/* Make the parser re-entrant. */
-%pure_parser
+%pure-parser
%start grammar
%token <ival> GRAMPROG GRAMEXPR GRAMBLOCK GRAMBARESTMT GRAMFULLSTMT GRAMSTMTSEQ
-%token <ival> '{' '}' '[' ']' '-' '+' '$' '@' '%' '*' '&' ';' '=' '.'
+%token <ival> '{' '}' '[' ']' '-' '+' '@' '%' '&' '=' '.'
-%token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF QWLIST
+%token <opval> BAREWORD METHOD FUNCMETH THING PMFUNC PRIVATEREF QWLIST
%token <opval> FUNC0OP FUNC0SUB UNIOPSUB LSTOPSUB
%token <opval> PLUGEXPR PLUGSTMT
%token <pval> LABEL
%type <opval> stmtseq fullstmt labfullstmt barestmt block mblock else
%type <opval> expr term subscripted scalar ary hsh arylen star amper sideff
%type <opval> sliceme kvslice gelem
-%type <opval> listexpr nexpr texpr iexpr mexpr mnexpr miexpr
+%type <opval> listexpr nexpr texpr iexpr mexpr mnexpr
%type <opval> optlistexpr optexpr optrepl indirob listop method
%type <opval> formname subname proto optsubbody cont my_scalar my_var
%type <opval> refgen_topic formblock
%type <opval> subattrlist myattrlist myattrterm myterm
-%type <opval> subsignature termbinop termunop anonymous termdo
+%type <opval> termbinop termunop anonymous termdo
+%type <ival> sigslurpsigil
+%type <opval> sigvarname sigdefault sigscalarelem sigslurpelem
+%type <opval> sigelem siglist siglistornull subsignature
%type <opval> formstmtseq formline formarg
%nonassoc <ival> PREC_LOW
%left <ival> ','
%right <ival> ASSIGNOP
%right <ival> '?' ':'
-%nonassoc DOTDOT YADAYADA
+%nonassoc DOTDOT
%left <ival> OROR DORDOR
%left <ival> ANDAND
%left <ival> BITOROP
grammar : GRAMPROG
{
parser->expect = XSTATE;
+ $<ival>$ = 0;
}
remember stmtseq
{
| GRAMEXPR
{
parser->expect = XTERM;
+ $<ival>$ = 0;
}
optexpr
{
| GRAMBLOCK
{
parser->expect = XBLOCK;
+ $<ival>$ = 0;
}
block
{
PL_eval_root = $3;
$$ = 0;
yyunlex();
- parser->yychar = YYEOF;
+ parser->yychar = yytoken = YYEOF;
}
| GRAMBARESTMT
{
parser->expect = XSTATE;
+ $<ival>$ = 0;
}
barestmt
{
PL_eval_root = $3;
$$ = 0;
yyunlex();
- parser->yychar = YYEOF;
+ parser->yychar = yytoken = YYEOF;
}
| GRAMFULLSTMT
{
parser->expect = XSTATE;
+ $<ival>$ = 0;
}
fullstmt
{
PL_eval_root = $3;
$$ = 0;
yyunlex();
- parser->yychar = YYEOF;
+ parser->yychar = yytoken = YYEOF;
}
| GRAMSTMTSEQ
{
parser->expect = XSTATE;
+ $<ival>$ = 0;
}
stmtseq
{
/* A sequence of statements in the program */
stmtseq : /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| stmtseq fullstmt
{ $$ = op_append_list(OP_LINESEQ, $1, $2);
PL_pad_reset_pending = TRUE;
/* A sequence of format lines */
formstmtseq: /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| formstmtseq formline
{ $$ = op_append_list(OP_LINESEQ, $1, $2);
PL_pad_reset_pending = TRUE;
{
CV *fmtcv = PL_compcv;
newFORM($2, $3, $4);
- $$ = (OP*)NULL;
+ $$ = NULL;
if (CvOUTSIDE(fmtcv) && !CvEVAL(CvOUTSIDE(fmtcv))) {
pad_add_weakref(fmtcv);
}
? newATTRSUB($3, $2, $5, $6, $7)
: newMYSUB($3, $2, $5, $6, $7)
;
- $$ = (OP*)NULL;
+ $$ = NULL;
intro_my();
parser->parsed_sub = 1;
}
? newATTRSUB($3, $2, NULL, $7, body)
: newMYSUB($3, $2, NULL, $7, body)
