X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/a0d0e21ea6ea90a22318550944fe6cb09ae10cda..5152d7c70255adc94c2a3e2b618f1dda3b081e12:/op.c diff --git a/op.c b/op.c index d345575..d5f0bb6 100644 --- a/op.c +++ b/op.c @@ -1,6 +1,6 @@ /* op.c * - * Copyright (c) 1991-1994, Larry Wall + * Copyright (c) 1991-1997, Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. @@ -18,91 +18,141 @@ #include "EXTERN.h" #include "perl.h" -static I32 list_assignment _((OP *op)); -static OP *bad_type _((I32 n, char *t, OP *op, OP *kid)); -static OP *modkids _((OP *op, I32 type)); -static OP *no_fh_allowed _((OP *op)); -static OP *scalarboolean _((OP *op)); -static OP *too_few_arguments _((OP *op)); -static OP *too_many_arguments _((OP *op)); -static void null _((OP* op)); +#ifdef PERL_OBJECT +#define CHECKCALL this->*check +#else +#define CHECKCALL *check +#endif + +/* + * In the following definition, the ", Nullop" is just to make the compiler + * think the expression is of the right type: croak actually does a Siglongjmp. + */ +#define CHECKOP(type,o) \ + ((op_mask && op_mask[type]) \ + ? ( op_free((OP*)o), \ + croak("%s trapped by operation mask", op_desc[type]), \ + Nullop ) \ + : (CHECKCALL[type])((OP*)o)) + +static bool scalar_mod_type _((OP *o, I32 type)); +#ifndef PERL_OBJECT +static I32 list_assignment _((OP *o)); +static void bad_type _((I32 n, char *t, char *name, OP *kid)); +static OP *modkids _((OP *o, I32 type)); +static OP *no_fh_allowed _((OP *o)); +static OP *scalarboolean _((OP *o)); +static OP *too_few_arguments _((OP *o, char* name)); +static OP *too_many_arguments _((OP *o, char* name)); +static void null _((OP* o)); +static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq, + CV* startcv, I32 cx_ix)); +static OP *newDEFSVOP _((void)); +static OP *new_logop _((I32 type, I32 flags, OP **firstp, OP **otherp)); +#endif + +STATIC char* +gv_ename(GV *gv) +{ + SV* tmpsv = sv_newmortal(); + gv_efullname3(tmpsv, gv, Nullch); + return SvPV(tmpsv,na); +} -static OP * -no_fh_allowed(op) -OP *op; +STATIC OP * +no_fh_allowed(OP *o) { - sprintf(tokenbuf,"Missing comma after first argument to %s function", - op_name[op->op_type]); - yyerror(tokenbuf); - return op; + yyerror(form("Missing comma after first argument to %s function", + op_desc[o->op_type])); + return o; } -static OP * -too_few_arguments(op) -OP *op; +STATIC OP * +too_few_arguments(OP *o, char *name) { - sprintf(tokenbuf,"Not enough arguments for %s", op_name[op->op_type]); - yyerror(tokenbuf); - return op; + yyerror(form("Not enough arguments for %s", name)); + return o; } -static OP * -too_many_arguments(op) -OP *op; +STATIC OP * +too_many_arguments(OP *o, char *name) { - sprintf(tokenbuf,"Too many arguments for %s", op_name[op->op_type]); - yyerror(tokenbuf); - return op; + yyerror(form("Too many arguments for %s", name)); + return o; } -static OP * -bad_type(n, t, op, kid) -I32 n; -char *t; -OP *op; -OP *kid; +STATIC void +bad_type(I32 n, char *t, char *name, OP *kid) { - sprintf(tokenbuf, "Type of arg %d to %s must be %s (not %s)", - (int) n, op_name[op->op_type], t, op_name[kid->op_type]); - yyerror(tokenbuf); - return op; + yyerror(form("Type of arg %d to %s must be %s (not %s)", + (int)n, name, t, op_desc[kid->op_type])); } void -assertref(op) -OP *op; +assertref(OP *o) { - int type = op->op_type; + int type = o->op_type; if (type != OP_AELEM && type != OP_HELEM) { - sprintf(tokenbuf, "Can't use %s as left arg of implicit ->", - op_name[type]); - yyerror(tokenbuf); - if (type == OP_RV2HV || type == OP_ENTERSUB) - warn("(Did you mean $ instead of %c?)\n", - type == OP_RV2HV ? '%' : '&'); + yyerror(form("Can't use subscript on %s", op_desc[type])); + if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV) { + dTHR; + SV *msg = sv_2mortal( + newSVpvf("(Did you mean $ or @ instead of %c?)\n", + type == OP_ENTERSUB ? '&' : '%')); + if (in_eval & 2) + warn("%_", msg); + else if (in_eval) + sv_catsv(GvSV(errgv), msg); + else + PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg)); + } } } /* "register" allocation */ PADOFFSET -pad_allocmy(name) -char *name; +pad_allocmy(char *name) { + dTHR; PADOFFSET off; SV *sv; if (!(isALPHA(name[1]) || name[1] == '_' && (int)strlen(name) > 2)) { - if (!isprint(name[1])) - sprintf(name+1, "^%c", name[1] ^ 64); /* XXX is tokenbuf, really */ + if (!isPRINT(name[1])) { + name[3] = '\0'; + name[2] = toCTRL(name[1]); + name[1] = '^'; + } croak("Can't use global %s in \"my\"",name); } + if (dowarn && AvFILLp(comppad_name) >= 0) { + SV **svp = AvARRAY(comppad_name); + for (off = AvFILLp(comppad_name); off > comppad_name_floor; off--) { + if ((sv = svp[off]) + && sv != &sv_undef + && SvIVX(sv) == 999999999 /* var is in open scope */ + && strEQ(name, SvPVX(sv))) + { + warn("\"my\" variable %s masks earlier declaration in same scope", name); + break; + } + } + } off = pad_alloc(OP_PADSV, SVs_PADMY); sv = NEWSV(1102,0); sv_upgrade(sv, SVt_PVNV); sv_setpv(sv, name); + if (in_my_stash) { + if (*name != '$') + croak("Can't declare class for non-scalar %s in \"my\"",name); + SvOBJECT_on(sv); + (void)SvUPGRADE(sv, SVt_PVMG); + SvSTASH(sv) = (HV*)SvREFCNT_inc(in_my_stash); + sv_objcount++; + } av_store(comppad_name, off, sv); - SvNVX(sv) = (double)cop_seqmax; + SvNVX(sv) = (double)999999999; SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */ if (!min_intro_pending) min_intro_pending = off; @@ -115,30 +165,89 @@ char *name; return off; } -PADOFFSET -pad_findmy(name) -char *name; +STATIC PADOFFSET +pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix) { + dTHR; + CV *cv; I32 off; SV *sv; - SV **svp = AvARRAY(comppad_name); register I32 i; - register CONTEXT *cx; + register PERL_CONTEXT *cx; int saweval; - AV *curlist; - AV *curname; - CV *cv; - I32 seq = cop_seqmax; - /* The one we're looking for is probably just before comppad_name_fill. */ - for (off = comppad_name_fill; off > 0; off--) { - if ((sv = svp[off]) && - sv != &sv_undef && - seq <= SvIVX(sv) && - seq > (I32)SvNVX(sv) && - strEQ(SvPVX(sv), name)) - { - return (PADOFFSET)off; + for (cv = startcv; cv; cv = CvOUTSIDE(cv)) { + AV *curlist = CvPADLIST(cv); + SV **svp = av_fetch(curlist, 0, FALSE); + AV *curname; + + if (!svp || *svp == &sv_undef) + continue; + curname = (AV*)*svp; + svp = AvARRAY(curname); + for (off = AvFILLp(curname); off > 0; off--) { + if ((sv = svp[off]) && + sv != &sv_undef && + seq <= SvIVX(sv) && + seq > I_32(SvNVX(sv)) && + strEQ(SvPVX(sv), name)) + { + I32 depth; + AV *oldpad; + SV *oldsv; + + depth = CvDEPTH(cv); + if (!depth) { + if (newoff) { + if (SvFAKE(sv)) + continue; + return 0; /* don't clone from inactive stack frame */ + } + depth = 1; + } + oldpad = (AV*)*av_fetch(curlist, depth, FALSE); + oldsv = *av_fetch(oldpad, off, TRUE); + if (!newoff) { /* Not a mere clone operation. */ + SV *namesv = NEWSV(1103,0); + newoff = pad_alloc(OP_PADSV, SVs_PADMY); + sv_upgrade(namesv, SVt_PVNV); + sv_setpv(namesv, name); + av_store(comppad_name, newoff, namesv); + SvNVX(namesv) = (double)curcop->cop_seq; + SvIVX(namesv) = 999999999; /* A ref, intro immediately */ + SvFAKE_on(namesv); /* A ref, not a real var */ + if (CvANON(compcv) || SvTYPE(compcv) == SVt_PVFM) { + /* "It's closures all the way down." */ + CvCLONE_on(compcv); + if (cv == startcv) { + if (CvANON(compcv)) + oldsv = Nullsv; /* no need to keep ref */ + } + else { + CV *bcv; + for (bcv = startcv; + bcv && bcv != cv && !CvCLONE(bcv); + bcv = CvOUTSIDE(bcv)) { + if (CvANON(bcv)) + CvCLONE_on(bcv); + else { + if (dowarn && !CvUNIQUE(cv)) + warn( + "Variable \"%s\" may be unavailable", + name); + break; + } + } + } + } + else if (!CvUNIQUE(compcv)) { + if (dowarn && !SvFAKE(sv) && !CvUNIQUE(cv)) + warn("Variable \"%s\" will not stay shared", name); + } + } + av_store(comppad, newoff, SvREFCNT_inc(oldsv)); + return newoff; + } } } @@ -148,79 +257,92 @@ char *name; */ saweval = 0; - for (i = cxstack_ix; i >= 0; i--) { + for (i = cx_ix; i >= 0; i--) { cx = &cxstack[i]; switch (cx->cx_type) { default: + if (i == 0 && saweval) { + seq = cxstack[saweval].blk_oldcop->cop_seq; + return pad_findlex(name, newoff, seq, main_cv, 0); + } break; case CXt_EVAL: - saweval = i; + switch (cx->blk_eval.old_op_type) { + case OP_ENTEREVAL: + saweval = i; + break; + case OP_REQUIRE: + /* require must have its own scope */ + return 0; + } break; case CXt_SUB: if (!saweval) return 0; cv = cx->blk_sub.cv; - if (debstash && CvSTASH(cv) == debstash) /* ignore DB'* scope */ + if (debstash && CvSTASH(cv) == debstash) { /* ignore DB'* scope */ + saweval = i; /* so we know where we were called from */ continue; - seq = cxstack[saweval].blk_oldcop->cop_seq; - curlist = CvPADLIST(cv); - curname = (AV*)*av_fetch(curlist, 0, FALSE); - svp = AvARRAY(curname); - for (off = AvFILL(curname); off > 0; off--) { - if ((sv = svp[off]) && - sv != &sv_undef && - seq <= SvIVX(sv) && - seq > (I32)SvNVX(sv) && - strEQ(SvPVX(sv), name)) - { - PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY); - AV *oldpad = (AV*)*av_fetch(curlist, CvDEPTH(cv), FALSE); - SV *oldsv = *av_fetch(oldpad, off, TRUE); - SV *sv = NEWSV(1103,0); - sv_upgrade(sv, SVt_PVNV); - sv_setpv(sv, name); - av_store(comppad_name, newoff, sv); - SvNVX(sv) = (double)curcop->cop_seq; - SvIVX(sv) = 999999999; /* A ref, intro immediately */ - av_store(comppad, newoff, SvREFCNT_inc(oldsv)); - return newoff; - } } - return 0; + seq = cxstack[saweval].blk_oldcop->cop_seq; + return pad_findlex(name, newoff, seq, cv, i-1); } } - if (!saweval) - return 0; + return 0; +} + +PADOFFSET +pad_findmy(char *name) +{ + dTHR; + I32 off; + I32 pendoff = 0; + SV *sv; + SV **svp = AvARRAY(comppad_name); + U32 seq = cop_seqmax; + +#ifdef USE_THREADS + /* + * Special case to get lexical (and hence per-thread) @_. + * XXX I need to find out how to tell at parse-time whether use + * of @_ should refer to a lexical (from a sub) or defgv (global + * scope and maybe weird sub-ish things like formats). See + * startsub in perly.y. It's possible that @_ could be lexical + * (at least from subs) even in non-threaded perl. + */ + if (strEQ(name, "@_")) + return 0; /* success. (NOT_IN_PAD indicates failure) */ +#endif /* USE_THREADS */ - /* It's stupid to dup this code. main should be stored in a CV. */ - seq = cxstack[saweval].blk_oldcop->cop_seq; - svp = AvARRAY(padname); - for (off = AvFILL(padname); off > 0; off--) { + /* The one we're looking for is probably just before comppad_name_fill. */ + for (off = AvFILLp(comppad_name); off > 0; off--) { if ((sv = svp[off]) && sv != &sv_undef && - seq <= SvIVX(sv) && - seq > (I32)SvNVX(sv) && + (!SvIVX(sv) || + (seq <= SvIVX(sv) && + seq > I_32(SvNVX(sv)))) && strEQ(SvPVX(sv), name)) { - PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY); - SV *oldsv = *av_fetch(pad, off, TRUE); - SV *sv = NEWSV(1103,0); - sv_upgrade(sv, SVt_PVNV); - sv_setpv(sv, name); - av_store(comppad_name, newoff, sv); - SvNVX(sv) = (double)curcop->cop_seq; - SvIVX(sv) = 999999999; /* A ref, intro immediately */ - av_store(comppad, newoff, SvREFCNT_inc(oldsv)); - return newoff; + if (SvIVX(sv)) + return (PADOFFSET)off; + pendoff = off; /* this pending def. will override import */ } } - return 0; + + /* See if it's in a nested scope */ + off = pad_findlex(name, 0, seq, CvOUTSIDE(compcv), cxstack_ix); + if (off) { + /* If there is a pending local definition, this new alias must die */ + if (pendoff) + SvIVX(AvARRAY(comppad_name)[off]) = seq; + return off; /* pad_findlex returns 0 for failure...*/ + } + return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */ } void -pad_leavemy(fill) -I32 fill; +pad_leavemy(I32 fill) { I32 off; SV **svp = AvARRAY(comppad_name); @@ -232,17 +354,16 @@ I32 fill; } } /* "Deintroduce" my variables that are leaving with this scope. */ - for (off = AvFILL(comppad_name); off > fill; off--) { - if ((sv = svp[off]) && sv != &sv_undef) + for (off = AvFILLp(comppad_name); off > fill; off--) { + if ((sv = svp[off]) && sv != &sv_undef && SvIVX(sv) == 999999999) SvIVX(sv) = cop_seqmax; } } PADOFFSET -pad_alloc(optype,tmptype) -I32 optype; -U32 tmptype; +pad_alloc(I32 optype, U32 tmptype) { + dTHR; SV *sv; I32 retval; @@ -252,51 +373,75 @@ U32 tmptype; pad_reset(); if (tmptype & SVs_PADMY) { do { - sv = *av_fetch(comppad, AvFILL(comppad) + 1, TRUE); + sv = *av_fetch(comppad, AvFILLp(comppad) + 1, TRUE); } while (SvPADBUSY(sv)); /* need a fresh one */ - retval = AvFILL(comppad); + retval = AvFILLp(comppad); } else { - do { - sv = *av_fetch(comppad, ++padix, TRUE); - } while (SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)); + SV **names = AvARRAY(comppad_name); + SSize_t names_fill = AvFILLp(comppad_name); + for (;;) { + /* + * "foreach" index vars temporarily become aliases to non-"my" + * values. Thus we must skip, not just pad values that are + * marked as current pad values, but also those with names. + */ + if (++padix <= names_fill && + (sv = names[padix]) && sv != &sv_undef) + continue; + sv = *av_fetch(comppad, padix, TRUE); + if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY))) + break; + } retval = padix; } SvFLAGS(sv) |= tmptype; curpad = AvARRAY(comppad); - DEBUG_X(fprintf(stderr, "Pad alloc %ld for %s\n", (long) retval, op_name[optype])); +#ifdef USE_THREADS + DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n", + (unsigned long) thr, (unsigned long) curpad, + (long) retval, op_name[optype])); +#else + DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n", + (unsigned long) curpad, + (long) retval, op_name[optype])); +#endif /* USE_THREADS */ return (PADOFFSET)retval; } SV * -#ifndef CAN_PROTOTYPE -pad_sv(po) -PADOFFSET po; -#else pad_sv(PADOFFSET po) -#endif /* CAN_PROTOTYPE */ { + dTHR; +#ifdef USE_THREADS + DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n", + (unsigned long) thr, (unsigned long) curpad, po)); +#else if (!po) croak("panic: pad_sv po"); - DEBUG_X(fprintf(stderr, "Pad sv %d\n", po)); + DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n", + (unsigned long) curpad, po)); +#endif /* USE_THREADS */ return curpad[po]; /* eventually we'll turn this into a macro */ } void -#ifndef CAN_PROTOTYPE -pad_free(po) -PADOFFSET po; -#else pad_free(PADOFFSET po) -#endif /* CAN_PROTOTYPE */ { + dTHR; if (!curpad) return; if (AvARRAY(comppad) != curpad) croak("panic: pad_free curpad"); if (!po) croak("panic: pad_free po"); - DEBUG_X(fprintf(stderr, "Pad free %d\n", po)); +#ifdef USE_THREADS + DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n", + (unsigned long) thr, (unsigned long) curpad, po)); +#else + DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n", + (unsigned long) curpad, po)); +#endif /* USE_THREADS */ if (curpad[po] && curpad[po] != &sv_undef) SvPADTMP_off(curpad[po]); if ((I32)po < padix) @@ -304,18 +449,20 @@ pad_free(PADOFFSET po) } void -#ifndef CAN_PROTOTYPE -pad_swipe(po) -PADOFFSET po; -#else pad_swipe(PADOFFSET po) -#endif /* CAN_PROTOTYPE */ { + dTHR; if (AvARRAY(comppad) != curpad) croak("panic: pad_swipe curpad"); if (!po) croak("panic: pad_swipe po"); - DEBUG_X(fprintf(stderr, "Pad swipe %d\n", po)); +#ifdef USE_THREADS + DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n", + (unsigned long) thr, (unsigned long) curpad, po)); +#else + DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n", + (unsigned long) curpad, po)); +#endif /* USE_THREADS */ SvPADTMP_off(curpad[po]); curpad[po] = NEWSV(1107,0); SvPADTMP_on(curpad[po]); @@ -323,87 +470,173 @@ pad_swipe(PADOFFSET po) padix = po - 1; } +/* XXX pad_reset() is currently disabled because it results in serious bugs. + * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed + * on the stack by OPs that use them, there are several ways to get an alias + * to a shared TARG. Such an alias will change randomly and unpredictably. + * We avoid doing this until we can think of a Better Way. + * GSAR 97-10-29 */ void -pad_reset() +pad_reset(void) { +#ifdef USE_BROKEN_PAD_RESET + dTHR; register I32 po; if (AvARRAY(comppad) != curpad) croak("panic: pad_reset curpad"); - DEBUG_X(fprintf(stderr, "Pad reset\n")); - for (po = AvMAX(comppad); po > padix_floor; po--) { - if (curpad[po] && curpad[po] != &sv_undef) - SvPADTMP_off(curpad[po]); +#ifdef USE_THREADS + DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n", + (unsigned long) thr, (unsigned long) curpad)); +#else + DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n", + (unsigned long) curpad)); +#endif /* USE_THREADS */ + if (!tainting) { /* Can't mix tainted and non-tainted temporaries. */ + for (po = AvMAX(comppad); po > padix_floor; po--) { + if (curpad[po] && !SvIMMORTAL(curpad[po])) + SvPADTMP_off(curpad[po]); + } + padix = padix_floor; } - padix = padix_floor; +#endif pad_reset_pending = FALSE; } +#ifdef USE_THREADS +/* find_threadsv is not reentrant */ +PADOFFSET +find_threadsv(char *name) +{ + dTHR; + char *p; + PADOFFSET key; + SV **svp; + /* We currently only handle names of a single character */ + p = strchr(threadsv_names, *name); + if (!p) + return NOT_IN_PAD; + key = p - threadsv_names; + svp = av_fetch(thr->threadsv, key, FALSE); + if (!svp) { + SV *sv = NEWSV(0, 0); + av_store(thr->threadsv, key, sv); + thr->threadsvp = AvARRAY(thr->threadsv); + /* + * Some magic variables used to be automagically initialised + * in gv_fetchpv. Those which are now per-thread magicals get + * initialised here instead. + */ + switch (*name) { + case '_': + break; + case ';': + sv_setpv(sv, "\034"); + sv_magic(sv, 0, 0, name, 1); + break; + case '&': + case '`': + case '\'': + sawampersand = TRUE; + SvREADONLY_on(sv); + /* FALL THROUGH */ + + /* XXX %! tied to Errno.pm needs to be added here. + * See gv_fetchpv(). */ + /* case '!': */ + + default: + sv_magic(sv, 0, 0, name, 1); + } + DEBUG_L(PerlIO_printf(PerlIO_stderr(), + "find_threadsv: new SV %p for $%s%c\n", + sv, (*name < 32) ? "^" : "", + (*name < 32) ? toCTRL(*name) : *name)); + } + return key; +} +#endif /* USE_THREADS */ + /* Destructor */ void -op_free(op) -OP *op; +op_free(OP *o) { register OP *kid, *nextkid; - if (!op) + if (!o || o->op_seq == (U16)-1) return; - if (op->op_flags & OPf_KIDS) { - for (kid = cUNOP->op_first; kid; kid = nextkid) { + if (o->op_flags & OPf_KIDS) { + for (kid = cUNOPo->op_first; kid; kid = nextkid) { nextkid = kid->op_sibling; /* Get before next freeing kid */ op_free(kid); } } - - switch (op->op_type) { + switch (o->op_type) { case OP_NULL: - op->op_targ = 0; /* Was holding old type, if any. */ + o->op_targ = 0; /* Was holding old type, if any. */ break; case OP_ENTEREVAL: - op->op_targ = 0; /* Was holding hints. */ + o->op_targ = 0; /* Was holding hints. */ + break; +#ifdef USE_THREADS + case OP_THREADSV: + o->op_targ = 0; /* Was holding index into thr->threadsv AV. */ break; +#endif /* USE_THREADS */ + default: + if (!