X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/a7aaec61655ef1580eb319cf234db0f3d5c9981e..a4f8ff4607cb674cb0c6feeb56b8eb80bbe28259:/perly.y diff --git a/perly.y b/perly.y index cc27ee2..4b73977 100644 --- a/perly.y +++ b/perly.y @@ -1,7 +1,7 @@ /* perly.y * * Copyright (c) 1991-2002, 2003, 2004, 2005, 2006 Larry Wall - * Copyright (c) 2007, 2008 by Larry Wall and others + * Copyright (c) 2007, 2008, 2009, 2010, 2011 by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. @@ -20,20 +20,6 @@ * to run regen_perly.pl, which re-creates the files perly.h, perly.tab * and perly.act which are derived from this. * - * Note that these derived files are included and compiled twice; once - * from perly.c, and once from madly.c. The second time, a number of MAD - * macros are defined, which compile in extra code that allows the parse - * tree to be accurately dumped. In particular: - * - * MAD defined if compiling madly.c - * DO_MAD(A) expands to A under madly.c, to null otherwise - * IF_MAD(a,b) expands to A under madly.c, to B otherwise - * TOKEN_GETMAD() expands to token_getmad() under madly.c, to null otherwise - * TOKEN_FREE() similarly - * OP_GETMAD() similarly - * IVAL(i) expands to (i)->tk_lval.ival or (i) - * PVAL(p) expands to (p)->tk_lval.pval or (p) - * * The main job of of this grammar is to call the various newFOO() * functions in op.c to build a syntax tree of OP structs. * It relies on the lexer in toke.c to do the tokenizing. @@ -47,8 +33,6 @@ %pure_parser -/* FIXME for MAD - is the new mintro on while and until important? */ - %start grammar %union { @@ -57,95 +41,127 @@ char *pval; OP *opval; GV *gvval; -#ifdef PERL_IN_MADLY_C - TOKEN* p_tkval; - TOKEN* i_tkval; -#else - char *p_tkval; - I32 i_tkval; -#endif -#ifdef PERL_MAD - TOKEN* tkval; -#endif } -%token GRAMPROG GRAMFULLSTMT GRAMSTMTSEQ +%token GRAMPROG GRAMEXPR GRAMBLOCK GRAMBARESTMT GRAMFULLSTMT GRAMSTMTSEQ -%token '{' '}' '[' ']' '-' '+' '$' '@' '%' '*' '&' ';' +%token '{' '}' '[' ']' '-' '+' '@' '%' '&' '=' '.' %token WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF QWLIST -%token FUNC0SUB UNIOPSUB LSTOPSUB +%token FUNC0OP FUNC0SUB UNIOPSUB LSTOPSUB %token PLUGEXPR PLUGSTMT -%token LABEL -%token FORMAT SUB ANONSUB PACKAGE USE -%token WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR -%token GIVEN WHEN DEFAULT -%token LOOPEX DOTDOT YADAYADA -%token FUNC0 FUNC1 FUNC UNIOP LSTOP -%token RELOP EQOP MULOP ADDOP -%token DOLSHARP DO HASHBRACK NOAMP -%token LOCAL MY MYSUB REQUIRE -%token COLONATTR - -%type lpar_or_qw - -%type grammar prog progstart remember mremember +%token LABEL +%token FORMAT SUB ANONSUB PACKAGE USE +%token WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR +%token GIVEN WHEN DEFAULT +%token LOOPEX DOTDOT YADAYADA +%token FUNC0 FUNC1 FUNC UNIOP LSTOP +%token RELOP EQOP MULOP ADDOP +%token DOLSHARP DO HASHBRACK NOAMP +%token LOCAL MY REQUIRE +%token COLONATTR FORMLBRACK FORMRBRACK + +%type grammar remember mremember %type startsub startanonsub startformsub -/* FIXME for MAD - are these two ival? */ -%type mydefsv mintro -%type fullstmt decl format subrout mysubrout package use peg -%type block package_block mblock lineseq line loop cond else +%type mintro + +%type stmtseq fullstmt labfullstmt barestmt block mblock else %type expr term subscripted scalar ary hsh arylen star amper sideff -%type argexpr nexpr texpr iexpr mexpr mnexpr miexpr -%type listexpr listexprcom indirob listop method -%type formname subname proto subbody cont my_scalar +%type sliceme kvslice gelem +%type listexpr nexpr texpr iexpr mexpr mnexpr miexpr +%type optlistexpr optexpr optrepl indirob listop method +%type formname subname proto optsubbody cont my_scalar my_var +%type refgen_topic formblock %type subattrlist myattrlist myattrterm myterm -%type termbinop termunop anonymous termdo -%type switch case -%type label +%type subsignature termbinop termunop anonymous termdo +%type formstmtseq formline formarg -%nonassoc PREC_LOW +%nonassoc PREC_LOW %nonassoc LOOPEX -%left OROP DOROP -%left ANDOP -%right NOTOP +%left OROP DOROP +%left ANDOP +%right NOTOP %nonassoc LSTOP LSTOPSUB -%left ',' -%right ASSIGNOP -%right '?' ':' +%left ',' +%right ASSIGNOP +%right '?' ':' %nonassoc DOTDOT YADAYADA -%left OROR DORDOR -%left ANDAND -%left BITOROP -%left BITANDOP +%left OROR DORDOR +%left ANDAND +%left BITOROP +%left BITANDOP %nonassoc EQOP %nonassoc RELOP %nonassoc UNIOP UNIOPSUB %nonassoc REQUIRE -%left SHIFTOP +%left SHIFTOP %left ADDOP %left MULOP -%left MATCHOP -%right '!' '~' UMINUS REFGEN -%right POWOP -%nonassoc PREINC PREDEC POSTINC POSTDEC -%left ARROW -%nonassoc ')' -%left '(' +%left MATCHOP +%right '!' '~' UMINUS REFGEN +%right POWOP +%nonassoc PREINC PREDEC POSTINC POSTDEC POSTJOIN +%left ARROW +%nonassoc ')' +%left '(' %left '[' '{' -%token PEG - %% /* RULES */ /* Top-level choice of what kind of thing yyparse was called to parse */ -grammar : GRAMPROG prog - { $$ = $2; } - | GRAMFULLSTMT fullstmt +grammar : GRAMPROG + { + parser->expect = XSTATE; + } + remember stmtseq + { + newPROG(block_end($3,$4)); + PL_compiling.cop_seq = 0; + $$ = 0; + } + | GRAMEXPR + { + parser->expect = XTERM; + } + optexpr { - PL_eval_root = $2; + PL_eval_root = $3; + $$ = 0; + } + | GRAMBLOCK + { + parser->expect = XBLOCK; + } + block + { + PL_pad_reset_pending = TRUE; + PL_eval_root = $3; + $$ = 0; + yyunlex(); + parser->yychar = YYEOF; + } + | GRAMBARESTMT + { + parser->expect = XSTATE; + } + barestmt + { + PL_pad_reset_pending = TRUE; + PL_eval_root = $3; + $$ = 0; + yyunlex(); + parser->yychar = YYEOF; + } + | GRAMFULLSTMT + { + parser->expect = XSTATE; + } + fullstmt + { + PL_pad_reset_pending = TRUE; + PL_eval_root = $3; $$ = 0; yyunlex(); parser->yychar = YYEOF; @@ -154,65 +170,61 @@ grammar : GRAMPROG prog { parser->expect = XSTATE; } - lineseq + stmtseq { PL_eval_root = $3; $$ = 0; } ; -/* The whole program */ -prog : progstart - /*CONTINUED*/ lineseq - { $$ = $1; newPROG(block_end($1,$2)); } - ; - /* An ordinary block */ -block : '{' remember lineseq '}' - { if (PL_parser->copline > (line_t)IVAL($1)) - PL_parser->copline = (line_t)IVAL($1); +block : '{' remember stmtseq '}' + { if (parser->copline > (line_t)$1) + parser->copline = (line_t)$1; $$ = block_end($2, $3); - TOKEN_GETMAD($1,$$,'{'); - TOKEN_GETMAD($4,$$,'}'); } ; -remember: /* NULL */ /* start a full lexical scope */ - { $$ = block_start(TRUE); } - ; - -mydefsv: /* NULL */ /* lexicalize $_ */ - { $$ = (I32) Perl_allocmy(aTHX_ STR_WITH_LEN("$_"), 0); } +/* format body */ +formblock: '=' remember ';' FORMRBRACK formstmtseq ';' '.' + { if (parser->copline > (line_t)$1) + parser->copline = (line_t)$1; + $$ = block_end($2, $5); + } ; -progstart: - { - PL_parser->expect = XSTATE; $$ = block_start(TRUE); - } +remember: /* NULL */ /* start a full lexical scope */ + { $$ = block_start(TRUE); + parser->parsed_sub = 0; } ; - -mblock : '{' mremember lineseq '}' - { if (PL_parser->copline > (line_t)IVAL($1)) - PL_parser->copline = (line_t)IVAL($1); +mblock : '{' mremember stmtseq '}' + { if (parser->copline > (line_t)$1) + parser->copline = (line_t)$1; $$ = block_end($2, $3); - TOKEN_GETMAD($1,$$,'{'); - TOKEN_GETMAD($4,$$,'}'); } ; mremember: /* NULL */ /* start a partial lexical scope */ - { $$ = block_start(FALSE); } + { $$ = block_start(FALSE); + parser->parsed_sub = 0; } ; -/* A collection of "lines" in the program */ -lineseq : /* NULL */ +/* A sequence of statements in the program */ +stmtseq : /* NULL */ { $$ = (OP*)NULL; } - | lineseq decl - { - $$ = IF_MAD(op_append_list(OP_LINESEQ, $1, $2), $1); + | stmtseq fullstmt + { $$ = op_append_list(OP_LINESEQ, $1, $2); + PL_pad_reset_pending = TRUE; + if ($1 && $2) + PL_hints |= HINT_BLOCK_SCOPE; } - | lineseq line + ; + +/* A sequence of format lines */ +formstmtseq: /* NULL */ + { $$ = (OP*)NULL; } + | formstmtseq formline { $$ = op_append_list(OP_LINESEQ, $1, $2); PL_pad_reset_pending = TRUE; if ($1 && $2) @@ -220,65 +232,281 @@ lineseq : /* NULL */ } ; -/* A statement, or "line", in the program */ -fullstmt: decl +/* A statement in the program, including optional labels */ +fullstmt: barestmt + { + $$ = $1 ? newSTATEOP(0, NULL, $1) : NULL; + } + | labfullstmt { $$ = $1; } - | line + ; + +labfullstmt: LABEL barestmt { - PL_pad_reset_pending = TRUE; - $$ = $1; + $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2); + } + | LABEL labfullstmt + { + $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2); } ; -/* A non-declaration statement */ -line : label cond - { $$ = newSTATEOP(0, PVAL($1), $2); - TOKEN_GETMAD($1,((LISTOP*)$$)->op_first,'L'); } - | loop /* loops add their own labels */ - | switch /* ... and so do switches */ +/* A bare statement, lacking label and other aspects of state op */ +barestmt: PLUGSTMT { $$ = $1; } - | label case - { $$ = newSTATEOP(0, PVAL($1), $2); } - | label ';' + | FORMAT startformsub formname formblock { - if (PVAL($1)) { - $$ = newSTATEOP(0, PVAL($1), newOP(OP_NULL, 0)); - TOKEN_GETMAD($1,$$,'L'); - TOKEN_GETMAD($2,((LISTOP*)$$)->op_first,';'); + CV *fmtcv = PL_compcv; + newFORM($2, $3, $4); + $$ = (OP*)NULL; + if (CvOUTSIDE(fmtcv) && !CvEVAL(CvOUTSIDE(fmtcv))) { + pad_add_weakref(fmtcv); } - else { - $$ = IF_MAD( - newOP(OP_NULL, 0), - (OP*)NULL); - PL_parser->copline = NOLINE; - TOKEN_FREE($1); - TOKEN_GETMAD($2,$$,';'); + parser->parsed_sub = 1; + } + | SUB subname startsub + { + if ($2->op_type == OP_CONST) { + const char *const name = + SvPV_nolen_const(((SVOP*)$2)->op_sv); + if (strEQ(name, "BEGIN") || strEQ(name, "END") + || strEQ(name, "INIT") || strEQ(name, "CHECK") + || strEQ(name, "UNITCHECK")) + CvSPECIAL_on(PL_compcv); + } + else + /* State subs inside anonymous subs need to be + clonable themselves. */ + if (CvANON(CvOUTSIDE(PL_compcv)) + || CvCLONE(CvOUTSIDE(PL_compcv)) + || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST( + CvOUTSIDE(PL_compcv) + ))[$2->op_targ])) + CvCLONE_on(PL_compcv); + parser->in_my = 0; + parser->in_my_stash = NULL; + } + proto subattrlist optsubbody + { + SvREFCNT_inc_simple_void(PL_compcv); + $2->op_type == OP_CONST + ? newATTRSUB($3, $2, $5, $6, $7) + : newMYSUB($3, $2, $5, $6, $7) + ; + $$ = (OP*)NULL; + intro_my(); + parser->parsed_sub = 1; + } + | SUB subname startsub + { + 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); + parser->in_my = 0; + parser->in_my_stash = NULL; + } + remember subsignature subattrlist '{' stmtseq '}' + { + 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) + ; + $$ = (OP*)NULL; + intro_my(); + parser->parsed_sub = 1; + } + | PACKAGE WORD WORD ';' + { + package($3); + if ($2) + package_version($2); + $$ = (OP*)NULL; + } + | USE startsub + { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } + WORD WORD optlistexpr ';' + { + SvREFCNT_inc_simple_void(PL_compcv); + utilize($1, $2, $4, $5, $6); + parser->parsed_sub = 1; + $$ = (OP*)NULL; + } + | IF '(' remember mexpr ')' mblock else + { + $$ = block_end($3, + newCONDOP(0, $4, op_scope($6), $7)); + parser->copline = (line_t)$1; + } + | UNLESS '(' remember miexpr ')' mblock else + { + $$ = block_end($3, + newCONDOP(0, $4, op_scope($6), $7)); + parser->copline = (line_t)$1; + } + | GIVEN '(' remember mexpr ')' mblock + { + const PADOFFSET offset = pad_findmy_pvs("$_", 0); + $$ = block_end($3, + newGIVENOP($4, op_scope($6), + offset == NOT_IN_PAD + || PAD_COMPNAME_FLAGS_isOUR(offset) + ? 