* The main job of of this grammar is to call the various newFOO()
* functions in op.c to build a syntax tree of OP structs.
* It relies on the lexer in toke.c to do the tokenizing.
+ *
+ * Note: due to the way that the cleanup code works WRT to freeing ops on
+ * the parse stack, it is dangerous to assign to the $n variables within
+ * an action.
*/
/* Make the parser re-entrant. */
char *pval;
OP *opval;
GV *gvval;
- AV* padval;
#ifdef PERL_IN_MADLY_C
TOKEN* p_tkval;
TOKEN* i_tkval;
%type <opval> termbinop termunop anonymous termdo
%type <opval> switch case
%type <p_tkval> label
-%type <padval> remempad
%nonassoc <i_tkval> PREC_LOW
%nonassoc LOOPEX
IVAL($2), scalar($7),
$12, $10, $9));
#ifdef MAD
- if (!$5)
- $5 = newOP(OP_NULL, 0);
forop = newUNOP(OP_NULL, 0, append_elem(OP_LINESEQ,
newSTATEOP(0,
- (($1)->tk_lval.pval
- ?savepv(($1)->tk_lval.pval):Nullch),
- $5),
+ CopLABEL_alloc(($1)->tk_lval.pval),
+ ($5 ? $5 : newOP(OP_NULL, 0)) ),
forop));
token_getmad($2,forop,'3');
#else
if ($5) {
forop = append_elem(OP_LINESEQ,
- newSTATEOP(0, ($1?savepv($1):Nullch),
- $5),
+ newSTATEOP(0, CopLABEL_alloc($1), $5),
forop);
}
}
;
-format : FORMAT remempad startformsub formname block
- { SvREFCNT_inc(PL_compcv);
+format : FORMAT startformsub formname block
+ { SvREFCNT_inc_simple_void(PL_compcv);
#ifdef MAD
- $$ = newFORM($3, $4, $5);
+ $$ = newFORM($2, $3, $4);
prepend_madprops($1->tk_mad, $$, 'F');
$1->tk_mad = 0;
token_free($1);
#else
- newFORM($3, $4, $5);
+ newFORM($2, $3, $4);
+ $$ = Nullop;
#endif
}
;
;
/* Unimplemented "my sub foo { }" */
-mysubrout: MYSUB remempad startsub subname proto subattrlist subbody
- { SvREFCNT_inc(PL_compcv);
+mysubrout: MYSUB startsub subname proto subattrlist subbody
+ { SvREFCNT_inc_simple_void(PL_compcv);
#ifdef MAD
- $$ = newMYSUB($3, $4, $5, $6, $7);
+ $$ = newMYSUB($2, $3, $4, $5, $6);
token_getmad($1,$$,'d');
#else
- newMYSUB($3, $4, $5, $6, $7);
+ newMYSUB($2, $3, $4, $5, $6);
+ $$ = Nullop;
#endif
}
;
/* Subroutine definition */
-subrout : SUB remempad startsub subname proto subattrlist subbody
- { SvREFCNT_inc(PL_compcv);
+subrout : SUB startsub subname proto subattrlist subbody
+ { SvREFCNT_inc_simple_void(PL_compcv);
#ifdef MAD
OP* o = newSVOP(OP_ANONCODE, 0,
- (SV*)newATTRSUB($3, $4, $5, $6, $7));
+ (SV*)newATTRSUB($2, $3, $4, $5, $6));
$$ = newOP(OP_NULL,0);
op_getmad(o,$$,'&');
- op_getmad($4,$$,'n');
- op_getmad($5,$$,'s');
- op_getmad($6,$$,'a');
+ op_getmad($3,$$,'n');
+ op_getmad($4,$$,'s');
+ op_getmad($5,$$,'a');
token_getmad($1,$$,'d');
- append_madprops($7->op_madprop, $$, 0);
- $7->op_madprop = 0;
+ append_madprops($6->op_madprop, $$, 0);
+ $6->op_madprop = 0;
#else
- newATTRSUB($3, $4, $5, $6, $7);
+ newATTRSUB($2, $3, $4, $5, $6);
$$ = Nullop;
#endif
}
;
-remempad: /* NULL */ /* remember current value of PL_comppad */
