* 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 <ival> ']' '-' '+' '@' '%' '&' '=' '.'
+%token <ival> PERLY_BRACE_OPEN
+%token <ival> PERLY_BRACE_CLOSE
+%token <ival> PERLY_BRACKET_OPEN
-%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> stmtseq fullstmt labfullstmt barestmt block mblock else
%type <opval> expr term subscripted scalar ary hsh arylen star amper sideff
+%type <opval> condition
%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
%left <ival> ARROW
%nonassoc <ival> ')'
%left <ival> '('
-%left '[' '{'
+%left PERLY_BRACKET_OPEN PERLY_BRACE_OPEN
%% /* RULES */
grammar : GRAMPROG
{
parser->expect = XSTATE;
+ $<ival>$ = 0;
}
remember stmtseq
{
- newPROG(block_end($3,$4));
+ newPROG(block_end($remember,$stmtseq));
PL_compiling.cop_seq = 0;
$$ = 0;
}
| GRAMEXPR
{
parser->expect = XTERM;
+ $<ival>$ = 0;
}
optexpr
{
- PL_eval_root = $3;
+ PL_eval_root = $optexpr;
$$ = 0;
}
| GRAMBLOCK
{
parser->expect = XBLOCK;
+ $<ival>$ = 0;
}
block
{
PL_pad_reset_pending = TRUE;
- PL_eval_root = $3;
+ PL_eval_root = $block;
$$ = 0;
yyunlex();
- parser->yychar = YYEOF;
+ parser->yychar = yytoken = YYEOF;
}
| GRAMBARESTMT
{
parser->expect = XSTATE;
+ $<ival>$ = 0;
}
barestmt
{
PL_pad_reset_pending = TRUE;
- PL_eval_root = $3;
+ PL_eval_root = $barestmt;
$$ = 0;
yyunlex();
- parser->yychar = YYEOF;
+ parser->yychar = yytoken = YYEOF;
}
| GRAMFULLSTMT
{
parser->expect = XSTATE;
+ $<ival>$ = 0;
}
fullstmt
{
PL_pad_reset_pending = TRUE;
- PL_eval_root = $3;
+ PL_eval_root = $fullstmt;
$$ = 0;
yyunlex();
- parser->yychar = YYEOF;
+ parser->yychar = yytoken = YYEOF;
}
| GRAMSTMTSEQ
{
parser->expect = XSTATE;
+ $<ival>$ = 0;
}
stmtseq
{
- PL_eval_root = $3;
+ PL_eval_root = $stmtseq;
+ $$ = 0;
+ }
+ | GRAMSUBSIGNATURE
+ {
+ parser->expect = XSTATE;
+ $<ival>$ = 0;
+ }
+ subsigguts
+ {
+ PL_eval_root = $subsigguts;
$$ = 0;
}
;
/* An ordinary block */
-block : '{' remember stmtseq '}'
- { if (parser->copline > (line_t)$1)
- parser->copline = (line_t)$1;
- $$ = block_end($2, $3);
+block : PERLY_BRACE_OPEN remember stmtseq PERLY_BRACE_CLOSE
+ { if (parser->copline > (line_t)$PERLY_BRACE_OPEN)
+ parser->copline = (line_t)$PERLY_BRACE_OPEN;
+ $$ = block_end($remember, $stmtseq);
}
;
formblock: '=' remember ';' FORMRBRACK formstmtseq ';' '.'
{ if (parser->copline > (line_t)$1)
parser->copline = (line_t)$1;
- $$ = block_end($2, $5);
+ $$ = block_end($remember, $formstmtseq);
}
;
parser->parsed_sub = 0; }
;
-mblock : '{' mremember stmtseq '}'
- { if (parser->copline > (line_t)$1)
- parser->copline = (line_t)$1;
- $$ = block_end($2, $3);
+mblock : PERLY_BRACE_OPEN mremember stmtseq PERLY_BRACE_CLOSE
+ { if (parser->copline > (line_t)$PERLY_BRACE_OPEN)
+ parser->copline = (line_t)$PERLY_BRACE_OPEN;
+ $$ = block_end($mremember, $stmtseq);
}
;
/* A sequence of statements in the program */
stmtseq : /* NULL */
- { $$ = (OP*)NULL; }
- | stmtseq fullstmt
- { $$ = op_append_list(OP_LINESEQ, $1, $2);
+ { $$ = NULL; }
+ | stmtseq[list] fullstmt
+ { $$ = op_append_list(OP_LINESEQ, $list, $fullstmt);
PL_pad_reset_pending = TRUE;
- if ($1 && $2)
+ if ($list && $fullstmt)
PL_hints |= HINT_BLOCK_SCOPE;
}
;
/* A sequence of format lines */
formstmtseq: /* NULL */
- { $$ = (OP*)NULL; }
- | formstmtseq formline
- { $$ = op_append_list(OP_LINESEQ, $1, $2);
+ { $$ = NULL; }
+ | formstmtseq[list] formline
+ { $$ = op_append_list(OP_LINESEQ, $list, $formline);
PL_pad_reset_pending = TRUE;
- if ($1 && $2)
+ if ($list && $formline)
PL_hints |= HINT_BLOCK_SCOPE;
}
;
/* A statement in the program, including optional labels */
fullstmt: barestmt
{
- $$ = $1 ? newSTATEOP(0, NULL, $1) : NULL;
+ $$ = $barestmt ? newSTATEOP(0, NULL, $barestmt) : NULL;
}
| labfullstmt
- { $$ = $1; }
+ { $$ = $labfullstmt; }
;
labfullstmt: LABEL barestmt
{
- $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2);
+ SV *label = cSVOPx_sv($LABEL);
+ $$ = newSTATEOP(SvFLAGS(label) & SVf_UTF8,
+ savepv(SvPVX_const(label)), $barestmt);
+ op_free($LABEL);
}
- | LABEL labfullstmt
+ | LABEL labfullstmt[list]
{
- $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2);
+ SV *label = cSVOPx_sv($LABEL);
+ $$ = newSTATEOP(SvFLAGS(label) & SVf_UTF8,
+ savepv(SvPVX_const(label)), $list);
+ op_free($LABEL);
}
;
/* A bare statement, lacking label and other aspects of state op */
barestmt: PLUGSTMT
- { $$ = $1; }
+ { $$ = $PLUGSTMT; }
| FORMAT startformsub formname formblock
{
CV *fmtcv = PL_compcv;
- newFORM($2, $3, $4);
- $$ = (OP*)NULL;
+ newFORM($startformsub, $formname, $formblock);
+ $$ = NULL;
if (CvOUTSIDE(fmtcv) && !CvEVAL(CvOUTSIDE(fmtcv))) {
pad_add_weakref(fmtcv);
}
parser->parsed_sub = 1;
}
| SUB subname startsub
+ /* sub declaration or definition not within scope
+ of 'use feature "signatures"'*/
{
- if ($2->op_type == OP_CONST) {
- const char *const name =
- SvPV_nolen_const(((SVOP*)$2)->op_sv);
- if (strEQ(name, "BEGIN") || strEQ(name, "END")
- || strEQ(name, "INIT") || strEQ(name, "CHECK")
- || strEQ(name, "UNITCHECK"))
- CvSPECIAL_on(PL_compcv);
- }
- else
- /* State subs inside anonymous subs need to be
- clonable themselves. */
- if (CvANON(CvOUTSIDE(PL_compcv))
- || CvCLONE(CvOUTSIDE(PL_compcv))
- || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST(
- CvOUTSIDE(PL_compcv)
- ))[$2->op_targ]))
- CvCLONE_on(PL_compcv);
+ init_named_cv(PL_compcv, $subname);
parser->in_my = 0;
parser->in_my_stash = NULL;
}
- proto subattrlist optsubbody
+ proto subattrlist optsubbody
{
SvREFCNT_inc_simple_void(PL_compcv);
- $2->op_type == OP_CONST
- ? newATTRSUB($3, $2, $5, $6, $7)
- : newMYSUB($3, $2, $5, $6, $7)
+ $subname->op_type == OP_CONST
+ ? newATTRSUB($startsub, $subname, $proto, $subattrlist, $optsubbody)
+ : newMYSUB($startsub, $subname, $proto, $subattrlist, $optsubbody)
;
- $$ = (OP*)NULL;
+ $$ = NULL;
intro_my();
parser->parsed_sub = 1;
}
- | SUB subname startsub
+ | SIGSUB subname startsub
+ /* sub declaration or definition under 'use feature