0 + : offset)); + parser->copline = (line_t)$1; + } + | 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 + { + $$ = block_end($3, + newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + $4, $7, $8, $6)); + parser->copline = (line_t)$1; + } + | UNTIL '(' remember iexpr ')' mintro mblock cont + { + $$ = block_end($3, + newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + $4, $7, $8, $6)); + parser->copline = (line_t)$1; + } + | FOR '(' remember mnexpr ';' + { parser->expect = XTERM; } + texpr ';' + { parser->expect = XTERM; } + mintro mnexpr ')' + mblock + { + OP *initop = $4; + OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + scalar($7), $13, $11, $10); + if (initop) { + forop = op_prepend_elem(OP_LINESEQ, initop, + op_append_elem(OP_LINESEQ, + newOP(OP_UNSTACK, OPf_SPECIAL), + forop)); + } + PL_hints |= HINT_BLOCK_SCOPE; + $$ = block_end($3, forop); + parser->copline = (line_t)$1; + } + | FOR MY remember my_scalar '(' mexpr ')' mblock cont + { + $$ = block_end($3, newFOROP(0, $4, $6, $8, $9)); + parser->copline = (line_t)$1; + } + | FOR scalar '(' remember mexpr ')' mblock cont + { + $$ = block_end($4, newFOROP(0, + op_lvalue($2, OP_ENTERLOOP), $5, $7, $8)); + parser->copline = (line_t)$1; + } + | FOR REFGEN MY remember my_var + { parser->in_my = 0; $$ = my($5); } + '(' mexpr ')' mblock cont + { + $$ = block_end( + $4, + newFOROP(0, + op_lvalue( + newUNOP(OP_REFGEN, 0, + $6), + OP_ENTERLOOP), + $8, $10, $11) + ); + parser->copline = (line_t)$1; + } + | FOR REFGEN refgen_topic '(' remember mexpr ')' mblock cont + { + $$ = block_end($5, newFOROP( + 0, op_lvalue(newUNOP(OP_REFGEN, 0, + $3), + OP_ENTERLOOP), $6, $8, $9)); + parser->copline = (line_t)$1; + } + | FOR '(' remember mexpr ')' mblock cont + { + $$ = block_end($3, + newFOROP(0, (OP*)NULL, $4, $6, $7)); + parser->copline = (line_t)$1; + } + | block cont + { + /* a block is a loop that happens once */ + $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + (OP*)NULL, $1, $2, 0); + } + | PACKAGE WORD WORD '{' remember + { + package($3); + if ($2) { + package_version($2); } - PL_parser->expect = XSTATE; } - | label sideff ';' + stmtseq '}' { - $$ = newSTATEOP(0, PVAL($1), $2); - PL_parser->expect = XSTATE; - DO_MAD({ - /* sideff might already have a nexstate */ - OP* op = ((LISTOP*)$$)->op_first; - if (op) { - while (op->op_sibling && - op->op_sibling->op_type == OP_NEXTSTATE) - op = op->op_sibling; - token_getmad($1,op,'L'); - token_getmad($3,op,';'); - } - }) - } - | package_block - { $$ = newSTATEOP(0, NULL, - newWHILEOP(0, 1, (LOOP*)(OP*)NULL, - NOLINE, (OP*)NULL, $1, - (OP*)NULL, 0)); } - | label PLUGSTMT - { $$ = newSTATEOP(0, PVAL($1), $2); } + /* a block is a loop that happens once */ + $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + (OP*)NULL, block_end($5, $7), (OP*)NULL, 0); + if (parser->copline > (line_t)$4) + parser->copline = (line_t)$4; + } + | sideff ';' + { + $$ = $1; + } + | ';' + { + $$ = (OP*)NULL; + parser->copline = NOLINE; + } + ; + +/* Format line */ +formline: THING formarg + { OP *list; + if ($2) { + OP *term = $2; + list = op_append_elem(OP_LIST, $1, term); + } + else { + list = $1; + } + if (parser->copline == NOLINE) + parser->copline = CopLINE(PL_curcop)-1; + else parser->copline--; + $$ = newSTATEOP(0, NULL, + op_convert_list(OP_FORMLINE, 0, list)); + } + ; + +formarg : /* NULL */ + { $$ = NULL; } + | FORMLBRACK stmtseq FORMRBRACK + { $$ = op_unscope($2); } ; /* An expression which may have a side-effect */ @@ -287,186 +515,42 @@ sideff : error | expr { $$ = $1; } | expr IF expr - { $$ = newLOGOP(OP_AND, 0, $3, $1); - TOKEN_GETMAD($2,$$,'i'); - } + { $$ = newLOGOP(OP_AND, 0, $3, $1); } | expr UNLESS expr - { $$ = newLOGOP(OP_OR, 0, $3, $1); - TOKEN_GETMAD($2,$$,'i'); - } + { $$ = newLOGOP(OP_OR, 0, $3, $1); } | expr WHILE expr - { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); - TOKEN_GETMAD($2,$$,'w'); - } + { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } | expr UNTIL iexpr - { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1); - TOKEN_GETMAD($2,$$,'w'); - } + { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1); } | expr FOR expr - { $$ = newFOROP(0, NULL, (line_t)IVAL($2), - (OP*)NULL, $3, $1, (OP*)NULL); - TOKEN_GETMAD($2,((LISTOP*)$$)->op_first->op_sibling,'w'); - } + { $$ = newFOROP(0, (OP*)NULL, $3, $1, (OP*)NULL); + parser->copline = (line_t)$2; } | expr WHEN expr - { $$ = newWHENOP($3, scope($1)); } + { $$ = newWHENOP($3, op_scope($1)); } ; /* else and elsif blocks */ else : /* NULL */ { $$ = (OP*)NULL; } | ELSE mblock - { ($2)->op_flags |= OPf_PARENS; $$ = scope($2); - TOKEN_GETMAD($1,$$,'o'); - } - | ELSIF lpar_or_qw mexpr ')' mblock else - { PL_parser->copline = (line_t)IVAL($1); - $$ = newCONDOP(0, newSTATEOP(OPf_SPECIAL,NULL,$3), scope($5), $6); - PL_hints |= HINT_BLOCK_SCOPE; - TOKEN_GETMAD($1,$$,'I'); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($4,$$,')'); + { + ($2)->op_flags |= OPf_PARENS; + $$ = op_scope($2); } - ; - -/* Real conditional expressions */ -cond : IF lpar_or_qw remember mexpr ')' mblock else - { PL_parser->copline = (line_t)IVAL($1); - $$ = block_end($3, - newCONDOP(0, $4, scope($6), $7)); - TOKEN_GETMAD($1,$$,'I'); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($5,$$,')'); - } - | UNLESS lpar_or_qw remember miexpr ')' mblock else - { PL_parser->copline = (line_t)IVAL($1); - $$ = block_end($3, - newCONDOP(0, $4, scope($6), $7)); - TOKEN_GETMAD($1,$$,'I'); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($5,$$,')'); + | ELSIF '(' mexpr ')' mblock else + { parser->copline = (line_t)$1; + $$ = newCONDOP(0, + newSTATEOP(OPf_SPECIAL,NULL,$3), + op_scope($5), $6); + PL_hints |= HINT_BLOCK_SCOPE; } ; -/* Cases for a switch statement */ -case : WHEN lpar_or_qw remember mexpr ')' mblock - { $$ = block_end($3, - newWHENOP($4, scope($6))); } - | DEFAULT block - { $$ = newWHENOP(0, scope($2)); } - ; - /* Continue blocks */ cont : /* NULL */ { $$ = (OP*)NULL; } | CONTINUE block - { $$ = scope($2); - TOKEN_GETMAD($1,$$,'o'); - } - ; - -/* Loops: while, until, for, and a bare block */ -loop : label WHILE lpar_or_qw remember texpr ')' mintro mblock cont - { OP *innerop; - PL_parser->copline = (line_t)IVAL($2); - $$ = block_end($4, - newSTATEOP(0, PVAL($1), - innerop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, - IVAL($2), $5, $8, $9, $7))); - TOKEN_GETMAD($1,innerop,'L'); - TOKEN_GETMAD($2,innerop,'W'); - TOKEN_GETMAD($3,innerop,'('); - TOKEN_GETMAD($6,innerop,')'); - } - - | label UNTIL lpar_or_qw remember iexpr ')' mintro mblock cont - { OP *innerop; - PL_parser->copline = (line_t)IVAL($2); - $$ = block_end($4, - newSTATEOP(0, PVAL($1), - innerop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, - IVAL($2), $5, $8, $9, $7))); - TOKEN_GETMAD($1,innerop,'L'); - TOKEN_GETMAD($2,innerop,'W'); - TOKEN_GETMAD($3,innerop,'('); - TOKEN_GETMAD($6,innerop,')'); - } - | label FOR MY remember my_scalar lpar_or_qw mexpr ')' mblock cont - { OP *innerop; - $$ = block_end($4, - innerop = newFOROP(0, PVAL($1), (line_t)IVAL($2), - $5, $7, $9, $10)); - TOKEN_GETMAD($1,((LISTOP*)innerop)->op_first,'L'); - TOKEN_GETMAD($2,((LISTOP*)innerop)->op_first->op_sibling,'W'); - TOKEN_GETMAD($3,((LISTOP*)innerop)->op_first->op_sibling,'d'); - TOKEN_GETMAD($6,((LISTOP*)innerop)->op_first->op_sibling,'('); - TOKEN_GETMAD($8,((LISTOP*)innerop)->op_first->op_sibling,')'); - } - | label FOR scalar lpar_or_qw remember mexpr ')' mblock cont - { OP *innerop; - $$ = block_end($5, - innerop = newFOROP(0, PVAL($1), (line_t)IVAL($2), - mod($3, OP_ENTERLOOP), $6, $8, $9)); - TOKEN_GETMAD($1,((LISTOP*)innerop)->op_first,'L'); - TOKEN_GETMAD($2,((LISTOP*)innerop)->op_first->op_sibling,'W'); - TOKEN_GETMAD($4,((LISTOP*)innerop)->op_first->op_sibling,'('); - TOKEN_GETMAD($7,((LISTOP*)innerop)->op_first->op_sibling,')'); - } - | label FOR lpar_or_qw remember mexpr ')' mblock cont - { OP *innerop; - $$ = block_end($4, - innerop = newFOROP(0, PVAL($1), (line_t)IVAL($2), - (OP*)NULL, $5, $7, $8)); - TOKEN_GETMAD($1,((LISTOP*)innerop)->op_first,'L'); - TOKEN_GETMAD($2,((LISTOP*)innerop)->op_first->op_sibling,'W'); - TOKEN_GETMAD($3,((LISTOP*)innerop)->op_first->op_sibling,'('); - TOKEN_GETMAD($6,((LISTOP*)innerop)->op_first->op_sibling,')'); - } - | label FOR lpar_or_qw remember mnexpr ';' texpr ';' mintro mnexpr ')' - mblock - /* basically fake up an initialize-while lineseq */ - { OP *forop; - PL_parser->copline = (line_t)IVAL($2); - forop = newSTATEOP(0, PVAL($1), - newWHILEOP(0, 1, (LOOP*)(OP*)NULL, - IVAL($2), scalar($7), - $12, $10, $9)); -#ifdef MAD - forop = newUNOP(OP_NULL, 0, op_append_elem(OP_LINESEQ, - newSTATEOP(0, - CopLABEL_alloc(($1)->tk_lval.pval), - ($5 ? $5 : newOP(OP_NULL, 0)) ), - forop)); - - token_getmad($2,forop,'3'); - token_getmad($3,forop,'('); - token_getmad($6,forop,'1'); - token_getmad($8,forop,'2'); - token_getmad($11,forop,')'); - token_getmad($1,forop,'L'); -#else - if ($5) { - forop = op_append_elem(OP_LINESEQ, - newSTATEOP(0, CopLABEL_alloc($1), $5), - forop); - } - - -#endif - $$ = block_end($4, forop); } - | label block cont /* a block is a loop that happens once */ - { $$ = newSTATEOP(0, PVAL($1), - newWHILEOP(0, 1, (LOOP*)(OP*)NULL, - NOLINE, (OP*)NULL, $2, $3, 0)); - TOKEN_GETMAD($1,((LISTOP*)$$)->op_first,'L'); } - ; - -/* Switch blocks */ -switch : label GIVEN lpar_or_qw remember mydefsv mexpr ')' mblock - { PL_parser->copline = (line_t) IVAL($2); - $$ = block_end($4, - newSTATEOP(0, PVAL($1), - newGIVENOP($6, scope($8), - (PADOFFSET) $5) )); } + { $$ = op_scope($2); } ; /* determine whether there are any new my declarations */ @@ -507,104 +591,10 @@ miexpr : iexpr { $$ = $1; intro_my(); } ; -/* Optional "MAIN:"-style loop labels */ -label : /* empty */ - { -#ifdef MAD - YYSTYPE tmplval; - tmplval.pval = NULL; - $$ = newTOKEN(OP_NULL, tmplval, 0); -#else - $$ = NULL; -#endif - } - | LABEL - ; - -/* Some kind of declaration - just hang on peg in the parse tree */ -decl : format - { $$ = $1; } - | subrout - { $$ = $1; } - | mysubrout - { $$ = $1; } - | package - { $$ = $1; } - | use - { $$ = $1; } - - /* these two are only used by MAD */ - - | peg - { $$ = $1; } - ; - -peg : PEG - { $$ = newOP(OP_NULL,0); - TOKEN_GETMAD($1,$$,'p'); - } - ; - -format : FORMAT startformsub formname block - { - CV *fmtcv = PL_compcv; - SvREFCNT_inc_simple_void(PL_compcv); -#ifdef MAD - $$ = newFORM($2, $3, $4); - prepend_madprops($1->tk_mad, $$, 'F'); - $1->tk_mad = 0; - token_free($1); -#else - newFORM($2, $3, $4); - $$ = (OP*)NULL; -#endif - if (CvOUTSIDE(fmtcv) && !CvUNIQUE(CvOUTSIDE(fmtcv))) { - SvREFCNT_inc_simple_void(fmtcv); - pad_add_anon((SV*)fmtcv, OP_NULL); - } - } - ; - formname: WORD { $$ = $1; } | /* NULL */ { $$ = (OP*)NULL; } ; -/* Unimplemented "my sub foo { }" */ -mysubrout: MYSUB startsub subname proto subattrlist subbody - { SvREFCNT_inc_simple_void(PL_compcv); -#ifdef MAD - $$ = newMYSUB($2, $3, $4, $5, $6); - token_getmad($1,$$,'d'); -#else - newMYSUB($2, $3, $4, $5, $6); - $$ = (OP*)NULL; -#endif - } - ; - -/* Subroutine definition */ -subrout : SUB startsub subname proto subattrlist subbody - { SvREFCNT_inc_simple_void(PL_compcv); -#ifdef MAD - { - OP* o = newSVOP(OP_ANONCODE, 0, - (SV*)newATTRSUB($2, $3, $4, $5, $6)); - $$ = newOP(OP_NULL,0); - op_getmad(o,$$,'&'); - op_getmad($3,$$,'n'); - op_getmad($4,$$,'s'); - op_getmad($5,$$,'a'); - token_getmad($1,$$,'d'); - append_madprops($6->op_madprop, $$, 0); - $6->op_madprop = 0; - } -#else - newATTRSUB($2, $3, $4, $5, $6); - $$ = (OP*)NULL; -#endif - } - ; - startsub: /* NULL */ /* start a regular subroutine scope */ { $$ = start_subparse(FALSE, 0); SAVEFREESV(PL_compcv); } @@ -622,12 +612,8 @@ startformsub: /* NULL */ /* start a format subroutine scope */ ; /* Name of a subroutine - must be a bareword, could be special */ -subname : WORD { const char *const name = SvPV_nolen_const(((SVOP*)$1)->op_sv); - if (strEQ(name, "BEGIN") || strEQ(name, "END") - || strEQ(name, "INIT") || strEQ(name, "CHECK") - || strEQ(name, "UNITCHECK")) - CvSPECIAL_on(PL_compcv); - $$ = $1; } +subname : WORD + | PRIVATEREF ; /* Subroutine prototype */ @@ -640,198 +626,103 @@ proto : /* NULL */ subattrlist: /* NULL */ { $$ = (OP*)NULL; } | COLONATTR THING - { $$ = $2; - TOKEN_GETMAD($1,$$,':'); - } + { $$ = $2; } | COLONATTR - { $$ = IF_MAD( - newOP(OP_NULL, 0), - (OP*)NULL - ); - TOKEN_GETMAD($1,$$,':'); - } + { $$ = (OP*)NULL; } ; /* List of attributes for a "my" variable declaration */ myattrlist: COLONATTR THING - { $$ = $2; - TOKEN_GETMAD($1,$$,':'); - } + { $$ = $2; } | COLONATTR - { $$ = IF_MAD( - newOP(OP_NULL, 0), - (OP*)NULL - ); - TOKEN_GETMAD($1,$$,':'); - } - ; - -/* Subroutine body - either null or a block */ -subbody : block { $$ = $1; } - | ';' { $$ = IF_MAD( - newOP(OP_NULL,0), - (OP*)NULL - ); - PL_parser->expect = XSTATE; - TOKEN_GETMAD($1,$$,';'); - } + { $$ = (OP*)NULL; } ; -package : PACKAGE WORD WORD ';' +/* Subroutine signature */ +subsignature: '(' { -#ifdef MAD - $$ = package($3); - token_getmad($1,$$,'o'); - if ($2) - package_version($2); - token_getmad($4,$$,';'); -#else - package($3); - if ($2) - package_version($2); - $$ = (OP*)NULL; -#endif - } - ; + /* We shouldn't get here otherwise */ + assert(FEATURE_SIGNATURES_IS_ENABLED); -package_block: PACKAGE WORD WORD '{' remember - { - int save_3_latefree = $3->op_latefree; - $3->op_latefree = 1; - package($3); - $3->op_latefree = save_3_latefree; - if ($2) { - int save_2_latefree = $2->op_latefree; - $2->op_latefree = 1; - package_version($2); - $2->op_latefree = save_2_latefree; - } + Perl_ck_warner_d(aTHX_ + packWARN(WARN_EXPERIMENTAL__SIGNATURES), + "The signatures feature is experimental"); + $$ = parse_subsignature(); } - lineseq '}' - { if (PL_parser->copline > (line_t)IVAL($4)) - PL_parser->copline = (line_t)IVAL($4); - $$ = block_end($5, $7); - TOKEN_GETMAD($4,$$,'{'); - TOKEN_GETMAD($8,$$,'}'); - op_free($3); - if ($2) - op_free($2); + ')' + { + $$ = op_append_list(OP_LINESEQ, $2, + newSTATEOP(0, NULL, sawparens(newNULLLIST()))); + parser->expect = XATTRBLOCK; } ; -use : USE startsub - { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } - WORD WORD listexpr ';' - { SvREFCNT_inc_simple_void(PL_compcv); -#ifdef MAD - $$ = utilize(IVAL($1), $2, $4, $5, $6); - token_getmad($1,$$,'o'); - token_getmad($7,$$,';'); - if (PL_parser->rsfp_filters && - AvFILLp(PL_parser->rsfp_filters) >= 0) - append_madprops(newMADPROP('!', MAD_NULL, NULL, 0), $$, 0); -#else - utilize(IVAL($1), $2, $4, $5, $6); - $$ = (OP*)NULL; -#endif - } +/* Optional subroutine body, for named subroutine declaration */ +optsubbody: block + | ';' { $$ = (OP*)NULL; } ; /* Ordinary expressions; logical combinations */ expr : expr ANDOP expr - { $$ = newLOGOP(OP_AND, 0, $1, $3); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newLOGOP(OP_AND, 0, $1, $3); } | expr OROP expr - { $$ = newLOGOP(IVAL($2), 0, $1, $3); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newLOGOP($2, 0, $1, $3); } | expr DOROP expr - { $$ = newLOGOP(OP_DOR, 0, $1, $3); - TOKEN_GETMAD($2,$$,'o'); - } - | argexpr %prec PREC_LOW + { $$ = newLOGOP(OP_DOR, 0, $1, $3); } + | listexpr %prec PREC_LOW ; /* Expressions are a list of terms joined by commas */ -argexpr : argexpr ',' +listexpr: listexpr ',' + { $$ = $1; } + | listexpr ',' term { -#ifdef MAD - OP* op = newNULLLIST(); - token_getmad($2,op,','); - $$ = op_append_elem(OP_LIST, $1, op); -#else - $$ = $1; -#endif - } - | argexpr ',' term - { OP* term = $3; - DO_MAD( - term = newUNOP(OP_NULL, 0, term); - token_getmad($2,term,','); - ) $$ = op_append_elem(OP_LIST, $1, term); } | term %prec PREC_LOW ; /* List operators */ -listop : LSTOP indirob argexpr /* map {...} @args or print $fh @args */ - { $$ = convert(IVAL($1), OPf_STACKED, - op_prepend_elem(OP_LIST, newGVREF(IVAL($1),$2), $3) ); - TOKEN_GETMAD($1,$$,'o'); +listop : LSTOP indirob listexpr /* map {...} @args or print $fh @args */ + { $$ = op_convert_list($1, OPf_STACKED, + op_prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); } | FUNC '(' indirob expr ')' /* print ($fh @args */ - { $$ = convert(IVAL($1), OPf_STACKED, - op_prepend_elem(OP_LIST, newGVREF(IVAL($1),$3), $4) ); - TOKEN_GETMAD($1,$$,'o'); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($5,$$,')'); - } - | term ARROW method lpar_or_qw listexprcom ')' /* $foo->bar(list) */ - { $$ = convert(OP_ENTERSUB, OPf_STACKED, + { $$ = op_convert_list($1, OPf_STACKED, + op_prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); + } + | term ARROW method '(' optexpr ')' /* $foo->bar(list) */ + { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, op_prepend_elem(OP_LIST, scalar($1), $5), - newUNOP(OP_METHOD, 0, $3))); - TOKEN_GETMAD($2,$$,'A'); - TOKEN_GETMAD($4,$$,'('); - TOKEN_GETMAD($6,$$,')'); + newMETHOP(OP_METHOD, 0, $3))); } | term ARROW method /* $foo->bar */ - { $$ = convert(OP_ENTERSUB, OPf_STACKED, + { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, scalar($1), - newUNOP(OP_METHOD, 0, $3))); - TOKEN_GETMAD($2,$$,'A'); + newMETHOP(OP_METHOD, 0, $3))); } - | METHOD indirob listexpr /* new Class @args */ - { $$ = convert(OP_ENTERSUB, OPf_STACKED, + | METHOD indirob optlistexpr /* new Class @args */ + { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, op_prepend_elem(OP_LIST, $2, $3), - newUNOP(OP_METHOD, 0, $1))); + newMETHOP(OP_METHOD, 0, $1))); } - | FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */ - { $$ = convert(OP_ENTERSUB, OPf_STACKED, + | FUNCMETH indirob '(' optexpr ')' /* method $object (@args) */ + { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, op_prepend_elem(OP_LIST, $2, $4), - newUNOP(OP_METHOD, 0, $1))); - TOKEN_GETMAD($3,$$,'('); - TOKEN_GETMAD($5,$$,')'); - } - | LSTOP listexpr /* print @args */ - { $$ = convert(IVAL($1), 0, $2); - TOKEN_GETMAD($1,$$,'o'); - } - | FUNC '(' listexprcom ')' /* print (@args) */ - { $$ = convert(IVAL($1), 0, $3); - TOKEN_GETMAD($1,$$,'o'); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($4,$$,')'); + newMETHOP(OP_METHOD, 0, $1))); } + | LSTOP optlistexpr /* print @args */ + { $$ = op_convert_list($1, 0, $2); } + | FUNC '(' optexpr ')' /* print (@args) */ + { $$ = op_convert_list($1, 0, $3); } | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */ { SvREFCNT_inc_simple_void(PL_compcv); $$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); } - listexpr %prec LSTOP /* ... @bar */ + optlistexpr %prec LSTOP /* ... @bar */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, op_prepend_elem(OP_LIST, $4, $5), $1)); @@ -844,311 +735,157 @@ method : METHOD ; /* Some kind of subscripted expression */ -subscripted: star '{' expr ';' '}' /* *main::{something} */ +subscripted: gelem '{' expr ';' '}' /* *main::{something} */ /* In this and all the hash accessors, ';' is * provided by the tokeniser */ - { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); - PL_parser->expect = XOPERATOR; - TOKEN_GETMAD($2,$$,'{'); - TOKEN_GETMAD($4,$$,';'); - TOKEN_GETMAD($5,$$,'}'); - } + { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); } | scalar '[' expr ']' /* $array[$element] */ { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); - TOKEN_GETMAD($2,$$,'['); - TOKEN_GETMAD($4,$$,']'); } | term ARROW '[' expr ']' /* somearef->[$element] */ { $$ = newBINOP(OP_AELEM, 0, ref(newAVREF($1),OP_RV2AV), scalar($4)); - TOKEN_GETMAD($2,$$,'a'); - TOKEN_GETMAD($3,$$,'['); - TOKEN_GETMAD($5,$$,']'); } | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ { $$ = newBINOP(OP_AELEM, 0, ref(newAVREF($1),OP_RV2AV), scalar($3)); - TOKEN_GETMAD($2,$$,'['); - TOKEN_GETMAD($4,$$,']'); } - | scalar '{' expr ';' '}' /* $foo->{bar();} */ + | scalar '{' expr ';' '}' /* $foo{bar();} */ { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); - PL_parser->expect = XOPERATOR; - TOKEN_GETMAD($2,$$,'{'); - TOKEN_GETMAD($4,$$,';'); - TOKEN_GETMAD($5,$$,'}'); } | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ { $$ = newBINOP(OP_HELEM, 0, ref(newHVREF($1),OP_RV2HV), - jmaybe($4)); - PL_parser->expect = XOPERATOR; - TOKEN_GETMAD($2,$$,'a'); - TOKEN_GETMAD($3,$$,'{'); - TOKEN_GETMAD($5,$$,';'); - TOKEN_GETMAD($6,$$,'}'); - } + jmaybe($4)); } | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ { $$ = newBINOP(OP_HELEM, 0, ref(newHVREF($1),OP_RV2HV), - jmaybe($3)); - PL_parser->expect = XOPERATOR; - TOKEN_GETMAD($2,$$,'{'); - TOKEN_GETMAD($4,$$,';'); - TOKEN_GETMAD($5,$$,'}'); - } + jmaybe($3)); } | term ARROW '(' ')' /* $subref->() */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - newCVREF(0, scalar($1))); - TOKEN_GETMAD($2,$$,'a'); - TOKEN_GETMAD($3,$$,'('); - TOKEN_GETMAD($4,$$,')'); - } + newCVREF(0, scalar($1))); } | term ARROW '(' expr ')' /* $subref->(@args) */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, $4, - newCVREF(0, scalar($1)))); - TOKEN_GETMAD($2,$$,'a'); - TOKEN_GETMAD($3,$$,'('); - TOKEN_GETMAD($5,$$,')'); - } + newCVREF(0, scalar($1)))); } - | subscripted lpar_or_qw expr ')' /* $foo->{bar}->(@args) */ + | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, $3, - newCVREF(0, scalar($1)))); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($4,$$,')'); - } - | subscripted lpar_or_qw ')' /* $foo->{bar}->() */ + newCVREF(0, scalar($1)))); } + | subscripted '(' ')' /* $foo->{bar}->() */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - newCVREF(0, scalar($1))); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($3,$$,')'); - } + newCVREF(0, scalar($1))); } | '(' expr ')' '[' expr ']' /* list slice */ - { $$ = newSLICEOP(0, $5, $2); - TOKEN_GETMAD($1,$$,'('); - TOKEN_GETMAD($3,$$,')'); - TOKEN_GETMAD($4,$$,'['); - TOKEN_GETMAD($6,$$,']'); - } + { $$ = newSLICEOP(0, $5, $2); } | QWLIST '[' expr ']' /* list literal slice */ - { $$ = newSLICEOP(0, $3, $1); - TOKEN_GETMAD($2,$$,'['); - TOKEN_GETMAD($4,$$,']'); - } + { $$ = newSLICEOP(0, $3, $1); } | '(' ')' '[' expr ']' /* empty list slice! */ - { $$ = newSLICEOP(0, $4, (OP*)NULL); - TOKEN_GETMAD($1,$$,'('); - TOKEN_GETMAD($2,$$,')'); - TOKEN_GETMAD($3,$$,'['); - TOKEN_GETMAD($5,$$,']'); - } + { $$ = newSLICEOP(0, $4, (OP*)NULL); } ; /* Binary operators between terms */ termbinop: term ASSIGNOP term /* $x = $y */ - { $$ = newASSIGNOP(OPf_STACKED, $1, IVAL($2), $3); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } | term POWOP term /* $x ** $y */ - { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3)); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } | term MULOP term /* $x * $y, $x x $y */ - { if (IVAL($2) != OP_REPEAT) + { if ($2 != OP_REPEAT) scalar($1); - $$ = newBINOP(IVAL($2), 0, $1, scalar($3)); - TOKEN_GETMAD($2,$$,'o'); + $$ = newBINOP($2, 0, $1, scalar($3)); } | term ADDOP term /* $x + $y */ - { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3)); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } | term SHIFTOP term /* $x >> $y, $x << $y */ - { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3)); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } | term RELOP term /* $x > $y, etc. */ - { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3)); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } | term EQOP term /* $x == $y, $x eq $y */ - { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3)); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } | term BITANDOP term /* $x & $y */ - { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3)); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } | term BITOROP term /* $x | $y */ - { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3)); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } | term DOTDOT term /* $x..$y, $x...$y */ - { - $$ = newRANGE(IVAL($2), scalar($1), scalar($3)); - DO_MAD({ - UNOP *op; - op = (UNOP*)$$; - op = (UNOP*)op->op_first; /* get to flop */ - op = (UNOP*)op->op_first; /* get to flip */ - op = (UNOP*)op->op_first; /* get to range */ - token_getmad($2,(OP*)op,'o'); - }) - } + { $$ = newRANGE($2, scalar($1), scalar($3)); } | term ANDAND term /* $x && $y */ - { $$ = newLOGOP(OP_AND, 0, $1, $3); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newLOGOP(OP_AND, 0, $1, $3); } | term OROR term /* $x || $y */ - { $$ = newLOGOP(OP_OR, 0, $1, $3); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newLOGOP(OP_OR, 0, $1, $3); } | term DORDOR term /* $x // $y */ - { $$ = newLOGOP(OP_DOR, 0, $1, $3); - TOKEN_GETMAD($2,$$,'o'); - } + { $$ = newLOGOP(OP_DOR, 0, $1, $3); } | term MATCHOP term /* $x =~ /$y/ */ - { $$ = bind_match(IVAL($2), $1, $3); - TOKEN_GETMAD($2, - ($$->op_type == OP_NOT - ? ((UNOP*)$$)->op_first : $$), - '~'); - } + { $$ = bind_match($2, $1, $3); } ; /* Unary operators and terms */ termunop : '-' term %prec UMINUS /* -$x */ - { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } | '+' term %prec UMINUS /* +$x */ - { $$ = IF_MAD( - newUNOP(OP_NULL, 0, $2), - $2 - ); - TOKEN_GETMAD($1,$$,'+'); - } + { $$ = $2; } + | '!' term /* !