(o->op_flags & OPf_REF) + || (check[o->op_type] != FUNC_NAME_TO_PTR(ck_ftst))) + break; + /* FALL THROUGH */ case OP_GVSV: case OP_GV: - SvREFCNT_dec(cGVOP->op_gv); + case OP_AELEMFAST: + SvREFCNT_dec(cGVOPo->op_gv); break; case OP_NEXTSTATE: case OP_DBSTATE: - SvREFCNT_dec(cCOP->cop_filegv); + Safefree(cCOPo->cop_label); + SvREFCNT_dec(cCOPo->cop_filegv); break; case OP_CONST: - SvREFCNT_dec(cSVOP->op_sv); + SvREFCNT_dec(cSVOPo->op_sv); break; + case OP_GOTO: + case OP_NEXT: + case OP_LAST: + case OP_REDO: + if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS)) + break; + /* FALL THROUGH */ case OP_TRANS: - Safefree(cPVOP->op_pv); + Safefree(cPVOPo->op_pv); break; case OP_SUBST: - op_free(cPMOP->op_pmreplroot); + op_free(cPMOPo->op_pmreplroot); /* FALL THROUGH */ + case OP_PUSHRE: case OP_MATCH: - regfree(cPMOP->op_pmregexp); - break; - default: + ReREFCNT_dec(cPMOPo->op_pmregexp); break; } - if (op->op_targ > 0) - pad_free(op->op_targ); + if (o->op_targ > 0) + pad_free(o->op_targ); - Safefree(op); + Safefree(o); } -static void -null(op) -OP* op; +STATIC void +null(OP *o) { - if (op->op_type != OP_NULL && op->op_targ > 0) - pad_free(op->op_targ); - op->op_targ = op->op_type; - op->op_type = OP_NULL; - op->op_ppaddr = ppaddr[OP_NULL]; + if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0) + pad_free(o->op_targ); + o->op_targ = o->op_type; + o->op_type = OP_NULL; + o->op_ppaddr = ppaddr[OP_NULL]; } /* Contextualizers */ @@ -411,48 +644,46 @@ OP* op; #define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o)) OP * -linklist(op) -OP *op; +linklist(OP *o) { register OP *kid; - if (op->op_next) - return op->op_next; + if (o->op_next) + return o->op_next; /* establish postfix order */ - if (cUNOP->op_first) { - op->op_next = LINKLIST(cUNOP->op_first); - for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) { + if (cUNOPo->op_first) { + o->op_next = LINKLIST(cUNOPo->op_first); + for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) { if (kid->op_sibling) kid->op_next = LINKLIST(kid->op_sibling); else - kid->op_next = op; + kid->op_next = o; } } else - op->op_next = op; + o->op_next = o; - return op->op_next; + return o->op_next; } OP * -scalarkids(op) -OP *op; +scalarkids(OP *o) { OP *kid; - if (op && op->op_flags & OPf_KIDS) { - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) + if (o && o->op_flags & OPf_KIDS) { + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) scalar(kid); } - return op; + return o; } -static OP * -scalarboolean(op) -OP *op; +STATIC OP * +scalarboolean(OP *o) { if (dowarn && - op->op_type == OP_SASSIGN && cBINOP->op_first->op_type == OP_CONST) { + o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) { + dTHR; line_t oldline = curcop->cop_line; if (copline != NOLINE) @@ -460,34 +691,35 @@ OP *op; warn("Found = in conditional, should be =="); curcop->cop_line = oldline; } - return scalar(op); + return scalar(o); } OP * -scalar(op) -OP *op; +scalar(OP *o) { OP *kid; /* assumes no premature commitment */ - if (!op || (op->op_flags & OPf_KNOW) || error_count) - return op; + if (!o || (o->op_flags & OPf_WANT) || error_count + || o->op_type == OP_RETURN) + return o; - op->op_flags &= ~OPf_LIST; - op->op_flags |= OPf_KNOW; + o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR; - switch (op->op_type) { + switch (o->op_type) { case OP_REPEAT: - scalar(cBINOP->op_first); + if (o->op_private & OPpREPEAT_DOLIST) + null(((LISTOP*)cBINOPo->op_first)->op_first); + scalar(cBINOPo->op_first); break; case OP_OR: case OP_AND: case OP_COND_EXPR: - for (kid = cUNOP->op_first->op_sibling; kid; kid = kid->op_sibling) + for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) scalar(kid); break; case OP_SPLIT: - if ((kid = ((LISTOP*)op)->op_first) && kid->op_type == OP_PUSHRE) { + if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) { if (!kPMOP->op_pmreplroot) deprecate("implicit split to @_"); } @@ -496,48 +728,63 @@ OP *op; case OP_SUBST: case OP_NULL: default: - if (op->op_flags & OPf_KIDS) { - for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) + if (o->op_flags & OPf_KIDS) { + for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) scalar(kid); } break; - case OP_SCOPE: case OP_LEAVE: case OP_LEAVETRY: + kid = cLISTOPo->op_first; + scalar(kid); + while (kid = kid->op_sibling) { + if (kid->op_sibling) + scalarvoid(kid); + else + scalar(kid); + } + WITH_THR(curcop = &compiling); + break; + case OP_SCOPE: case OP_LINESEQ: case OP_LIST: - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) { + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) { if (kid->op_sibling) scalarvoid(kid); else scalar(kid); } - curcop = &compiling; + WITH_THR(curcop = &compiling); break; } - return op; + return o; } OP * -scalarvoid(op) -OP *op; +scalarvoid(OP *o) { OP *kid; char* useless = 0; SV* sv; - if (!op || error_count) - return op; - if (op->op_flags & OPf_LIST) - return op; + /* assumes no premature commitment */ + if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || error_count + || o->op_type == OP_RETURN) + return o; - op->op_flags |= OPf_KNOW; + o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID; - switch (op->op_type) { + switch (o->op_type) { default: - if (!(opargs[op->op_type] & OA_FOLDCONST)) + if (!(opargs[o->op_type] & OA_FOLDCONST)) + break; + /* FALL THROUGH */ + case OP_REPEAT: + if (o->op_flags & OPf_STACKED) break; - if (op->op_flags & OPf_STACKED) + goto func_ops; + case OP_SUBSTR: + if (o->op_private == 4) break; /* FALL THROUGH */ case OP_GVSV: @@ -548,7 +795,6 @@ OP *op; case OP_PADHV: case OP_PADANY: case OP_AV2ARYLEN: - case OP_SV2LEN: case OP_REF: case OP_REFGEN: case OP_SREFGEN: @@ -556,7 +802,6 @@ OP *op; case OP_HEX: case OP_OCT: case OP_LENGTH: - case OP_SUBSTR: case OP_VEC: case OP_INDEX: case OP_RINDEX: @@ -564,8 +809,6 @@ OP *op; case OP_AELEM: case OP_AELEMFAST: case OP_ASLICE: - case OP_VALUES: - case OP_KEYS: case OP_HELEM: case OP_HSLICE: case OP_UNPACK: @@ -611,26 +854,27 @@ OP *op; case OP_GGRNAM: case OP_GGRGID: case OP_GETLOGIN: - if (!(op->op_private & OPpLVAL_INTRO)) - useless = op_name[op->op_type]; + func_ops: + if (!(o->op_private & OPpLVAL_INTRO)) + useless = op_desc[o->op_type]; break; case OP_RV2GV: case OP_RV2SV: case OP_RV2AV: case OP_RV2HV: - if (!(op->op_private & OPpLVAL_INTRO) && - (!op->op_sibling || op->op_sibling->op_type != OP_READLINE)) + if (!(o->op_private & OPpLVAL_INTRO) && + (!o->op_sibling || o->op_sibling->op_type != OP_READLINE)) useless = "a variable"; break; case OP_NEXTSTATE: case OP_DBSTATE: - curcop = ((COP*)op); /* for warning above */ + WITH_THR(curcop = ((COP*)o)); /* for warning below */ break; case OP_CONST: - sv = cSVOP->op_sv; + sv = cSVOPo->op_sv; if (dowarn) { useless = "a constant"; if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0)) @@ -642,51 +886,57 @@ OP *op; useless = 0; } } - null(op); /* don't execute a constant */ + null(o); /* don't execute a constant */ SvREFCNT_dec(sv); /* don't even remember it */ break; case OP_POSTINC: - op->op_type = OP_PREINC; /* pre-increment is faster */ - op->op_ppaddr = ppaddr[OP_PREINC]; + o->op_type = OP_PREINC; /* pre-increment is faster */ + o->op_ppaddr = ppaddr[OP_PREINC]; break; case OP_POSTDEC: - op->op_type = OP_PREDEC; /* pre-decrement is faster */ - op->op_ppaddr = ppaddr[OP_PREDEC]; - break; - - case OP_REPEAT: - scalarvoid(cBINOP->op_first); - useless = op_name[op->op_type]; + o->op_type = OP_PREDEC; /* pre-decrement is faster */ + o->op_ppaddr = ppaddr[OP_PREDEC]; break; case OP_OR: case OP_AND: case OP_COND_EXPR: - for (kid = cUNOP->op_first->op_sibling; kid; kid = kid->op_sibling) + for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) scalarvoid(kid); break; + case OP_NULL: - if (op->op_flags & OPf_STACKED) + if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE) + WITH_THR(curcop = ((COP*)o)); /* for warning below */ + if (o->op_flags & OPf_STACKED) break; + /* FALL THROUGH */ case OP_ENTERTRY: case OP_ENTER: case OP_SCALAR: - if (!(op->op_flags & OPf_KIDS)) + if (!(o->op_flags & OPf_KIDS)) break; + /* FALL THROUGH */ case OP_SCOPE: case OP_LEAVE: case OP_LEAVETRY: case OP_LEAVELOOP: - op->op_private |= OPpLEAVE_VOID; case OP_LINESEQ: case OP_LIST: - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) scalarvoid(kid); break; + case OP_ENTEREVAL: + scalarkids(o); + break; + case OP_REQUIRE: + /* all requires must return a boolean value */ + o->op_flags &= ~OPf_WANT; + return scalar(o); case OP_SPLIT: - if ((kid = ((LISTOP*)op)->op_first) && kid->op_type == OP_PUSHRE) { + if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) { if (!kPMOP->op_pmreplroot) deprecate("implicit split to @_"); } @@ -694,131 +944,141 @@ OP *op; } if (useless && dowarn) warn("Useless use of %s in void context", useless); - return op; + return o; } OP * -listkids(op) -OP *op; +listkids(OP *o) { OP *kid; - if (op && op->op_flags & OPf_KIDS) { - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) + if (o && o->op_flags & OPf_KIDS) { + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) list(kid); } - return op; + return o; } OP * -list(op) -OP *op; +list(OP *o) { OP *kid; /* assumes no premature commitment */ - if (!op || (op->op_flags & OPf_KNOW) || error_count) - return op; + if (!o || (o->op_flags & OPf_WANT) || error_count + || o->op_type == OP_RETURN) + return o; - op->op_flags |= (OPf_KNOW | OPf_LIST); + o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST; - switch (op->op_type) { + switch (o->op_type) { case OP_FLOP: case OP_REPEAT: - list(cBINOP->op_first); + list(cBINOPo->op_first); break; case OP_OR: case OP_AND: case OP_COND_EXPR: - for (kid = cUNOP->op_first->op_sibling; kid; kid = kid->op_sibling) + for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) list(kid); break; default: case OP_MATCH: case OP_SUBST: case OP_NULL: - if (!(op->op_flags & OPf_KIDS)) + if (!(o->op_flags & OPf_KIDS)) break; - if (!op->op_next && cUNOP->op_first->op_type == OP_FLOP) { - list(cBINOP->op_first); - return gen_constant_list(op); + if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) { + list(cBINOPo->op_first); + return gen_constant_list(o); } case OP_LIST: - listkids(op); + listkids(o); break; - case OP_SCOPE: case OP_LEAVE: case OP_LEAVETRY: + kid = cLISTOPo->op_first; + list(kid); + while (kid = kid->op_sibling) { + if (kid->op_sibling) + scalarvoid(kid); + else + list(kid); + } + WITH_THR(curcop = &compiling); + break; + case OP_SCOPE: case OP_LINESEQ: - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) { + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) { if (kid->op_sibling) scalarvoid(kid); else list(kid); } - curcop = &compiling; + WITH_THR(curcop = &compiling); break; + case OP_REQUIRE: + /* all requires must return a boolean value */ + o->op_flags &= ~OPf_WANT; + return scalar(o); } - return op; + return o; } OP * -scalarseq(op) -OP *op; +scalarseq(OP *o) { OP *kid; - if (op) { - if (op->op_type == OP_LINESEQ || - op->op_type == OP_SCOPE || - op->op_type == OP_LEAVE || - op->op_type == OP_LEAVETRY) + if (o) { + if (o->op_type == OP_LINESEQ || + o->op_type == OP_SCOPE || + o->op_type == OP_LEAVE || + o->op_type == OP_LEAVETRY) { - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) { + dTHR; + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) { if (kid->op_sibling) { scalarvoid(kid); } } curcop = &compiling; } - op->op_flags &= ~OPf_PARENS; + o->op_flags &= ~OPf_PARENS; if (hints & HINT_BLOCK_SCOPE) - op->op_flags |= OPf_PARENS; + o->op_flags |= OPf_PARENS; } else - op = newOP(OP_STUB, 0); - return op; + o = newOP(OP_STUB, 0); + return o; } -static OP * -modkids(op, type) -OP *op; -I32 type; +STATIC OP * +modkids(OP *o, I32 type) { OP *kid; - if (op && op->op_flags & OPf_KIDS) { - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) + if (o && o->op_flags & OPf_KIDS) { + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) mod(kid, type); } - return op; + return o; } -static I32 modcount; - OP * -mod(op, type) -OP *op; -I32 type; +mod(OP *o, I32 type) { + dTHR; OP *kid; SV *sv; - char mtype; - if (!op || error_count) - return op; + if (!o || error_count) + return o; - switch (op->op_type) { + switch (o->op_type) { + case OP_UNDEF: + modcount++; + return o; case OP_CONST: - if (!(op->op_flags & (OPf_SPECIAL|OPf_MOD))) + if (!(o->op_private & (OPpCONST_ARYBASE))) goto nomod; if (eval_start && eval_start->op_type == OP_CONST) { compiling.cop_arybase = (I32)SvIV(((SVOP*)eval_start)->op_sv); @@ -826,19 +1086,24 @@ I32 type; } else if (!type) { SAVEI32(compiling.cop_arybase); + compiling.cop_arybase = 0; } else if (type == OP_REFGEN) goto nomod; else croak("That use of $[ is unsupported"); break; + case OP_STUB: + if (o->op_flags & OPf_PARENS) + break; + goto nomod; case OP_ENTERSUB: if ((type == OP_UNDEF || type == OP_REFGEN) && - !(op->op_flags & OPf_STACKED)) { - op->op_type = OP_RV2CV; /* entersub => rv2cv */ - op->op_ppaddr = ppaddr[OP_RV2CV]; - assert(cUNOP->op_first->op_type == OP_NULL); - null(((LISTOP*)cUNOP->op_first)->op_first); /* disable pushmark */ + !(o->op_flags & OPf_STACKED)) { + o->op_type = OP_RV2CV; /* entersub => rv2cv */ + o->op_ppaddr = ppaddr[OP_RV2CV]; + assert(cUNOPo->op_first->op_type == OP_NULL); + null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */ break; } /* FALL THROUGH */ @@ -847,11 +1112,10 @@ I32 type; /* grep, foreach, subcalls, refgen */ if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) break; - sprintf(tokenbuf, "Can't modify %s in %s", - op_name[op->op_type], - type ? op_name[type] : "local"); - yyerror(tokenbuf); - return op; + yyerror(form("Can't modify %s in %s", + op_desc[o->op_type], + type ? op_desc[type] : "local")); + return o; case OP_PREINC: case OP_PREDEC: @@ -873,23 +1137,30 @@ I32 type; case OP_I_MODULO: case OP_I_ADD: case OP_I_SUBTRACT: - if (!(op->op_flags & OPf_STACKED)) + if (!(o->op_flags & OPf_STACKED)) goto nomod; modcount++; break; case OP_COND_EXPR: - for (kid = cUNOP->op_first->op_sibling; kid; kid = kid->op_sibling) + for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) mod(kid, type); break; case OP_RV2AV: case OP_RV2HV: + if (!type && cUNOPo->op_first->op_type != OP_GV) + croak("Can't localize through a reference"); + if (type == OP_REFGEN && o->op_flags & OPf_PARENS) { + modcount = 10000; + return o; /* Treat \(@foo) like ordinary list. */ + } + /* FALL THROUGH */ case OP_RV2GV: - ref(cUNOP->op_first, op->op_type); + if (scalar_mod_type(o, type)) + goto nomod; + ref(cUNOPo->op_first, o->op_type); /* FALL THROUGH */ - case OP_PADAV: - case OP_PADHV: case OP_AASSIGN: case OP_ASLICE: case OP_HSLICE: @@ -900,150 +1171,225 @@ I32 type; modcount = 10000; break; case OP_RV2SV: - ref(cUNOP->op_first, op->op_type); + if (!type && cUNOPo->op_first->op_type != OP_GV) + croak("Can't localize through a reference"); + ref(cUNOPo->op_first, o->op_type); /* FALL THROUGH */ - case OP_PADSV: - case OP_UNDEF: case OP_GV: case OP_AV2ARYLEN: + hints |= HINT_BLOCK_SCOPE; case OP_SASSIGN: case OP_AELEMFAST: modcount++; break; - case OP_PUSHMARK: + case OP_PADAV: + case OP_PADHV: + modcount = 10000; + if (type == OP_REFGEN && o->op_flags & OPf_PARENS) + return o; /* Treat \(@foo) like ordinary list. */ + if (scalar_mod_type(o, type)) + goto nomod; + /* FALL THROUGH */ + case OP_PADSV: + modcount++; + if (!type) + croak("Can't localize lexical variable %s", + SvPV(*av_fetch(comppad_name, o->op_targ, 4), na)); + break; + +#ifdef USE_THREADS + case OP_THREADSV: + modcount++; /* XXX ??? */ break; +#endif /* USE_THREADS */ + case OP_PUSHMARK: + break; + case OP_KEYS: + if (type != OP_SASSIGN) + goto nomod; + goto lvalue_func; + case OP_SUBSTR: + if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */ + goto nomod; + /* FALL THROUGH */ case OP_POS: - mtype = '.'; - goto makelv; case OP_VEC: - mtype = 'v'; - goto makelv; - case OP_SUBSTR: - mtype = 'x'; - makelv: - pad_free(op->op_targ); - op->op_targ = pad_alloc(op->op_type, SVs_PADMY); - sv = PAD_SV(op->op_targ); - sv_upgrade(sv, SVt_PVLV); - sv_magic(sv, Nullsv, mtype, Nullch, 0); - curpad[op->op_targ] = sv; - if (op->op_flags & OPf_KIDS) - mod(cBINOP->op_first, type); + lvalue_func: + pad_free(o->op_targ); + o->op_targ = pad_alloc(o->op_type, SVs_PADMY); + assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL); + if (o->op_flags & OPf_KIDS) + mod(cBINOPo->op_first->op_sibling, type); break; case OP_AELEM: case OP_HELEM: - ref(cBINOP->op_first, op->op_type); + ref(cBINOPo->op_first, o->op_type); + if (type == OP_ENTERSUB && + !