+ * "signatures"'. (Note that a signature isn't
+ * allowed in a declaration)
+ */
{
- if ($2->op_type == OP_CONST) {
- const char *const name =
- SvPV_nolen_const(((SVOP*)$2)->op_sv);
- if (strEQ(name, "BEGIN") || strEQ(name, "END")
- || strEQ(name, "INIT") || strEQ(name, "CHECK")
- || strEQ(name, "UNITCHECK"))
- CvSPECIAL_on(PL_compcv);
- }
- else
- /* State subs inside anonymous subs need to be
- clonable themselves. */
- if (CvANON(CvOUTSIDE(PL_compcv))
- || CvCLONE(CvOUTSIDE(PL_compcv))
- || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST(
- CvOUTSIDE(PL_compcv)
- ))[$2->op_targ]))
- CvCLONE_on(PL_compcv);
+ init_named_cv(PL_compcv, $subname);
parser->in_my = 0;
parser->in_my_stash = NULL;
}
- remember subsignature subattrlist '{' stmtseq '}'
+ subattrlist optsigsubbody
{
- OP *body;
- if (parser->copline > (line_t)$8)
- parser->copline = (line_t)$8;
- body = block_end($5,
- op_append_list(OP_LINESEQ, $6, $9));
-
SvREFCNT_inc_simple_void(PL_compcv);
- $2->op_type == OP_CONST
- ? newATTRSUB($3, $2, NULL, $7, body)
- : newMYSUB($3, $2, NULL, $7, body)
+ $subname->op_type == OP_CONST
+ ? newATTRSUB($startsub, $subname, NULL, $subattrlist, $optsigsubbody)
+ : newMYSUB( $startsub, $subname, NULL, $subattrlist, $optsigsubbody)
;
- $$ = (OP*)NULL;
+ $$ = NULL;
intro_my();
parser->parsed_sub = 1;
}
- | PACKAGE WORD WORD ';'
+ | PACKAGE BAREWORD[version] BAREWORD[package] ';'
{
- package($3);
- if ($2)
- package_version($2);
- $$ = (OP*)NULL;
+ package($package);
+ if ($version)
+ package_version($version);
+ $$ = NULL;
}
| USE startsub
{ CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ }
- WORD WORD optlistexpr ';'
+ BAREWORD[version] BAREWORD[module] optlistexpr ';'
{
SvREFCNT_inc_simple_void(PL_compcv);
- utilize($1, $2, $4, $5, $6);
+ utilize($USE, $startsub, $version, $module, $optlistexpr);
parser->parsed_sub = 1;
- $$ = (OP*)NULL;
+ $$ = NULL;
}
| IF '(' remember mexpr ')' mblock else
{
- $$ = block_end($3,
- newCONDOP(0, $4, op_scope($6), $7));
- parser->copline = (line_t)$1;
+ $$ = block_end($remember,
+ newCONDOP(0, $mexpr, op_scope($mblock), $else));
+ parser->copline = (line_t)$IF;
}
| UNLESS '(' remember mexpr ')' mblock else
{
- $$ = block_end($3,
- newCONDOP(0, $4, $7, op_scope($6)));
- parser->copline = (line_t)$1;
+ $$ = block_end($remember,
+ newCONDOP(0, $mexpr, $else, op_scope($mblock)));
+ parser->copline = (line_t)$UNLESS;
}
| GIVEN '(' remember mexpr ')' mblock
{
- $$ = block_end($3, newGIVENOP($4, op_scope($6), 0));
- parser->copline = (line_t)$1;
+ $$ = block_end($remember, newGIVENOP($mexpr, op_scope($mblock), 0));
+ parser->copline = (line_t)$GIVEN;
}
| WHEN '(' remember mexpr ')' mblock
- { $$ = block_end($3, newWHENOP($4, op_scope($6))); }
+ { $$ = block_end($remember, newWHENOP($mexpr, op_scope($mblock))); }
| DEFAULT block
- { $$ = newWHENOP(0, op_scope($2)); }
+ { $$ = newWHENOP(0, op_scope($block)); }
| WHILE '(' remember texpr ')' mintro mblock cont
{
- $$ = block_end($3,
- newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
- $4, $7, $8, $6));
- parser->copline = (line_t)$1;
+ $$ = block_end($remember,
+ newWHILEOP(0, 1, NULL,
+ $texpr, $mblock, $cont, $mintro));
+ parser->copline = (line_t)$WHILE;
}
| UNTIL '(' remember iexpr ')' mintro mblock cont
{
- $$ = block_end($3,
- newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
- $4, $7, $8, $6));
- parser->copline = (line_t)$1;
+ $$ = block_end($remember,
+ newWHILEOP(0, 1, NULL,
+ $iexpr, $mblock, $cont, $mintro));
+ parser->copline = (line_t)$UNTIL;
}
- | FOR '(' remember mnexpr ';'
+ | FOR '(' remember mnexpr[init_mnexpr] ';'
{ parser->expect = XTERM; }
texpr ';'
{ parser->expect = XTERM; }
- mintro mnexpr ')'
+ mintro mnexpr[iterate_mnexpr] ')'
mblock
{
- OP *initop = $4;
- OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
- scalar($7), $13, $11, $10);
+ OP *initop = $init_mnexpr;
+ OP *forop = newWHILEOP(0, 1, NULL,
+ scalar($texpr), $mblock, $iterate_mnexpr, $mintro);
if (initop) {
forop = op_prepend_elem(OP_LINESEQ, initop,
op_append_elem(OP_LINESEQ,
forop));
}
PL_hints |= HINT_BLOCK_SCOPE;
- $$ = block_end($3, forop);
- parser->copline = (line_t)$1;
+ $$ = block_end($remember, forop);
+ parser->copline = (line_t)$FOR;
}
| FOR MY remember my_scalar '(' mexpr ')' mblock cont
{
- $$ = block_end($3, newFOROP(0, $4, $6, $8, $9));
- parser->copline = (line_t)$1;
+ $$ = block_end($remember, newFOROP(0, $my_scalar, $mexpr, $mblock, $cont));
+ parser->copline = (line_t)$FOR;
}
| FOR scalar '(' remember mexpr ')' mblock cont
{
- $$ = block_end($4, newFOROP(0,
- op_lvalue($2, OP_ENTERLOOP), $5, $7, $8));
- parser->copline = (line_t)$1;
+ $$ = block_end($remember, newFOROP(0,
+ op_lvalue($scalar, OP_ENTERLOOP), $mexpr, $mblock, $cont));
+ parser->copline = (line_t)$FOR;
}
- | FOR REFGEN MY remember my_var
- { parser->in_my = 0; $<opval>$ = my($5); }
+ | FOR my_refgen remember my_var
+ { parser->in_my = 0; $<opval>$ = my($my_var); }[variable]
'(' mexpr ')' mblock cont
{
$$ = block_end(
- $4,
+ $remember,
newFOROP(0,
op_lvalue(
newUNOP(OP_REFGEN, 0,
- $<opval>6),
+ $<opval>variable),
OP_ENTERLOOP),
- $8, $10, $11)
+ $mexpr, $mblock, $cont)
);
- parser->copline = (line_t)$1;
+ parser->copline = (line_t)$FOR;
}
| FOR REFGEN refgen_topic '(' remember mexpr ')' mblock cont
{
- $$ = block_end($5, newFOROP(
+ $$ = block_end($remember, newFOROP(
0, op_lvalue(newUNOP(OP_REFGEN, 0,
- $3),
- OP_ENTERLOOP), $6, $8, $9));
- parser->copline = (line_t)$1;
+ $refgen_topic),
+ OP_ENTERLOOP), $mexpr, $mblock, $cont));
+ parser->copline = (line_t)$FOR;
}
| FOR '(' remember mexpr ')' mblock cont
{
- $$ = block_end($3,
- newFOROP(0, (OP*)NULL, $4, $6, $7));
- parser->copline = (line_t)$1;
+ $$ = block_end($remember,
+ newFOROP(0, NULL, $mexpr, $mblock, $cont));
+ parser->copline = (line_t)$FOR;
}
| 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, $block, $cont, 0);
}
- | PACKAGE WORD WORD '{' remember