;
- $$ = (OP*)NULL;
+ $$ = NULL;
intro_my();
parser->parsed_sub = 1;
}
- | PACKAGE WORD WORD ';'
+ | PACKAGE BAREWORD BAREWORD ';'
{
package($3);
if ($2)
package_version($2);
- $$ = (OP*)NULL;
+ $$ = NULL;
}
| USE startsub
{ CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ }
- WORD WORD optlistexpr ';'
+ BAREWORD BAREWORD optlistexpr ';'
{
SvREFCNT_inc_simple_void(PL_compcv);
utilize($1, $2, $4, $5, $6);
parser->parsed_sub = 1;
- $$ = (OP*)NULL;
+ $$ = NULL;
}
| IF '(' remember mexpr ')' mblock else
{
newCONDOP(0, $4, op_scope($6), $7));
parser->copline = (line_t)$1;
}
- | UNLESS '(' remember miexpr ')' mblock else
+ | UNLESS '(' remember mexpr ')' mblock else
{
$$ = block_end($3,
- newCONDOP(0, $4, op_scope($6), $7));
+ newCONDOP(0, $4, $7, op_scope($6)));
parser->copline = (line_t)$1;
}
| GIVEN '(' remember mexpr ')' mblock
{
- const PADOFFSET offset = pad_findmy_pvs("$_", 0);
- $$ = block_end($3,
- newGIVENOP($4, op_scope($6),
- offset == NOT_IN_PAD
- || PAD_COMPNAME_FLAGS_isOUR(offset)
- ? 0
- : offset));
+ $$ = block_end($3, newGIVENOP($4, op_scope($6), 0));
parser->copline = (line_t)$1;
}
| WHEN '(' remember mexpr ')' mblock
| WHILE '(' remember texpr ')' mintro mblock cont
{
$$ = block_end($3,
- newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
+ newWHILEOP(0, 1, NULL,
$4, $7, $8, $6));
parser->copline = (line_t)$1;
}
| UNTIL '(' remember iexpr ')' mintro mblock cont
{
$$ = block_end($3,
- newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
+ newWHILEOP(0, 1, NULL,
$4, $7, $8, $6));
parser->copline = (line_t)$1;
}
mblock
{
OP *initop = $4;
- OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
+ OP *forop = newWHILEOP(0, 1, NULL,
scalar($7), $13, $11, $10);
if (initop) {
forop = op_prepend_elem(OP_LINESEQ, initop,
op_lvalue($2, OP_ENTERLOOP), $5, $7, $8));
parser->copline = (line_t)$1;
}
- | FOR REFGEN MY remember my_var
- { parser->in_my = 0; $<opval>$ = my($5); }
+ | FOR my_refgen remember my_var
+ { parser->in_my = 0; $<opval>$ = my($4); }
'(' mexpr ')' mblock cont
{
$$ = block_end(
- $4,
+ $3,
newFOROP(0,
op_lvalue(
newUNOP(OP_REFGEN, 0,
- $<opval>6),
+ $<opval>5),
OP_ENTERLOOP),
- $8, $10, $11)
+ $7, $9, $10)
);
parser->copline = (line_t)$1;
}
| FOR '(' remember mexpr ')' mblock cont
{
$$ = block_end($3,
- newFOROP(0, (OP*)NULL, $4, $6, $7));
+ newFOROP(0, NULL, $4, $6, $7));
parser->copline = (line_t)$1;
}
| block cont
{
/* a block is a loop that happens once */
- $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
- (OP*)NULL, $1, $2, 0);
+ $$ = newWHILEOP(0, 1, NULL,
+ NULL, $1, $2, 0);
}
- | PACKAGE WORD WORD '{' remember
+ | PACKAGE BAREWORD BAREWORD '{' remember
{
package($3);
if ($2) {
stmtseq '}'
{
/* a block is a loop that happens once */
- $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
- (OP*)NULL, block_end($5, $7), (OP*)NULL, 0);
+ $$ = newWHILEOP(0, 1, NULL,
+ NULL, block_end($5, $7), NULL, 0);
if (parser->copline > (line_t)$4)
parser->copline = (line_t)$4;
}
{
$$ = $1;
}
+ | YADAYADA ';'
+ {
+ $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0),