$x */ - { $$ = newUNOP(OP_NOT, 0, scalar($2)); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newUNOP(OP_NOT, 0, scalar($2)); } | '~' term /* ~$x */ - { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2)); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newUNOP($1, 0, scalar($2)); } | term POSTINC /* $x++ */ { $$ = newUNOP(OP_POSTINC, 0, - mod(scalar($1), OP_POSTINC)); - TOKEN_GETMAD($2,$$,'o'); - } + op_lvalue(scalar($1), OP_POSTINC)); } | term POSTDEC /* $x-- */ { $$ = newUNOP(OP_POSTDEC, 0, - mod(scalar($1), OP_POSTDEC)); - TOKEN_GETMAD($2,$$,'o'); + op_lvalue(scalar($1), OP_POSTDEC));} + | term POSTJOIN /* implicit join after interpolated ->@ */ + { $$ = op_convert_list(OP_JOIN, 0, + op_append_elem( + OP_LIST, + newSVREF(scalar( + newSVOP(OP_CONST,0, + newSVpvs("\"")) + )), + $1 + )); } | PREINC term /* ++$x */ { $$ = newUNOP(OP_PREINC, 0, - mod(scalar($2), OP_PREINC)); - TOKEN_GETMAD($1,$$,'o'); - } + op_lvalue(scalar($2), OP_PREINC)); } | PREDEC term /* --$x */ { $$ = newUNOP(OP_PREDEC, 0, - mod(scalar($2), OP_PREDEC)); - TOKEN_GETMAD($1,$$,'o'); - } + op_lvalue(scalar($2), OP_PREDEC)); } ; /* Constructors for anonymous data */ anonymous: '[' expr ']' - { $$ = newANONLIST($2); - TOKEN_GETMAD($1,$$,'['); - TOKEN_GETMAD($3,$$,']'); - } + { $$ = newANONLIST($2); } | '[' ']' - { $$ = newANONLIST((OP*)NULL); - TOKEN_GETMAD($1,$$,'['); - TOKEN_GETMAD($2,$$,']'); - } + { $$ = newANONLIST((OP*)NULL);} | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ - { $$ = newANONHASH($2); - TOKEN_GETMAD($1,$$,'{'); - TOKEN_GETMAD($3,$$,';'); - TOKEN_GETMAD($4,$$,'}'); - } + { $$ = newANONHASH($2); } | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ - { $$ = newANONHASH((OP*)NULL); - TOKEN_GETMAD($1,$$,'{'); - TOKEN_GETMAD($2,$$,';'); - TOKEN_GETMAD($3,$$,'}'); - } - | ANONSUB startanonsub proto subattrlist block %prec '(' + { $$ = newANONHASH((OP*)NULL); } + | ANONSUB startanonsub proto subattrlist block %prec '(' { SvREFCNT_inc_simple_void(PL_compcv); - $$ = newANONATTRSUB($2, $3, $4, $5); - TOKEN_GETMAD($1,$$,'o'); - OP_GETMAD($3,$$,'s'); - OP_GETMAD($4,$$,'a'); + $$ = newANONATTRSUB($2, $3, $4, $5); } + | ANONSUB startanonsub remember subsignature subattrlist '{' stmtseq '}' %prec '(' + { + OP *body; + if (parser->copline > (line_t)$6) + parser->copline = (line_t)$6; + body = block_end($3, + op_append_list(OP_LINESEQ, $4, $7)); + SvREFCNT_inc_simple_void(PL_compcv); + $$ = newANONATTRSUB($2, NULL, $5, body); } ; /* Things called with "do" */ termdo : DO term %prec UNIOP /* do $filename */ - { $$ = dofile($2, IVAL($1)); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = dofile($2, $1);} | DO block %prec '(' /* do { code */ - { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); - TOKEN_GETMAD($1,$$,'D'); - } - | DO WORD lpar_or_qw ')' /* do somesub() */ - { $$ = newUNOP(OP_ENTERSUB, - OPf_SPECIAL|OPf_STACKED, - op_prepend_elem(OP_LIST, - scalar(newCVREF( - (OPpENTERSUB_AMPER<<8), - scalar($2) - )),(OP*)NULL)); dep(); - TOKEN_GETMAD($1,$$,'o'); - TOKEN_GETMAD($3,$$,'('); - TOKEN_GETMAD($4,$$,')'); - } - | DO WORD lpar_or_qw expr ')' /* do somesub(@args) */ - { $$ = newUNOP(OP_ENTERSUB, - OPf_SPECIAL|OPf_STACKED, - op_append_elem(OP_LIST, - $4, - scalar(newCVREF( - (OPpENTERSUB_AMPER<<8), - scalar($2) - )))); dep(); - TOKEN_GETMAD($1,$$,'o'); - TOKEN_GETMAD($3,$$,'('); - TOKEN_GETMAD($5,$$,')'); - } - | DO scalar lpar_or_qw ')' /* do $subref () */ - { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, - op_prepend_elem(OP_LIST, - scalar(newCVREF(0,scalar($2))), (OP*)NULL)); dep(); - TOKEN_GETMAD($1,$$,'o'); - TOKEN_GETMAD($3,$$,'('); - TOKEN_GETMAD($4,$$,')'); - } - | DO scalar lpar_or_qw expr ')' /* do $subref (@args) */ - { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, - op_prepend_elem(OP_LIST, - $4, - scalar(newCVREF(0,scalar($2))))); dep(); - TOKEN_GETMAD($1,$$,'o'); - TOKEN_GETMAD($3,$$,'('); - TOKEN_GETMAD($5,$$,')'); - } - + { $$ = newUNOP(OP_NULL, OPf_SPECIAL, op_scope($2));} ; term : termbinop @@ -1156,32 +893,19 @@ term : termbinop | anonymous | termdo | term '?' term ':' term - { $$ = newCONDOP(0, $1, $3, $5); - TOKEN_GETMAD($2,$$,'?'); - TOKEN_GETMAD($4,$$,':'); - } + { $$ = newCONDOP(0, $1, $3, $5); } | REFGEN term /* \$x, \@y, \%z */ - { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newUNOP(OP_REFGEN, 0, $2); } | myattrterm %prec UNIOP { $$ = $1; } | LOCAL term %prec UNIOP - { $$ = localize($2,IVAL($1)); - TOKEN_GETMAD($1,$$,'k'); - } + { $$ = localize($2,$1); } | '(' expr ')' - { $$ = sawparens(IF_MAD(newUNOP(OP_NULL,0,$2), $2)); - TOKEN_GETMAD($1,$$,'('); - TOKEN_GETMAD($3,$$,')'); - } + { $$ = sawparens($2); } | QWLIST - { $$ = IF_MAD(newUNOP(OP_NULL,0,$1), $1); } + { $$ = $1; } | '(' ')' - { $$ = sawparens(newNULLLIST()); - TOKEN_GETMAD($1,$$,'('); - TOKEN_GETMAD($2,$$,')'); - } + { $$ = sawparens(newNULLLIST()); } | scalar %prec '(' { $$ = $1; } | star %prec '(' @@ -1194,161 +918,147 @@ term : termbinop { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} | subscripted { $$ = $1; } - | ary '[' expr ']' /* array slice */ + | sliceme '[' expr ']' /* array slice */ { $$ = op_prepend_elem(OP_ASLICE, newOP(OP_PUSHMARK, 0), newLISTOP(OP_ASLICE, 0, list($3), ref($1, OP_ASLICE))); - TOKEN_GETMAD($2,$$,'['); - TOKEN_GETMAD($4,$$,']'); + if ($$ && $1) + $$->op_private |= + $1->op_private & OPpSLICEWARNING; + } + | kvslice '[' expr ']' /* array key/value slice */ + { $$ = op_prepend_elem(OP_KVASLICE, + newOP(OP_PUSHMARK, 0), + newLISTOP(OP_KVASLICE, 0, + list($3), + ref(oopsAV($1), OP_KVASLICE))); + if ($$ && $1) + $$->op_private |= + $1->op_private & OPpSLICEWARNING; } - | ary '{' expr ';' '}' /* @hash{@keys} */ + | sliceme '{' expr ';' '}' /* @hash{@keys} */ { $$ = op_prepend_elem(OP_HSLICE, newOP(OP_PUSHMARK, 0), newLISTOP(OP_HSLICE, 0, list($3), ref(oopsHV($1), OP_HSLICE))); - PL_parser->expect = XOPERATOR; - TOKEN_GETMAD($2,$$,'{'); - TOKEN_GETMAD($4,$$,';'); - TOKEN_GETMAD($5,$$,'}'); + if ($$ && $1) + $$->op_private |= + $1->op_private & OPpSLICEWARNING; + } + | kvslice '{' expr ';' '}' /* %hash{@keys} */ + { $$ = op_prepend_elem(OP_KVHSLICE, + newOP(OP_PUSHMARK, 0), + newLISTOP(OP_KVHSLICE, 0, + list($3), + ref($1, OP_KVHSLICE))); + if ($$ && $1) + $$->op_private |= + $1->op_private & OPpSLICEWARNING; } | THING %prec '(' { $$ = $1; } | amper /* &foo; */ { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } - | amper lpar_or_qw ')' /* &foo() */ + | amper '(' ')' /* &foo() or foo() */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($3,$$,')'); } - | amper lpar_or_qw expr ')' /* &foo(@args) */ + | amper '(' expr ')' /* &foo(@args) or