/* 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 <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
%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
/* A collection of "lines" in the program */
lineseq : /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| lineseq decl
{
$$ = IF_MAD(
else {
$$ = IF_MAD(
newOP(OP_NULL, 0),
- Nullop);
+ (OP*)NULL);
PL_parser->copline = NOLINE;
TOKEN_FREE($1);
TOKEN_GETMAD($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');
}
;
/* 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');
PL_parser->copline = (line_t)$2;
$$ = block_end($4,
newSTATEOP(0, PVAL($1),
- innerop = newWHILEOP(0, 1, (LOOP*)Nullop,
+ innerop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
IVAL($2), $5, $8, $9, $7)));
TOKEN_GETMAD($1,innerop,'L');
TOKEN_GETMAD($2,innerop,'W');
PL_parser->copline = (line_t)$2;
$$ = 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'); }
;
/* 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;
+ $$ = NULL;
#endif
}
| LABEL
token_free($1);
#else
newFORM($2, $3, $4);
- $$ = Nullop;
+ $$ = (OP*)NULL;
#endif
}
;
formname: WORD { $$ = $1; }
- | /* NULL */ { $$ = Nullop; }
+ | /* NULL */ { $$ = (OP*)NULL; }
;
/* Unimplemented "my sub foo { }" */
token_getmad($1,$$,'d');
#else
newMYSUB($2, $3, $4, $5, $6);
- $$ = Nullop;
+ $$ = (OP*)NULL;
#endif
}
;
}
#else
newATTRSUB($2, $3, $4, $5, $6);
- $$ = 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; }
| ';' { $$ = IF_MAD(
newOP(OP_NULL,0),
- Nullop
+ (OP*)NULL
);
PL_parser->expect = XSTATE;
TOKEN_GETMAD($1,$$,';');
token_getmad($3,$$,';');
#else
package($2);
- $$ = Nullop;
+ $$ = (OP*)NULL;
#endif
}
;
append_madprops(newMADPROP('!', MAD_PV, "", 0), $$, 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,$$,'[');
TOKEN_GETMAD($3,$$,']');
}
| '[' ']'
- { $$ = newANONLIST(Nullop);
+ { $$ = 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,$$,')');
}
| WORD
| listop
+ | YADAYADA
+ {
+ $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0),
+ newSVOP(OP_CONST, 0, newSVpvs("Unimplemented")));
+ }
;
/* "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 ','