+ | PACKAGE BAREWORD[version] BAREWORD[package] PERLY_BRACE_OPEN remember
{
- package($3);
- if ($2) {
- package_version($2);
+ package($package);
+ if ($version) {
+ package_version($version);
}
}
- stmtseq '}'
+ stmtseq PERLY_BRACE_CLOSE
{
/* a block is a loop that happens once */
- $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
- (OP*)NULL, block_end($5, $7), (OP*)NULL, 0);
- if (parser->copline > (line_t)$4)
- parser->copline = (line_t)$4;
+ $$ = newWHILEOP(0, 1, NULL,
+ NULL, block_end($remember, $stmtseq), NULL, 0);
+ if (parser->copline > (line_t)$PERLY_BRACE_OPEN)
+ parser->copline = (line_t)$PERLY_BRACE_OPEN;
}
| sideff ';'
{
- $$ = $1;
+ $$ = $sideff;
+ }
+ | YADAYADA ';'
+ {
+ $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0),
+ newSVOP(OP_CONST, 0, newSVpvs("Unimplemented")));
}
| ';'
{
- $$ = (OP*)NULL;
+ $$ = NULL;
parser->copline = NOLINE;
}
;
/* Format line */
formline: THING formarg
{ OP *list;
- if ($2) {
- OP *term = $2;
- list = op_append_elem(OP_LIST, $1, term);
+ if ($formarg) {
+ OP *term = $formarg;
+ list = op_append_elem(OP_LIST, $THING, term);
}
else {
- list = $1;
+ list = $THING;
}
if (parser->copline == NOLINE)
parser->copline = CopLINE(PL_curcop)-1;
formarg : /* NULL */
{ $$ = NULL; }
| FORMLBRACK stmtseq FORMRBRACK
- { $$ = op_unscope($2); }
+ { $$ = op_unscope($stmtseq); }
;
+condition: expr
+;
+
/* An expression which may have a side-effect */
sideff : error
- { $$ = (OP*)NULL; }
- | expr
- { $$ = $1; }
- | expr IF expr
- { $$ = newLOGOP(OP_AND, 0, $3, $1); }
- | expr UNLESS expr
- { $$ = newLOGOP(OP_OR, 0, $3, $1); }
- | expr WHILE expr
- { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); }
- | expr UNTIL iexpr
- { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1); }
- | expr FOR expr
- { $$ = newFOROP(0, (OP*)NULL, $3, $1, (OP*)NULL);
- parser->copline = (line_t)$2; }
- | expr WHEN expr
- { $$ = newWHENOP($3, op_scope($1)); }
+ { $$ = NULL; }
+ | expr[body]
+ { $$ = $body; }
+ | expr[body] IF condition
+ { $$ = newLOGOP(OP_AND, 0, $condition, $body); }
+ | expr[body] UNLESS condition
+ { $$ = newLOGOP(OP_OR, 0, $condition, $body); }
+ | expr[body] WHILE condition
+ { $$ = newLOOPOP(OPf_PARENS, 1, scalar($condition), $body); }
+ | expr[body] UNTIL iexpr
+ { $$ = newLOOPOP(OPf_PARENS, 1, $iexpr, $body); }
+ | expr[body] FOR condition
+ { $$ = newFOROP(0, NULL, $condition, $body, NULL);
+ parser->copline = (line_t)$FOR; }
+ | expr[body] WHEN condition
+ { $$ = newWHENOP($condition, op_scope($body)); }
;
/* else and elsif blocks */
else : /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| ELSE mblock
{
- ($2)->op_flags |= OPf_PARENS;
- $$ = op_scope($2);
+ ($mblock)->op_flags |= OPf_PARENS;
+ $$ = op_scope($mblock);
}
- | ELSIF '(' mexpr ')' mblock else
- { parser->copline = (line_t)$1;
+ | ELSIF '(' mexpr ')' mblock else[else.recurse]
+ { parser->copline = (line_t)$ELSIF;
$$ = newCONDOP(0,
- newSTATEOP(OPf_SPECIAL,NULL,$3),
- op_scope($5), $6);
+ newSTATEOP(OPf_SPECIAL,NULL,$mexpr),
+ op_scope($mblock), $[else.recurse]);
PL_hints |= HINT_BLOCK_SCOPE;
}
;
/* Continue blocks */
cont : /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| CONTINUE block
- { $$ = op_scope($2); }
+ { $$ = op_scope($block); }
;
/* determine whether there are any new my declarations */
/* Normal expression */
nexpr : /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| sideff
;
/* Inverted boolean expression */
iexpr : expr
- { $$ = invert(scalar($1)); }
+ { $$ = invert(scalar($expr)); }
;
/* Expression with its own lexical scope */
mexpr : expr
- { $$ = $1; intro_my(); }
+ { $$ = $expr; intro_my(); }
;
mnexpr : nexpr
- { $$ = $1; intro_my(); }
+ { $$ = $nexpr; intro_my(); }
;
-formname: WORD { $$ = $1; }
- | /* NULL */ { $$ = (OP*)NULL; }
+formname: BAREWORD { $$ = $BAREWORD; }
+ | /* 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; }
+ { $$ = $THING; }
| COLONATTR
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
;
/* List of attributes for a "my" variable declaration */
myattrlist: COLONATTR THING
- { $$ = $2; }
+ { $$ = $THING; }
| COLONATTR
- { $$ = (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; $$ = $PRIVATEREF; }
+ ;
+
+sigslurpsigil:
+ '@'
+ { $$ = '@'; }
+ | '%'
+ { $$ = '%'; }
+
+/* @, %, @foo, %foo */
+sigslurpelem: sigslurpsigil sigvarname sigdefault/* def only to catch errors */
+ {
+ I32 sigil = $sigslurpsigil;
+ OP *var = $sigvarname;
+ OP *defexpr = $sigdefault;
+
+ if (parser->sig_slurpy)
+ yyerror("Multiple slurpy parameters not allowed");
+ parser->sig_slurpy = (char)sigil;
+
+ if (defexpr)
+ yyerror("A slurpy parameter may not have "
+ "a default value");
+
+ $$ = 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
+ { $$ = $term; }
+
+
+/* subroutine signature scalar element: e.g. '$x', '$=', '$x = $default' */
+sigscalarelem:
+ '$' sigvarname sigdefault
+ {
+ OP *var = $sigvarname;
+ OP *defexpr = $sigdefault;
+
+ if (parser->sig_slurpy)
+ yyerror("Slurpy parameter not last");
+
+ parser->sig_elems++;
+
+ if (defexpr) {
+ parser->sig_optelems++;
+
+ if ( defexpr->op_type == OP_NULL
+ && !(defexpr->op_flags & OPf_KIDS))
+ {
+ /* handle '$=' special case */
+ if (var)
+ yyerror("Optional parameter "
+ "lacks default expression");
+ op_free(defexpr);
+ }
+ else {
+ /* a normal '=default' expression */
+ OP *defop = (OP*)alloc_LOGOP(OP_ARGDEFELEM,
+ defexpr,
+ LINKLIST(defexpr));
+ /* re-purpose op_targ to hold @_ index */
+ defop->op_targ =
+ (PADOFFSET)(parser->sig_elems - 1);
+
+ if (var) {
+ var->op_flags |= OPf_STACKED;
+ (void)op_sibling_splice(var,
+ NULL, 0, defop);
+ scalar(defop);
+ }
+ else
+ var = newUNOP(OP_NULL, 0, defop);
+
+ LINKLIST(var);
+ /* NB: normally the first child of a
+ * logop is executed before the logop,
+ * and it pushes a boolean result
+ * ready for the logop. For ARGDEFELEM,
+ * the op itself does the boolean
+ * calculation, so set the first op to
+ * it instead.
