* to run regen_perly.pl, which re-creates the files perly.h, perly.tab
* and perly.act which are derived from this.
*
- * The main job of of this grammar is to call the various newFOO()
+ * The main job 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.
*
/* Make the parser re-entrant. */
-%pure_parser
+%define api.pure
%start grammar
GV *gvval;
}
-%token <ival> GRAMPROG GRAMEXPR GRAMBLOCK GRAMBARESTMT GRAMFULLSTMT GRAMSTMTSEQ
+%token <ival> GRAMPROG GRAMEXPR GRAMBLOCK GRAMBARESTMT GRAMFULLSTMT GRAMSTMTSEQ GRAMSUBSIGNATURE
%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
-%token <ival> FORMAT SUB ANONSUB PACKAGE USE
+%token <opval> LABEL
+%token <ival> FORMAT SUB SIGSUB ANONSUB ANON_SIGSUB PACKAGE USE
%token <ival> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR
%token <ival> GIVEN WHEN DEFAULT
%token <ival> LOOPEX DOTDOT YADAYADA
%token <ival> FUNC0 FUNC1 FUNC UNIOP LSTOP
-%token <ival> RELOP EQOP MULOP ADDOP
+%token <ival> MULOP ADDOP
%token <ival> DOLSHARP DO HASHBRACK NOAMP
%token <ival> LOCAL MY REQUIRE
%token <ival> COLONATTR FORMLBRACK FORMRBRACK
+%token <ival> SUBLEXSTART SUBLEXEND
%type <ival> grammar remember mremember
%type <ival> startsub startanonsub startformsub
%type <opval> sliceme kvslice gelem
%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> formname subname proto 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 <opval> termrelop relopchain termeqop eqopchain
+%type <ival> sigslurpsigil
+%type <opval> sigvarname sigdefault sigscalarelem sigslurpelem
+%type <opval> sigelem siglist siglistornull subsigguts subsignature optsubsignature
+%type <opval> subbody optsubbody sigsubbody optsigsubbody
%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
%left <ival> BITANDOP
-%nonassoc EQOP
-%nonassoc RELOP
+%left <ival> CHEQOP NCEQOP
+%left <ival> CHRELOP NCRELOP
%nonassoc UNIOP UNIOPSUB
%nonassoc REQUIRE
%left <ival> SHIFTOP
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;
$$ = 0;
yyunlex();
- parser->yychar = YYEOF;
+ parser->yychar = yytoken = YYEOF;
}
| GRAMSTMTSEQ
{
parser->expect = XSTATE;
+ $<ival>$ = 0;
}
stmtseq
{
PL_eval_root = $3;
$$ = 0;
}
+ | GRAMSUBSIGNATURE
+ {
+ parser->expect = XSTATE;
+ $<ival>$ = 0;
+ }
+ subsigguts
+ {
+ PL_eval_root = $3;
+ $$ = 0;
+ }
;
/* An ordinary block */
/* A sequence of statements in the program */
stmtseq : /* NULL */
- { $$ = (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
{ $$ = op_append_list(OP_LINESEQ, $1, $2);
PL_pad_reset_pending = TRUE;
labfullstmt: LABEL barestmt
{
- $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2);
+ SV *label = cSVOPx_sv($1);
+ $$ = newSTATEOP(SvFLAGS(label) & SVf_UTF8,
+ savepv(SvPVX_const(label)), $2);
+ op_free($1);
}
| LABEL labfullstmt
{
- $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2);
+ SV *label = cSVOPx_sv($1);
+ $$ = newSTATEOP(SvFLAGS(label) & SVf_UTF8,
+ savepv(SvPVX_const(label)), $2);
+ op_free($1);
}
;
{
CV *fmtcv = PL_compcv;
newFORM($2, $3, $4);
- $$ = (OP*)NULL;
+ $$ = NULL;
if (CvOUTSIDE(fmtcv) && !CvEVAL(CvOUTSIDE(fmtcv))) {
pad_add_weakref(fmtcv);
}
parser->parsed_sub = 1;
}
| SUB subname startsub
+ /* sub declaration or definition not within scope
+ of 'use feature "signatures"'*/
{
- if ($2->op_type == OP_CONST) {
- const char *const name =
- SvPV_nolen_const(((SVOP*)$2)->op_sv);
- if (strEQ(name, "BEGIN") || strEQ(name, "END")
- || strEQ(name, "INIT") || strEQ(name, "CHECK")
- || strEQ(name, "UNITCHECK"))
- CvSPECIAL_on(PL_compcv);
- }
- else
- /* State subs inside anonymous subs need to be
