* 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> 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 WHERESO
+%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> termbinop termunop anonymous termdo
+%type <opval> termrelop relopchain termeqop eqopchain
%type <ival> sigslurpsigil
%type <opval> sigvarname sigdefault sigscalarelem sigslurpelem
-%type <opval> sigelem siglist siglistornull subsignature
+%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> 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
PL_eval_root = $3;
$$ = 0;
}
+ | GRAMSUBSIGNATURE
+ {
+ parser->expect = XSTATE;
+ $<ival>$ = 0;
+ }
+ subsigguts
+ {
+ PL_eval_root = $3;
+ $$ = 0;
+ }
;
/* An ordinary block */
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);
}
;
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
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)
;
$$ = NULL;
intro_my();
$$ = block_end($3, newGIVENOP($4, op_scope($6), 0));
parser->copline = (line_t)$1;
}
- | WHERESO '(' remember mexpr ')' mblock
- {
- OP *cond = $4;
- if ($1)
- cond = newBINOP(OP_SMARTMATCH, 0, newDEFSVOP(),
- scalar(cond));
- $$ = block_end($3, newWHERESOOP(cond, op_scope($6)));
- }
+ | WHEN '(' remember mexpr ')' mblock
+ { $$ = block_end($3, newWHENOP($4, op_scope($6))); }
+ | DEFAULT block
+ { $$ = newWHENOP(0, op_scope($2)); }
| WHILE '(' remember texpr ')' mintro mblock cont
{
$$ = block_end($3,
| expr FOR expr
{ $$ = newFOROP(0, NULL, $3, $1, NULL);
parser->copline = (line_t)$2; }
- | expr WHERESO expr
- {
- OP *cond = $3;
- if ($2)
- cond = newBINOP(OP_SMARTMATCH, 0, newDEFSVOP(),
- scalar(cond));
- $$ = newWHERESOOP(cond, op_scope($1));
- }
+ | expr WHEN expr
+ { $$ = newWHENOP($3, op_scope($1)); }
;
/* else and elsif blocks */
| siglist
{ $$ = $1; }
+/* optional subroutine signature */
+optsubsignature: /* NULL */
+ { $$ = NULL; }
+ | subsignature
+ { $$ = $1; }
+
/* Subroutine signature */
-subsignature: '('
+subsignature: '(' subsigguts ')'
+ { $$ = $2; }
+
+subsigguts:
{
ENTER;
SAVEIV(parser->sig_elems);
parser->in_my = KEY_sigvar;
}
siglistornull
- ')'
{
- OP *sigops = $3;
- UNOP_AUX_item *aux;
+ OP *sigops = $2;
+ struct op_argcheck_aux *aux;
OP *check;
- if (!parser->error_count) {
- assert(FEATURE_SIGNATURES_IS_ENABLED);
- }
+ if (!FEATURE_SIGNATURES_IS_ENABLED)
+ Perl_croak(aTHX_ "Experimental "
+ "subroutine signatures not enabled");
/* We shouldn't get here otherwise */
Perl_ck_warner_d(aTHX_
packWARN(WARN_EXPERIMENTAL__SIGNATURES),
"The signatures feature is experimental");
- aux = (UNOP_AUX_item*)PerlMemShared_malloc(
- sizeof(UNOP_AUX_item) * 3);
- aux[0].iv = parser->sig_elems;
- aux[1].iv = parser->sig_optelems;
- aux[2].iv = parser->sig_slurpy;
- check = newUNOP_AUX(OP_ARGCHECK, 0, NULL, aux);
+ aux = (struct op_argcheck_aux*)
+ PerlMemShared_malloc(
+ sizeof(struct op_argcheck_aux));
+ aux->params = parser->sig_elems;
+ aux->opt_params = parser->sig_optelems;
+ aux->slurpy = parser->sig_slurpy;
+ check = newUNOP_AUX(OP_ARGCHECK, 0, NULL,
+ (UNOP_AUX_item *)aux);
sigops = op_prepend_elem(OP_LINESEQ, check, sigops);
sigops = op_prepend_elem(OP_LINESEQ,
newSTATEOP(0, NULL, NULL),
sigops);
/* a nextstate at the end handles context
* correctly for an empty sub body */
- $$ = op_append_elem(OP_LINESEQ,
+ 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: subbody { $$ = $1; }
+ | ';' { $$ = NULL; }
+ ;
-/* Optional subroutine body, for named subroutine declaration */
-optsubbody: block
- | ';' { $$ = NULL; }
+/* Subroutine body (without signature) */
+subbody: remember '{' stmtseq '}'
+ {
+ if (parser->copline > (line_t)$2)
+ parser->copline = (line_t)$2;
+ $$ = 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..." */
+ { $$ = op_convert_list($1, 0, $3); }
| LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */
{ SvREFCNT_inc_simple_void(PL_compcv);
$<opval>$ = newANONATTRSUB($2, 0, NULL, $3); }
jmaybe($3)); }
| term ARROW '(' ')' /* $subref->() */
{ $$ = 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 */
{ $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
| term SHIFTOP term /* $x >> $y, $x << $y */
{ $$ = 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 */
{ $$ = newUNOP(OP_NEGATE, 0, scalar($2)); }
{ $$ = newANONHASH($2); }
| HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */
{ $$ = newANONHASH(NULL); }
- | ANONSUB startanonsub proto subattrlist block %prec '('
+ | ANONSUB startanonsub proto subattrlist subbody %prec '('
{ SvREFCNT_inc_simple_void(PL_compcv);
$$ = 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" */
} else
$<ival>$ = 0;
}
- '(' listexpr optrepl ')'
+ SUBLEXSTART listexpr optrepl SUBLEXEND
{ $$ = pmruntime($1, $4, $5, 1, $<ival>2); }
| BAREWORD
| listop
https://perl5.git.perl.org / perl5.git / blobdiff