(o->op_private & (OPpLVAL_INTRO | OPpDEREF))) + o->op_private |= OPpLVAL_DEFER; modcount++; break; case OP_SCOPE: case OP_LEAVE: case OP_ENTER: - if (op->op_flags & OPf_KIDS) - mod(cLISTOP->op_last, type); + if (o->op_flags & OPf_KIDS) + mod(cLISTOPo->op_last, type); break; case OP_NULL: - if (!(op->op_flags & OPf_KIDS)) + if (!(o->op_flags & OPf_KIDS)) break; - if (op->op_targ != OP_LIST) { - mod(cBINOP->op_first, type); + if (o->op_targ != OP_LIST) { + mod(cBINOPo->op_first, type); break; } /* FALL THROUGH */ case OP_LIST: - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) mod(kid, type); break; } - op->op_flags |= OPf_MOD; + o->op_flags |= OPf_MOD; if (type == OP_AASSIGN || type == OP_SASSIGN) - op->op_flags |= OPf_SPECIAL|OPf_REF; + o->op_flags |= OPf_SPECIAL|OPf_REF; else if (!type) { - op->op_private |= OPpLVAL_INTRO; - op->op_flags &= ~OPf_SPECIAL; + o->op_private |= OPpLVAL_INTRO; + o->op_flags &= ~OPf_SPECIAL; + hints |= HINT_BLOCK_SCOPE; } else if (type != OP_GREPSTART && type != OP_ENTERSUB) - op->op_flags |= OPf_REF; - return op; + o->op_flags |= OPf_REF; + return o; +} + +static bool +scalar_mod_type(OP *o, I32 type) +{ + switch (type) { + case OP_SASSIGN: + if (o->op_type == OP_RV2GV) + return FALSE; + /* FALL THROUGH */ + case OP_PREINC: + case OP_PREDEC: + case OP_POSTINC: + case OP_POSTDEC: + case OP_I_PREINC: + case OP_I_PREDEC: + case OP_I_POSTINC: + case OP_I_POSTDEC: + case OP_POW: + case OP_MULTIPLY: + case OP_DIVIDE: + case OP_MODULO: + case OP_REPEAT: + case OP_ADD: + case OP_SUBTRACT: + case OP_I_MULTIPLY: + case OP_I_DIVIDE: + case OP_I_MODULO: + case OP_I_ADD: + case OP_I_SUBTRACT: + case OP_LEFT_SHIFT: + case OP_RIGHT_SHIFT: + case OP_BIT_AND: + case OP_BIT_XOR: + case OP_BIT_OR: + case OP_CONCAT: + case OP_SUBST: + case OP_TRANS: + case OP_ANDASSIGN: /* may work later */ + case OP_ORASSIGN: /* may work later */ + return TRUE; + default: + return FALSE; + } } OP * -refkids(op, type) -OP *op; -I32 type; +refkids(OP *o, I32 type) { OP *kid; - if (op && op->op_flags & OPf_KIDS) { - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) + if (o && o->op_flags & OPf_KIDS) { + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) ref(kid, type); } - return op; + return o; } OP * -ref(op, type) -OP *op; -I32 type; +ref(OP *o, I32 type) { OP *kid; - if (!op || error_count) - return op; + if (!o || error_count) + return o; - switch (op->op_type) { + switch (o->op_type) { case OP_ENTERSUB: - if ((type == OP_DEFINED) && - !(op->op_flags & OPf_STACKED)) { - op->op_type = OP_RV2CV; /* entersub => rv2cv */ - op->op_ppaddr = ppaddr[OP_RV2CV]; - assert(cUNOP->op_first->op_type == OP_NULL); - null(((LISTOP*)cUNOP->op_first)->op_first); /* disable pushmark */ + if ((type == OP_DEFINED || type == OP_LOCK) && + !(o->op_flags & OPf_STACKED)) { + o->op_type = OP_RV2CV; /* entersub => rv2cv */ + o->op_ppaddr = ppaddr[OP_RV2CV]; + assert(cUNOPo->op_first->op_type == OP_NULL); + null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */ + o->op_flags |= OPf_SPECIAL; } break; - + case OP_COND_EXPR: - for (kid = cUNOP->op_first->op_sibling; kid; kid = kid->op_sibling) + for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) ref(kid, type); break; case OP_RV2SV: - ref(cUNOP->op_first, op->op_type); - if (type == OP_RV2AV || type == OP_RV2HV) { - op->op_private |= (type == OP_RV2AV ? OPpDEREF_AV : OPpDEREF_HV); - op->op_flags |= OPf_MOD; + ref(cUNOPo->op_first, o->op_type); + /* FALL THROUGH */ + case OP_PADSV: + if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) { + o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV + : type == OP_RV2HV ? OPpDEREF_HV + : OPpDEREF_SV); + o->op_flags |= OPf_MOD; } break; + case OP_THREADSV: + o->op_flags |= OPf_MOD; /* XXX ??? */ + break; + case OP_RV2AV: case OP_RV2HV: - op->op_flags |= OPf_REF; + o->op_flags |= OPf_REF; /* FALL THROUGH */ case OP_RV2GV: - ref(cUNOP->op_first, op->op_type); + ref(cUNOPo->op_first, o->op_type); break; case OP_PADAV: case OP_PADHV: - op->op_flags |= OPf_REF; + o->op_flags |= OPf_REF; break; - + case OP_SCALAR: case OP_NULL: - if (!(op->op_flags & OPf_KIDS)) + if (!(o->op_flags & OPf_KIDS)) break; - ref(cBINOP->op_first, type); + ref(cBINOPo->op_first, type); break; case OP_AELEM: case OP_HELEM: - ref(cBINOP->op_first, op->op_type); - if (type == OP_RV2AV || type == OP_RV2HV) { - op->op_private |= (type == OP_RV2AV ? OPpDEREF_AV : OPpDEREF_HV); - op->op_flags |= OPf_MOD; + ref(cBINOPo->op_first, o->op_type); + if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) { + o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV + : type == OP_RV2HV ? OPpDEREF_HV + : OPpDEREF_SV); + o->op_flags |= OPf_MOD; } break; @@ -1051,49 +1397,47 @@ I32 type; case OP_LEAVE: case OP_ENTER: case OP_LIST: - if (!(op->op_flags & OPf_KIDS)) + if (!(o->op_flags & OPf_KIDS)) break; - ref(cLISTOP->op_last, type); + ref(cLISTOPo->op_last, type); break; default: break; } - return scalar(op); + return scalar(o); } OP * -my(op) -OP *op; +my(OP *o) { OP *kid; I32 type; - if (!op || error_count) - return op; + if (!o || error_count) + return o; - type = op->op_type; + type = o->op_type; if (type == OP_LIST) { - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) my(kid); - } - else if (type != OP_PADSV && + } else if (type == OP_UNDEF) { + return o; + } else if (type != OP_PADSV && type != OP_PADAV && type != OP_PADHV && type != OP_PUSHMARK) { - sprintf(tokenbuf, "Can't declare %s in my", op_name[op->op_type]); - yyerror(tokenbuf); - return op; + yyerror(form("Can't declare %s in my", op_desc[o->op_type])); + return o; } - op->op_flags |= OPf_MOD; - op->op_private |= OPpLVAL_INTRO; - return op; + o->op_flags |= OPf_MOD; + o->op_private |= OPpLVAL_INTRO; + return o; } OP * -sawparens(o) -OP *o; +sawparens(OP *o) { if (o) o->op_flags |= OPf_PARENS; @@ -1101,12 +1445,23 @@ OP *o; } OP * -bind_match(type, left, right) -I32 type; -OP *left; -OP *right; +bind_match(I32 type, OP *left, OP *right) { - OP *op; + OP *o; + + if (dowarn && + (left->op_type == OP_RV2AV || + left->op_type == OP_RV2HV || + left->op_type == OP_PADAV || + left->op_type == OP_PADHV)) { + char *desc = op_desc[(right->op_type == OP_SUBST || + right->op_type == OP_TRANS) + ? right->op_type : OP_MATCH]; + char *sample = ((left->op_type == OP_RV2AV || + left->op_type == OP_PADAV) + ? "@array" : "%hash"); + warn("Applying %s to %s will act on scalar(%s)", desc, sample, sample); + } if (right->op_type == OP_MATCH || right->op_type == OP_SUBST || @@ -1115,12 +1470,12 @@ OP *right; if (right->op_type != OP_MATCH) left = mod(left, right->op_type); if (right->op_type == OP_TRANS) - op = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right); + o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right); else - op = prepend_elem(right->op_type, scalar(left), right); + o = prepend_elem(right->op_type, scalar(left), right); if (type == OP_NOT) - return newUNOP(OP_NOT, 0, scalar(op)); - return op; + return newUNOP(OP_NOT, 0, scalar(o)); + return o; } else return bind_match(type, left, @@ -1128,21 +1483,19 @@ OP *right; } OP * -invert(op) -OP *op; +invert(OP *o) { - if (!op) - return op; + if (!o) + return o; /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */ - return newUNOP(OP_NOT, OPf_SPECIAL, scalar(op)); + return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o)); } OP * -scope(o) -OP *o; +scope(OP *o) { if (o) { - if (o->op_flags & OPf_PARENS || perldb) { + if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || tainting) { o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o); o->op_type = OP_LEAVE; o->op_ppaddr = ppaddr[OP_LEAVE]; @@ -1153,83 +1506,119 @@ OP *o; o->op_type = OP_SCOPE; o->op_ppaddr = ppaddr[OP_SCOPE]; kid = ((LISTOP*)o)->op_first; - if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) + if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){ + SvREFCNT_dec(((COP*)kid)->cop_filegv); null(kid); + } } else - o = newUNOP(OP_SCOPE, 0, o); + o = newLISTOP(OP_SCOPE, 0, o, Nullop); } } return o; } +void +save_hints(void) +{ + SAVEI32(hints); + SAVESPTR(GvHV(hintgv)); + GvHV(hintgv) = newHVhv(GvHV(hintgv)); + SAVEFREESV(GvHV(hintgv)); +} + int -block_start() +block_start(int full) { + dTHR; int retval = savestack_ix; - comppad_name_fill = AvFILL(comppad_name); - SAVEINT(min_intro_pending); - SAVEINT(max_intro_pending); + + SAVEI32(comppad_name_floor); + if (full) { + if ((comppad_name_fill = AvFILLp(comppad_name)) > 0) + comppad_name_floor = comppad_name_fill; + else + comppad_name_floor = 0; + } + SAVEI32(min_intro_pending); + SAVEI32(max_intro_pending); min_intro_pending = 0; - SAVEINT(comppad_name_fill); - SAVEINT(padix_floor); + SAVEI32(comppad_name_fill); + SAVEI32(padix_floor); padix_floor = padix; pad_reset_pending = FALSE; - SAVEINT(hints); + SAVEHINTS(); hints &= ~HINT_BLOCK_SCOPE; return retval; } OP* -block_end(line, floor, seq) -int line; -int floor; -OP* seq; +block_end(I32 floor, OP *seq) { + dTHR; int needblockscope = hints & HINT_BLOCK_SCOPE; OP* retval = scalarseq(seq); - if (copline > (line_t)line) - copline = line; LEAVE_SCOPE(floor); pad_reset_pending = FALSE; if (needblockscope) hints |= HINT_BLOCK_SCOPE; /* propagate out */ pad_leavemy(comppad_name_fill); + cop_seqmax++; return retval; } +STATIC OP * +newDEFSVOP(void) +{ +#ifdef USE_THREADS + OP *o = newOP(OP_THREADSV, 0); + o->op_targ = find_threadsv("_"); + return o; +#else + return newSVREF(newGVOP(OP_GV, 0, defgv)); +#endif /* USE_THREADS */ +} + void -newPROG(op) -OP *op; +newPROG(OP *o) { + dTHR; if (in_eval) { - eval_root = newUNOP(OP_LEAVEEVAL, 0, op); + eval_root = newUNOP(OP_LEAVEEVAL, ((in_eval & 4) ? OPf_SPECIAL : 0), o); eval_start = linklist(eval_root); eval_root->op_next = 0; peep(eval_start); } else { - if (!op) { - main_start = 0; + if (!o) return; - } - main_root = scope(sawparens(scalarvoid(op))); + main_root = scope(sawparens(scalarvoid(o))); curcop = &compiling; main_start = LINKLIST(main_root); main_root->op_next = 0; peep(main_start); + compcv = 0; + + /* Register with debugger */ + if (PERLDB_INTER) { + CV *cv = perl_get_cv("DB::postponed", FALSE); + if (cv) { + dSP; + PUSHMARK(SP); + XPUSHs((SV*)compiling.cop_filegv); + PUTBACK; + perl_call_sv((SV*)cv, G_DISCARD); + } + } } } OP * -localize(o, lex) -OP *o; -I32 lex; +localize(OP *o, I32 lex) { if (o->op_flags & OPf_PARENS) list(o); else { - scalar(o); if (dowarn && bufptr > oldbufptr && bufptr[-1] == ',') { char *s; for (s = bufptr; *s && (isALNUM(*s) || strchr("@$%, ",*s)); s++) ; @@ -1238,6 +1627,7 @@ I32 lex; } } in_my = FALSE; + in_my_stash = Nullhv; if (lex) return my(o); else @@ -1245,24 +1635,28 @@ I32 lex; } OP * -jmaybe(o) -OP *o; +jmaybe(OP *o) { if (o->op_type == OP_LIST) { - o = convert(OP_JOIN, 0, - prepend_elem(OP_LIST, - newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))), - o)); + OP *o2; +#ifdef USE_THREADS + o2 = newOP(OP_THREADSV, 0); + o2->op_targ = find_threadsv(";"); +#else + o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))), +#endif /* USE_THREADS */ + o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o)); } return o; } OP * -fold_constants(o) -register OP *o; +fold_constants(register OP *o) { + dTHR; register OP *curop; I32 type = o->op_type; + SV *sv; if (opargs[type] & OA_RETSCALAR) scalar(o); @@ -1275,6 +1669,22 @@ register OP *o; if (!(opargs[type] & OA_FOLDCONST)) goto nope; + switch (type) { + case OP_SPRINTF: + case OP_UCFIRST: + case OP_LCFIRST: + case OP_UC: + case OP_LC: + case OP_SLT: + case OP_SGT: + case OP_SLE: + case OP_SGE: + case OP_SCMP: + + if (o->op_private & OPpLOCALE) + goto nope; + } + if (error_count) goto nope; /* Don't try to run w/ errors */ @@ -1291,19 +1701,33 @@ register OP *o; curop = LINKLIST(o); o->op_next = 0; op = curop; - run(); - if (o->op_targ && *stack_sp == PAD_SV(o->op_targ)) /* grab pad temp? */ + CALLRUNOPS(); + sv = *(stack_sp--); + if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */ pad_swipe(o->op_targ); - else if (SvTEMP(*stack_sp)) { /* grab mortal temp? */ - (void)SvREFCNT_inc(*stack_sp); - SvTEMP_off(*stack_sp); + else if (SvTEMP(sv)) { /* grab mortal temp? */ + (void)SvREFCNT_inc(sv); + SvTEMP_off(sv); } op_free(o); if (type == OP_RV2GV) - return newGVOP(OP_GV, 0, *(stack_sp--)); - else - return newSVOP(OP_CONST, 0, *(stack_sp--)); - + return newGVOP(OP_GV, 0, (GV*)sv); + else { + /* try to smush double to int, but don't smush -2.0 to -2 */ + if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK && + type != OP_NEGATE) + { + IV iv = SvIV(sv); + if ((double)iv == SvNV(sv)) { + SvREFCNT_dec(sv); + sv = newSViv(iv); + } + else + SvIOK_off(sv); /* undo SvIV() damage */ + } + return newSVOP(OP_CONST, 0, sv); + } + nope: if (!(opargs[type] & OA_OTHERINT)) return o; @@ -1329,9 +1753,9 @@ register OP *o; } OP * -gen_constant_list(o) -register OP *o; +gen_constant_list(register OP *o) { + dTHR; register OP *curop; I32 oldtmps_floor = tmps_floor; @@ -1341,10 +1765,10 @@ register OP *o; op = curop = LINKLIST(o); o->op_next = 0; - pp_pushmark(); - run(); + pp_pushmark(ARGS); + CALLRUNOPS(); op = curop; - pp_anonlist(); + pp_anonlist(ARGS); tmps_floor = oldtmps_floor; o->op_type = OP_RV2AV; @@ -1357,45 +1781,41 @@ register OP *o; } OP * -convert(type, flags, op) -I32 type; -I32 flags; -OP* op; +convert(I32 type, I32 flags, OP *o) { OP *kid; OP *last = 0; - if (!op || op->op_type != OP_LIST) - op = newLISTOP(OP_LIST, 0, op, Nullop); + if (!o || o->op_type != OP_LIST) + o = newLISTOP(OP_LIST, 0, o, Nullop); + else + o->op_flags &= ~OPf_WANT; if (!