+ */
+ var->op_next = defop;
+ defexpr->op_next = var;
+ }
+ }
+ else {
+ if (parser->sig_optelems)
+ yyerror("Mandatory parameter "
+ "follows optional parameter");
+ }
+
+ $$ = var ? newSTATEOP(0, NULL, var) : NULL;
+ }
+ ;
+
+
+/* subroutine signature element: e.g. '$x = $default' or '%h' */
+sigelem: sigscalarelem
+ { parser->in_my = KEY_sigvar; $$ = $sigscalarelem; }
+ | sigslurpelem
+ { parser->in_my = KEY_sigvar; $$ = $sigslurpelem; }
+ ;
+
+/* list of subroutine signature elements */
+siglist:
+ siglist[list] ','
+ { $$ = $list; }
+ | siglist[list] ',' sigelem[element]
+ {
+ $$ = op_append_list(OP_LINESEQ, $list, $element);
}
- ')'
+ | sigelem[element] %prec PREC_LOW
+ { $$ = $element; }
+ ;
+
+/* () or (....) */
+siglistornull: /* NULL */
+ { $$ = NULL; }
+ | siglist
+ { $$ = $siglist; }
+
+/* optional subroutine signature */
+optsubsignature: /* NULL */
+ { $$ = NULL; }
+ | subsignature
+ { $$ = $subsignature; }
+
+/* Subroutine signature */
+subsignature: '(' subsigguts ')'
+ { $$ = $subsigguts; }
+
+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
{
- $$ = op_append_list(OP_LINESEQ, $<opval>2,
- newSTATEOP(0, NULL, sawparens(newNULLLIST())));
- parser->expect = XATTRBLOCK;
+ OP *sigops = $siglistornull;
+ struct op_argcheck_aux *aux;
+ OP *check;
+
+ if (!FEATURE_SIGNATURES_IS_ENABLED)
+ Perl_croak(aTHX_ "Experimental "
+ "subroutine signatures not enabled");
+
+ /* We shouldn't get here otherwise */
+ Perl_ck_warner_d(aTHX_
+ packWARN(WARN_EXPERIMENTAL__SIGNATURES),
+ "The signatures feature is experimental");
+
+ aux = (struct op_argcheck_aux*)
+ PerlMemShared_malloc(
+ sizeof(struct op_argcheck_aux));
+ aux->params = parser->sig_elems;
+ aux->opt_params = parser->sig_optelems;
+ aux->slurpy = parser->sig_slurpy;
+ check = newUNOP_AUX(OP_ARGCHECK, 0, NULL,
+ (UNOP_AUX_item *)aux);
+ sigops = op_prepend_elem(OP_LINESEQ, check, sigops);
+ sigops = op_prepend_elem(OP_LINESEQ,
+ newSTATEOP(0, NULL, NULL),
+ sigops);
+ /* a nextstate at the end handles context
+ * correctly for an empty sub body */
+ sigops = op_append_elem(OP_LINESEQ,
+ sigops,
+ newSTATEOP(0, NULL, NULL));
+ /* wrap the list of arg ops in a NULL aux op.
+ This serves two purposes. First, it makes
+ the arg list a separate subtree from the
+ body of the sub, and secondly the null op
+ may in future be upgraded to an OP_SIGNATURE
+ when implemented. For now leave it as
+ ex-argcheck */
+ $$ = 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 { $$ = $subbody; }
+ | ';' { $$ = NULL; }
+ ;
+
+
+/* Subroutine body (without signature) */
+subbody: remember PERLY_BRACE_OPEN stmtseq PERLY_BRACE_CLOSE
+ {
+ if (parser->copline > (line_t)$PERLY_BRACE_OPEN)
+ parser->copline = (line_t)$PERLY_BRACE_OPEN;
+ $$ = block_end($remember, $stmtseq);
+ }
;
+
+/* optional [ Subroutine body with optional signature ] (for named
+ * subroutine declaration) */
+optsigsubbody: sigsubbody { $$ = $sigsubbody; }
+ | ';' { $$ = NULL; }
+
+/* Subroutine body with optional signature */
+sigsubbody: remember optsubsignature PERLY_BRACE_OPEN stmtseq PERLY_BRACE_CLOSE
+ {
+ if (parser->copline > (line_t)$PERLY_BRACE_OPEN)
+ parser->copline = (line_t)$PERLY_BRACE_OPEN;
+ $$ = block_end($remember,
+ op_append_list(OP_LINESEQ, $optsubsignature, $stmtseq));
+ }
+ ;
+
+
/* Ordinary expressions; logical combinations */
-expr : expr ANDOP expr
- { $$ = newLOGOP(OP_AND, 0, $1, $3); }
- | expr OROP expr
- { $$ = newLOGOP($2, 0, $1, $3); }
- | expr DOROP expr
- { $$ = newLOGOP(OP_DOR, 0, $1, $3); }
+expr : expr[lhs] ANDOP expr[rhs]
+ { $$ = newLOGOP(OP_AND, 0, $lhs, $rhs); }
+ | expr[lhs] OROP[operator] expr[rhs]
+ { $$ = newLOGOP($operator, 0, $lhs, $rhs); }
+ | expr[lhs] DOROP expr[rhs]
+ { $$ = newLOGOP(OP_DOR, 0, $lhs, $rhs); }
| listexpr %prec PREC_LOW
;
/* Expressions are a list of terms joined by commas */
-listexpr: listexpr ','
- { $$ = $1; }
- | listexpr ',' term
+listexpr: listexpr[list] ','
+ { $$ = $list; }
+ | listexpr[list] ',' term
{
- OP* term = $3;
- $$ = op_append_elem(OP_LIST, $1, term);
+ OP* term = $term;
+ $$ = op_append_elem(OP_LIST, $list, term);
}
| term %prec PREC_LOW
;
/* List operators */
listop : LSTOP indirob listexpr /* map {...} @args or print $fh @args */
- { $$ = op_convert_list($1, OPf_STACKED,
- op_prepend_elem(OP_LIST, newGVREF($1,$2), $3) );
+ { $$ = op_convert_list($LSTOP, OPf_STACKED,
+ op_prepend_elem(OP_LIST, newGVREF($LSTOP,$indirob), $listexpr) );
}
| FUNC '(' indirob expr ')' /* print ($fh @args */
- { $$ = op_convert_list($1, OPf_STACKED,
- op_prepend_elem(OP_LIST, newGVREF($1,$3), $4) );
+ { $$ = op_convert_list($FUNC, OPf_STACKED,
+ op_prepend_elem(OP_LIST, newGVREF($FUNC,$indirob), $expr) );
}
| term ARROW method '(' optexpr ')' /* $foo->bar(list) */
{ $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST,
- op_prepend_elem(OP_LIST, scalar($1), $5),
- newMETHOP(OP_METHOD, 0, $3)));
+ op_prepend_elem(OP_LIST, scalar($term), $optexpr),
+ newMETHOP(OP_METHOD, 0, $method)));
}
| term ARROW method /* $foo->bar */
{ $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED,
- op_append_elem(OP_LIST, scalar($1),
- newMETHOP(OP_METHOD, 0, $3)));
+ op_append_elem(OP_LIST, scalar($term),
+ newMETHOP(OP_METHOD, 0, $method)));
}
| METHOD indirob optlistexpr /* new Class @args */
{ $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST,