- clonable themselves. */
- if (CvANON(CvOUTSIDE(PL_compcv))
- || CvCLONE(CvOUTSIDE(PL_compcv))
- || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST(
- CvOUTSIDE(PL_compcv)
- ))[$2->op_targ]))
- CvCLONE_on(PL_compcv);
+ init_named_cv(PL_compcv, $2);
parser->in_my = 0;
parser->in_my_stash = NULL;
}
- proto subattrlist optsubbody
+ proto subattrlist optsubbody
{
SvREFCNT_inc_simple_void(PL_compcv);
$2->op_type == OP_CONST
? newATTRSUB($3, $2, $5, $6, $7)
: newMYSUB($3, $2, $5, $6, $7)
;
- $$ = (OP*)NULL;
+ $$ = NULL;
intro_my();
parser->parsed_sub = 1;
}
- | SUB subname startsub
+ | SIGSUB subname startsub
+ /* sub declaration or definition under 'use feature
+ * "signatures"'. (Note that a signature isn't
+ * allowed in a declaration)
+ */
{
- if ($2->op_type == OP_CONST) {
- const char *const name =
- SvPV_nolen_const(((SVOP*)$2)->op_sv);
- if (strEQ(name, "BEGIN") || strEQ(name, "END")
- || strEQ(name, "INIT") || strEQ(name, "CHECK")
- || strEQ(name, "UNITCHECK"))
- CvSPECIAL_on(PL_compcv);
- }
- else
- /* State subs inside anonymous subs need to be
- clonable themselves. */
- if (CvANON(CvOUTSIDE(PL_compcv))
- || CvCLONE(CvOUTSIDE(PL_compcv))
- || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST(
- CvOUTSIDE(PL_compcv)
- ))[$2->op_targ]))
- CvCLONE_on(PL_compcv);
+ init_named_cv(PL_compcv, $2);
parser->in_my = 0;
parser->in_my_stash = NULL;
}
- remember subsignature subattrlist '{' stmtseq '}'
+ subattrlist optsigsubbody
{
- OP *body;
- if (parser->copline > (line_t)$8)
- parser->copline = (line_t)$8;
- body = block_end($5,
- op_append_list(OP_LINESEQ, $6, $9));
-
SvREFCNT_inc_simple_void(PL_compcv);
$2->op_type == OP_CONST
- ? newATTRSUB($3, $2, NULL, $7, body)
- : newMYSUB($3, $2, NULL, $7, body)
+ ? newATTRSUB($3, $2, NULL, $5, $6)
+ : newMYSUB( $3, $2, NULL, $5, $6)
;
- $$ = (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;
+ $$ = NULL;
}
| IF '(' remember mexpr ')' mblock else
{
| WHILE '(' remember texpr ')' mintro mblock cont
{
$$ = 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(); }
;
-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; }
+
+/* optional subroutine signature */
+optsubsignature: /* NULL */
+ { $$ = NULL; }
+ | subsignature
+ { $$ = $1; }
+
+/* Subroutine signature */
+subsignature: '(' subsigguts ')'
+ { $$ = $2; }
+
+subsigguts:
+ {
+ ENTER;
+ SAVEIV(parser->sig_elems);
+ SAVEIV(parser->sig_optelems);
+ SAVEI8(parser->sig_slurpy);
+ parser->sig_elems = 0;
+ parser->sig_optelems = 0;
+ parser->sig_slurpy = 0;
+ parser->in_my = KEY_sigvar;
+ }
+ siglistornull
{
- $$ = op_append_list(OP_LINESEQ, $<opval>2,
- newSTATEOP(0, NULL, sawparens(newNULLLIST())));
- parser->expect = XATTRBLOCK;
+ OP *sigops = $2;
+ struct op_argcheck_aux *aux;
+ OP *check;
+
+ if (!FEATURE_SIGNATURES_IS_ENABLED)
+ Perl_croak(aTHX_ "Experimental "
+ "subroutine signatures not enabled");
+
+ /* We shouldn't get here otherwise */
+ Perl_ck_warner_d(aTHX_
+ packWARN(WARN_EXPERIMENTAL__SIGNATURES),
+ "The signatures feature is experimental");
+
+ aux = (struct op_argcheck_aux*)
+ PerlMemShared_malloc(
+ sizeof(struct op_argcheck_aux));
+ aux->params = parser->sig_elems;
+ aux->opt_params = parser->sig_optelems;
+ aux->slurpy = parser->sig_slurpy;
+ check = newUNOP_AUX(OP_ARGCHECK, 0, NULL,
+ (UNOP_AUX_item *)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 */
+ sigops = op_append_elem(OP_LINESEQ,
+ sigops,
+ newSTATEOP(0, NULL, NULL));
+ /* wrap the list of arg ops in a NULL aux op.