(opargs[type] & OA_MARK)) - null(cLISTOP->op_first); + null(cLISTOPo->op_first); - op->op_type = type; - op->op_ppaddr = ppaddr[type]; - op->op_flags |= flags; + o->op_type = type; + o->op_ppaddr = ppaddr[type]; + o->op_flags |= flags; - op = (*check[type])(op); - if (op->op_type != type) - return op; + o = CHECKOP(type, o); + if (o->op_type != type) + return o; - if (cLISTOP->op_children < 7) { + if (cLISTOPo->op_children < 7) { /* XXX do we really need to do this if we're done appending?? */ - for (kid = cLISTOP->op_first; kid; kid = kid->op_sibling) + for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) last = kid; - cLISTOP->op_last = last; /* in case check substituted last arg */ + cLISTOPo->op_last = last; /* in case check substituted last arg */ } - return fold_constants(op); + return fold_constants(o); } /* List constructors */ OP * -append_elem(type, first, last) -I32 type; -OP* first; -OP* last; +append_elem(I32 type, OP *first, OP *last) { if (!first) return last; @@ -1418,10 +1838,7 @@ OP* last; } OP * -append_list(type, first, last) -I32 type; -LISTOP* first; -LISTOP* last; +append_list(I32 type, LISTOP *first, LISTOP *last) { if (!first) return (OP*)last; @@ -1446,10 +1863,7 @@ LISTOP* last; } OP * -prepend_elem(type, first, last) -I32 type; -OP* first; -OP* last; +prepend_elem(I32 type, OP *first, OP *last) { if (!first) return last; @@ -1480,27 +1894,22 @@ OP* last; /* Constructors */ OP * -newNULLLIST() +newNULLLIST(void) { return newOP(OP_STUB, 0); } OP * -force_list(op) -OP* op; +force_list(OP *o) { - if (!op || op->op_type != OP_LIST) - op = newLISTOP(OP_LIST, 0, op, Nullop); - null(op); - return op; + if (!o || o->op_type != OP_LIST) + o = newLISTOP(OP_LIST, 0, o, Nullop); + null(o); + return o; } OP * -newLISTOP(type, flags, first, last) -I32 type; -I32 flags; -OP* first; -OP* last; +newLISTOP(I32 type, I32 flags, OP *first, OP *last) { LISTOP *listop; @@ -1535,35 +1944,30 @@ OP* last; } OP * -newOP(type, flags) -I32 type; -I32 flags; +newOP(I32 type, I32 flags) { - OP *op; - Newz(1101, op, 1, OP); - op->op_type = type; - op->op_ppaddr = ppaddr[type]; - op->op_flags = flags; - - op->op_next = op; - /* op->op_private = 0; */ + OP *o; + Newz(1101, o, 1, OP); + o->op_type = type; + o->op_ppaddr = ppaddr[type]; + o->op_flags = flags; + + o->op_next = o; + o->op_private = 0 + (flags >> 8); if (opargs[type] & OA_RETSCALAR) - scalar(op); + scalar(o); if (opargs[type] & OA_TARGET) - op->op_targ = pad_alloc(type, SVs_PADTMP); - return (*check[type])(op); + o->op_targ = pad_alloc(type, SVs_PADTMP); + return CHECKOP(type, o); } OP * -newUNOP(type, flags, first) -I32 type; -I32 flags; -OP* first; +newUNOP(I32 type, I32 flags, OP *first) { UNOP *unop; if (!first) - first = newOP(OP_STUB, 0); + first = newOP(OP_STUB, 0); if (opargs[type] & OA_MARK) first = force_list(first); @@ -1572,9 +1976,14 @@ OP* first; unop->op_ppaddr = ppaddr[type]; unop->op_first = first; unop->op_flags = flags | OPf_KIDS; - unop->op_private = 1; - - unop = (UNOP*)(*check[type])((OP*)unop); + unop->op_private = 1 | (flags >> 8); +#if 1 + if(type == OP_STUDY && first->op_type == OP_MATCH) { + first->op_type = OP_PUSHRE; + first->op_ppaddr = ppaddr[OP_PUSHRE]; + } +#endif + unop = (UNOP*) CHECKOP(type, unop); if (unop->op_next) return (OP*)unop; @@ -1582,11 +1991,7 @@ OP* first; } OP * -newBINOP(type, flags, first, last) -I32 type; -I32 flags; -OP* first; -OP* last; +newBINOP(I32 type, I32 flags, OP *first, OP *last) { BINOP *binop; Newz(1101, binop, 1, BINOP); @@ -1600,14 +2005,14 @@ OP* last; binop->op_flags = flags | OPf_KIDS; if (!last) { last = first; - binop->op_private = 1; + binop->op_private = 1 | (flags >> 8); } else { - binop->op_private = 2; + binop->op_private = 2 | (flags >> 8); first->op_sibling = last; } - binop = (BINOP*)(*check[type])((OP*)binop); + binop = (BINOP*)CHECKOP(type, binop); if (binop->op_next) return (OP*)binop; @@ -1617,85 +2022,86 @@ OP* last; } OP * -pmtrans(op, expr, repl) -OP *op; -OP *expr; -OP *repl; +pmtrans(OP *o, OP *expr, OP *repl) { SV *tstr = ((SVOP*)expr)->op_sv; SV *rstr = ((SVOP*)repl)->op_sv; STRLEN tlen; STRLEN rlen; - register char *t = SvPV(tstr, tlen); - register char *r = SvPV(rstr, rlen); + register U8 *t = (U8*)SvPV(tstr, tlen); + register U8 *r = (U8*)SvPV(rstr, rlen); register I32 i; register I32 j; - I32 squash; - I32 delete; + I32 Delete; I32 complement; + I32 squash; register short *tbl; - tbl = (short*)cPVOP->op_pv; - complement = op->op_private & OPpTRANS_COMPLEMENT; - delete = op->op_private & OPpTRANS_DELETE; - squash = op->op_private & OPpTRANS_SQUASH; + tbl = (short*)cPVOPo->op_pv; + complement = o->op_private & OPpTRANS_COMPLEMENT; + Delete = o->op_private & OPpTRANS_DELETE; + squash = o->op_private & OPpTRANS_SQUASH; if (complement) { Zero(tbl, 256, short); for (i = 0; i < tlen; i++) - tbl[t[i] & 0377] = -1; + tbl[t[i]] = -1; for (i = 0, j = 0; i < 256; i++) { if (!tbl[i]) { if (j >= rlen) { - if (delete) + if (Delete) tbl[i] = -2; else if (rlen) - tbl[i] = r[j-1] & 0377; + tbl[i] = r[j-1]; else tbl[i] = i; } else - tbl[i] = r[j++] & 0377; + tbl[i] = r[j++]; } } } else { - if (!rlen && !delete) { + if (!rlen && !Delete) { r = t; rlen = tlen; + if (!squash) + o->op_private |= OPpTRANS_COUNTONLY; } for (i = 0; i < 256; i++) tbl[i] = -1; for (i = 0, j = 0; i < tlen; i++,j++) { if (j >= rlen) { - if (delete) { - if (tbl[t[i] & 0377] == -1) - tbl[t[i] & 0377] = -2; + if (Delete) { + if (tbl[t[i]] == -1) + tbl[t[i]] = -2; continue; } --j; } - if (tbl[t[i] & 0377] == -1) - tbl[t[i] & 0377] = r[j] & 0377; + if (tbl[t[i]] == -1) + tbl[t[i]] = r[j]; } } op_free(expr); op_free(repl); - return op; + return o; } OP * -newPMOP(type, flags) -I32 type; -I32 flags; +newPMOP(I32 type, I32 flags) { + dTHR; PMOP *pmop; Newz(1101, pmop, 1, PMOP); pmop->op_type = type; pmop->op_ppaddr = ppaddr[type]; pmop->op_flags = flags; - pmop->op_private = 0; + pmop->op_private = 0 | (flags >> 8); + + if (hints & HINT_LOCALE) + pmop->op_pmpermflags = (pmop->op_pmflags |= PMf_LOCALE); /* link into pm list */ if (type != OP_TRANS && curstash) { @@ -1707,37 +2113,30 @@ I32 flags; } OP * -pmruntime(op, expr, repl) -OP *op; -OP *expr; -OP *repl; +pmruntime(OP *o, OP *expr, OP *repl) { PMOP *pm; LOGOP *rcop; + I32 repl_has_vars = 0; - if (op->op_type == OP_TRANS) - return pmtrans(op, expr, repl); + if (o->op_type == OP_TRANS) + return pmtrans(o, expr, repl); - pm = (PMOP*)op; + hints |= HINT_BLOCK_SCOPE; + pm = (PMOP*)o; if (expr->op_type == OP_CONST) { STRLEN plen; SV *pat = ((SVOP*)expr)->op_sv; char *p = SvPV(pat, plen); - if ((op->op_flags & OPf_SPECIAL) && strEQ(p, " ")) { + if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) { sv_setpvn(pat, "\\s+", 3); p = SvPV(pat, plen); pm->op_pmflags |= PMf_SKIPWHITE; } -#ifdef NOTDEF - scan_prefix(pm, p, plen); - if (pm->op_pmshort && (pm->op_pmflags & PMf_SCANFIRST)) - fbm_compile(pm->op_pmshort, pm->op_pmflags & PMf_FOLD); -#endif - pm->op_pmregexp = regcomp(p, p + plen, pm); - if (strEQ("\\s+", pm->op_pmregexp->precomp)) + pm->op_pmregexp = pregcomp(p, p + plen, pm); + if (strEQ("\\s+", pm->op_pmregexp->precomp)) pm->op_pmflags |= PMf_WHITE; - hoistmust(pm); op_free(expr); } else { @@ -1750,7 +2149,7 @@ OP *repl; rcop->op_first = scalar(expr); rcop->op_flags |= OPf_KIDS; rcop->op_private = 1; - rcop->op_other = op; + rcop->op_other = o; /* establish postfix order */ if (pm->op_pmflags & PMf_KEEP) { @@ -1763,24 +2162,41 @@ OP *repl; expr->op_next = (OP*)rcop; } - prepend_elem(op->op_type, scalar((OP*)rcop), op); + prepend_elem(o->op_type, scalar((OP*)rcop), o); } if (repl) { - if (repl->op_type == OP_CONST) { - pm->op_pmflags |= PMf_CONST; - prepend_elem(op->op_type, scalar(repl), op); + OP *curop; + if (pm->op_pmflags & PMf_EVAL) + curop = 0; +#ifdef USE_THREADS + else if (repl->op_type == OP_THREADSV + && strchr("&`'123456789+", + threadsv_names[repl->op_targ])) + { + curop = 0; } +#endif /* USE_THREADS */ + else if (repl->op_type == OP_CONST) + curop = repl; else { - OP *curop; OP *lastop = 0; for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) { if (opargs[curop->op_type] & OA_DANGEROUS) { +#ifdef USE_THREADS + if (curop->op_type == OP_THREADSV) { + repl_has_vars = 1; + if (strchr("&`'123456789+", curop->op_private)) + break; + } +#else if (curop->op_type == OP_GV) { GV *gv = ((GVOP*)curop)->op_gv; + repl_has_vars = 1; if (strchr("&`'123456789+", *GvENAME(gv))) break; } +#endif /* USE_THREADS */ else if (curop->op_type == OP_RV2CV) break; else if (curop->op_type == OP_RV2SV || @@ -1790,32 +2206,46 @@ OP *repl; if (lastop && lastop->op_type != OP_GV) /*funny deref?*/ break; } + else if (curop->op_type == OP_PADSV || + curop->op_type == OP_PADAV || + curop->op_type == OP_PADHV || + curop->op_type == OP_PADANY) { + repl_has_vars = 1; + } else break; } lastop = curop; } - if (curop == repl) { - pm->op_pmflags |= PMf_CONST; /* const for long enough */ - prepend_elem(op->op_type, scalar(repl), op); - } - else { - Newz(1101, rcop, 1, LOGOP); - rcop->op_type = OP_SUBSTCONT; - rcop->op_ppaddr = ppaddr[OP_SUBSTCONT]; - rcop->op_first = scalar(repl); - rcop->op_flags |= OPf_KIDS; - rcop->op_private = 1; - rcop->op_other = op; - - /* establish postfix order */ - rcop->op_next = LINKLIST(repl); - repl->op_next = (OP*)rcop; - - pm->op_pmreplroot = scalar((OP*)rcop); - pm->op_pmreplstart = LINKLIST(rcop); - rcop->op_next = 0; + } + if (curop == repl + && !(repl_has_vars + && (!pm->op_pmregexp + || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) { + pm->op_pmflags |= PMf_CONST; /* const for long enough */ + pm->op_pmpermflags |= PMf_CONST; /* const for long enough */ + prepend_elem(o->op_type, scalar(repl), o); + } + else { + if (curop == repl && !pm->op_pmregexp) { /* Has variables. */ + pm->op_pmflags |= PMf_MAYBE_CONST; + pm->op_pmpermflags |= PMf_MAYBE_CONST; } + Newz(1101, rcop, 1, LOGOP); + rcop->op_type = OP_SUBSTCONT; + rcop->op_ppaddr = ppaddr[OP_SUBSTCONT]; + rcop->op_first = scalar(repl); + rcop->op_flags |= OPf_KIDS; + rcop->op_private = 1; + rcop->op_other = o; + + /* establish postfix order */ + rcop->op_next = LINKLIST(repl); + repl->op_next = (OP*)rcop; + + pm->op_pmreplroot = scalar((OP*)rcop); + pm->op_pmreplstart = LINKLIST(rcop); + rcop->op_next = 0; } } @@ -1823,10 +2253,7 @@ OP *repl; } OP * -newSVOP(type, flags, sv) -I32 type; -I32 flags; -SV *sv; +newSVOP(I32 type, I32 flags, SV *sv) { SVOP *svop; Newz(1101, svop, 1, SVOP); @@ -1839,15 +2266,13 @@ SV *sv; scalar((OP*)svop); if (opargs[type] & OA_TARGET) svop->op_targ = pad_alloc(type, SVs_PADTMP); - return (*check[type])((OP*)svop); + return CHECKOP(type, svop); } OP * -newGVOP(type, flags, gv) -I32 type; -I32 flags; -GV *gv; +newGVOP(I32 type, I32 flags, GV *gv) { + dTHR; GVOP *gvop; Newz(1101, gvop, 1, GVOP); gvop->op_type = type; @@ -1859,14 +2284,11 @@ GV *gv; scalar((OP*)gvop); if (opargs[type] & OA_TARGET) gvop->op_targ = pad_alloc(type, SVs_PADTMP); - return (*check[type])((OP*)gvop); + return CHECKOP(type, gvop); } OP * -newPVOP(type, flags, pv) -I32 type; -I32 flags; -char *pv; +newPVOP(I32 type, I32 flags, char *pv) { PVOP *pvop; Newz(1101, pvop, 1, PVOP); @@ -1879,47 +2301,25 @@ char *pv; scalar((OP*)pvop); if (opargs[type] & OA_TARGET) pvop->op_targ = pad_alloc(type, SVs_PADTMP); - return (*check[type])((OP*)pvop); -} - -OP * -newCVOP(type, flags, cv, cont) -I32 type; -I32 flags; -CV *cv; -OP *cont; -{ - CVOP *cvop; - Newz(1101, cvop, 1, CVOP); - cvop->op_type = type; - cvop->op_ppaddr = ppaddr[type]; - cvop->op_cv = cv; - cvop->op_cont = cont; - cvop->op_next = (OP*)cvop; - cvop->op_flags = flags; - if (opargs[type] & OA_RETSCALAR) - scalar((OP*)cvop); - if (opargs[type] & OA_TARGET) - cvop->op_targ = pad_alloc(type, SVs_PADTMP); - return (*check[type])((OP*)cvop); + return CHECKOP(type, pvop); } void -package(op) -OP *op; +package(OP *o) { + dTHR; SV *sv; save_hptr(&curstash); save_item(curstname); - if (op) { + if (o) { STRLEN len; char *name; - sv = cSVOP->op_sv; + sv = cSVOPo->op_sv; name = SvPV(sv, len); - curstash = gv_stashpv(name,TRUE); + curstash = gv_stashpvn(name,len,TRUE); sv_setpvn(curstname, name, len); - op_free(op); + op_free(o); } else { sv_setpv(curstname,""); @@ -1930,42 +2330,75 @@ OP *op; } void -utilize(aver, id, arg) -int aver; -OP *id; -OP *arg; +utilize(int aver, I32 floor, OP *version, OP *id, OP *arg) { OP *pack; OP *meth; OP *rqop; OP *imop; + OP *veop; if (id->op_type != OP_CONST) croak("Module name must be constant"); - meth = newSVOP(OP_CONST, 0, - aver - ? newSVpv("import", 6) - : newSVpv("unimport", 8) - ); + veop = Nullop; - /* Make copy of id so we don't free it twice */ - pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv)); + if(version != Nullop) { + SV *vesv = ((SVOP*)version)->op_sv; - /* Fake up a require */ - rqop = newUNOP(OP_REQUIRE, 0, id); + if (arg == Nullop && !SvNIOK(vesv)) { + arg = version; + } + else { + OP *pack; + OP *meth; + + if (version->op_type != OP_CONST || !SvNIOK(vesv)) + croak("Version number must be constant number"); + + /* Make copy of id so we don't free it twice */ + pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv)); + + /* Fake up a method call to VERSION */ + meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7)); + veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL, + append_elem(OP_LIST, + prepend_elem(OP_LIST, pack, list(version)), + newUNOP(OP_METHOD, 0, meth))); + } + } /* Fake up an import/unimport */ - imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL, + if (arg && arg->op_type == OP_STUB) + imop = arg; /* no import on explicit () */ + else if(SvNIOK(((SVOP*)id)->op_sv)) { + imop = Nullop; /* use 5.0; */ + } + else { + /* Make copy of id so we don't free it twice */ + pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv)); + meth = newSVOP(OP_CONST, 0, + aver + ? newSVpv("import", 6) + : newSVpv("unimport", 8) + ); + imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL, append_elem(OP_LIST, prepend_elem(OP_LIST, pack, list(arg)), newUNOP(OP_METHOD, 0, meth))); + } + + /* Fake up a require */ + rqop = newUNOP(OP_REQUIRE, 0, id); /* Fake up the BEGIN {}, which does its thing immediately. */ - newSUB(start_subparse(), + newSUB(floor, newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)), + Nullop, append_elem(OP_LINESEQ, - newSTATEOP(0, Nullch, rqop), + append_elem(OP_LINESEQ, + newSTATEOP(0, Nullch, rqop), + newSTATEOP(0, Nullch, veop)), newSTATEOP(0, Nullch, imop) )); copline = NOLINE; @@ -1973,29 +2406,25 @@ OP *arg; } OP * -newSLICEOP(flags, subscript, listval) -I32 flags; -OP *subscript; -OP *listval; +newSLICEOP(I32 flags, OP *subscript, OP *listval) { return newBINOP(OP_LSLICE, flags, list(force_list(subscript)), list(force_list(listval)) ); } -static I32 -list_assignment(op) -register OP *op; +STATIC I32 +list_assignment(register OP *o) { - if (!op) + if (!o) return TRUE; - if (op->op_type == OP_NULL && op->op_flags & OPf_KIDS) - op = cUNOP->op_first; + if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS) + o = cUNOPo->op_first; - if (op->op_type == OP_COND_EXPR) { - I32 t = list_assignment(cCONDOP->op_first->op_sibling); - I32 f = list_assignment(cCONDOP->op_first->op_sibling->op_sibling); + if (o->op_type == OP_COND_EXPR) { + I32 t = list_assignment(cCONDOPo->op_first->op_sibling); + I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling); if (t && f) return TRUE; @@ -2004,28 +2433,24 @@ register OP *op; return FALSE; } - if (op->op_type == OP_LIST || op->op_flags & OPf_PARENS || - op->op_type == OP_RV2AV || op->op_type == OP_RV2HV || - op->op_type == OP_ASLICE || op->op_type == OP_HSLICE) + if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS || + o->op_type == OP_RV2AV || o->op_type == OP_RV2HV || + o->op_type == OP_ASLICE || o->op_type == OP_HSLICE) return TRUE; - if (op->op_type == OP_PADAV || op->op_type == OP_PADHV) + if (o->op_type == OP_PADAV || o->op_type == OP_PADHV) return TRUE; - if (op->op_type == OP_RV2SV) + if (o->op_type == OP_RV2SV) return FALSE; return FALSE; } OP * -newASSIGNOP(flags, left, optype, right) -I32 flags; -OP *left; -I32 optype; -OP *right; +newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right) { - OP *op; + OP *o; if (optype) { if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) { @@ -2040,47 +2465,26 @@ OP *right; } if (list_assignment(left)) { + dTHR; modcount = 0; - eval_start = right; /* Grandfathering $[ assignment here. Bletch. */ + eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/ left = mod(left, OP_AASSIGN); - if (!eval_start) { + if (eval_start) + eval_start = 0; + else { op_free(left); op_free(right); return Nullop; } - if (right && right->op_type == OP_SPLIT) { - if ((op = ((LISTOP*)right)->op_first) && op->op_type == OP_PUSHRE) { - PMOP *pm = (PMOP*)op; - if (left->op_type == OP_RV2AV && - !(left->op_private & OPpLVAL_INTRO) ) - { - op = ((UNOP*)left)->op_first; - if (op->op_type == OP_GV && !pm->op_pmreplroot) { - pm->op_pmreplroot = (OP*)((GVOP*)op)->op_gv; - pm->op_pmflags |= PMf_ONCE; - op_free(left); - return right; - } - } - else { - if (modcount < 10000) { - SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv; - if (SvIVX(sv) == 0) - sv_setiv(sv, modcount+1); - } - } - } - } - op = newBINOP(OP_AASSIGN, flags, + o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), list(force_list(left)) ); - op->op_private = 0; + o->op_private = 0 | (flags >> 8); if (!(left->op_private & OPpLVAL_INTRO)) { - static int generation = 0; OP *curop; - OP *lastop = op; + OP *lastop = o; generation++; - for (curop = LINKLIST(op); curop != op; curop = LINKLIST(curop)) { + for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) { if (opargs[curop->op_type] & OA_DANGEROUS) { if (curop->op_type == OP_GV) { GV *gv = ((GVOP*)curop)->op_gv; @@ -2088,6 +2492,16 @@ OP *right; break; SvCUR(gv) = generation; } + else if (curop->op_type == OP_PADSV || + curop->op_type == OP_PADAV || + curop->op_type == OP_PADHV || + curop->op_type == OP_PADANY) { + SV **svp = AvARRAY(comppad_name); + SV *sv = svp[curop->op_targ]; + if (SvCUR(sv) == generation) + break; + SvCUR(sv) = generation; /* (SvCUR not used any more) */ + } else if (curop->op_type == OP_RV2CV) break; else if (curop->op_type == OP_RV2SV || @@ -2102,10 +2516,45 @@ OP *right; } lastop = curop; } - if (curop != op) - op->op_private = OPpASSIGN_COMMON; + if (curop != o) + o->op_private = OPpASSIGN_COMMON; + } + if (right && right->op_type == OP_SPLIT) { + OP* tmpop; + if ((tmpop = ((LISTOP*)right)->op_first) && + tmpop->op_type == OP_PUSHRE) + { + PMOP *pm = (PMOP*)tmpop; + if (left->op_type == OP_RV2AV && + !(left->op_private & OPpLVAL_INTRO) && + !