+ newSVOP(OP_CONST, 0, newSVpvs("Unimplemented")));
+ }
| ';'
{
- $$ = (OP*)NULL;
+ $$ = NULL;
parser->copline = NOLINE;
}
;
/* An expression which may have a side-effect */
sideff : error
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| expr
{ $$ = $1; }
| expr IF expr
| expr UNTIL iexpr
{ $$ = newLOOPOP(OPf_PARENS, 1, $3, $1); }
| expr FOR expr
- { $$ = newFOROP(0, (OP*)NULL, $3, $1, (OP*)NULL);
+ { $$ = newFOROP(0, NULL, $3, $1, NULL);
parser->copline = (line_t)$2; }
| expr WHEN expr
{ $$ = newWHENOP($3, op_scope($1)); }
/* else and elsif blocks */
else : /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| ELSE mblock
{
($2)->op_flags |= OPf_PARENS;
/* Continue blocks */
cont : /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| CONTINUE block
{ $$ = op_scope($2); }
;
/* Normal expression */
nexpr : /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| sideff
;
{ $$ = $1; intro_my(); }
;
-miexpr : iexpr
- { $$ = $1; intro_my(); }
- ;
-
-formname: WORD { $$ = $1; }
- | /* NULL */ { $$ = (OP*)NULL; }
+formname: BAREWORD { $$ = $1; }
+ | /* NULL */ { $$ = NULL; }
;
startsub: /* NULL */ /* start a regular subroutine scope */
;
/* Name of a subroutine - must be a bareword, could be special */
-subname : WORD
+subname : BAREWORD
| PRIVATEREF
;
/* Subroutine prototype */
proto : /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| THING
;
/* Optional list of subroutine attributes */
subattrlist: /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| COLONATTR THING
{ $$ = $2; }
| COLONATTR
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
;
/* List of attributes for a "my" variable declaration */
myattrlist: COLONATTR THING
{ $$ = $2; }
| COLONATTR
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
;
-/* Subroutine signature */
-subsignature: '('
- {
- /* We shouldn't get here otherwise */
- assert(FEATURE_SIGNATURES_IS_ENABLED);
- Perl_ck_warner_d(aTHX_
- packWARN(WARN_EXPERIMENTAL__SIGNATURES),
- "The signatures feature is experimental");
- $<opval>$ = parse_subsignature();
+
+/* --------------------------------------
+ * subroutine signature parsing
+ */
+
+/* the '' or 'foo' part of a '$' or '@foo' etc signature variable */
+sigvarname: /* NULL */
+ { parser->in_my = 0; $$ = NULL; }
+ | PRIVATEREF
+ { parser->in_my = 0; $$ = $1; }
+ ;
+
+sigslurpsigil:
+ '@'
+ { $$ = '@'; }
+ | '%'
+ { $$ = '%'; }
+
+/* @, %, @foo, %foo */
+sigslurpelem: sigslurpsigil sigvarname sigdefault/* def only to catch errors */
+ {
+ I32 sigil = $1;
+ OP *var = $2;
+ OP *defexpr = $3;
+
+ if (parser->sig_slurpy)
+ yyerror("Multiple slurpy parameters not allowed");
+ parser->sig_slurpy = (char)sigil;
+
+ if (defexpr)
+ yyerror("A slurpy parameter may not have "
+ "a default value");
+
+ $$ = var ? newSTATEOP(0, NULL, var) : NULL;
+ }
+ ;
+
+/* default part of sub signature scalar element: i.e. '= default_expr' */
+sigdefault: /* NULL */
+ { $$ = NULL; }
+ | ASSIGNOP
+ { $$ = newOP(OP_NULL, 0); }
+ | ASSIGNOP term
+ { $$ = $2; }
+
+