- { $$ = PL_comppad; }
- ;
-
startsub: /* NULL */ /* start a regular subroutine scope */
{ $$ = start_subparse(FALSE, 0);
SAVEFREESV(PL_compcv); }
token_getmad($3,$$,';');
#else
package($2);
+ $$ = Nullop;
#endif
}
;
-use : USE remempad startsub
+use : USE startsub
{ CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ }
WORD WORD listexpr ';'
- { SvREFCNT_inc(PL_compcv);
+ { SvREFCNT_inc_simple_void(PL_compcv);
#ifdef MAD
- $$ = utilize(IVAL($1), $3, $5, $6, $7);
+ $$ = utilize(IVAL($1), $2, $4, $5, $6);
token_getmad($1,$$,'o');
- token_getmad($8,$$,';');
+ token_getmad($7,$$,';');
if (PL_rsfp_filters && AvFILLp(PL_rsfp_filters) >= 0)
append_madprops(newMADPROP('!', MAD_PV, "", 0), $$, 0);
#else
- utilize(IVAL($1), $3, $5, $6, $7);
+ utilize(IVAL($1), $2, $4, $5, $6);
+ $$ = Nullop;
#endif
}
;
}
| argexpr ',' term
{
+ OP* term = $3;
DO_MAD(
- $3 = newUNOP(OP_NULL, 0, $3);
- token_getmad($2,$3,',');
+ term = newUNOP(OP_NULL, 0, term);
+ token_getmad($2,term,',');
)
- $$ = append_elem(OP_LIST, $1, $3);
+ $$ = append_elem(OP_LIST, $1, term);
}
| term %prec PREC_LOW
;
TOKEN_GETMAD($2,$$,'(');
TOKEN_GETMAD($4,$$,')');
}
- | LSTOPSUB remempad startanonsub block /* sub f(&@); f {foo} ... */
- { SvREFCNT_inc(PL_compcv);
- $4 = newANONATTRSUB($3, 0, Nullop, $4); }
+ | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */
+ { SvREFCNT_inc_simple_void(PL_compcv);
+ $<opval>$ = newANONATTRSUB($2, 0, Nullop, $3); }
listexpr %prec LSTOP /* ... @bar */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST,
- prepend_elem(OP_LIST, $4, $6), $1));
+ prepend_elem(OP_LIST, $<opval>4, $5), $1));
}
;
TOKEN_GETMAD($2,$$,';');
TOKEN_GETMAD($3,$$,'}');
}
- | ANONSUB remempad startanonsub proto subattrlist block %prec '('
- { SvREFCNT_inc(PL_compcv);
- $$ = newANONATTRSUB($3, $4, $5, $6);
+ | ANONSUB startanonsub proto subattrlist block %prec '('
+ { SvREFCNT_inc_simple_void(PL_compcv);
+ $$ = newANONATTRSUB($2, $3, $4, $5);
TOKEN_GETMAD($1,$$,'o');
- OP_GETMAD($4,$$,'s');
- OP_GETMAD($5,$$,'a');
+ OP_GETMAD($3,$$,'s');
+ OP_GETMAD($4,$$,'a');
}
;
{ $$ = newUNOP(IVAL($1), 0, $2);
TOKEN_GETMAD($1,$$,'o');
}
- | REQUIRE /* require, $_ implied *//* FIMXE for MAD needed? */
- { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); }
- | REQUIRE term /* require Foo *//* FIMXE for MAD needed? */
- { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); }
+ | REQUIRE /* require, $_ implied */
+ { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0);
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | REQUIRE term /* require Foo */
+ { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2);
+ TOKEN_GETMAD($1,$$,'o');
+ }
| UNIOPSUB
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); }
| UNIOPSUB term /* Sub treated as unop */
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