(o->op_private & OPpASSIGN_COMMON) ) + { + tmpop = ((UNOP*)left)->op_first; + if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) { + pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv; + pm->op_pmflags |= PMf_ONCE; + tmpop = cUNOPo->op_first; /* to list (nulled) */ + tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */ + tmpop->op_sibling = Nullop; /* don't free split */ + right->op_next = tmpop->op_next; /* fix starting loc */ + op_free(o); /* blow off assign */ + right->op_flags &= ~OPf_WANT; + /* "I don't know and I don't care." */ + return right; + } + } + else { + if (modcount < 10000 && + ((LISTOP*)right)->op_last->op_type == OP_CONST) + { + SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv; + if (SvIVX(sv) == 0) + sv_setiv(sv, modcount+1); + } + } + } } - return op; + return o; } if (!right) right = newOP(OP_UNDEF, 0); @@ -2114,40 +2563,28 @@ OP *right; return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right)); } else { - eval_start = right; /* Grandfathering $[ assignment here. Bletch. */ - op = newBINOP(OP_SASSIGN, flags, + eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/ + o = newBINOP(OP_SASSIGN, flags, scalar(right), mod(scalar(left), OP_SASSIGN) ); - if (!eval_start) { - op_free(op); + if (eval_start) + eval_start = 0; + else { + op_free(o); return Nullop; } } - return op; + return o; } OP * -newSTATEOP(flags, label, op) -I32 flags; -char *label; -OP *op; +newSTATEOP(I32 flags, char *label, OP *o) { + dTHR; + U32 seq = intro_my(); register COP *cop; - /* Introduce my variables. */ - if (min_intro_pending) { - SV **svp = AvARRAY(comppad_name); - I32 i; - SV *sv; - for (i = min_intro_pending; i <= max_intro_pending; i++) { - if ((sv = svp[i]) && sv != &sv_undef) - SvIVX(sv) = 999999999; /* Don't know scope end yet. */ - } - min_intro_pending = 0; - comppad_name_fill = max_intro_pending; /* Needn't search higher */ - } - Newz(1101, cop, 1, COP); - if (perldb && curcop->cop_line && curstash != debstash) { + if (PERLDB_LINE && curcop->cop_line && curstash != debstash) { cop->op_type = OP_DBSTATE; cop->op_ppaddr = ppaddr[ OP_DBSTATE ]; } @@ -2156,14 +2593,17 @@ OP *op; cop->op_ppaddr = ppaddr[ OP_NEXTSTATE ]; } cop->op_flags = flags; - cop->op_private = 0; + cop->op_private = 0 | (flags >> 8); +#ifdef NATIVE_HINTS + cop->op_private |= NATIVE_HINTS; +#endif cop->op_next = (OP*)cop; if (label) { cop->cop_label = label; hints |= HINT_BLOCK_SCOPE; } - cop->cop_seq = cop_seqmax++; + cop->cop_seq = seq; cop->cop_arybase = curcop->cop_arybase; if (copline == NOLINE) @@ -2172,30 +2612,58 @@ OP *op; cop->cop_line = copline; copline = NOLINE; } - cop->cop_filegv = SvREFCNT_inc(curcop->cop_filegv); + cop->cop_filegv = (GV*)SvREFCNT_inc(curcop->cop_filegv); cop->cop_stash = curstash; - if (perldb && curstash != debstash) { + if (PERLDB_LINE && curstash != debstash) { SV **svp = av_fetch(GvAV(curcop->cop_filegv),(I32)cop->cop_line, FALSE); if (svp && *svp != &sv_undef && !SvIOK(*svp)) { - SvIVX(*svp) = 1; (void)SvIOK_on(*svp); + SvIVX(*svp) = 1; SvSTASH(*svp) = (HV*)cop; } } - return prepend_elem(OP_LINESEQ, (OP*)cop, op); + return prepend_elem(OP_LINESEQ, (OP*)cop, o); +} + +/* "Introduce" my variables to visible status. */ +U32 +intro_my(void) +{ + SV **svp; + SV *sv; + I32 i; + + if (! min_intro_pending) + return cop_seqmax; + + svp = AvARRAY(comppad_name); + for (i = min_intro_pending; i <= max_intro_pending; i++) { + if ((sv = svp[i]) && sv != &sv_undef && !SvIVX(sv)) { + SvIVX(sv) = 999999999; /* Don't know scope end yet. */ + SvNVX(sv) = (double)cop_seqmax; + } + } + min_intro_pending = 0; + comppad_name_fill = max_intro_pending; /* Needn't search higher */ + return cop_seqmax++; } OP * -newLOGOP(type, flags, first, other) -I32 type; -I32 flags; -OP* first; -OP* other; +newLOGOP(I32 type, I32 flags, OP *first, OP *other) { + return new_logop(type, flags, &first, &other); +} + +STATIC OP * +new_logop(I32 type, I32 flags, OP** firstp, OP** otherp) +{ + dTHR; LOGOP *logop; - OP *op; + OP *o; + OP *first = *firstp; + OP *other = *otherp; if (type == OP_XOR) /* Not short circuit, but here by precedence. */ return newBINOP(type, flags, scalar(first), scalar(other)); @@ -2208,23 +2676,25 @@ OP* other; type = OP_OR; else type = OP_AND; - op = first; - first = cUNOP->op_first; - if (op->op_next) - first->op_next = op->op_next; - cUNOP->op_first = Nullop; - op_free(op); + o = first; + first = *firstp = cUNOPo->op_first; + if (o->op_next) + first->op_next = o->op_next; + cUNOPo->op_first = Nullop; + op_free(o); } } if (first->op_type == OP_CONST) { if (dowarn && (first->op_private & OPpCONST_BARE)) - warn("Probable precedence problem on %s", op_name[type]); + warn("Probable precedence problem on %s", op_desc[type]); if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) { op_free(first); + *firstp = Nullop; return other; } else { op_free(other); + *otherp = Nullop; return first; } } @@ -2234,6 +2704,36 @@ OP* other; else scalar(other); } + else if (dowarn && (first->op_flags & OPf_KIDS)) { + OP *k1 = ((UNOP*)first)->op_first; + OP *k2 = k1->op_sibling; + OPCODE warnop = 0; + switch (first->op_type) + { + case OP_NULL: + if (k2 && k2->op_type == OP_READLINE + && (k2->op_flags & OPf_STACKED) + && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR)) + warnop = k2->op_type; + break; + + case OP_SASSIGN: + if (k1->op_type == OP_READDIR + || k1->op_type == OP_GLOB + || k1->op_type == OP_EACH) + warnop = k1->op_type; + break; + } + if (warnop) { + line_t oldline = curcop->cop_line; + curcop->cop_line = copline; + warn("Value of %s%s can be \"0\"; test with defined()", + op_desc[warnop], + ((warnop == OP_READLINE || warnop == OP_GLOB) + ? " construct" : "() operator")); + curcop->cop_line = oldline; + } + } if (!other) return first; @@ -2248,50 +2748,47 @@ OP* other; logop->op_first = first; logop->op_flags = flags | OPf_KIDS; logop->op_other = LINKLIST(other); - logop->op_private = 1; + logop->op_private = 1 | (flags >> 8); /* establish postfix order */ logop->op_next = LINKLIST(first); first->op_next = (OP*)logop; first->op_sibling = other; - op = newUNOP(OP_NULL, 0, (OP*)logop); - other->op_next = op; + o = newUNOP(OP_NULL, 0, (OP*)logop); + other->op_next = o; - return op; + return o; } OP * -newCONDOP(flags, first, true, false) -I32 flags; -OP* first; -OP* true; -OP* false; +newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop) { + dTHR; CONDOP *condop; - OP *op; + OP *o; - if (!false) - return newLOGOP(OP_AND, 0, first, true); - if (!true) - return newLOGOP(OP_OR, 0, first, false); + if (!falseop) + return newLOGOP(OP_AND, 0, first, trueop); + if (!trueop) + return newLOGOP(OP_OR, 0, first, falseop); scalarboolean(first); if (first->op_type == OP_CONST) { if (SvTRUE(((SVOP*)first)->op_sv)) { op_free(first); - op_free(false); - return true; + op_free(falseop); + return trueop; } else { op_free(first); - op_free(true); - return false; + op_free(trueop); + return falseop; } } else if (first->op_type == OP_WANTARRAY) { - list(true); - scalar(false); + list(trueop); + scalar(falseop); } Newz(1101, condop, 1, CONDOP); @@ -2299,34 +2796,32 @@ OP* false; condop->op_ppaddr = ppaddr[OP_COND_EXPR]; condop->op_first = first; condop->op_flags = flags | OPf_KIDS; - condop->op_true = LINKLIST(true); - condop->op_false = LINKLIST(false); - condop->op_private = 1; + condop->op_true = LINKLIST(trueop); + condop->op_false = LINKLIST(falseop); + condop->op_private = 1 | (flags >> 8); /* establish postfix order */ condop->op_next = LINKLIST(first); first->op_next = (OP*)condop; - first->op_sibling = true; - true->op_sibling = false; - op = newUNOP(OP_NULL, 0, (OP*)condop); + first->op_sibling = trueop; + trueop->op_sibling = falseop; + o = newUNOP(OP_NULL, 0, (OP*)condop); - true->op_next = op; - false->op_next = op; + trueop->op_next = o; + falseop->op_next = o; - return op; + return o; } OP * -newRANGE(flags, left, right) -I32 flags; -OP *left; -OP *right; +newRANGE(I32 flags, OP *left, OP *right) { + dTHR; CONDOP *condop; OP *flip; OP *flop; - OP *op; + OP *o; Newz(1101, condop, 1, CONDOP); @@ -2336,14 +2831,14 @@ OP *right; condop->op_flags = OPf_KIDS; condop->op_true = LINKLIST(left); condop->op_false = LINKLIST(right); - condop->op_private = 1; + condop->op_private = 1 | (flags >> 8); left->op_sibling = right; condop->op_next = (OP*)condop; flip = newUNOP(OP_FLIP, flags, (OP*)condop); flop = newUNOP(OP_FLOP, 0, flip); - op = newUNOP(OP_NULL, 0, flop); + o = newUNOP(OP_NULL, 0, flop); linklist(flop); left->op_next = flip; @@ -2357,89 +2852,136 @@ OP *right; flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0; flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0; - flip->op_next = op; + flip->op_next = o; if (!flip->op_private || !flop->op_private) - linklist(op); /* blow off optimizer unless constant */ + linklist(o); /* blow off optimizer unless constant */ - return op; + return o; } OP * -newLOOPOP(flags, debuggable, expr, block) -I32 flags; -I32 debuggable; -OP *expr; -OP *block; +newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block) { + dTHR; OP* listop; - OP* op; + OP* o; int once = block && block->op_flags & OPf_SPECIAL && (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL); if (expr) { if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv)) return block; /* do {} while 0 does once */ - else if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB) - expr = newASSIGNOP(0, newSVREF(newGVOP(OP_GV, 0, defgv)), 0, expr); + if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB + || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) { + expr = newUNOP(OP_DEFINED, 0, + newASSIGNOP(0, newDEFSVOP(), 0, expr) ); + } else if (expr->op_flags & OPf_KIDS) { + OP *k1 = ((UNOP*)expr)->op_first; + OP *k2 = (k1) ? k1->op_sibling : NULL; + switch (expr->op_type) { + case OP_NULL: + if (k2 && k2->op_type == OP_READLINE + && (k2->op_flags & OPf_STACKED) + && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR)) + expr = newUNOP(OP_DEFINED, 0, expr); + break; + + case OP_SASSIGN: + if (k1->op_type == OP_READDIR + || k1->op_type == OP_GLOB + || k1->op_type == OP_EACH) + expr = newUNOP(OP_DEFINED, 0, expr); + break; + } + } } listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0)); - op = newLOGOP(OP_AND, 0, expr, listop); + o = new_logop(OP_AND, 0, &expr, &listop); + + if (listop) + ((LISTOP*)listop)->op_last->op_next = LINKLIST(o); - ((LISTOP*)listop)->op_last->op_next = LINKLIST(op); + if (once && o != listop) + o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other; - if (once && op != listop) - op->op_next = ((LOGOP*)cUNOP->op_first)->op_other; + if (o == listop) + o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */ - op->op_flags |= flags; - op = scope(op); - op->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration */ - return op; + o->op_flags |= flags; + o = scope(o); + o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/ + return o; } OP * -newWHILEOP(flags, debuggable, loop, expr, block, cont) -I32 flags; -I32 debuggable; -LOOP *loop; -OP *expr; -OP *block; -OP *cont; +newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont) { + dTHR; OP *redo; OP *next = 0; OP *listop; - OP *op; + OP *o; OP *condop; - if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB)) - expr = newASSIGNOP(0, newSVREF(newGVOP(OP_GV, 0, defgv)), 0, expr); + if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB + || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) { + expr = newUNOP(OP_DEFINED, 0, + newASSIGNOP(0, newDEFSVOP(), 0, expr) ); + } else if (expr && (expr->op_flags & OPf_KIDS)) { + OP *k1 = ((UNOP*)expr)->op_first; + OP *k2 = (k1) ? k1->op_sibling : NULL; + switch (expr->op_type) { + case OP_NULL: + if (k2 && k2->op_type == OP_READLINE + && (k2->op_flags & OPf_STACKED) + && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR)) + expr = newUNOP(OP_DEFINED, 0, expr); + break; + + case OP_SASSIGN: + if (k1->op_type == OP_READDIR + || k1->op_type == OP_GLOB + || k1->op_type == OP_EACH) + expr = newUNOP(OP_DEFINED, 0, expr); + break; + } + } if (!block) block = newOP(OP_NULL, 0); if (cont) next = LINKLIST(cont); - if (expr) + if (expr) { cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0)); + if ((line_t)whileline != NOLINE) { + copline = whileline; + cont = append_elem(OP_LINESEQ, cont, + newSTATEOP(0, Nullch, Nullop)); + } + } listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont); redo = LINKLIST(listop); if (expr) { - op = newLOGOP(OP_AND, 0, expr, scalar(listop)); - if (op == expr && op->op_type == OP_CONST && !SvTRUE(cSVOP->op_sv)) { + copline = whileline; + scalar(listop); + o = new_logop(OP_AND, 0, &expr, &listop); + if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) { op_free(expr); /* oops, it's a while (0) */ op_free((OP*)loop); - return Nullop; /* (listop already freed by newLOGOP) */ + return Nullop; /* listop already freed by new_logop */ } - ((LISTOP*)listop)->op_last->op_next = condop = - (op == listop ? redo : LINKLIST(op)); + if (listop) + ((LISTOP*)listop)->op_last->op_next = condop = + (o == listop ? redo : LINKLIST(o)); if (!next) next = condop; } else - op = listop; + o = listop; if (!loop) { Newz(1101,loop,1,LOOP); @@ -2449,280 +2991,720 @@ OP *cont; loop->op_next = (OP*)loop; } - op = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, op); + o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o); loop->op_redoop = redo; - loop->op_lastop = op; + loop->op_lastop = o; if (next) loop->op_nextop = next; else - loop->op_nextop = op; + loop->op_nextop = o; - op->op_flags |= flags; - return op; + o->op_flags |= flags; + o->op_private |= (flags >> 8); + return o; } OP * -#ifndef CAN_PROTOTYPE -newFOROP(flags,label,forline,sv,expr,block,cont) -I32 flags; -char *label; -line_t forline; -OP* sv; -OP* expr; -OP*block; -OP*cont; -#else newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont) -#endif /* CAN_PROTOTYPE */ { LOOP *loop; + OP *wop; int padoff = 0; + I32 iterflags = 0; - copline = forline; if (sv) { if (sv->op_type == OP_RV2SV) { /* symbol table variable */ - OP *op = sv; - sv = cUNOP->op_first; - sv->op_next = sv; - cUNOP->op_first = Nullop; - op_free(op); + sv->op_type = OP_RV2GV; + sv->op_ppaddr = ppaddr[OP_RV2GV]; } else if (sv->op_type == OP_PADSV) { /* private variable */ padoff = sv->op_targ; op_free(sv); sv = Nullop; } + else if (sv->op_type == OP_THREADSV) { /* per-thread variable */ + padoff = sv->op_targ; + iterflags |= OPf_SPECIAL; + op_free(sv); + sv = Nullop; + } else - croak("Can't use %s for loop variable", op_name[sv->op_type]); + croak("Can't use %s for loop variable", op_desc[sv->op_type]); } else { +#ifdef USE_THREADS + padoff = find_threadsv("_"); + iterflags |= OPf_SPECIAL; +#else sv = newGVOP(OP_GV, 0, defgv); +#endif + } + if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) { + expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART); + iterflags |= OPf_STACKED; + } + else if (expr->op_type == OP_NULL && + (expr->op_flags & OPf_KIDS) && + ((BINOP*)expr)->op_first->op_type == OP_FLOP) + { + /* Basically turn for($x..$y) into the same as for($x,$y), but we + * set the STACKED flag to indicate that these values are to be + * treated as min/max values by 'pp_iterinit'. + */ + UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first; + CONDOP* range = (CONDOP*) flip->op_first; + OP* left = range->op_first; + OP* right = left->op_sibling; + LISTOP* listop; + + range->op_flags &= ~OPf_KIDS; + range->op_first = Nullop; + + listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right); + listop->op_first->op_next = range->op_true; + left->op_next = range->op_false; + right->op_next = (OP*)listop; + listop->op_next = listop->op_first; + + op_free(expr); + expr = (OP*)(listop); + null(expr); + iterflags |= OPf_STACKED; + } + else { + expr = mod(force_list(expr), OP_GREPSTART); } - loop = (LOOP*)list(convert(OP_ENTERITER, 0, - append_elem(OP_LIST, mod(force_list(expr), OP_GREPSTART), - scalar(sv)))); + + + loop = (LOOP*)list(convert(OP_ENTERITER, iterflags, + append_elem(OP_LIST, expr, scalar(sv)))); assert(!loop->op_next); Renew(loop, 1, LOOP); loop->op_targ = padoff; - return newSTATEOP(0, label, newWHILEOP(flags, 1, loop, - newOP(OP_ITER, 0), block, cont)); + wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont); + copline = forline; + return newSTATEOP(0, label, wop); } OP* -newLOOPEX(type, label) -I32 type; -OP* label; +newLOOPEX(I32 type, OP *label) { - OP *op; + dTHR; + OP *o; if (type != OP_GOTO || label->op_type == OP_CONST) { - op = newPVOP(type, 0, savepv( - label->op_type == OP_CONST - ? SvPVx(((SVOP*)label)->op_sv, na) - : "" )); + /* "last()" means "last" */ + if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS)) + o = newOP(type, OPf_SPECIAL); + else { + o = newPVOP(type, 0, savepv(label->op_type == OP_CONST + ? SvPVx(((SVOP*)label)->op_sv, na) + : "")); + } op_free(label); } else { if (label->op_type == OP_ENTERSUB) label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN)); - op = newUNOP(type, OPf_STACKED, label); + o = newUNOP(type, OPf_STACKED, label); } hints |= HINT_BLOCK_SCOPE; - return op; + return o; } void -cv_undef(cv) -CV *cv; +cv_undef(CV *cv) { + dTHR; +#ifdef USE_THREADS + if (CvMUTEXP(cv)) { + MUTEX_DESTROY(CvMUTEXP(cv)); + Safefree(CvMUTEXP(cv)); + CvMUTEXP(cv) = 0; + } +#endif /* USE_THREADS */ + if (!CvXSUB(cv) && CvROOT(cv)) { +#ifdef USE_THREADS + if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr)) + croak("Can't undef active subroutine"); +#else if (CvDEPTH(cv)) croak("Can't undef active subroutine"); +#endif /* USE_THREADS */ ENTER; SAVESPTR(curpad); curpad = 0; - op_free(CvROOT(cv)); + if (!CvCLONED(cv)) + op_free(CvROOT(cv)); CvROOT(cv) = Nullop; - if (CvPADLIST(cv)) { - I32 