+/* subroutine signature scalar element: e.g. '$x', '$=', '$x = $default' */
+sigscalarelem:
+ '$' sigvarname sigdefault
+ {
+ OP *var = $2;
+ OP *defexpr = $3;
+
+ if (parser->sig_slurpy)
+ yyerror("Slurpy parameter not last");
+
+ parser->sig_elems++;
+
+ if (defexpr) {
+ parser->sig_optelems++;
+
+ if ( defexpr->op_type == OP_NULL
+ && !(defexpr->op_flags & OPf_KIDS))
+ {
+ /* handle '$=' special case */
+ if (var)
+ yyerror("Optional parameter "
+ "lacks default expression");
+ op_free(defexpr);
+ }
+ else {
+ /* a normal '=default' expression */
+ OP *defop = (OP*)alloc_LOGOP(OP_ARGDEFELEM,
+ defexpr,
+ LINKLIST(defexpr));
+ /* re-purpose op_targ to hold @_ index */
+ defop->op_targ =
+ (PADOFFSET)(parser->sig_elems - 1);
+
+ if (var) {
+ var->op_flags |= OPf_STACKED;
+ (void)op_sibling_splice(var,
+ NULL, 0, defop);
+ scalar(defop);
+ }
+ else
+ var = newUNOP(OP_NULL, 0, defop);
+
+ LINKLIST(var);
+ /* NB: normally the first child of a
+ * logop is executed before the logop,
+ * and it pushes a boolean result
+ * ready for the logop. For ARGDEFELEM,
+ * the op itself does the boolean
+ * calculation, so set the first op to
+ * it instead.
+ */
+ var->op_next = defop;
+ defexpr->op_next = var;
+ }
+ }
+ else {
+ if (parser->sig_optelems)
+ yyerror("Mandatory parameter "
+ "follows optional parameter");
+ }
+
+ $$ = var ? newSTATEOP(0, NULL, var) : NULL;
+ }
+ ;
+
+
+/* subroutine signature element: e.g. '$x = $default' or '%h' */
+sigelem: sigscalarelem
+ { parser->in_my = KEY_sigvar; $$ = $1; }
+ | sigslurpelem
+ { parser->in_my = KEY_sigvar; $$ = $1; }
+ ;
+
+/* list of subroutine signature elements */
+siglist:
+ siglist ','
+ { $$ = $1; }
+ | siglist ',' sigelem
+ {
+ $$ = op_append_list(OP_LINESEQ, $1, $3);
}
- ')'
+ | sigelem %prec PREC_LOW
+ { $$ = $1; }
+ ;
+
+/* () or (....) */
+siglistornull: /* NULL */
+ { $$ = NULL; }
+ | siglist
+ { $$ = $1; }
+
+/* Subroutine signature */
+subsignature: '('
+ {
+ ENTER;
+ SAVEIV(parser->sig_elems);
+ SAVEIV(parser->sig_optelems);
+ SAVEI8(parser->sig_slurpy);
+ parser->sig_elems = 0;
+ parser->sig_optelems = 0;
+ parser->sig_slurpy = 0;
+ parser->in_my = KEY_sigvar;
+ }
+ siglistornull
+ ')'
{
- $$ = op_append_list(OP_LINESEQ, $<opval>2,
- newSTATEOP(0, NULL, sawparens(newNULLLIST())));
- parser->expect = XATTRBLOCK;
+ OP *sigops = $3;
+ UNOP_AUX_item *aux;
+ OP *check;
+
+ if (!parser->error_count) {
+ assert(FEATURE_SIGNATURES_IS_ENABLED);
+ }
+
+ /* We shouldn't get here otherwise */
+ Perl_ck_warner_d(aTHX_
+ packWARN(WARN_EXPERIMENTAL__SIGNATURES),
+ "The signatures feature is experimental");
+
+ aux = (UNOP_AUX_item*)PerlMemShared_malloc(
+ sizeof(UNOP_AUX_item) * 3);
+ aux[0].iv = parser->sig_elems;
+ aux[1].iv = parser->sig_optelems;
+ aux[2].iv = parser->sig_slurpy;
+ check = newUNOP_AUX(OP_ARGCHECK, 0, NULL, aux);
+ sigops = op_prepend_elem(OP_LINESEQ, check, sigops);
+ sigops = op_prepend_elem(OP_LINESEQ,
+ newSTATEOP(0, NULL, NULL),
+ sigops);
+ /* a nextstate at the end handles context
+ * correctly for an empty sub body */
+ $$ = op_append_elem(OP_LINESEQ,
