/* perly.y
*
* Copyright (c) 1991-2002, 2003, 2004, 2005, 2006 Larry Wall
+ * Copyright (c) 2007, 2008 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
/*
* 'I see,' laughed Strider. 'I look foul and feel fair. Is that it?
- * All that is gold does not glitter, not all those who wander are lost.'
+ * All that is gold does not glitter, not all those who wander are lost.'
*
+ * [p.171 of _The Lord of the Rings_, I/x: "Strider"]
+ */
+
+/*
* This file holds the grammar for the Perl language. If edited, you need
* to run regen_perly.pl, which re-creates the files perly.h, perly.tab
* and perly.act which are derived from this.
%token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF
%token <opval> FUNC0SUB UNIOPSUB LSTOPSUB
+%token <opval> PLUGEXPR PLUGSTMT
%token <p_tkval> LABEL
%token <i_tkval> FORMAT SUB ANONSUB PACKAGE USE
%token <i_tkval> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR
%token <i_tkval> GIVEN WHEN DEFAULT
-%token <i_tkval> LOOPEX DOTDOT
+%token <i_tkval> LOOPEX DOTDOT YADAYADA
%token <i_tkval> FUNC0 FUNC1 FUNC UNIOP LSTOP
%token <i_tkval> RELOP EQOP MULOP ADDOP
%token <i_tkval> DOLSHARP DO HASHBRACK NOAMP
%token <i_tkval> LOCAL MY MYSUB REQUIRE
%token <i_tkval> COLONATTR
-%type <ival> prog progstart remember mremember savescope
+%type <ival> prog progstart remember mremember
%type <ival> startsub startanonsub startformsub
/* FIXME for MAD - are these two ival? */
%type <ival> mydefsv mintro
%type <opval> decl format subrout mysubrout package use peg
-%type <opval> block mblock lineseq line loop cond else
+%type <opval> block package_block mblock lineseq line loop cond else
%type <opval> expr term subscripted scalar ary hsh arylen star amper sideff
%type <opval> argexpr nexpr texpr iexpr mexpr mnexpr miexpr
%type <opval> listexpr listexprcom indirob listop method
%left <i_tkval> ','
%right <i_tkval> ASSIGNOP
%right <i_tkval> '?' ':'
-%nonassoc DOTDOT
+%nonassoc DOTDOT YADAYADA
%left <i_tkval> OROR DORDOR
%left <i_tkval> ANDAND
%left <i_tkval> BITOROP
;
mydefsv: /* NULL */ /* lexicalize $_ */
- { $$ = (I32) allocmy("$_"); }
+ { $$ = (I32) Perl_allocmy(aTHX_ STR_WITH_LEN("$_"), 0); }
;
progstart:
{ $$ = block_start(FALSE); }
;
-savescope: /* NULL */ /* remember stack pos in case of error */
- { $$ = PL_savestack_ix; }
-
/* A collection of "lines" in the program */
lineseq : /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| lineseq decl
{
$$ = IF_MAD(
(LISTOP*)$1, (LISTOP*)$2),
$1);
}
- | lineseq savescope line
- { LEAVE_SCOPE($2);
- $$ = append_list(OP_LINESEQ,
- (LISTOP*)$1, (LISTOP*)$3);
+ | lineseq line
+ { $$ = append_list(OP_LINESEQ,
+ (LISTOP*)$1, (LISTOP*)$2);
PL_pad_reset_pending = TRUE;
- if ($1 && $3) PL_hints |= HINT_BLOCK_SCOPE; }
+ if ($1 && $2)
+ PL_hints |= HINT_BLOCK_SCOPE;
+ }
;
/* A "line" in the program */
else {
$$ = IF_MAD(
newOP(OP_NULL, 0),
- Nullop);
+ (OP*)NULL);
PL_parser->copline = NOLINE;
TOKEN_FREE($1);
TOKEN_GETMAD($2,$$,';');
{
$$ = newSTATEOP(0, PVAL($1), $2);
PL_parser->expect = XSTATE;
- DO_MAD(
+ DO_MAD({
/* sideff might already have a nexstate */
OP* op = ((LISTOP*)$$)->op_first;
if (op) {
token_getmad($1,op,'L');
token_getmad($3,op,';');
}
- )
- }
+ })
+ }
+ | package_block