i = AvFILL(CvPADLIST(cv)); + LEAVE; + } + SvPOK_off((SV*)cv); /* forget prototype */ + CvFLAGS(cv) = 0; + SvREFCNT_dec(CvGV(cv)); + CvGV(cv) = Nullgv; + SvREFCNT_dec(CvOUTSIDE(cv)); + CvOUTSIDE(cv) = Nullcv; + if (CvPADLIST(cv)) { + /* may be during global destruction */ + if (SvREFCNT(CvPADLIST(cv))) { + I32 i = AvFILLp(CvPADLIST(cv)); while (i >= 0) { SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE); - if (svp) - SvREFCNT_dec(*svp); + SV* sv = svp ? *svp : Nullsv; + if (!sv) + continue; + if (sv == (SV*)comppad_name) + comppad_name = Nullav; + else if (sv == (SV*)comppad) { + comppad = Nullav; + curpad = Null(SV**); + } + SvREFCNT_dec(sv); } SvREFCNT_dec((SV*)CvPADLIST(cv)); } - SvREFCNT_dec(CvGV(cv)); - LEAVE; + CvPADLIST(cv) = Nullav; } } -CV * -newSUB(floor,op,block) -I32 floor; -OP *op; -OP *block; +#ifdef DEBUG_CLOSURES +STATIC void +cv_dump(cv) +CV* cv; { - register CV *cv; - char *name = op ? SvPVx(cSVOP->op_sv, na) : "__ANON__"; - GV *gv = gv_fetchpv(name, GV_ADDMULTI, SVt_PVCV); + CV *outside = CvOUTSIDE(cv); + AV* padlist = CvPADLIST(cv); + AV* pad_name; + AV* pad; + SV** pname; + SV** ppad; + I32 ix; + + PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n", + cv, + (CvANON(cv) ? "ANON" + : (cv == main_cv) ? "MAIN" + : CvUNIQUE(outside) ? "UNIQUE" + : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), + outside, + (!outside ? "null" + : CvANON(outside) ? "ANON" + : (outside == main_cv) ? "MAIN" + : CvUNIQUE(outside) ? "UNIQUE" + : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); + + if (!padlist) + return; + + pad_name = (AV*)*av_fetch(padlist, 0, FALSE); + pad = (AV*)*av_fetch(padlist, 1, FALSE); + pname = AvARRAY(pad_name); + ppad = AvARRAY(pad); + + for (ix = 1; ix <= AvFILLp(pad_name); ix++) { + if (SvPOK(pname[ix])) + PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n", + ix, ppad[ix], + SvFAKE(pname[ix]) ? "FAKE " : "", + SvPVX(pname[ix]), + (long)I_32(SvNVX(pname[ix])), + (long)SvIVX(pname[ix])); + } +} +#endif /* DEBUG_CLOSURES */ + +STATIC CV * +cv_clone2(CV *proto, CV *outside) +{ + dTHR; AV* av; - char *s; I32 ix; + AV* protopadlist = CvPADLIST(proto); + AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE); + AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE); + SV** pname = AvARRAY(protopad_name); + SV** ppad = AvARRAY(protopad); + I32 fname = AvFILLp(protopad_name); + I32 fpad = AvFILLp(protopad); + AV* comppadlist; + CV* cv; + + assert(!CvUNIQUE(proto)); + + ENTER; + SAVESPTR(curpad); + SAVESPTR(comppad); + SAVESPTR(comppad_name); + SAVESPTR(compcv); + + cv = compcv = (CV*)NEWSV(1104,0); + sv_upgrade((SV *)cv, SvTYPE(proto)); + CvCLONED_on(cv); + if (CvANON(proto)) + CvANON_on(cv); + +#ifdef USE_THREADS + New(666, CvMUTEXP(cv), 1, perl_mutex); + MUTEX_INIT(CvMUTEXP(cv)); + CvOWNER(cv) = 0; +#endif /* USE_THREADS */ + CvFILEGV(cv) = CvFILEGV(proto); + CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto)); + CvSTASH(cv) = CvSTASH(proto); + CvROOT(cv) = CvROOT(proto); + CvSTART(cv) = CvSTART(proto); + if (outside) + CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside); + + if (SvPOK(proto)) + sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto)); + + comppad_name = newAV(); + for (ix = fname; ix >= 0; ix--) + av_store(comppad_name, ix, SvREFCNT_inc(pname[ix])); + + comppad = newAV(); + + comppadlist = newAV(); + AvREAL_off(comppadlist); + av_store(comppadlist, 0, (SV*)comppad_name); + av_store(comppadlist, 1, (SV*)comppad); + CvPADLIST(cv) = comppadlist; + av_fill(comppad, AvFILLp(protopad)); + curpad = AvARRAY(comppad); + + av = newAV(); /* will be @_ */ + av_extend(av, 0); + av_store(comppad, 0, (SV*)av); + AvFLAGS(av) = AVf_REIFY; + + for (ix = fpad; ix > 0; ix--) { + SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; + if (namesv && namesv != &sv_undef) { + char *name = SvPVX(namesv); /* XXX */ + if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */ + I32 off = pad_findlex(name, ix, SvIVX(namesv), + CvOUTSIDE(cv), cxstack_ix); + if (!off) + curpad[ix] = SvREFCNT_inc(ppad[ix]); + else if (off != ix) + croak("panic: cv_clone: %s", name); + } + else { /* our own lexical */ + SV* sv; + if (*name == '&') { + /* anon code -- we'll come back for it */ + sv = SvREFCNT_inc(ppad[ix]); + } + else if (*name == '@') + sv = (SV*)newAV(); + else if (*name == '%') + sv = (SV*)newHV(); + else + sv = NEWSV(0,0); + if (!SvPADBUSY(sv)) + SvPADMY_on(sv); + curpad[ix] = sv; + } + } + else { + SV* sv = NEWSV(0,0); + SvPADTMP_on(sv); + curpad[ix] = sv; + } + } + + /* Now that vars are all in place, clone nested closures. */ + + for (ix = fpad; ix > 0; ix--) { + SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; + if (namesv + && namesv != &sv_undef + && !(SvFLAGS(namesv) & SVf_FAKE) + && *SvPVX(namesv) == '&' + && CvCLONE(ppad[ix])) + { + CV *kid = cv_clone2((CV*)ppad[ix], cv); + SvREFCNT_dec(ppad[ix]); + CvCLONE_on(kid); + SvPADMY_on(kid); + curpad[ix] = (SV*)kid; + } + } + +#ifdef DEBUG_CLOSURES + PerlIO_printf(Perl_debug_log, "Cloned inside:\n"); + cv_dump(outside); + PerlIO_printf(Perl_debug_log, " from:\n"); + cv_dump(proto); + PerlIO_printf(Perl_debug_log, " to:\n"); + cv_dump(cv); +#endif + + LEAVE; + return cv; +} + +CV * +cv_clone(CV *proto) +{ + return cv_clone2(proto, CvOUTSIDE(proto)); +} + +void +cv_ckproto(CV *cv, GV *gv, char *p) +{ + if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) { + SV* msg = sv_newmortal(); + SV* name = Nullsv; + + if (gv) + gv_efullname3(name = sv_newmortal(), gv, Nullch); + sv_setpv(msg, "Prototype mismatch:"); + if (name) + sv_catpvf(msg, " sub %_", name); + if (SvPOK(cv)) + sv_catpvf(msg, " (%s)", SvPVX(cv)); + sv_catpv(msg, " vs "); + if (p) + sv_catpvf(msg, "(%s)", p); + else + sv_catpv(msg, "none"); + warn("%_", msg); + } +} + +SV * +cv_const_sv(CV *cv) +{ + if (!cv || !SvPOK(cv) || SvCUR(cv)) + return Nullsv; + return op_const_sv(CvSTART(cv), cv); +} + +SV * +op_const_sv(OP *o, CV *cv) +{ + SV *sv = Nullsv; - if (op) + if(!o) + return Nullsv; + + if(o->op_type == OP_LINESEQ && cLISTOPo->op_first) + o = cLISTOPo->op_first->op_sibling; + + for (; o; o = o->op_next) { + OPCODE type = o->op_type; + + if(sv && o->op_next == o) + return sv; + if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK) + continue; + if (type == OP_LEAVESUB || type == OP_RETURN) + break; + if (sv) + return Nullsv; + if (type == OP_CONST) + sv = cSVOPo->op_sv; + else if (type == OP_PADSV && cv) { + AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]); + sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv; + if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1)) + return Nullsv; + } + else + return Nullsv; + } + if (sv) + SvREADONLY_on(sv); + return sv; +} + +CV * +newSUB(I32 floor, OP *o, OP *proto, OP *block) +{ + dTHR; + char *name = o ? SvPVx(cSVOPo->op_sv, na) : Nullch; + GV *gv = gv_fetchpv(name ? name : "__ANON__", + GV_ADDMULTI | (block ? 0 : GV_NOINIT), SVt_PVCV); + char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, na) : Nullch; + register CV *cv=0; + I32 ix; + + if (o) + SAVEFREEOP(o); + if (proto) + SAVEFREEOP(proto); + + if (SvTYPE(gv) != SVt_PVGV) { /* Prototype now, and had + maximum a prototype before. */ + if (SvTYPE(gv) > SVt_NULL) { + if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)) + warn("Runaway prototype"); + cv_ckproto((CV*)gv, NULL, ps); + } + if (ps) + sv_setpv((SV*)gv, ps); + else + sv_setiv((SV*)gv, -1); + SvREFCNT_dec(compcv); + cv = compcv = NULL; sub_generation++; - if (cv = GvCV(gv)) { - if (GvCVGEN(gv)) - cv = 0; /* just a cached method */ - else if (CvROOT(cv)) { /* already defined? */ - if (dowarn) { - line_t oldline = curcop->cop_line; + goto noblock; + } + if (!name || GvCVGEN(gv)) + cv = Nullcv; + else if (cv = GvCV(gv)) { + cv_ckproto(cv, gv, ps); + /* already defined (or promised)? */ + if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) { + SV* const_sv; + bool const_changed = TRUE; + if (!block) { + /* just a "sub foo;" when &foo is already defined */ + SAVEFREESV(compcv); + goto done; + } + /* ahem, death to those who redefine active sort subs */ + if (curstackinfo->si_type == SI_SORT && sortcop == CvSTART(cv)) + croak("Can't redefine active sort subroutine %s", name); + if(const_sv = cv_const_sv(cv)) + const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv)); + if ((const_sv && const_changed) || dowarn && !(CvGV(cv) && GvSTASH(CvGV(cv)) + && HvNAME(GvSTASH(CvGV(cv))) + && strEQ(HvNAME(GvSTASH(CvGV(cv))), + "autouse"))) { + line_t oldline = curcop->cop_line; curcop->cop_line = copline; - warn("Subroutine %s redefined",name); + warn(const_sv ? "Constant subroutine %s redefined" + : "Subroutine %s redefined", name); curcop->cop_line = oldline; } SvREFCNT_dec(cv); - cv = 0; + cv = Nullcv; } } if (cv) { /* must reuse cv if autoloaded */ - assert(SvREFCNT(CvGV(cv)) > 1); - SvREFCNT_dec(CvGV(cv)); + cv_undef(cv); + CvFLAGS(cv) = CvFLAGS(compcv); + CvOUTSIDE(cv) = CvOUTSIDE(compcv); + CvOUTSIDE(compcv) = 0; + CvPADLIST(cv) = CvPADLIST(compcv); + CvPADLIST(compcv) = 0; + if (SvREFCNT(compcv) > 1) /* XXX Make closures transit through stub. */ + CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc((SV*)cv); + SvREFCNT_dec(compcv); } else { - cv = (CV*)NEWSV(1104,0); - sv_upgrade((SV *)cv, SVt_PVCV); + cv = compcv; + if (name) { + GvCV(gv) = cv; + GvCVGEN(gv) = 0; + sub_generation++; + } } - GvCV(gv) = cv; - GvCVGEN(gv) = 0; + CvGV(cv) = (GV*)SvREFCNT_inc(gv); CvFILEGV(cv) = curcop->cop_filegv; - CvGV(cv) = SvREFCNT_inc(gv); CvSTASH(cv) = curstash; - +#ifdef USE_THREADS + CvOWNER(cv) = 0; + New(666, CvMUTEXP(cv), 1, perl_mutex); + MUTEX_INIT(CvMUTEXP(cv)); +#endif /* USE_THREADS */ + + if (ps) + sv_setpv((SV*)cv, ps); + + if (error_count) { + op_free(block); + block = Nullop; + if (name) { + char *s = strrchr(name, ':'); + s = s ? s+1 : name; + if (strEQ(s, "BEGIN")) { + char *not_safe = + "BEGIN not safe after errors--compilation aborted"; + if (in_eval & 4) + croak(not_safe); + else { + /* force display of errors found but not reported */ + sv_catpv(ERRSV, not_safe); + croak("%s", SvPVx(ERRSV, na)); + } + } + } + } if (!block) { - CvROOT(cv) = 0; - op_free(op); + noblock: copline = NOLINE; LEAVE_SCOPE(floor); return cv; } - av = newAV(); /* Will be @_ */ - av_extend(av, 0); - av_store(comppad, 0, (SV*)av); - AvFLAGS(av) = AVf_REIFY; + if (AvFILLp(comppad_name) < AvFILLp(comppad)) + av_store(comppad_name, AvFILLp(comppad), Nullsv); - for (ix = AvFILL(comppad); ix > 0; ix--) { - if (!SvPADMY(curpad[ix])) - SvPADTMP_on(curpad[ix]); + if (CvCLONE(cv)) { + SV **namep = AvARRAY(comppad_name); + for (ix = AvFILLp(comppad); ix > 0; ix--) { + SV *namesv; + + if (SvIMMORTAL(curpad[ix])) + continue; + /* + * The only things that a clonable function needs in its + * pad are references to outer lexicals and anonymous subs. + * The rest are created anew during cloning. + */ + if (!((namesv = namep[ix]) != Nullsv && + namesv != &sv_undef && + (SvFAKE(namesv) || + *SvPVX(namesv) == '&'))) + { + SvREFCNT_dec(curpad[ix]); + curpad[ix] = Nullsv; + } + } } + else { + AV *av = newAV(); /* Will be @_ */ + av_extend(av, 0); + av_store(comppad, 0, (SV*)av); + AvFLAGS(av) = AVf_REIFY; - av = newAV(); - AvREAL_off(av); - if (AvFILL(comppad_name) < AvFILL(comppad)) - av_store(comppad_name, AvFILL(comppad), Nullsv); - av_store(av, 0, SvREFCNT_inc((SV*)comppad_name)); - av_store(av, 1, SvREFCNT_inc((SV*)comppad)); - AvFILL(av) = 1; - CvPADLIST(cv) = av; + for (ix = AvFILLp(comppad); ix > 0; ix--) { + if (SvIMMORTAL(curpad[ix])) + continue; + if (!SvPADMY(curpad[ix])) + SvPADTMP_on(curpad[ix]); + } + } CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block)); CvSTART(cv) = LINKLIST(CvROOT(cv)); CvROOT(cv)->op_next = 0; peep(CvSTART(cv)); - if (s = strrchr(name,':')) - s++; - else - s = name; - if (strEQ(s, "BEGIN")) { - line_t oldline = compiling.cop_line; - ENTER; - SAVESPTR(compiling.cop_filegv); - SAVEI32(perldb); - if (!beginav) - beginav = newAV(); - av_push(beginav, (SV *)cv); - DEBUG_x( dump_sub(gv) ); - rs = nrs; - rslen = nrslen; - rschar = nrschar; - rspara = (nrslen == 2); - GvCV(gv) = 0; - calllist(beginav); - rs = "\n"; - rslen = 1; - rschar = '\n'; - rspara = 0; - curcop = &compiling; - curcop->cop_line = oldline; /* might have recursed to yylex */ - LEAVE; + if (name) { + char *s; + + if (PERLDB_SUBLINE && curstash != debstash) { + SV *sv = NEWSV(0,0); + SV *tmpstr = sv_newmortal(); + GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV); + CV *cv; + HV *hv; + + sv_setpvf(sv, "%_:%ld-%ld", + GvSV(curcop->cop_filegv), + (long)subline, (long)curcop->cop_line); + gv_efullname3(tmpstr, gv, Nullch); + hv_store(GvHV(DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0); + hv = GvHVn(db_postponed); + if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr)) + && (cv = GvCV(db_postponed))) { + dSP; + PUSHMARK(SP); + XPUSHs(tmpstr); + PUTBACK; + perl_call_sv((SV*)cv, G_DISCARD); + } + } + + if ((s = strrchr(name,':'))) + s++; + else + s = name; + if (strEQ(s, "BEGIN")) { + I32 oldscope = scopestack_ix; + ENTER; + SAVESPTR(compiling.cop_filegv); + SAVEI16(compiling.cop_line); + save_svref(&rs); + sv_setsv(rs, nrs); + + if (!beginav) + beginav = newAV(); + DEBUG_x( dump_sub(gv) ); + av_push(beginav, (SV *)cv); + GvCV(gv) = 0; + call_list(oldscope, beginav); + + curcop = &compiling; + LEAVE; + } + else if (strEQ(s, "END") && !error_count) { + if (!endav) + endav = newAV(); + av_unshift(endav, 1); + av_store(endav, 0, (SV *)cv); + GvCV(gv) = 0; + } + else if (strEQ(s, "INIT") && !error_count) { + if (!initav) + initav = newAV(); + av_push(initav, SvREFCNT_inc(cv)); + } } - else if (strEQ(s, "END")) { - if (!endav) - endav = newAV(); - av_unshift(endav, 1); - av_store(endav, 0, SvREFCNT_inc(cv)); - } - if (perldb && curstash != debstash) { - SV *sv; - SV *tmpstr = sv_newmortal(); - - sprintf(buf,"%s:%ld",SvPVX(GvSV(curcop->cop_filegv)), (long)subline); - sv = newSVpv(buf,0); - sv_catpv(sv,"-"); - sprintf(buf,"%ld",(long)curcop->cop_line); - sv_catpv(sv,buf); - gv_efullname(tmpstr,gv); - hv_store(GvHV(DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0); - } - op_free(op); + + done: copline = NOLINE; LEAVE_SCOPE(floor); - if (!op) - GvCV(gv) = 0; /* Will remember in SVOP instead. */ return cv; } -#ifdef DEPRECATED -CV * -newXSUB(name, ix, subaddr, filename) -char *name; -I32 ix; -I32 (*subaddr)(); -char *filename; -{ - CV* cv = newXS(name, (void(*)())subaddr, filename); - CvOLDSTYLE(cv) = TRUE; - CvXSUBANY(cv).any_i32 = ix; - return cv; +void +newCONSTSUB(HV *stash, char *name, SV *sv) +{ + dTHR; + U32 oldhints = hints; + HV *old_cop_stash = curcop->cop_stash; + HV *old_curstash = curstash; + line_t oldline = curcop->cop_line; + curcop->cop_line = copline; + + hints &= ~HINT_BLOCK_SCOPE; + if(stash) + curstash = curcop->cop_stash = stash; + + newSUB( + start_subparse(FALSE, 0), + newSVOP(OP_CONST, 0, newSVpv(name,0)), + newSVOP(OP_CONST, 0, &sv_no), /* SvPV(&sv_no) == "" -- GMB */ + newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv)) + ); + + hints = oldhints; + curcop->cop_stash = old_cop_stash; + curstash = old_curstash; + curcop->cop_line = oldline; } -#endif CV * -newXS(name, subaddr, filename) -char *name; -void (*subaddr) _((CV*)); -char *filename; +newXS(char *name, void (*subaddr) (CV * _CPERLproto), char *filename) { + dTHR; + GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV); register CV *cv; - GV *gv = gv_fetchpv((name ? name : "__ANON__"), GV_ADDMULTI, SVt_PVCV); - char *s; - if (name) - sub_generation++; - if (cv = GvCV(gv)) { - if (GvCVGEN(gv)) - cv = 0; /* just a cached method */ - else if (CvROOT(cv)) { /* already defined? */ - if (dowarn) { + if (cv = (name ? GvCV(gv) : Nullcv)) { + if (GvCVGEN(gv)) { + /* just a cached method */ + SvREFCNT_dec(cv); + cv = 0; + } + else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) { + /* already defined (or promised) */ + if (dowarn && !