- op_prepend_elem(OP_LIST, $2, $3),
- newMETHOP(OP_METHOD, 0, $1)));
+ op_prepend_elem(OP_LIST, $indirob, $optlistexpr),
+ newMETHOP(OP_METHOD, 0, $METHOD)));
}
| FUNCMETH indirob '(' optexpr ')' /* method $object (@args) */
{ $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST,
- op_prepend_elem(OP_LIST, $2, $4),
- newMETHOP(OP_METHOD, 0, $1)));
+ op_prepend_elem(OP_LIST, $indirob, $optexpr),
+ newMETHOP(OP_METHOD, 0, $FUNCMETH)));
}
| LSTOP optlistexpr /* print @args */
- { $$ = op_convert_list($1, 0, $2); }
+ { $$ = op_convert_list($LSTOP, 0, $optlistexpr); }
| FUNC '(' optexpr ')' /* print (@args) */
- { $$ = op_convert_list($1, 0, $3); }
+ { $$ = op_convert_list($FUNC, 0, $optexpr); }
+ | FUNC SUBLEXSTART optexpr SUBLEXEND /* uc($arg) from "\U..." */
+ { $$ = op_convert_list($FUNC, 0, $optexpr); }
| LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */
{ SvREFCNT_inc_simple_void(PL_compcv);
- $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); }
+ $<opval>$ = newANONATTRSUB($startanonsub, 0, NULL, $block); }[anonattrsub]
optlistexpr %prec LSTOP /* ... @bar */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST,
- op_prepend_elem(OP_LIST, $<opval>4, $5), $1));
+ op_prepend_elem(OP_LIST, $<opval>anonattrsub, $optlistexpr), $LSTOPSUB));
}
;
;
/* Some kind of subscripted expression */
-subscripted: gelem '{' expr ';' '}' /* *main::{something} */
+subscripted: gelem PERLY_BRACE_OPEN expr ';' PERLY_BRACE_CLOSE /* *main::{something} */
/* In this and all the hash accessors, ';' is
* provided by the tokeniser */
- { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); }
- | scalar '[' expr ']' /* $array[$element] */
- { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3));
+ { $$ = newBINOP(OP_GELEM, 0, $gelem, scalar($expr)); }
+ | scalar[array] PERLY_BRACKET_OPEN expr ']' /* $array[$element] */
+ { $$ = newBINOP(OP_AELEM, 0, oopsAV($array), scalar($expr));
}
- | term ARROW '[' expr ']' /* somearef->[$element] */
+ | term[array_reference] ARROW PERLY_BRACKET_OPEN expr ']' /* somearef->[$element] */
{ $$ = newBINOP(OP_AELEM, 0,
- ref(newAVREF($1),OP_RV2AV),
- scalar($4));
+ ref(newAVREF($array_reference),OP_RV2AV),
+ scalar($expr));
}
- | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */
+ | subscripted[array_reference] PERLY_BRACKET_OPEN expr ']' /* $foo->[$bar]->[$baz] */
{ $$ = newBINOP(OP_AELEM, 0,
- ref(newAVREF($1),OP_RV2AV),
- scalar($3));
+ ref(newAVREF($array_reference),OP_RV2AV),
+ scalar($expr));
}
- | scalar '{' expr ';' '}' /* $foo{bar();} */
- { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3));
+ | scalar[hash] PERLY_BRACE_OPEN expr ';' PERLY_BRACE_CLOSE /* $foo{bar();} */
+ { $$ = newBINOP(OP_HELEM, 0, oopsHV($hash), jmaybe($expr));
}
- | term ARROW '{' expr ';' '}' /* somehref->{bar();} */
+ | term[hash_reference] ARROW PERLY_BRACE_OPEN expr ';' PERLY_BRACE_CLOSE /* somehref->{bar();} */
{ $$ = newBINOP(OP_HELEM, 0,
- ref(newHVREF($1),OP_RV2HV),
- jmaybe($4)); }
- | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */
+ ref(newHVREF($hash_reference),OP_RV2HV),
+ jmaybe($expr)); }
+ | subscripted[hash_reference] PERLY_BRACE_OPEN expr ';' PERLY_BRACE_CLOSE /* $foo->[bar]->{baz;} */
{ $$ = newBINOP(OP_HELEM, 0,
- ref(newHVREF($1),OP_RV2HV),
- jmaybe($3)); }
- | term ARROW '(' ')' /* $subref->() */
+ ref(newHVREF($hash_reference),OP_RV2HV),
+ jmaybe($expr)); }
+ | term[code_reference] ARROW '(' ')' /* $subref->() */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- newCVREF(0, scalar($1))); }
- | term ARROW '(' expr ')' /* $subref->(@args) */
+ newCVREF(0, scalar($code_reference)));
+ if (parser->expect == XBLOCK)
+ parser->expect = XOPERATOR;
+ }
+ | term[code_reference] ARROW '(' expr ')' /* $subref->(@args) */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- op_append_elem(OP_LIST, $4,
- newCVREF(0, scalar($1)))); }
+ op_append_elem(OP_LIST, $expr,
+ newCVREF(0, scalar($code_reference))));
+ if (parser->expect == XBLOCK)
+ parser->expect = XOPERATOR;
+ }
- | subscripted '(' expr ')' /* $foo->{bar}->(@args) */
+ | subscripted[code_reference] '(' expr ')' /* $foo->{bar}->(@args) */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- op_append_elem(OP_LIST, $3,
- newCVREF(0, scalar($1)))); }
- | subscripted '(' ')' /* $foo->{bar}->() */
+ op_append_elem(OP_LIST, $expr,
+ newCVREF(0, scalar($code_reference))));
+ if (parser->expect == XBLOCK)
+ parser->expect = XOPERATOR;
+ }
+ | subscripted[code_reference] '(' ')' /* $foo->{bar}->() */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- newCVREF(0, scalar($1))); }
- | '(' expr ')' '[' expr ']' /* list slice */
- { $$ = newSLICEOP(0, $5, $2); }
- | QWLIST '[' expr ']' /* list literal slice */
- { $$ = newSLICEOP(0, $3, $1); }
- | '(' ')' '[' expr ']' /* empty list slice! */
- { $$ = newSLICEOP(0, $4, (OP*)NULL); }
+ newCVREF(0, scalar($code_reference)));
+ if (parser->expect == XBLOCK)
+ parser->expect = XOPERATOR;
+ }
+ | '(' expr[list] ')' PERLY_BRACKET_OPEN expr[slice] ']' /* list slice */
+ { $$ = newSLICEOP(0, $slice, $list); }
+ | QWLIST PERLY_BRACKET_OPEN expr ']' /* list literal slice */
+ { $$ = newSLICEOP(0, $expr, $QWLIST); }
+ | '(' ')' PERLY_BRACKET_OPEN expr ']' /* empty list slice! */
+ { $$ = newSLICEOP(0, $expr, NULL); }
;
/* Binary operators between terms */
-termbinop: term ASSIGNOP term /* $x = $y */
- { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); }
- | term POWOP term /* $x ** $y */
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term MULOP term /* $x * $y, $x x $y */
- { if ($2 != OP_REPEAT)
- scalar($1);
- $$ = newBINOP($2, 0, $1, scalar($3));
- }
- | term ADDOP term /* $x + $y */
- { $$ = 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 */
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term BITANDOP term /* $x & $y */
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term BITOROP term /* $x | $y */
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term DOTDOT term /* $x..$y, $x...$y */
- { $$ = newRANGE($2, scalar($1), scalar($3)); }
- | term ANDAND term /* $x && $y */
- { $$ = newLOGOP(OP_AND, 0, $1, $3); }
- | term OROR term /* $x || $y */
- { $$ = newLOGOP(OP_OR, 0, $1, $3); }
- | term DORDOR term /* $x // $y */
- { $$ = newLOGOP(OP_DOR, 0, $1, $3); }
- | term MATCHOP term /* $x =~ /$y/ */
- { $$ = bind_match($2, $1, $3); }
+termbinop: term[lhs] ASSIGNOP term[rhs] /* $x = $y, $x += $y */
+ { $$ = newASSIGNOP(OPf_STACKED, $lhs, $ASSIGNOP, $rhs); }
+ | term[lhs] POWOP term[rhs] /* $x ** $y */
+ { $$ = newBINOP($POWOP, 0, scalar($lhs), scalar($rhs)); }
+ | term[lhs] MULOP term[rhs] /* $x * $y, $x x $y */
+ { if ($MULOP != OP_REPEAT)
+ scalar($lhs);
+ $$ = newBINOP($MULOP, 0, $lhs, scalar($rhs));
+ }
+ | term[lhs] ADDOP term[rhs] /* $x + $y */
+ { $$ = newBINOP($ADDOP, 0, scalar($lhs), scalar($rhs)); }
+ | term[lhs] SHIFTOP term[rhs] /* $x >> $y, $x << $y */
+ { $$ = newBINOP($SHIFTOP, 0, scalar($lhs), scalar($rhs)); }
+ | termrelop %prec PREC_LOW /* $x > $y, etc. */
+ { $$ = $termrelop; }
+ | termeqop %prec PREC_LOW /* $x == $y, $x cmp $y */
+ { $$ = $termeqop; }
+ | term[lhs] BITANDOP term[rhs] /* $x & $y */
+ { $$ = newBINOP($BITANDOP, 0, scalar($lhs), scalar($rhs)); }
+ | term[lhs] BITOROP term[rhs] /* $x | $y */
+ { $$ = newBINOP($BITOROP, 0, scalar($lhs), scalar($rhs)); }
+ | term[lhs] DOTDOT term[rhs] /* $x..$y, $x...$y */
+ { $$ = newRANGE($DOTDOT, scalar($lhs), scalar($rhs)); }
+ | term[lhs] ANDAND term[rhs] /* $x && $y */
+ { $$ = newLOGOP(OP_AND, 0, $lhs, $rhs); }
+ | term[lhs] OROR term[rhs] /* $x || $y */
+ { $$ = newLOGOP(OP_OR, 0, $lhs, $rhs); }
+ | term[lhs] DORDOR term[rhs] /* $x // $y */
+ { $$ = newLOGOP(OP_DOR, 0, $lhs, $rhs); }
+ | term[lhs] MATCHOP term[rhs] /* $x =~ /$y/ */
+ { $$ = bind_match($MATCHOP, $lhs, $rhs); }
;
+termrelop: relopchain %prec PREC_LOW
+ { $$ = cmpchain_finish($relopchain); }
+ | term[lhs] NCRELOP term[rhs]
+ { $$ = newBINOP($NCRELOP, 0, scalar($lhs), scalar($rhs)); }
+ | termrelop NCRELOP
+ { yyerror("syntax error"); YYERROR; }
+ | termrelop CHRELOP
+ { yyerror("syntax error"); YYERROR; }
+ ;
+
+relopchain: term[lhs] CHRELOP term[rhs]
+ { $$ = cmpchain_start($CHRELOP, $lhs, $rhs); }
+ | relopchain[lhs] CHRELOP term[rhs]
+ { $$ = cmpchain_extend($CHRELOP, $lhs, $rhs); }
+ ;
+
+termeqop: eqopchain %prec PREC_LOW
+ { $$ = cmpchain_finish($eqopchain); }
+ | term[lhs] NCEQOP term[rhs]
+ { $$ = newBINOP($NCEQOP, 0, scalar($lhs), scalar($rhs)); }
+ | termeqop NCEQOP
+ { yyerror("syntax error"); YYERROR; }
+ | termeqop CHEQOP
+ { yyerror("syntax error"); YYERROR; }
+ ;
+
+eqopchain: term[lhs] CHEQOP term[rhs]
+ { $$ = cmpchain_start($CHEQOP, $lhs, $rhs); }
+ | eqopchain[lhs] CHEQOP term[rhs]
+ { $$ = cmpchain_extend($CHEQOP, $lhs, $rhs); }
+ ;
+
/* Unary operators and terms */
termunop : '-' term %prec UMINUS /* -$x */
- { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); }
+ { $$ = newUNOP(OP_NEGATE, 0, scalar($term)); }
| '+' term %prec UMINUS /* +$x */
- { $$ = $2; }
+ { $$ = $term; }
| '!' term /* !$x */
- { $$ = newUNOP(OP_NOT, 0, scalar($2)); }
+ { $$ = newUNOP(OP_NOT, 0, scalar($term)); }
| '~' term /* ~$x */
- { $$ = newUNOP($1, 0, scalar($2)); }
+ { $$ = newUNOP($1, 0, scalar($term)); }
| term POSTINC /* $x++ */
{ $$ = newUNOP(OP_POSTINC, 0,
- op_lvalue(scalar($1), OP_POSTINC)); }
+ op_lvalue(scalar($term), OP_POSTINC)); }
| term POSTDEC /* $x-- */
{ $$ = newUNOP(OP_POSTDEC, 0,
- op_lvalue(scalar($1), OP_POSTDEC));}
+ op_lvalue(scalar($term), OP_POSTDEC));}
| term POSTJOIN /* implicit join after interpolated ->@ */
{ $$ = op_convert_list(OP_JOIN, 0,
op_append_elem(
newSVOP(OP_CONST,0,
newSVpvs("\""))
)),
- $1
+ $term
));
}
| PREINC term /* ++$x */
{ $$ = newUNOP(OP_PREINC, 0,
- op_lvalue(scalar($2), OP_PREINC)); }
+ op_lvalue(scalar($term), OP_PREINC)); }
| PREDEC term /* --$x */
{ $$ = newUNOP(OP_PREDEC, 0,
- op_lvalue(scalar($2), OP_PREDEC)); }
+ op_lvalue(scalar($term), OP_PREDEC)); }
;
/* Constructors for anonymous data */
-anonymous: '[' expr ']'
- { $$ = newANONLIST($2); }
- | '[' ']'
- { $$ = newANONLIST((OP*)NULL);}
- | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */
- { $$ = newANONHASH($2); }
- | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */
- { $$ = newANONHASH((OP*)NULL); }
- | ANONSUB startanonsub proto subattrlist block %prec '('
+anonymous: PERLY_BRACKET_OPEN expr ']'
+ { $$ = newANONLIST($expr); }
+ | PERLY_BRACKET_OPEN ']'
+ { $$ = newANONLIST(NULL);}
+ | HASHBRACK expr ';' PERLY_BRACE_CLOSE %prec '(' /* { foo => "Bar" } */
+ { $$ = newANONHASH($expr); }
+ | HASHBRACK ';' PERLY_BRACE_CLOSE %prec '(' /* { } (';' by tokener) */
+ { $$ = newANONHASH(NULL); }
+ | ANONSUB startanonsub proto subattrlist subbody %prec '('