+ { $$ = newSTATEOP(0, NULL,
+ newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
+ NOLINE, (OP*)NULL, $1,
+ (OP*)NULL, 0)); }
+ | label PLUGSTMT
+ { $$ = newSTATEOP(0, PVAL($1), $2); }
;
/* An expression which may have a side-effect */
sideff : error
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| expr
{ $$ = $1; }
| expr IF expr
TOKEN_GETMAD($2,$$,'w');
}
| expr FOR expr
- { $$ = newFOROP(0, Nullch, (line_t)IVAL($2),
- Nullop, $3, $1, Nullop);
+ { $$ = newFOROP(0, NULL, (line_t)IVAL($2),
+ (OP*)NULL, $3, $1, (OP*)NULL);
TOKEN_GETMAD($2,((LISTOP*)$$)->op_first->op_sibling,'w');
}
+ | expr WHEN expr
+ { $$ = newWHENOP($3, scope($1)); }
;
/* else and elsif blocks */
else : /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| ELSE mblock
{ ($2)->op_flags |= OPf_PARENS; $$ = scope($2);
TOKEN_GETMAD($1,$$,'o');
}
| ELSIF '(' mexpr ')' mblock else
{ PL_parser->copline = (line_t)IVAL($1);
- $$ = newCONDOP(0, $3, scope($5), $6);
+ $$ = newCONDOP(0, newSTATEOP(OPf_SPECIAL,NULL,$3), scope($5), $6);
PL_hints |= HINT_BLOCK_SCOPE;
TOKEN_GETMAD($1,$$,'I');
TOKEN_GETMAD($2,$$,'(');
/* Continue blocks */
cont : /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| CONTINUE block
{ $$ = scope($2);
TOKEN_GETMAD($1,$$,'o');
/* Loops: while, until, for, and a bare block */
loop : label WHILE '(' remember texpr ')' mintro mblock cont
{ OP *innerop;
- PL_parser->copline = (line_t)$2;
+ PL_parser->copline = (line_t)IVAL($2);
$$ = block_end($4,
newSTATEOP(0, PVAL($1),
- innerop = newWHILEOP(0, 1, (LOOP*)Nullop,
+ innerop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
IVAL($2), $5, $8, $9, $7)));
TOKEN_GETMAD($1,innerop,'L');
TOKEN_GETMAD($2,innerop,'W');
| label UNTIL '(' remember iexpr ')' mintro mblock cont
{ OP *innerop;
- PL_parser->copline = (line_t)$2;
+ PL_parser->copline = (line_t)IVAL($2);
$$ = block_end($4,
newSTATEOP(0, PVAL($1),
- innerop = newWHILEOP(0, 1, (LOOP*)Nullop,
+ innerop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
IVAL($2), $5, $8, $9, $7)));
TOKEN_GETMAD($1,innerop,'L');
TOKEN_GETMAD($2,innerop,'W');
{ OP *innerop;
$$ = block_end($4,
innerop = newFOROP(0, PVAL($1), (line_t)IVAL($2),
- Nullop, $5, $7, $8));
+ (OP*)NULL, $5, $7, $8));
TOKEN_GETMAD($1,((LISTOP*)innerop)->op_first,'L');
TOKEN_GETMAD($2,((LISTOP*)innerop)->op_first->op_sibling,'W');
TOKEN_GETMAD($3,((LISTOP*)innerop)->op_first->op_sibling,'(');
{ OP *forop;
PL_parser->copline = (line_t)IVAL($2);
forop = newSTATEOP(0, PVAL($1),
- newWHILEOP(0, 1, (LOOP*)Nullop,
+ newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
IVAL($2), scalar($7),
$12, $10, $9));
#ifdef MAD
$$ = block_end($4, forop); }
| label block cont /* a block is a loop that happens once */
{ $$ = newSTATEOP(0, PVAL($1),
- newWHILEOP(0, 1, (LOOP*)Nullop,
- NOLINE, Nullop, $2, $3, 0));
+ newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
+ NOLINE, (OP*)NULL, $2, $3, 0));
TOKEN_GETMAD($1,((LISTOP*)$$)->op_first,'L'); }
;
/* Switch blocks */
switch : label GIVEN '(' remember mydefsv mexpr ')' mblock
- { PL_parser->copline = (line_t) $2;
+ { PL_parser->copline = (line_t) IVAL($2);
$$ = block_end($4,
newSTATEOP(0, PVAL($1),
newGIVENOP($6, scope($8),
/* Normal expression */
