaddr.
874
875=for apidoc Am|const char *|OP_DESC|OP *o
876Return a short description of the provided OP.
877
878=for apidoc Am|U32|OP_CLASS|OP *o
879Return the class of the provided OP: that is, which of the *OP
880structures it uses. For core ops this currently gets the information out
881of PL_opargs, which does not always accurately reflect the type used.
882For custom ops the type is returned from the registration, and it is up
883to the registree to ensure it is accurate. The value returned will be
884one of the OA_* constants from op.h.
885
886=cut
887*/
888
1830b3d9
BM
889#define OP_NAME(o) ((o)->op_type == OP_CUSTOM \
890 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_name) \
891 : PL_op_name[(o)->op_type])
892#define OP_DESC(o) ((o)->op_type == OP_CUSTOM \
893 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_desc) \
894 : PL_op_desc[(o)->op_type])
895#define OP_CLASS(o) ((o)->op_type == OP_CUSTOM \
896 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_class) \
897 : (PL_opargs[(o)->op_type] & OA_CLASS_MASK))
898
7bff8c33
NC
899#define newSUB(f, o, p, b) Perl_newATTRSUB(aTHX_ (f), (o), (p), NULL, (b))
900
598921a7
NC
901#ifdef PERL_MAD
902# define MAD_NULL 1
903# define MAD_PV 2
904# define MAD_OP 3
905# define MAD_SV 4
906
907struct madprop {
908 MADPROP* mad_next;
d503a9ba 909 void *mad_val;
598921a7
NC
910 U32 mad_vlen;
911/* short mad_count; */
912 char mad_key;
913 char mad_type;
914};
915
916struct token {
917 I32 tk_type;
918 YYSTYPE tk_lval;
919 MADPROP* tk_mad;
920};
921#endif
2d910ff8
RGS
922
923/*
2b3def87 924 * Values that can be held by mad_key :
2d910ff8
RGS
925 * ^ unfilled head spot
926 * , literal ,
927 * ; literal ; (blank if implicit ; at end of block)
928 * : literal : from ?: or attr list
929 * + unary +
930 * ? literal ? from ?:
931 * ( literal (
932 * ) literal )
933 * [ literal [
934 * ] literal ]
935 * { literal {
936 * } literal }
937 * @ literal @ sigil
938 * $ literal $ sigil
939 * * literal * sigil
940 * ! use is source filtered
941 * & & or sub
942 * # whitespace/comment following ; or }
943 * # $# sigil
944 * 1 1st ; from for(;;)
945 * 1 retired protasis
946 * 2 2nd ; from for(;;)
947 * 2 retired apodosis
948 * 3 C-style for list
949 * a sub or var attributes
950 * a non-method arrow operator
951 * A method arrow operator
952 * A use import args
953 * b format block
954 * B retired stub block
955 * C constant conditional op
956 * d declarator
957 * D do block
958 * e unreached "else" (see C)
959 * e expression producing E
960 * E tr/E/R/, /E/
961 * f folded constant op
962 * F peg op for format
63575281 963 * g op was forced to be a word
2d910ff8
RGS
964 * i if/unless modifier
965 * I if/elsif/unless statement
dde83331 966 * k local declarator
2d910ff8
RGS
967 * K retired kid op
968 * l last index of array ($#foo)
969 * L label
970 * m modifier on regex
2d910ff8
RGS
971 * n sub or format name
972 * o current operator/declarator name
973 * o else/continue
974 * O generic optimized op
975 * p peg to hold extra whitespace at statement level
976 * P peg op for package declaration
977 * q opening quote
978 * = quoted material
979 * Q closing quote
980 * Q optimized qw//
981 * r expression producing R
982 * R tr/E/R/ s/E/R/
2d910ff8
RGS
983 * s sub signature
984 * S use import stub (no import)
985 * S retired sort block
986 * t unreached "then" (see C)
987 * U use import op
988 * v private sv of for loop
989 * V use version
990 * w while/until modifier
991 * W while/for statement
992 * x optimized qw
993 * X random thing
994 * _ whitespace/comments preceding anything else
995 * ~ =~ operator
996 */
3f2908ec
NC
997
998/*
999 * Local variables:
1000 * c-indentation-style: bsd
1001 * c-basic-offset: 4
1002 * indent-tabs-mode: t
1003 * End:
1004 *
1005 * ex: set ts=8 sts=4 sw=4 noet:
1006 */