{ SvREFCNT_inc_simple_void(PL_compcv);
- $$ = 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);
- $$ = newANONATTRSUB($2, NULL, $5, body);
- }
-
+ $$ = newANONATTRSUB($startanonsub, $proto, $subattrlist, $subbody); }
+ | ANON_SIGSUB startanonsub subattrlist sigsubbody %prec '('
+ { SvREFCNT_inc_simple_void(PL_compcv);
+ $$ = newANONATTRSUB($startanonsub, NULL, $subattrlist, $sigsubbody); }
;
/* Things called with "do" */
termdo : DO term %prec UNIOP /* do $filename */
- { $$ = dofile($2, $1);}
+ { $$ = dofile($term, $DO);}
| DO block %prec '(' /* do { code */
- { $$ = newUNOP(OP_NULL, OPf_SPECIAL, op_scope($2));}
+ { $$ = newUNOP(OP_NULL, OPf_SPECIAL, op_scope($block));}
;
-term : termbinop
+term[product] : termbinop
| termunop
| anonymous
| termdo
- | term '?' term ':' term
- { $$ = newCONDOP(0, $1, $3, $5); }
- | REFGEN term /* \$x, \@y, \%z */
- { $$ = newUNOP(OP_REFGEN, 0, $2); }
+ | term[condition] '?' term[then] ':' term[else]
+ { $$ = newCONDOP(0, $condition, $then, $else); }
+ | REFGEN term[operand] /* \$x, \@y, \%z */
+ { $$ = newUNOP(OP_REFGEN, 0, $operand); }
+ | MY REFGEN term[operand]
+ { $$ = newUNOP(OP_REFGEN, 0, localize($operand,1)); }
| myattrterm %prec UNIOP
- { $$ = $1; }
- | LOCAL term %prec UNIOP
- { $$ = localize($2,$1); }
+ { $$ = $myattrterm; }
+ | LOCAL term[operand] %prec UNIOP
+ { $$ = localize($operand,0); }
| '(' expr ')'
- { $$ = sawparens($2); }
+ { $$ = sawparens($expr); }
| QWLIST
- { $$ = $1; }
+ { $$ = $QWLIST; }
| '(' ')'
{ $$ = sawparens(newNULLLIST()); }
| scalar %prec '('
- { $$ = $1; }
+ { $$ = $scalar; }
| star %prec '('
- { $$ = $1; }
+ { $$ = $star; }
| hsh %prec '('
- { $$ = $1; }
+ { $$ = $hsh; }
| ary %prec '('
- { $$ = $1; }
+ { $$ = $ary; }
| arylen %prec '(' /* $#x, $#{ something } */
- { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));}
+ { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($arylen, OP_AV2ARYLEN));}
| subscripted
- { $$ = $1; }
- | sliceme '[' expr ']' /* array slice */
+ { $$ = $subscripted; }
+ | sliceme PERLY_BRACKET_OPEN expr ']' /* array slice */
{ $$ = op_prepend_elem(OP_ASLICE,
newOP(OP_PUSHMARK, 0),
newLISTOP(OP_ASLICE, 0,
- list($3),
- ref($1, OP_ASLICE)));
- if ($$ && $1)
+ list($expr),
+ ref($sliceme, OP_ASLICE)));
+ if ($$ && $sliceme)
$$->op_private |=
- $1->op_private & OPpSLICEWARNING;
+ $sliceme->op_private & OPpSLICEWARNING;
}
- | kvslice '[' expr ']' /* array key/value slice */
+ | kvslice PERLY_BRACKET_OPEN expr ']' /* array key/value slice */
{ $$ = op_prepend_elem(OP_KVASLICE,
newOP(OP_PUSHMARK, 0),
newLISTOP(OP_KVASLICE, 0,
- list($3),
- ref(oopsAV($1), OP_KVASLICE)));
- if ($$ && $1)
+ list($expr),
+ ref(oopsAV($kvslice), OP_KVASLICE)));
+ if ($$ && $kvslice)
$$->op_private |=
- $1->op_private & OPpSLICEWARNING;
+ $kvslice->op_private & OPpSLICEWARNING;
}
- | sliceme '{' expr ';' '}' /* @hash{@keys} */
+ | sliceme PERLY_BRACE_OPEN expr ';' PERLY_BRACE_CLOSE /* @hash{@keys} */
{ $$ = op_prepend_elem(OP_HSLICE,
newOP(OP_PUSHMARK, 0),
newLISTOP(OP_HSLICE, 0,
- list($3),
- ref(oopsHV($1), OP_HSLICE)));
- if ($$ && $1)
+ list($expr),
+ ref(oopsHV($sliceme), OP_HSLICE)));
+ if ($$ && $sliceme)
$$->op_private |=
- $1->op_private & OPpSLICEWARNING;
+ $sliceme->op_private & OPpSLICEWARNING;
}
- | kvslice '{' expr ';' '}' /* %hash{@keys} */
+ | kvslice PERLY_BRACE_OPEN expr ';' PERLY_BRACE_CLOSE /* %hash{@keys} */
{ $$ = op_prepend_elem(OP_KVHSLICE,
newOP(OP_PUSHMARK, 0),
newLISTOP(OP_KVHSLICE, 0,
- list($3),
- ref($1, OP_KVHSLICE)));
- if ($$ && $1)
+ list($expr),
+ ref($kvslice, OP_KVHSLICE)));
+ if ($$ && $kvslice)
$$->op_private |=
- $1->op_private & OPpSLICEWARNING;
+ $kvslice->op_private & OPpSLICEWARNING;
}
| THING %prec '('
- { $$ = $1; }
+ { $$ = $THING; }
| amper /* &foo; */
- { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); }
+ { $$ = newUNOP(OP_ENTERSUB, 0, scalar($amper)); }
| amper '(' ')' /* &foo() or foo() */
- { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1));
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($amper));
}
| amper '(' expr ')' /* &foo(@args) or foo(@args) */
{
$$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- op_append_elem(OP_LIST, $3, scalar($1)));
+ op_append_elem(OP_LIST, $expr, scalar($amper)));
}
| NOAMP subname optlistexpr /* foo @args (no parens) */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- op_append_elem(OP_LIST, $3, scalar($2)));
- }
- | term ARROW '$' '*'
- { $$ = newSVREF($1); }
- | term ARROW '@' '*'
- { $$ = newAVREF($1); }
- | term ARROW '%' '*'
- { $$ = newHVREF($1); }
- | term ARROW '&' '*'
+ op_append_elem(OP_LIST, $optlistexpr, scalar($subname)));
+ }
+ | term[operand] ARROW '$' '*'
+ { $$ = newSVREF($operand); }
+ | term[operand] ARROW '@' '*'
+ { $$ = newAVREF($operand); }
+ | term[operand] ARROW '%' '*'
+ { $$ = newHVREF($operand); }
+ | term[operand] ARROW '&' '*'
{ $$ = newUNOP(OP_ENTERSUB, 0,
- scalar(newCVREF($3,$1))); }
- | term ARROW '*' '*' %prec '('
- { $$ = newGVREF(0,$1); }
+ scalar(newCVREF($3,$operand))); }
+ | term[operand] ARROW '*' '*' %prec '('
+ { $$ = newGVREF(0,$operand); }
| LOOPEX /* loop exiting command (goto, last, dump, etc) */
- { $$ = newOP($1, OPf_SPECIAL);
+ { $$ = newOP($LOOPEX, OPf_SPECIAL);
PL_hints |= HINT_BLOCK_SCOPE; }
- | LOOPEX term
- { $$ = newLOOPEX($1,$2); }
+ | LOOPEX term[operand]