+ sigops,
+ newSTATEOP(0, NULL, NULL));
+
+ parser->in_my = 0;
+ parser->expect = XATTRBLOCK;
+ LEAVE;
}
;
+
+
/* Optional subroutine body, for named subroutine declaration */
optsubbody: block
- | ';' { $$ = (OP*)NULL; }
+ | ';' { $$ = NULL; }
;
/* Ordinary expressions; logical combinations */
{ $$ = op_convert_list($1, 0, $3); }
| LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */
{ SvREFCNT_inc_simple_void(PL_compcv);
- $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); }
+ $<opval>$ = newANONATTRSUB($2, 0, NULL, $3); }
optlistexpr %prec LSTOP /* ... @bar */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST,
| QWLIST '[' expr ']' /* list literal slice */
{ $$ = newSLICEOP(0, $3, $1); }
| '(' ')' '[' expr ']' /* empty list slice! */
- { $$ = newSLICEOP(0, $4, (OP*)NULL); }
+ { $$ = newSLICEOP(0, $4, NULL); }
;
/* Binary operators between terms */
-termbinop: term ASSIGNOP term /* $x = $y */
+termbinop: term ASSIGNOP term /* $x = $y, $x += $y */
{ $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); }
| term POWOP term /* $x ** $y */
{ $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
anonymous: '[' expr ']'
{ $$ = newANONLIST($2); }
| '[' ']'
- { $$ = newANONLIST((OP*)NULL);}
+ { $$ = newANONLIST(NULL);}
| HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */
{ $$ = newANONHASH($2); }
| HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */
- { $$ = newANONHASH((OP*)NULL); }
+ { $$ = newANONHASH(NULL); }
| ANONSUB startanonsub proto subattrlist block %prec '('
{ SvREFCNT_inc_simple_void(PL_compcv);
$$ = newANONATTRSUB($2, $3, $4, $5); }
{ $$ = newCONDOP(0, $1, $3, $5); }
| REFGEN term /* \$x, \@y, \%z */
{ $$ = newUNOP(OP_REFGEN, 0, $2); }
+ | MY REFGEN term
+ { $$ = newUNOP(OP_REFGEN, 0, localize($3,1)); }
| myattrterm %prec UNIOP
{ $$ = $1; }
| LOCAL term %prec UNIOP
- { $$ = localize($2,$1); }
+ { $$ = localize($2,0); }
| '(' expr ')'
{ $$ = sawparens($2); }
| QWLIST
}
'(' listexpr optrepl ')'
{ $$ = pmruntime($1, $4, $5, 1, $<ival>2); }
- | WORD
+ | BAREWORD
| listop
- | YADAYADA
- {
- $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0),
- newSVOP(OP_CONST, 0, newSVpvs("Unimplemented")));
- }
| PLUGEXPR
;
myattrterm: MY myterm myattrlist
{ $$ = my_attrs($2,$3); }
| MY myterm
- { $$ = localize($2,$1); }
+ { $$ = localize($2,1); }
+ | MY REFGEN myterm myattrlist
+ { $$ = newUNOP(OP_REFGEN, 0, my_attrs($3,$4)); }
;
/* Things that can be "my"'d */
/* Basic list expressions */
optlistexpr: /* NULL */ %prec PREC_LOW
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| listexpr %prec PREC_LOW
{ $$ = $1; }
;
optexpr: /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| expr
{ $$ = $1; }
;
optrepl: /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| '/' expr
{ $$ = $2; }
;
| amper
;
+my_refgen: MY REFGEN
+ | REFGEN MY
+ ;
+
amper : '&' indirob
{ $$ = newCVREF($1,$2); }
;
;
/* Indirect objects */
-indirob : WORD
+indirob : BAREWORD
{ $$ = scalar($1); }
| scalar %prec PREC_LOW
{ $$ = scalar($1); }
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