nexpr : /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| sideff
;
{
#ifdef MAD
YYSTYPE tmplval;
- tmplval.pval = Nullch;
+ tmplval.pval = NULL;
$$ = newTOKEN(OP_NULL, tmplval, 0);
#else
- $$ = Nullch;
+ $$ = NULL;
#endif
}
| LABEL
;
format : FORMAT startformsub formname block
- { SvREFCNT_inc_simple_void(PL_compcv);
+ {
+ CV *fmtcv = PL_compcv;
+ SvREFCNT_inc_simple_void(PL_compcv);
#ifdef MAD
$$ = newFORM($2, $3, $4);
prepend_madprops($1->tk_mad, $$, 'F');
token_free($1);
#else
newFORM($2, $3, $4);
- $$ = Nullop;
+ $$ = (OP*)NULL;
#endif
+ if (CvOUTSIDE(fmtcv) && !CvUNIQUE(CvOUTSIDE(fmtcv))) {
+ SvREFCNT_inc_simple_void(fmtcv);
+ pad_add_anon((SV*)fmtcv, OP_NULL);
+ }
}
;
formname: WORD { $$ = $1; }
- | /* NULL */ { $$ = Nullop; }
+ | /* NULL */ { $$ = (OP*)NULL; }
;
/* Unimplemented "my sub foo { }" */
token_getmad($1,$$,'d');
#else
newMYSUB($2, $3, $4, $5, $6);
- $$ = Nullop;
+ $$ = (OP*)NULL;
#endif
}
;
subrout : SUB startsub subname proto subattrlist subbody
{ SvREFCNT_inc_simple_void(PL_compcv);
#ifdef MAD
- OP* o = newSVOP(OP_ANONCODE, 0,
- (SV*)newATTRSUB($2, $3, $4, $5, $6));
- $$ = newOP(OP_NULL,0);
- op_getmad(o,$$,'&');
- op_getmad($3,$$,'n');
- op_getmad($4,$$,'s');
- op_getmad($5,$$,'a');
- token_getmad($1,$$,'d');
- append_madprops($6->op_madprop, $$, 0);
- $6->op_madprop = 0;
+ {
+ OP* o = newSVOP(OP_ANONCODE, 0,
+ (SV*)newATTRSUB($2, $3, $4, $5, $6));
+ $$ = newOP(OP_NULL,0);
+ op_getmad(o,$$,'&');
+ op_getmad($3,$$,'n');
+ op_getmad($4,$$,'s');
+ op_getmad($5,$$,'a');
+ token_getmad($1,$$,'d');
+ append_madprops($6->op_madprop, $$, 0);
+ $6->op_madprop = 0;
+ }
#else
newATTRSUB($2, $3, $4, $5, $6);
- $$ = Nullop;
+ $$ = (OP*)NULL;
#endif
}
;
/* Subroutine prototype */
proto : /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| THING
;
/* Optional list of subroutine attributes */
subattrlist: /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| COLONATTR THING
{ $$ = $2;
TOKEN_GETMAD($1,$$,':');
| COLONATTR
{ $$ = IF_MAD(
newOP(OP_NULL, 0),
- Nullop
+ (OP*)NULL
);
TOKEN_GETMAD($1,$$,':');
}
| COLONATTR
{ $$ = IF_MAD(
newOP(OP_NULL, 0),
- Nullop
+ (OP*)NULL
);
TOKEN_GETMAD($1,$$,':');
}
subbody : block { $$ = $1; }
| ';' { $$ = IF_MAD(
newOP(OP_NULL,0),
- Nullop
+ (OP*)NULL
);
PL_parser->expect = XSTATE;
TOKEN_GETMAD($1,$$,';');
}
;
-package : PACKAGE WORD ';'
+package : PACKAGE WORD WORD ';'
{
#ifdef MAD
- $$ = package($2);
+ $$ = package($3);
token_getmad($1,$$,'o');
- token_getmad($3,$$,';');
+ if ($2)
+ package_version($2);
+ token_getmad($4,$$,';');
#else
- package($2);
- $$ = Nullop;
+ package($3);
+ if ($2)
+ package_version($2);
+ $$ = (OP*)NULL;
#endif
}
;
+package_block: PACKAGE WORD WORD '{' remember
+ {
+ int save_3_latefree = $3->op_latefree;
+ $3->op_latefree = 1;
+ package($3);
+ $3->op_latefree = save_3_latefree;
+ if ($2) {
+ int save_2_latefree = $2->op_latefree;
+ $2->op_latefree = 1;
+ package_version($2);
+ $2->op_latefree = save_2_latefree;
+ }
+ }
+ lineseq '}'
+ { if (PL_parser->copline > (line_t)IVAL($4))
+ PL_parser->copline = (line_t)IVAL($4);
+ $$ = block_end($5, $7);
+ TOKEN_GETMAD($4,$$,'{');
+ TOKEN_GETMAD($8,$$,'}');
+ op_free($3);
+ if ($2)
+ op_free($2);
+ }
+ ;
+
use : USE startsub
{ CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ }
WORD WORD listexpr ';'
token_getmad($7,$$,';');
if (PL_parser->rsfp_filters &&
AvFILLp(PL_parser->rsfp_filters) >= 0)
- append_madprops(newMADPROP('!', MAD_PV, "", 0), $$, 0);
+ append_madprops(newMADPROP('!', MAD_NULL, NULL, 0), $$, 0);
#else
utilize(IVAL($1), $2, $4, $5, $6);
- $$ = Nullop;
+ $$ = (OP*)NULL;
#endif
}
;
}
| LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */
{ SvREFCNT_inc_simple_void(PL_compcv);
- $<opval>$ = newANONATTRSUB($2, 0, Nullop, $3); }
+ $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); }
listexpr %prec LSTOP /* ... @bar */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST,
TOKEN_GETMAD($6,$$,']');
}
| '(' ')' '[' expr ']' /* empty list slice! */
- { $$ = newSLICEOP(0, $4, Nullop);
+ { $$ = newSLICEOP(0, $4, (OP*)NULL);
TOKEN_GETMAD($1,$$,'(');
TOKEN_GETMAD($2,$$,')');
TOKEN_GETMAD($3,$$,'[');
| term DOTDOT term /* $x..$y, $x...$y */
{
$$ = newRANGE(IVAL($2), scalar($1), scalar($3));
- DO_MAD(
+ DO_MAD({
UNOP *op;
op = (UNOP*)$$;
op = (UNOP*)op->op_first; /* get to flop */
op = (UNOP*)op->op_first; /* get to flip */
op = (UNOP*)op->op_first; /* get to range */
token_getmad($2,(OP*)op,'o');
- )
+ })
}
| term ANDAND term /* $x && $y */
{ $$ = newLOGOP(OP_AND, 0, $1, $3);
TOKEN_GETMAD($3,$$,']');
}
| '[' ']'
- { $$ = newANONLIST(Nullop);
+ { $$ = newANONLIST((OP*)NULL);
TOKEN_GETMAD($1,$$,'[');
TOKEN_GETMAD($2,$$,']');
}
TOKEN_GETMAD($4,$$,'}');
}
| HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */
- { $$ = newANONHASH(Nullop);
+ { $$ = newANONHASH((OP*)NULL);
TOKEN_GETMAD($1,$$,'{');
TOKEN_GETMAD($2,$$,';');
TOKEN_GETMAD($3,$$,'}');
scalar(newCVREF(
(OPpENTERSUB_AMPER<<8),
scalar($2)
- )),Nullop)); dep();
+ )),(OP*)NULL)); dep();
TOKEN_GETMAD($1,$$,'o');
TOKEN_GETMAD($3,$$,'(');
TOKEN_GETMAD($4,$$,')');
| DO scalar '(' ')' /* do $subref () */
{ $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
prepend_elem(OP_LIST,
- scalar(newCVREF(0,scalar($2))), Nullop)); dep();
+ scalar(newCVREF(0,scalar($2))), (OP*)NULL)); dep();
TOKEN_GETMAD($1,$$,'o');
TOKEN_GETMAD($3,$$,'(');
TOKEN_GETMAD($4,$$,')');
{ $$ = $1; }
| LOCAL term %prec UNIOP
{ $$ = localize($2,IVAL($1));
- TOKEN_GETMAD($1,$$,'d');
+ TOKEN_GETMAD($1,$$,'k');
}
| '(' expr ')'
{ $$ = sawparens(IF_MAD(newUNOP(OP_NULL,0,$2), $2));
{
$$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST, $3, scalar($1)));
- DO_MAD(
+ DO_MAD({
OP* op = $$;
if (op->op_type == OP_CONST) { /* defeat const fold */
op = (OP*)op->op_madprop->mad_val;
}
token_getmad($2,op,'(');
token_getmad($4,op,')');
- )
+ })
}
| NOAMP WORD listexpr /* foo(@args) */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
}
| WORD
| listop
+ | YADAYADA
+ {
+ $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0),
+ newSVOP(OP_CONST, 0, newSVpvs("Unimplemented")));
+ TOKEN_GETMAD($1,$$,'X');
+ }
+ | PLUGEXPR
;
/* "my" declarations, with optional attributes */
/* Basic list expressions */
listexpr: /* NULL */ %prec PREC_LOW
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| argexpr %prec PREC_LOW
{ $$ = $1; }
;
listexprcom: /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| expr
{ $$ = $1; }
| expr ','
https://perl5.git.perl.org / perl5.git / blobdiff