+ { $$ = newLOOPEX($LOOPEX,$operand); }
| NOTOP listexpr /* not $foo */
- { $$ = newUNOP(OP_NOT, 0, scalar($2)); }
+ { $$ = newUNOP(OP_NOT, 0, scalar($listexpr)); }
| UNIOP /* Unary op, $_ implied */
- { $$ = newOP($1, 0); }
+ { $$ = newOP($UNIOP, 0); }
| UNIOP block /* eval { foo }* */
- { $$ = newUNOP($1, 0, $2); }
- | UNIOP term /* Unary op */
- { $$ = newUNOP($1, 0, $2); }
+ { $$ = newUNOP($UNIOP, 0, $block); }
+ | UNIOP term[operand] /* Unary op */
+ { $$ = newUNOP($UNIOP, 0, $operand); }
| REQUIRE /* require, $_ implied */
- { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); }
- | REQUIRE term /* require Foo */
- { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); }
+ { $$ = newOP(OP_REQUIRE, $REQUIRE ? OPf_SPECIAL : 0); }
+ | REQUIRE term[operand] /* require Foo */
+ { $$ = newUNOP(OP_REQUIRE, $REQUIRE ? OPf_SPECIAL : 0, $operand); }
| UNIOPSUB
- { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); }
- | UNIOPSUB term /* Sub treated as unop */
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($UNIOPSUB)); }
+ | UNIOPSUB term[operand] /* Sub treated as unop */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- op_append_elem(OP_LIST, $2, scalar($1))); }
+ op_append_elem(OP_LIST, $operand, scalar($UNIOPSUB))); }
| FUNC0 /* Nullary operator */
- { $$ = newOP($1, 0); }
+ { $$ = newOP($FUNC0, 0); }
| FUNC0 '(' ')'
- { $$ = newOP($1, 0);}
+ { $$ = newOP($FUNC0, 0);}
| FUNC0OP /* Same as above, but op created in toke.c */
- { $$ = $1; }
+ { $$ = $FUNC0OP; }
| FUNC0OP '(' ')'
- { $$ = $1; }
+ { $$ = $FUNC0OP; }
| FUNC0SUB /* Sub treated as nullop */
- { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); }
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($FUNC0SUB)); }
| FUNC1 '(' ')' /* not () */
- { $$ = ($1 == OP_NOT)
- ? newUNOP($1, 0, newSVOP(OP_CONST, 0, newSViv(0)))
- : newOP($1, OPf_SPECIAL); }
+ { $$ = ($FUNC1 == OP_NOT)
+ ? newUNOP($FUNC1, 0, newSVOP(OP_CONST, 0, newSViv(0)))
+ : newOP($FUNC1, OPf_SPECIAL); }
| FUNC1 '(' expr ')' /* not($foo) */
- { $$ = newUNOP($1, 0, $3); }
+ { $$ = newUNOP($FUNC1, 0, $expr); }
| PMFUNC /* m//, s///, qr//, tr/// */
{
- if ( $1->op_type != OP_TRANS
- && $1->op_type != OP_TRANSR
- && (((PMOP*)$1)->op_pmflags & PMf_HAS_CV))
+ if ( $PMFUNC->op_type != OP_TRANS
+ && $PMFUNC->op_type != OP_TRANSR
+ && (((PMOP*)$PMFUNC)->op_pmflags & PMf_HAS_CV))
{
$<ival>$ = start_subparse(FALSE, CVf_ANON);
SAVEFREESV(PL_compcv);
} else
$<ival>$ = 0;
}
- '(' listexpr optrepl ')'
- { $$ = pmruntime($1, $4, $5, 1, $<ival>2); }
- | WORD
+ SUBLEXSTART listexpr optrepl SUBLEXEND
+ { $$ = pmruntime($PMFUNC, $listexpr, $optrepl, 1, $<ival>2); }
+ | BAREWORD
| listop
- | YADAYADA
- {
- $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0),
- newSVOP(OP_CONST, 0, newSVpvs("Unimplemented")));
- }
| PLUGEXPR
;
/* "my" declarations, with optional attributes */
myattrterm: MY myterm myattrlist
- { $$ = my_attrs($2,$3); }
+ { $$ = my_attrs($myterm,$myattrlist); }
| MY myterm
- { $$ = localize($2,$1); }
+ { $$ = localize($myterm,1); }
+ | MY REFGEN myterm myattrlist
+ { $$ = newUNOP(OP_REFGEN, 0, my_attrs($myterm,$myattrlist)); }
;
/* Things that can be "my"'d */
myterm : '(' expr ')'
- { $$ = sawparens($2); }
+ { $$ = sawparens($expr); }
| '(' ')'
{ $$ = sawparens(newNULLLIST()); }
| scalar %prec '('
- { $$ = $1; }
+ { $$ = $scalar; }
| hsh %prec '('
- { $$ = $1; }
+ { $$ = $hsh; }
| ary %prec '('
- { $$ = $1; }
+ { $$ = $ary; }
;
/* Basic list expressions */
optlistexpr: /* NULL */ %prec PREC_LOW
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| listexpr %prec PREC_LOW
- { $$ = $1; }
+ { $$ = $listexpr; }
;
optexpr: /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| expr
- { $$ = $1; }
+ { $$ = $expr; }
;
optrepl: /* NULL */
- { $$ = (OP*)NULL; }
+ { $$ = NULL; }
| '/' expr
- { $$ = $2; }
+ { $$ = $expr; }
;
/* A little bit of trickery to make "for my $foo (@bar)" actually be
lexical */
my_scalar: scalar
- { parser->in_my = 0; $$ = my($1); }
+ { parser->in_my = 0; $$ = my($scalar); }
;
my_var : scalar
| amper
;
+my_refgen: MY REFGEN
+ | REFGEN MY
+ ;
+
amper : '&' indirob
- { $$ = newCVREF($1,$2); }
+ { $$ = newCVREF($1,$indirob); }
;
scalar : '$' indirob
- { $$ = newSVREF($2); }
+ { $$ = newSVREF($indirob); }
;
ary : '@' indirob
- { $$ = newAVREF($2);
+ { $$ = newAVREF($indirob);
if ($$) $$->op_private |= $1;
}
;
hsh : '%' indirob
- { $$ = newHVREF($2);
+ { $$ = newHVREF($indirob);
if ($$) $$->op_private |= $1;
}
;
arylen : DOLSHARP indirob
- { $$ = newAVREF($2); }
+ { $$ = newAVREF($indirob); }
| term ARROW DOLSHARP '*'
- { $$ = newAVREF($1); }
+ { $$ = newAVREF($term); }
;
star : '*' indirob
- { $$ = newGVREF(0,$2); }
+ { $$ = newGVREF(0,$indirob); }
;
sliceme : ary
| term ARROW '@'
- { $$ = newAVREF($1); }
+ { $$ = newAVREF($term); }
;
kvslice : hsh
| term ARROW '%'
- { $$ = newHVREF($1); }
+ { $$ = newHVREF($term); }
;
gelem : star
| term ARROW '*'
- { $$ = newGVREF(0,$1); }
+ { $$ = newGVREF(0,$term); }
;
/* Indirect objects */
-indirob : WORD
- { $$ = scalar($1); }
+indirob : BAREWORD
+ { $$ = scalar($BAREWORD); }
| scalar %prec PREC_LOW
- { $$ = scalar($1); }
+ { $$ = scalar($scalar); }
| block
- { $$ = op_scope($1); }
+ { $$ = op_scope($block); }
| PRIVATEREF
- { $$ = $1; }
+ { $$ = $PRIVATEREF; }
;
https://perl5.git.perl.org / perl5.git / blobdiff