(CvGV(cv) && GvSTASH(CvGV(cv)) + && HvNAME(GvSTASH(CvGV(cv))) + && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) { line_t oldline = curcop->cop_line; - curcop->cop_line = copline; warn("Subroutine %s redefined",name); curcop->cop_line = oldline; @@ -2731,59 +3713,73 @@ char *filename; cv = 0; } } - if (cv) { /* must reuse cv if autoloaded */ - assert(SvREFCNT(CvGV(cv)) > 1); - SvREFCNT_dec(CvGV(cv)); - } + + if (cv) /* must reuse cv if autoloaded */ + cv_undef(cv); else { cv = (CV*)NEWSV(1105,0); sv_upgrade((SV *)cv, SVt_PVCV); + if (name) { + GvCV(gv) = cv; + GvCVGEN(gv) = 0; + sub_generation++; + } } - GvCV(gv) = cv; - CvGV(cv) = SvREFCNT_inc(gv); - GvCVGEN(gv) = 0; + CvGV(cv) = (GV*)SvREFCNT_inc(gv); +#ifdef USE_THREADS + New(666, CvMUTEXP(cv), 1, perl_mutex); + MUTEX_INIT(CvMUTEXP(cv)); + CvOWNER(cv) = 0; +#endif /* USE_THREADS */ CvFILEGV(cv) = gv_fetchfile(filename); CvXSUB(cv) = subaddr; - if (!name) - s = "__ANON__"; - else if (s = strrchr(name,':')) - s++; + + if (name) { + char *s = strrchr(name,':'); + if (s) + s++; + else + s = name; + if (strEQ(s, "BEGIN")) { + if (!beginav) + beginav = newAV(); + av_push(beginav, (SV *)cv); + GvCV(gv) = 0; + } + else if (strEQ(s, "END")) { + if (!endav) + endav = newAV(); + av_unshift(endav, 1); + av_store(endav, 0, (SV *)cv); + GvCV(gv) = 0; + } + else if (strEQ(s, "INIT")) { + if (!initav) + initav = newAV(); + av_push(initav, (SV *)cv); + } + } else - s = name; - if (strEQ(s, "BEGIN")) { - if (!beginav) - beginav = newAV(); - av_push(beginav, SvREFCNT_inc(gv)); - } - else if (strEQ(s, "END")) { - if (!endav) - endav = newAV(); - av_unshift(endav, 1); - av_store(endav, 0, SvREFCNT_inc(gv)); - } - if (!name) - GvCV(gv) = 0; /* Will remember elsewhere instead. */ + CvANON_on(cv); + return cv; } void -newFORM(floor,op,block) -I32 floor; -OP *op; -OP *block; +newFORM(I32 floor, OP *o, OP *block) { + dTHR; register CV *cv; char *name; GV *gv; - AV* av; I32 ix; - if (op) - name = SvPVx(cSVOP->op_sv, na); + if (o) + name = SvPVx(cSVOPo->op_sv, na); else name = "STDOUT"; gv = gv_fetchpv(name,TRUE, SVt_PVFM); - SvMULTI_on(gv); + GvMULTI_on(gv); if (cv = GvFORM(gv)) { if (dowarn) { line_t oldline = curcop->cop_line; @@ -2794,79 +3790,48 @@ OP *block; } SvREFCNT_dec(cv); } - cv = (CV*)NEWSV(1106,0); - sv_upgrade((SV *)cv, SVt_PVFM); + cv = compcv; GvFORM(gv) = cv; - CvGV(cv) = SvREFCNT_inc(gv); + CvGV(cv) = (GV*)SvREFCNT_inc(gv); CvFILEGV(cv) = curcop->cop_filegv; - for (ix = AvFILL(comppad); ix > 0; ix--) { - if (!SvPADMY(curpad[ix])) + for (ix = AvFILLp(comppad); ix > 0; ix--) { + if (!SvPADMY(curpad[ix]) && !SvIMMORTAL(curpad[ix])) SvPADTMP_on(curpad[ix]); } - CvPADLIST(cv) = av = newAV(); - AvREAL_off(av); - av_store(av, 1, SvREFCNT_inc((SV*)comppad)); - AvFILL(av) = 1; - CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block)); CvSTART(cv) = LINKLIST(CvROOT(cv)); CvROOT(cv)->op_next = 0; peep(CvSTART(cv)); - FmLINES(cv) = 0; - op_free(op); + op_free(o); copline = NOLINE; LEAVE_SCOPE(floor); } OP * -newMETHOD(ref,name) -OP *ref; -OP *name; -{ - LOGOP* mop; - Newz(1101, mop, 1, LOGOP); - mop->op_type = OP_METHOD; - mop->op_ppaddr = ppaddr[OP_METHOD]; - mop->op_first = scalar(ref); - mop->op_flags |= OPf_KIDS; - mop->op_private = 1; - mop->op_other = LINKLIST(name); - mop->op_targ = pad_alloc(OP_METHOD, SVs_PADTMP); - mop->op_next = LINKLIST(ref); - ref->op_next = (OP*)mop; - return scalar((OP*)mop); -} - -OP * -newANONLIST(op) -OP* op; +newANONLIST(OP *o) { return newUNOP(OP_REFGEN, 0, - mod(list(convert(OP_ANONLIST, 0, op)), OP_REFGEN)); + mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN)); } OP * -newANONHASH(op) -OP* op; +newANONHASH(OP *o) { return newUNOP(OP_REFGEN, 0, - mod(list(convert(OP_ANONHASH, 0, op)), OP_REFGEN)); + mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN)); } OP * -newANONSUB(floor, block) -I32 floor; -OP *block; +newANONSUB(I32 floor, OP *proto, OP *block) { return newUNOP(OP_REFGEN, 0, - newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, block))); + newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block))); } OP * -oopsAV(o) -OP *o; +oopsAV(OP *o) { switch (o->op_type) { case OP_PADSV: @@ -2888,8 +3853,7 @@ OP *o; } OP * -oopsHV(o) -OP *o; +oopsHV(OP *o) { switch (o->op_type) { case OP_PADSV: @@ -2913,8 +3877,7 @@ OP *o; } OP * -newAVREF(o) -OP *o; +newAVREF(OP *o) { if (o->op_type == OP_PADANY) { o->op_type = OP_PADAV; @@ -2925,18 +3888,15 @@ OP *o; } OP * -newGVREF(type,o) -I32 type; -OP *o; +newGVREF(I32 type, OP *o) { if (type == OP_MAPSTART) return newUNOP(OP_NULL, 0, o); - return newUNOP(OP_RV2GV, 0, o); + return ref(newUNOP(OP_RV2GV, OPf_REF, o), type); } OP * -newHVREF(o) -OP *o; +newHVREF(OP *o) { if (o->op_type == OP_PADANY) { o->op_type = OP_PADHV; @@ -2947,8 +3907,7 @@ OP *o; } OP * -oopsCV(o) -OP *o; +oopsCV(OP *o) { croak("NOT IMPL LINE %d",__LINE__); /* STUB */ @@ -2956,109 +3915,138 @@ OP *o; } OP * -newCVREF(o) -OP *o; +newCVREF(I32 flags, OP *o) { - return newUNOP(OP_RV2CV, 0, scalar(o)); + return newUNOP(OP_RV2CV, flags, scalar(o)); } OP * -newSVREF(o) -OP *o; +newSVREF(OP *o) { if (o->op_type == OP_PADANY) { o->op_type = OP_PADSV; o->op_ppaddr = ppaddr[OP_PADSV]; return o; } + else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) { + o->op_flags |= OPpDONE_SVREF; + return o; + } return newUNOP(OP_RV2SV, 0, scalar(o)); } /* Check routines. */ OP * -ck_concat(op) -OP *op; +ck_anoncode(OP *o) +{ + PADOFFSET ix; + SV* name; + + name = NEWSV(1106,0); + sv_upgrade(name, SVt_PVNV); + sv_setpvn(name, "&", 1); + SvIVX(name) = -1; + SvNVX(name) = 1; + ix = pad_alloc(o->op_type, SVs_PADMY); + av_store(comppad_name, ix, name); + av_store(comppad, ix, cSVOPo->op_sv); + SvPADMY_on(cSVOPo->op_sv); + cSVOPo->op_sv = Nullsv; + cSVOPo->op_targ = ix; + return o; +} + +OP * +ck_bitop(OP *o) +{ + o->op_private = hints; + return o; +} + +OP * +ck_concat(OP *o) { - if (cUNOP->op_first->op_type == OP_CONCAT) - op->op_flags |= OPf_STACKED; - return op; + if (cUNOPo->op_first->op_type == OP_CONCAT) + o->op_flags |= OPf_STACKED; + return o; } OP * -ck_spair(op) -OP *op; +ck_spair(OP *o) { - if (op->op_flags & OPf_KIDS) { + if (o->op_flags & OPf_KIDS) { OP* newop; OP* kid; - op = modkids(ck_fun(op), op->op_type); - kid = cUNOP->op_first; + OPCODE type = o->op_type; + o = modkids(ck_fun(o), type); + kid = cUNOPo->op_first; newop = kUNOP->op_first->op_sibling; if (newop && (newop->op_sibling || !(opargs[newop->op_type] & OA_RETSCALAR) || newop->op_type == OP_PADAV || newop->op_type == OP_PADHV || newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) { - - return op; + + return o; } op_free(kUNOP->op_first); kUNOP->op_first = newop; } - op->op_ppaddr = ppaddr[++op->op_type]; - return ck_fun(op); + o->op_ppaddr = ppaddr[++o->op_type]; + return ck_fun(o); } OP * -ck_delete(op) -OP *op; +ck_delete(OP *o) { - op = ck_fun(op); - if (op->op_flags & OPf_KIDS) { - OP *kid = cUNOP->op_first; - if (kid->op_type != OP_HELEM) - croak("%s argument is not a HASH element", op_name[op->op_type]); + o = ck_fun(o); + o->op_private = 0; + if (o->op_flags & OPf_KIDS) { + OP *kid = cUNOPo->op_first; + if (kid->op_type == OP_HSLICE) + o->op_private |= OPpSLICE; + else if (kid->op_type != OP_HELEM) + croak("%s argument is not a HASH element or slice", + op_desc[o->op_type]); null(kid); } - return op; + return o; } OP * -ck_eof(op) -OP *op; +ck_eof(OP *o) { - I32 type = op->op_type; + I32 type = o->op_type; - if (op->op_flags & OPf_KIDS) { - if (cLISTOP->op_first->op_type == OP_STUB) { - op_free(op); - op = newUNOP(type, OPf_SPECIAL, - newGVOP(OP_GV, 0, gv_fetchpv("main'ARGV", TRUE, SVt_PVAV))); + if (o->op_flags & OPf_KIDS) { + if (cLISTOPo->op_first->op_type == OP_STUB) { + op_free(o); + o = newUNOP(type, OPf_SPECIAL, + newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV))); } - return ck_fun(op); + return ck_fun(o); } - return op; + return o; } OP * -ck_eval(op) -OP *op; +ck_eval(OP *o) { hints |= HINT_BLOCK_SCOPE; - if (op->op_flags & OPf_KIDS) { - SVOP *kid = (SVOP*)cUNOP->op_first; + if (o->op_flags & OPf_KIDS) { + SVOP *kid = (SVOP*)cUNOPo->op_first; if (!kid) { - op->op_flags &= ~OPf_KIDS; - null(op); + o->op_flags &= ~OPf_KIDS; + null(o); } else if (kid->op_type == OP_LINESEQ) { LOGOP *enter; - kid->op_next = op->op_next; - cUNOP->op_first = 0; - op_free(op); + kid->op_next = o->op_next; + cUNOPo->op_first = 0; + op_free(o); Newz(1101, enter, 1, LOGOP); enter->op_type = OP_ENTERTRY; @@ -3068,40 +4056,53 @@ OP *op; /* establish postfix order */ enter->op_next = (OP*)enter; - op = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid); - op->op_type = OP_LEAVETRY; - op->op_ppaddr = ppaddr[OP_LEAVETRY]; - enter->op_other = op; - return op; + o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid); + o->op_type = OP_LEAVETRY; + o->op_ppaddr = ppaddr[OP_LEAVETRY]; + enter->op_other = o; + return o; } + else + scalar((OP*)kid); } else { - op_free(op); - op = newUNOP(OP_ENTEREVAL, 0, newSVREF(newGVOP(OP_GV, 0, defgv))); + op_free(o); + o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP()); } - op->op_targ = (PADOFFSET)hints; - return op; + o->op_targ = (PADOFFSET)hints; + return o; } OP * -ck_exec(op) -OP *op; +ck_exec(OP *o) { OP *kid; - if (op->op_flags & OPf_STACKED) { - op = ck_fun(op); - kid = cUNOP->op_first->op_sibling; + if (o->op_flags & OPf_STACKED) { + o = ck_fun(o); + kid = cUNOPo->op_first->op_sibling; if (kid->op_type == OP_RV2GV) null(kid); } else - op = listkids(op); - return op; + o = listkids(o); + return o; +} + +OP * +ck_exists(OP *o) +{ + o = ck_fun(o); + if (o->op_flags & OPf_KIDS) { + OP *kid = cUNOPo->op_first; + if (kid->op_type != OP_HELEM) + croak("%s argument is not a HASH element", op_desc[o->op_type]); + null(kid); + } + return o; } OP * -ck_gvconst(o) -register OP *o; +ck_gvconst(register OP *o) { o = fold_constants(o); if (o->op_type == OP_CONST) @@ -3110,92 +4111,118 @@ register OP *o; } OP * -ck_rvconst(op) -register OP *op; +ck_rvconst(register OP *o) { - SVOP *kid = (SVOP*)cUNOP->op_first; - int iscv = (op->op_type==OP_RV2CV)*2; + dTHR; + SVOP *kid = (SVOP*)cUNOPo->op_first; - op->op_private = (hints & HINT_STRICT_REFS); + o->op_private |= (hints & HINT_STRICT_REFS); if (kid->op_type == OP_CONST) { - GV *gv = 0; - kid->op_type = OP_GV; - for (gv = 0; !gv; iscv++) { - gv = gv_fetchpv(SvPVx(kid->op_sv, na), - iscv, + char *name; + int iscv; + GV *gv; + + name = SvPV(kid->op_sv, na); + if ((hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) { + char *badthing = Nullch; + switch (o->op_type) { + case OP_RV2SV: + badthing = "a SCALAR"; + break; + case OP_RV2AV: + badthing = "an ARRAY"; + break; + case OP_RV2HV: + badthing = "a HASH"; + break; + } + if (badthing) + croak( + "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use", + name, badthing); + } + /* + * This is a little tricky. We only want to add the symbol if we + * didn't add it in the lexer. Otherwise we get duplicate strict + * warnings. But if we didn't add it in the lexer, we must at + * least pretend like we wanted to add it even if it existed before, + * or we get possible typo warnings. OPpCONST_ENTERED says + * whether the lexer already added THIS instance of this symbol. + */ + iscv = (o->op_type == OP_RV2CV) * 2; + do { + gv = gv_fetchpv(name, + iscv | !(kid->op_private & OPpCONST_ENTERED), iscv ? SVt_PVCV - : op->op_type == OP_RV2SV + : o->op_type == OP_RV2SV ? SVt_PV - : op->op_type == OP_RV2AV + : o->op_type == OP_RV2AV ? SVt_PVAV - : op->op_type == OP_RV2HV + : o->op_type == OP_RV2HV ? SVt_PVHV : SVt_PVGV); + } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++); + if (gv) { + kid->op_type = OP_GV; + SvREFCNT_dec(kid->op_sv); + kid->op_sv = SvREFCNT_inc(gv); } - kid->op_sv = SvREFCNT_inc(gv); } - return op; -} - -OP * -ck_formline(op) -OP *op; -{ - return ck_fun(op); + return o; } OP * -ck_ftst(op) -OP *op; +ck_ftst(OP *o) { - I32 type = op->op_type; + dTHR; + I32 type = o->op_type; - if (op->op_flags & OPf_REF) - return op; + if (o->op_flags & OPf_REF) + return o; - if (op->op_flags & OPf_KIDS) { - SVOP *kid = (SVOP*)cUNOP->op_first; + if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) { + SVOP *kid = (SVOP*)cUNOPo->op_first; if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) { OP *newop = newGVOP(type, OPf_REF, gv_fetchpv(SvPVx(kid->op_sv, na), TRUE, SVt_PVIO)); - op_free(op); + op_free(o); return newop; } } else { - op_free(op); + op_free(o); if (type == OP_FTTTY) - return newGVOP(type, OPf_REF, gv_fetchpv("main'STDIN", TRUE, + return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE, SVt_PVIO)); else - return newUNOP(type, 0, newSVREF(newGVOP(OP_GV, 0, defgv))); + return newUNOP(type, 0, newDEFSVOP()); } - return op; + return o; } OP * -ck_fun(op) -OP *op; +ck_fun(OP *o) { + dTHR; register OP *kid; OP **tokid; OP *sibl; I32 numargs = 0; - int type = op->op_type; + int type = o->op_type; register I32 oa = opargs[type] >> OASHIFT; - - if (op->op_flags & OPf_STACKED) { + + if (o->op_flags & OPf_STACKED) { if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL)) oa &= ~OA_OPTIONAL; else - return no_fh_allowed(op); + return no_fh_allowed(o); } - if (op->op_flags & OPf_KIDS) { - tokid = &cLISTOP->op_first; - kid = cLISTOP->op_first; + if (o->op_flags & OPf_KIDS) { + tokid = &cLISTOPo->op_first; + kid = cLISTOPo->op_first; if (kid->op_type == OP_PUSHMARK || kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK) { @@ -3203,7 +4230,7 @@ OP *op; kid = kid->op_sibling; } if (!kid && opargs[type] & OA_DEFGV) - *tokid = kid = newSVREF(newGVOP(OP_GV, 0, defgv)); + *tokid = kid = newDEFSVOP(); while (oa && kid) { numargs++; @@ -3227,15 +4254,15 @@ OP *op; OP *newop = newAVREF(newGVOP(OP_GV, 0, gv_fetchpv(name, TRUE, SVt_PVAV) )); if (dowarn) - warn("Array @%s missing the @ in argument %d of %s()", - name, numargs, op_name[type]); + warn("Array @%s missing the @ in argument %ld of %s()", + name, (long)numargs, op_desc[type]); op_free(kid); kid = newop; kid->op_sibling = sibl; *tokid = kid; } else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV) - bad_type(numargs, "array", op, kid); + bad_type(numargs, "array", op_desc[o->op_type], kid); mod(kid, type); break; case OA_HVREF: @@ -3245,15 +4272,15 @@ OP *op; OP *newop = newHVREF(newGVOP(OP_GV, 0, gv_fetchpv(name, TRUE, SVt_PVHV) )); if (dowarn) - warn("Hash %%%s missing the %% in argument %d of %s()", - name, numargs, op_name[type]); + warn("Hash %%%s missing the %% in argument %ld of %s()", + name, (long)numargs, op_desc[type]); op_free(kid); kid = newop; kid->op_sibling = sibl; *tokid = kid; } else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV) - bad_type(numargs, "hash", op, kid); + bad_type(numargs, "hash", op_desc[o->op_type], kid); mod(kid, type); break; case OA_CVREF: @@ -3294,81 +4321,105 @@ OP *op; tokid = &kid->op_sibling; kid = kid->op_sibling; } - op->op_private = numargs; + o->op_private |= numargs; if (kid) - return too_many_arguments(op); - listkids(op); + return too_many_arguments(o,op_desc[o->op_type]); + listkids(o); } else if (opargs[type] & OA_DEFGV) { - op_free(op); - return newUNOP(type, 0, newSVREF(newGVOP(OP_GV, 0, defgv))); + op_free(o); + return newUNOP(type, 0, newDEFSVOP()); } if (oa) { while (oa & OA_OPTIONAL) oa >>= 4; if (oa && oa != OA_LIST) - return too_few_arguments(op); + return too_few_arguments(o,op_desc[o->op_type]); } - return op; + return o; } OP * -ck_glob(op) -OP *op; +ck_glob(OP *o) { - GV *gv = newGVgen("main"); + GV *gv; + + if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling) + append_elem(OP_GLOB, o, newDEFSVOP()); + + if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv))) + gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV); + + if (gv && GvIMPORTED_CV(gv)) { + static int glob_index; + + append_elem(OP_GLOB, o, + newSVOP(OP_CONST, 0, newSViv(glob_index++))); + o->op_type = OP_LIST; + o->op_ppaddr = ppaddr[OP_LIST]; + cLISTOPo->op_first->op_type = OP_PUSHMARK; + cLISTOPo->op_first->op_ppaddr = ppaddr[OP_PUSHMARK]; + o = newUNOP(OP_ENTERSUB, OPf_STACKED, + append_elem(OP_LIST, o, + scalar(newUNOP(OP_RV2CV, 0, + newGVOP(OP_GV, 0, gv))))); + o = newUNOP(OP_NULL, 0, ck_subr(o)); + o->op_targ = OP_GLOB; /* hint at what it used to be */ + return o; + } + gv = newGVgen("main"); gv_IOadd(gv); - append_elem(OP_GLOB, op, newGVOP(OP_GV, 0, gv)); - scalarkids(op); - return ck_fun(op); + append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv)); + scalarkids(o); + return ck_fun(o); } OP * -ck_grep(op) -OP *op; +ck_grep(OP *o) { LOGOP *gwop; OP *kid; - OPCODE type = op->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE; + OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE; - op->op_ppaddr = ppaddr[OP_GREPSTART]; + o->op_ppaddr = ppaddr[OP_GREPSTART]; Newz(1101, gwop, 1, LOGOP); - - if (op->op_flags & OPf_STACKED) { + + if (o->op_flags & OPf_STACKED) { OP* k; - op = ck_sort(op); - for (k = cLISTOP->op_first->op_sibling->op_next; k; k = k->op_next) { + o = ck_sort(o); + kid = cLISTOPo->op_first->op_sibling; + for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) { kid = k; } kid->op_next = (OP*)gwop; - op->op_flags &= ~OPf_STACKED; + o->op_flags &= ~OPf_STACKED; } - kid = cLISTOP->op_first->op_sibling; + kid = cLISTOPo->op_first->op_sibling; if (type == OP_MAPWHILE) list(kid); else scalar(kid); - op = ck_fun(op); + o = ck_fun(o); if (error_count) - return op; - kid = cLISTOP->op_first->op_sibling; + return o; + kid = cLISTOPo->op_first->op_sibling; if (kid->op_type != OP_NULL) croak("panic: ck_grep"); kid = kUNOP->op_first; gwop->op_type = type; gwop->op_ppaddr = ppaddr[type]; - gwop->op_first = listkids(op); + gwop->op_first = listkids(o); gwop->op_flags |= OPf_KIDS; gwop->op_private = 1; gwop->op_other = LINKLIST(kid); gwop->op_targ = pad_alloc(type, SVs_PADTMP); kid->op_next = (OP*)gwop; - kid = cLISTOP->op_first->op_sibling; + kid = cLISTOPo->op_first->op_sibling; if (!kid || !kid->op_sibling) - return too_few_arguments(op); + return too_few_arguments(o,op_desc[o->op_type]); for (kid = kid->op_sibling; kid; kid = kid->op_sibling) mod(kid, OP_GREPSTART); @@ -3376,167 +4427,215 @@ OP *op; } OP * -ck_index(op) -OP *op; +ck_index(OP *o) { - if (op->op_flags & OPf_KIDS) { - OP *kid = cLISTOP->op_first->op_sibling; /* get past pushmark */ + if (o->op_flags & OPf_KIDS) { + OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ if (kid && kid->op_type == OP_CONST) fbm_compile(((SVOP*)kid)->op_sv, 0); } - return ck_fun(op); + return ck_fun(o); } OP * -ck_lengthconst(op) -OP *op; +ck_lengthconst(OP *o) { /* XXX length optimization goes here */ - return ck_fun(op); + return ck_fun(o); } OP * -ck_lfun(op) -OP *op; +ck_lfun(OP *o) { - return modkids(ck_fun(op), op->op_type); + OPCODE type = o->op_type; + return modkids(ck_fun(o), type); } OP * -ck_rfun(op) -OP *op; +ck_rfun(OP *o) { - return refkids(ck_fun(op), op->op_type); + OPCODE type = o->op_type; + return refkids(ck_fun(o), type); } OP * -ck_listiob(op) -OP *op; +ck_listiob(OP *o) { register OP *kid; - - kid = cLISTOP->op_first; + + kid = cLISTOPo->op_first; if (!kid) { - op = force_list(op); - kid = cLISTOP->op_first; + o = force_list(o); + kid = cLISTOPo->op_first; } if (kid->op_type == OP_PUSHMARK) kid = kid->op_sibling; - if (kid && op->op_flags & OPf_STACKED) + if (kid && o->op_flags & OPf_STACKED) kid = kid->op_sibling; else if (kid && !kid->op_sibling) { /* print HANDLE; */ if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) { - op->op_flags |= OPf_STACKED; /* make it a filehandle */ - kid = newUNOP(OP_RV2GV, 0, scalar(kid)); - cLISTOP->op_first->op_sibling = kid; - cLISTOP->op_last = kid; + o->op_flags |= OPf_STACKED; /* make it a filehandle */ + kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid)); + cLISTOPo->op_first->op_sibling = kid; + cLISTOPo->op_last = kid; kid = kid->op_sibling; } } if (!kid) - append_elem(op->op_type, op, newSVREF(newGVOP(OP_GV, 0, defgv)) ); + append_elem(o->op_type, o, newDEFSVOP()); + + o = listkids(o); + + o->op_private = 0; +#ifdef USE_LOCALE + if (hints & HINT_LOCALE) + o->op_private |= OPpLOCALE; +#endif + + return o; +} + +OP * +ck_fun_locale(OP *o) +{ + o = ck_fun(o); + + o->op_private = 0; +#ifdef USE_LOCALE + if (hints & HINT_LOCALE) + o->op_private |= OPpLOCALE; +#endif + + return o; +} - return listkids(op); +OP * +ck_scmp(OP *o) +{ + o->op_private = 0; +#ifdef USE_LOCALE + if (hints & HINT_LOCALE) + o->op_private |= OPpLOCALE; +#endif + + return o; } OP * -ck_match(op) -OP *op; +ck_match(OP *o) { - cPMOP->op_pmflags |= PMf_RUNTIME; - return op; + o->op_private |= OPpRUNTIME; + return o; } OP * -ck_null(op) -OP *op; +ck_null(OP *o) { - return op; + return o; } OP * -ck_repeat(op) -OP *op; +ck_repeat(OP *o) { - if (cBINOP->op_first->op_flags & OPf_PARENS) { - op->op_private = OPpREPEAT_DOLIST; - cBINOP->op_first = force_list(cBINOP->op_first); + if (cBINOPo->op_first->op_flags & OPf_PARENS) { + o->op_private |= OPpREPEAT_DOLIST; + cBINOPo->op_first = force_list(cBINOPo->op_first); } else - scalar(op); - return op; + scalar(o); + return o; } OP * -ck_require(op) -OP *op; +ck_require(OP *o) { - if (op->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */ - SVOP *kid = (SVOP*)cUNOP->op_first; + if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */ + SVOP *kid = (SVOP*)cUNOPo->op_first; if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) { char *s; for (s = SvPVX(kid->op_sv); *s; s++) { if (*s == ':' && s[1] == ':') { *s = '/'; - strcpy(s+1,s+2); /* known to be okay here */ + Move(s+2, s+1, strlen(s+2)+1, char); --SvCUR(kid->op_sv); } } sv_catpvn(kid->op_sv, ".pm", 3); } } - return ck_fun(op); + return ck_fun(o); } OP * -ck_retarget(op) -OP *op; +ck_retarget(OP *o) { croak("NOT IMPL LINE %d",__LINE__); /* STUB */ - return op; + return o; } OP * -ck_select(op) -OP *op; +ck_select(OP *o) { - if (op->op_flags & OPf_KIDS) { - OP *kid = cLISTOP->op_first->op_sibling; /* get past pushmark */ + OP* kid; + if (o->op_flags & OPf_KIDS) { + kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ if (kid && kid->op_sibling) { - op->op_type = OP_SSELECT; - op->op_ppaddr = ppaddr[OP_SSELECT]; - op = ck_fun(op); - return fold_constants(op); + o->op_type = OP_SSELECT; + o->op_ppaddr = ppaddr[OP_SSELECT]; + o = ck_fun(o); + return fold_constants(o); } } - return ck_fun(op); + o = ck_fun(o); + kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ + if (kid && kid->op_type == OP_RV2GV) + kid->op_private &= ~HINT_STRICT_REFS; + return o; } OP * -ck_shift(op) -OP *op; +ck_shift(OP *o) { - I32 type = op->op_type; + I32 type = o->op_type; - if (!(op->op_flags & OPf_KIDS)) { - op_free(op); - return newUNOP(type, 0, - scalar(newUNOP(OP_RV2AV, 0, + if (!(o->op_flags & OPf_KIDS)) { + OP *argop; + + op_free(o); +#ifdef USE_THREADS + if (!CvUNIQUE(compcv)) { + argop = newOP(OP_PADAV, OPf_REF); + argop->op_targ = 0; /* curpad[0] is @_ */ + } + else { + argop = newUNOP(OP_RV2AV, 0, scalar(newGVOP(OP_GV, 0, - gv_fetchpv((subline ? "_" : "ARGV"), TRUE, SVt_PVAV) ))))); + gv_fetchpv("ARGV", TRUE, SVt_PVAV)))); + } +#else + argop = newUNOP(OP_RV2AV, 0, + scalar(newGVOP(OP_GV, 0, !CvUNIQUE(compcv) ? + defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV)))); +#endif /* USE_THREADS */ + return newUNOP(type, 0, scalar(argop)); } - return scalar(modkids(ck_fun(op), type)); + return scalar(modkids(ck_fun(o), type)); } OP * -ck_sort(op) -OP *op; +ck_sort(OP *o) { - if (op->op_flags & OPf_STACKED) { - OP *kid = cLISTOP->op_first->op_sibling; /* get past pushmark */ + o->op_private = 0; +#ifdef USE_LOCALE + if (hints & HINT_LOCALE) + o->op_private |= OPpLOCALE; +#endif + + if (o->op_flags & OPf_STACKED) { + OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ OP *k; kid = kUNOP->op_first; /* get past rv2gv */ @@ -3547,148 +4646,257 @@ OP *op; kid->op_next = 0; } else if (kid->op_type == OP_LEAVE) { - null(kid); /* wipe out leave */ - kid->op_next = kid; + if (o->op_type == OP_SORT) { + null(kid); /* wipe out leave */ + kid->op_next = kid; - for (k = kLISTOP->op_first->op_next; k; k = k->op_next) { - if (k->op_next == kid) - k->op_next = 0; + for (k = kLISTOP->op_first->op_next; k; k = k->op_next) { + if (k->op_next == kid) + k->op_next = 0; + } } + else + kid->op_next = 0; /* just disconnect the leave */ k = kLISTOP->op_first; } peep(k); - kid = cLISTOP->op_first->op_sibling; /* get past pushmark */ + kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ null(kid); /* wipe out rv2gv */ - if (op->op_type == OP_SORT) + if (o->op_type == OP_SORT) kid->op_next = kid; else kid->op_next = k; - op->op_flags |= OPf_SPECIAL; + o->op_flags |= OPf_SPECIAL; } } - return op; + + return o; } OP * -ck_split(op) -OP *op; +ck_split(OP *o) { register OP *kid; - PMOP* pm; - - if (op->op_flags & OPf_STACKED) - return no_fh_allowed(op); - kid = cLISTOP->op_first; + if (o->op_flags & OPf_STACKED) + return no_fh_allowed(o); + + kid = cLISTOPo->op_first; if (kid->op_type != OP_NULL) croak("panic: ck_split"); kid = kid->op_sibling; - op_free(cLISTOP->op_first); - cLISTOP->op_first = kid; + op_free(cLISTOPo->op_first); + cLISTOPo->op_first = kid; if (!kid) { - cLISTOP->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1)); - cLISTOP->op_last = kid; /* There was only one element previously */ + cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1)); + cLISTOPo->op_last = kid; /* There was only one element previously */ } if (kid->op_type != OP_MATCH) { OP *sibl = kid->op_sibling; kid->op_sibling = 0; kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop); - if (cLISTOP->op_first == cLISTOP->op_last) - cLISTOP->op_last = kid; - cLISTOP->op_first = kid; + if (cLISTOPo->op_first == cLISTOPo->op_last) + cLISTOPo->op_last = kid; + cLISTOPo->op_first = kid; kid->op_sibling = sibl; } - pm = (PMOP*)kid; - if (pm->op_pmshort && !(pm->op_pmflags & PMf_ALL)) { - SvREFCNT_dec(pm->op_pmshort); /* can't use substring to optimize */ - pm->op_pmshort = 0; - } kid->op_type = OP_PUSHRE; kid->op_ppaddr = ppaddr[OP_PUSHRE]; scalar(kid); if (!kid->op_sibling) - append_elem(OP_SPLIT, op, newSVREF(newGVOP(OP_GV, 0, defgv)) ); + append_elem(OP_SPLIT, o, newDEFSVOP()); kid = kid->op_sibling; scalar(kid); if (!kid->op_sibling) - append_elem(OP_SPLIT, op, newSVOP(OP_CONST, 0, newSViv(0))); + append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0))); kid = kid->op_sibling; scalar(kid); if (kid->op_sibling) - return too_many_arguments(op); + return too_many_arguments(o,op_desc[o->op_type]); - return op; + return o; } OP * -ck_subr(op) -OP *op; +ck_subr(OP *o) { - OP *o = ((cUNOP->op_first->op_sibling) - ? cUNOP : ((UNOP*)cUNOP->op_first))->op_first->op_sibling; - - if (o->op_type == OP_RV2CV) - null(o); /* disable rv2cv */ - op->op_private = (hints & HINT_STRICT_REFS); - if (perldb && curstash != debstash) - op->op_private |= OPpDEREF_DB; - while (o = o->op_sibling) - mod(o, OP_ENTERSUB); - return op; + dTHR; + OP *prev = ((cUNOPo->op_first->op_sibling) + ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first; + OP *o2 = prev->op_sibling; + OP *cvop; + char *proto = 0; + CV *cv = 0; + GV *namegv = 0; + int optional = 0; + I32 arg = 0; + + for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ; + if (cvop->op_type == OP_RV2CV) { + SVOP* tmpop; + o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER); + null(cvop); /* disable rv2cv */ + tmpop = (SVOP*)((UNOP*)cvop)->op_first; + if (tmpop->op_type == OP_GV) { + cv = GvCVu(tmpop->op_sv); + if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) { + namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv); + proto = SvPV((SV*)cv, na); + } + } + } + o->op_private |= (hints & HINT_STRICT_REFS); + if (PERLDB_SUB && curstash != debstash) + o->op_private |= OPpENTERSUB_DB; + while (o2 != cvop) { + if (proto) { + switch (*proto) { + case '\0': + return too_many_arguments(o, gv_ename(namegv)); + case ';': + optional = 1; + proto++; + continue; + case '$': + proto++; + arg++; + scalar(o2); + break; + case '%': + case '@': + list(o2); + arg++; + break; + case '&': + proto++; + arg++; + if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF) + bad_type(arg, "block", gv_ename(namegv), o2); + break; + case '*': + proto++; + arg++; + if (o2->op_type == OP_RV2GV) + goto wrapref; + { + OP* kid = o2; + OP* sib = kid->op_sibling; + kid->op_sibling = 0; + o2 = newUNOP(OP_RV2GV, 0, kid); + o2->op_sibling = sib; + prev->op_sibling = o2; + } + goto wrapref; + case '\\': + proto++; + arg++; + switch (*proto++) { + case '*': + if (o2->op_type != OP_RV2GV) + bad_type(arg, "symbol", gv_ename(namegv), o2); + goto wrapref; + case '&': + if (o2->op_type != OP_RV2CV) + bad_type(arg, "sub", gv_ename(namegv), o2); + goto wrapref; + case '$': + if (o2->op_type != OP_RV2SV && o2->op_type != OP_PADSV) + bad_type(arg, "scalar", gv_ename(namegv), o2); + goto wrapref; + case '@': + if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV) + bad_type(arg, "array", gv_ename(namegv), o2); + goto wrapref; + case '%': + if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV) + bad_type(arg, "hash", gv_ename(namegv), o2); + wrapref: + { + OP* kid = o2; + OP* sib = kid->op_sibling; + kid->op_sibling = 0; + o2 = newUNOP(OP_REFGEN, 0, kid); + o2->op_sibling = sib; + prev->op_sibling = o2; + } + break; + default: goto oops; + } + break; + case ' ': + proto++; + continue; + default: + oops: + croak("Malformed prototype for %s: %s", + gv_ename(namegv), SvPV((SV*)cv, na)); + } + } + else + list(o2); + mod(o2, OP_ENTERSUB); + prev = o2; + o2 = o2->op_sibling; + } + if (proto && !optional && + (*proto && *proto != '@' && *proto != '%' && *proto != ';')) + return too_few_arguments(o, gv_ename(namegv)); + return o; } OP * -ck_svconst(op) -OP *op; +ck_svconst(OP *o) { - SvREADONLY_on(cSVOP->op_sv); - return op; + SvREADONLY_on(cSVOPo->op_sv); + return o; } OP * -ck_trunc(op) -OP *op; +ck_trunc(OP *o) { - if (op->op_flags & OPf_KIDS) { - SVOP *kid = (SVOP*)cUNOP->op_first; + if (o->op_flags & OPf_KIDS) { + SVOP *kid = (SVOP*)cUNOPo->op_first; if (kid->op_type == OP_NULL) kid = (SVOP*)kid->op_sibling; if (kid && kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) - op->op_flags |= OPf_SPECIAL; + o->op_flags |= OPf_SPECIAL; } - return ck_fun(op); + return ck_fun(o); } /* A peephole optimizer. We visit the ops in the order they're to execute. */ void -peep(o) -register OP* o; +peep(register OP *o) { + dTHR; register OP* oldop = 0; if (!o || o->op_seq) return; ENTER; - SAVESPTR(op); + SAVEOP(); SAVESPTR(curcop); for (; o; o = o->op_next) { if (o->op_seq) break; + if (!op_seqmax) + op_seqmax++; op = o; switch (o->op_type) { case OP_NEXTSTATE: case OP_DBSTATE: curcop = ((COP*)o); /* for warnings */ + o->op_seq = op_seqmax++; break; case OP_CONCAT: @@ -3699,30 +4907,34 @@ register OP* o; case OP_LC: case OP_LCFIRST: case OP_QUOTEMETA: - if (o->op_next->op_type == OP_STRINGIFY) + if (o->op_next && o->op_next->op_type == OP_STRINGIFY) null(o->op_next); - o->op_seq = ++op_seqmax; + o->op_seq = op_seqmax++; break; case OP_STUB: - if ((o->op_flags & (OPf_KNOW|OPf_LIST)) != (OPf_KNOW|OPf_LIST)) { - o->op_seq = ++op_seqmax; - break; /* Scalar stub must produce undef. List stub is noop */ + if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) { + o->op_seq = op_seqmax++; + break; /* Scalar stub must produce undef. List stub is noop */ } - /* FALL THROUGH */ + goto nothin; case OP_NULL: + if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE) + curcop = ((COP*)o); + goto nothin; case OP_SCALAR: case OP_LINESEQ: case OP_SCOPE: + nothin: if (oldop && o->op_next) { oldop->op_next = o->op_next; continue; } - o->op_seq = ++op_seqmax; + o->op_seq = op_seqmax++; break; case OP_GV: if (o->op_next->op_type == OP_RV2SV) { - if (!(o->op_next->op_private & (OPpDEREF_HV|OPpDEREF_AV))) { + if (!(o->op_next->op_private & OPpDEREF)) { null(o->op_next); o->op_private |= o->op_next->op_private & OPpLVAL_INTRO; o->op_next = o->op_next->op_next; @@ -3737,11 +4949,12 @@ register OP* o; (op = pop->op_next) && pop->op_next->op_type == OP_AELEM && !(pop->op_next->op_private & - (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)) && + (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) && (i = SvIV(((SVOP*)pop)->op_sv) - compiling.cop_arybase) <= 255 && i >= 0) { + SvREFCNT_dec(((SVOP*)pop)->op_sv); null(o->op_next); null(pop->op_next); null(pop); @@ -3750,28 +4963,48 @@ register OP* o; o->op_type = OP_AELEMFAST; o->op_ppaddr = ppaddr[OP_AELEMFAST]; o->op_private = (U8)i; - GvAVn((GV*)(((SVOP*)o)->op_sv)); + GvAVn(((GVOP*)o)->op_gv); } } - o->op_seq = ++op_seqmax; + o->op_seq = op_seqmax++; + break; + + case OP_PADAV: + if (o->op_next->op_type == OP_RV2AV + && (o->op_next->op_flags && OPf_REF)) + { + null(o->op_next); + o->op_next = o->op_next->op_next; + } + break; + + case OP_PADHV: + if (o->op_next->op_type == OP_RV2HV + && (o->op_next->op_flags && OPf_REF)) + { + null(o->op_next); + o->op_next = o->op_next->op_next; + } break; case OP_MAPWHILE: case OP_GREPWHILE: case OP_AND: case OP_OR: - o->op_seq = ++op_seqmax; + o->op_seq = op_seqmax++; + while (cLOGOP->op_other->op_type == OP_NULL) + cLOGOP->op_other = cLOGOP->op_other->op_next; peep(cLOGOP->op_other); break; case OP_COND_EXPR: - o->op_seq = ++op_seqmax; + o->op_seq = op_seqmax++; peep(cCONDOP->op_true); peep(cCONDOP->op_false); break; case OP_ENTERLOOP: - o->op_seq = ++op_seqmax; + o->op_seq = op_seqmax++; peep(cLOOP->op_redoop); peep(cLOOP->op_nextop); peep(cLOOP->op_lastop); @@ -3779,14 +5012,16 @@ register OP* o; case OP_MATCH: case OP_SUBST: - o->op_seq = ++op_seqmax; + o->op_seq = op_seqmax++; peep(cPMOP->op_pmreplstart); break; case OP_EXEC: - o->op_seq = ++op_seqmax; + o->op_seq = op_seqmax++; if (dowarn && o->op_next && o->op_next->op_type == OP_NEXTSTATE) { if (o->op_next->op_sibling && + o->op_next->op_sibling->op_type != OP_EXIT && + o->op_next->op_sibling->op_type != OP_WARN && o->op_next->op_sibling->op_type != OP_DIE) { line_t oldline = curcop->cop_line; @@ -3797,8 +5032,49 @@ register OP* o; } } break; + + case OP_HELEM: { + UNOP *rop; + SV *lexname; + GV **fields; + SV **svp, **indsvp; + I32 ind; + char *key; + STRLEN keylen; + + if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO) + || ((BINOP*)o)->op_last->op_type != OP_CONST) + break; + rop = (UNOP*)((BINOP*)o)->op_first; + if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV) + break; + lexname = *av_fetch(comppad_name, rop->op_first->op_targ, TRUE); + if (!SvOBJECT(lexname)) + break; + fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE); + if (!fields || !GvHV(*fields)) + break; + svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv; + key = SvPV(*svp, keylen); + indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE); + if (!indsvp) { + croak("No such field \"%s\" in variable %s of type %s", + key, SvPV(lexname, na), HvNAME(SvSTASH(lexname))); + } + ind = SvIV(*indsvp); + if (ind < 1) + croak("Bad index while coercing array into hash"); + rop->op_type = OP_RV2AV; + rop->op_ppaddr = ppaddr[OP_RV2AV]; + o->op_type = OP_AELEM; + o->op_ppaddr = ppaddr[OP_AELEM]; + SvREFCNT_dec(*svp); + *svp = newSViv(ind); + break; + } + default: - o->op_seq = ++op_seqmax; + o->op_seq = op_seqmax++; break; } oldop = o;