+ This serves two purposes. First, it makes
+ the arg list a separate subtree from the
+ body of the sub, and secondly the null op
+ may in future be upgraded to an OP_SIGNATURE
+ when implemented. For now leave it as
+ ex-argcheck */
+ $$ = newUNOP_AUX(OP_ARGCHECK, 0, sigops, NULL);
+ op_null($$);
+
+ parser->in_my = 0;
+ /* tell the toker that attrributes can follow
+ * this sig, but only so that the toker
+ * can skip through any (illegal) trailing
+ * attribute text then give a useful error
+ * message about "attributes before sig",
+ * rather than falling over ina mess at
+ * unrecognised syntax.
+ */
+ parser->expect = XATTRBLOCK;
+ parser->sig_seen = TRUE;
+ LEAVE;
}
;
-/* Optional subroutine body, for named subroutine declaration */
-optsubbody: block
- | ';' { $$ = (OP*)NULL; }
+/* Optional subroutine body (for named subroutine declaration) */
+optsubbody: subbody { $$ = $1; }
+ | ';' { $$ = NULL; }
+ ;
+
+
+/* Subroutine body (without signature) */
+subbody: remember '{' stmtseq '}'
+ {
+ if (parser->copline > (line_t)$2)
+ parser->copline = (line_t)$2;
+ $$ = block_end($1, $3);
+ }
;
+
+/* optional [ Subroutine body with optional signature ] (for named
+ * subroutine declaration) */
+optsigsubbody: sigsubbody { $$ = $1; }
+ | ';' { $$ = NULL; }
+
+/* Subroutine body with optional signature */
+sigsubbody: remember optsubsignature '{' stmtseq '}'
+ {
+ if (parser->copline > (line_t)$3)
+ parser->copline = (line_t)$3;
+ $$ = block_end($1,
+ op_append_list(OP_LINESEQ, $2, $4));
+ }
+ ;
+
+
/* Ordinary expressions; logical combinations */
expr : expr ANDOP expr
{ $$ = newLOGOP(OP_AND, 0, $1, $3); }
{ $$ = op_convert_list($1, 0, $2); }
| FUNC '(' optexpr ')' /* print (@args) */
{ $$ = op_convert_list($1, 0, $3); }
+ | FUNC SUBLEXSTART optexpr SUBLEXEND /* uc($arg) from "\U..." */
+ { $$ = op_convert_list($1, 0, $3); }
| LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */
{ SvREFCNT_inc_simple_void(PL_compcv);
- $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); }
+ $<opval>$ = newANONATTRSUB($2, 0, NULL, $3); }
optlistexpr %prec LSTOP /* ... @bar */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST,
jmaybe($3)); }
| term ARROW '(' ')' /* $subref->() */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- newCVREF(0, scalar($1))); }
+ newCVREF(0, scalar($1)));
+ if (parser->expect == XBLOCK)
+ parser->expect = XOPERATOR;
+ }
| term ARROW '(' expr ')' /* $subref->(@args) */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST, $4,
- newCVREF(0, scalar($1)))); }
+ newCVREF(0, scalar($1))));
+ if (parser->expect == XBLOCK)
+ parser->expect = XOPERATOR;
+ }
| subscripted '(' expr ')' /* $foo->{bar}->(@args) */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST, $3,
- newCVREF(0, scalar($1)))); }
+ newCVREF(0, scalar($1))));
+ if (parser->expect == XBLOCK)
+ parser->expect = XOPERATOR;
+ }
| subscripted '(' ')' /* $foo->{bar}->() */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- newCVREF(0, scalar($1))); }
+ newCVREF(0, scalar($1)));
+ if (parser->expect == XBLOCK)
+ parser->expect = XOPERATOR;
+ }
| '(' expr ')' '[' expr ']' /* list slice */
{ $$ = newSLICEOP(0, $5, $2); }
| QWLIST '[' expr ']' /* list literal slice */
{ $$ = 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)); }
{ $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
| term SHIFTOP term /* $x >> $y, $x << $y */
{ $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term RELOP term /* $x > $y, etc. */
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term EQOP term /* $x == $y, $x eq $y */
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
+ | termrelop %prec PREC_LOW /* $x > $y, etc. */
+ { $$ = $1; }
+ | termeqop %prec PREC_LOW /* $x == $y, $x cmp $y */
+ { $$ = $1; }
| term BITANDOP term /* $x & $y */
{ $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
| term BITOROP term /* $x | $y */
{ $$ = bind_match($2, $1, $3); }
;
+termrelop: relopchain %prec PREC_LOW
+ { $$ = cmpchain_finish($1); }
+ | term NCRELOP term
+ { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
+ | termrelop NCRELOP
+ { yyerror("syntax error"); YYERROR; }
+ | termrelop CHRELOP
+ { yyerror("syntax error"); YYERROR; }
+ ;
+
+relopchain: term CHRELOP term
+ { $$ = cmpchain_start($2, $1, $3); }
+ | relopchain CHRELOP term
+ { $$ = cmpchain_extend($2, $1, $3); }
+ ;
+
+termeqop: eqopchain %prec PREC_LOW
+ { $$ = cmpchain_finish($1); }
+ | term NCEQOP term
+ { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
+ | termeqop NCEQOP
+ { yyerror("syntax error"); YYERROR; }
+ | termeqop CHEQOP
+ { yyerror("syntax error"); YYERROR; }
+ ;
+
+eqopchain: term CHEQOP term
+ { $$ = cmpchain_start($2, $1, $3); }
+ | eqopchain CHEQOP term
+ { $$ = cmpchain_extend($2, $1, $3); }
+ ;
+
/* Unary operators and terms */
termunop : '-' term %prec UMINUS /* -$x */
{ $$ = newUNOP(OP_NEGATE, 0, scalar($2)); }
anonymous: '[' expr ']'
{ $$ = newANONLIST($2); }
| '[' ']'
- { $$ = newANONLIST((OP*)NULL);}
+ { $$ = newANONLIST(NULL);}
| HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */
{ $$ = newANONHASH($2); }
| HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */
- { $$ = newANONHASH((OP*)NULL); }
- | ANONSUB startanonsub proto subattrlist block %prec '('
+ { $$ = newANONHASH(NULL); }
+ | ANONSUB startanonsub proto subattrlist subbody %prec '('
{ SvREFCNT_inc_simple_void(PL_compcv);
$$ = newANONATTRSUB($2, $3, $4, $5); }
- | ANONSUB startanonsub remember subsignature subattrlist '{' stmtseq '}' %prec '('
- {
- OP *body;
- if (parser->copline > (line_t)$6)
- parser->copline = (line_t)$6;
- body = block_end($3,
- op_append_list(OP_LINESEQ, $4, $7));
- SvREFCNT_inc_simple_void(PL_compcv);
- $$ = newANONATTRSUB($2, NULL, $5, body);
- }
-
+ | ANON_SIGSUB startanonsub subattrlist sigsubbody %prec '('
+ { SvREFCNT_inc_simple_void(PL_compcv);
+ $$ = newANONATTRSUB($2, NULL, $3, $4); }
;
/* Things called with "do" */
{ $$ = newCONDOP(0, $1, $3, $5); }
| REFGEN term /* \$x, \@y, \%z */
{ $$ = 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 ')'
{ $$ = sawparens($2); }
| QWLIST
} else
$<ival>$ = 0;
}
- '(' listexpr optrepl ')'
+ SUBLEXSTART listexpr optrepl SUBLEXEND
{ $$ = 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); }
https://perl5.git.perl.org / perl5.git / blobdiff