foo(@args) */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, $3, scalar($1))); - DO_MAD({ - OP* op = $$; - if (op->op_type == OP_CONST) { /* defeat const fold */ - op = (OP*)op->op_madprop->mad_val; - } - token_getmad($2,op,'('); - token_getmad($4,op,')'); - }) - } - | NOAMP WORD listexpr /* foo(@args) */ + } + | NOAMP subname optlistexpr /* foo @args (no parens) */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, $3, scalar($2))); - TOKEN_GETMAD($1,$$,'o'); } + | term ARROW '$' '*' + { $$ = newSVREF($1); } + | term ARROW '@' '*' + { $$ = newAVREF($1); } + | term ARROW '%' '*' + { $$ = newHVREF($1); } + | term ARROW '&' '*' + { $$ = newUNOP(OP_ENTERSUB, 0, + scalar(newCVREF($3,$1))); } + | term ARROW '*' '*' %prec '(' + { $$ = newGVREF(0,$1); } | LOOPEX /* loop exiting command (goto, last, dump, etc) */ - { $$ = newOP(IVAL($1), OPf_SPECIAL); - PL_hints |= HINT_BLOCK_SCOPE; - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newOP($1, OPf_SPECIAL); + PL_hints |= HINT_BLOCK_SCOPE; } | LOOPEX term - { $$ = newLOOPEX(IVAL($1),$2); - TOKEN_GETMAD($1,$$,'o'); - } - | NOTOP argexpr /* not $foo */ - { $$ = newUNOP(OP_NOT, 0, scalar($2)); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newLOOPEX($1,$2); } + | NOTOP listexpr /* not $foo */ + { $$ = newUNOP(OP_NOT, 0, scalar($2)); } | UNIOP /* Unary op, $_ implied */ - { $$ = newOP(IVAL($1), 0); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newOP($1, 0); } | UNIOP block /* eval { foo }* */ - { $$ = newUNOP(IVAL($1), 0, $2); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newUNOP($1, 0, $2); } | UNIOP term /* Unary op */ - { $$ = newUNOP(IVAL($1), 0, $2); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newUNOP($1, 0, $2); } | REQUIRE /* require, $_ implied */ - { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); } | REQUIRE term /* require Foo */ - { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); } | UNIOPSUB { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } | UNIOPSUB term /* Sub treated as unop */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, $2, scalar($1))); } | FUNC0 /* Nullary operator */ - { $$ = newOP(IVAL($1), 0); - TOKEN_GETMAD($1,$$,'o'); - } + { $$ = newOP($1, 0); } | FUNC0 '(' ')' - { $$ = newOP(IVAL($1), 0); - TOKEN_GETMAD($1,$$,'o'); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($3,$$,')'); - } + { $$ = newOP($1, 0);} + | FUNC0OP /* Same as above, but op created in toke.c */ + { $$ = $1; } + | FUNC0OP '(' ')' + { $$ = $1; } | FUNC0SUB /* Sub treated as nullop */ - { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - scalar($1)); } + { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } | FUNC1 '(' ')' /* not () */ - { $$ = (IVAL($1) == OP_NOT) - ? newUNOP(IVAL($1), 0, newSVOP(OP_CONST, 0, newSViv(0))) - : newOP(IVAL($1), OPf_SPECIAL); - - TOKEN_GETMAD($1,$$,'o'); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($3,$$,')'); - } + { $$ = ($1 == OP_NOT) + ? newUNOP($1, 0, newSVOP(OP_CONST, 0, newSViv(0))) + : newOP($1, OPf_SPECIAL); } | FUNC1 '(' expr ')' /* not($foo) */ - { $$ = newUNOP(IVAL($1), 0, $3); - TOKEN_GETMAD($1,$$,'o'); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($4,$$,')'); - } - | PMFUNC '(' argexpr ')' /* m//, s///, tr/// */ - { $$ = pmruntime($1, $3, 1); - TOKEN_GETMAD($2,$$,'('); - TOKEN_GETMAD($4,$$,')'); - } + { $$ = newUNOP($1, 0, $3); } + | PMFUNC /* m//, s///, qr//, tr/// */ + { + if ( $1->op_type != OP_TRANS + && $1->op_type != OP_TRANSR + && (((PMOP*)$1)->op_pmflags & PMf_HAS_CV)) + { + $$ = start_subparse(FALSE, CVf_ANON); + SAVEFREESV(PL_compcv); + } else + $$ = 0; + } + '(' listexpr optrepl ')' + { $$ = pmruntime($1, $4, $5, 1, $2); } | WORD | listop | YADAYADA { $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0), newSVOP(OP_CONST, 0, newSVpvs("Unimplemented"))); - TOKEN_GETMAD($1,$$,'X'); } | PLUGEXPR ; /* "my" declarations, with optional attributes */ myattrterm: MY myterm myattrlist - { $$ = my_attrs($2,$3); - DO_MAD( - token_getmad($1,$$,'d'); - append_madprops($3->op_madprop, $$, 'a'); - $3->op_madprop = 0; - ) - } + { $$ = my_attrs($2,$3); } | MY myterm - { $$ = localize($2,IVAL($1)); - TOKEN_GETMAD($1,$$,'d'); - } + { $$ = localize($2,$1); } ; /* Things that can be "my"'d */ myterm : '(' expr ')' - { $$ = sawparens($2); - TOKEN_GETMAD($1,$$,'('); - TOKEN_GETMAD($3,$$,')'); - } + { $$ = sawparens($2); } | '(' ')' - { $$ = sawparens(newNULLLIST()); - TOKEN_GETMAD($1,$$,'('); - TOKEN_GETMAD($2,$$,')'); - } + { $$ = sawparens(newNULLLIST()); } + | scalar %prec '(' { $$ = $1; } | hsh %prec '(' @@ -1358,66 +1068,82 @@ myterm : '(' expr ')' ; /* Basic list expressions */ -listexpr: /* NULL */ %prec PREC_LOW +optlistexpr: /* NULL */ %prec PREC_LOW { $$ = (OP*)NULL; } - | argexpr %prec PREC_LOW + | listexpr %prec PREC_LOW { $$ = $1; } ; -listexprcom: /* NULL */ +optexpr: /* NULL */ { $$ = (OP*)NULL; } | expr { $$ = $1; } ; -lpar_or_qw: '(' - { $$ = $1; } - | QWLIST - { munge_qwlist_to_paren_list($1); } - '(' - { $$ = $3; } +optrepl: /* NULL */ + { $$ = (OP*)NULL; } + | '/' expr + { $$ = $2; } ; /* A little bit of trickery to make "for my $foo (@bar)" actually be lexical */ my_scalar: scalar - { PL_parser->in_my = 0; $$ = my($1); } + { parser->in_my = 0; $$ = my($1); } + ; + +my_var : scalar + | ary + | hsh + ; + +refgen_topic: my_var + | amper ; amper : '&' indirob - { $$ = newCVREF(IVAL($1),$2); - TOKEN_GETMAD($1,$$,'&'); - } + { $$ = newCVREF($1,$2); } ; scalar : '$' indirob - { $$ = newSVREF($2); - TOKEN_GETMAD($1,$$,'$'); - } + { $$ = newSVREF($2); } ; ary : '@' indirob { $$ = newAVREF($2); - TOKEN_GETMAD($1,$$,'@'); + if ($$) $$->op_private |= $1; } ; hsh : '%' indirob { $$ = newHVREF($2); - TOKEN_GETMAD($1,$$,'%'); + if ($$) $$->op_private |= $1; } ; arylen : DOLSHARP indirob - { $$ = newAVREF($2); - TOKEN_GETMAD($1,$$,'l'); - } + { $$ = newAVREF($2); } + | term ARROW DOLSHARP '*' + { $$ = newAVREF($1); } ; star : '*' indirob - { $$ = newGVREF(0,$2); - TOKEN_GETMAD($1,$$,'*'); - } + { $$ = newGVREF(0,$2); } + ; + +sliceme : ary + | term ARROW '@' + { $$ = newAVREF($1); } + ; + +kvslice : hsh + | term ARROW '%' + { $$ = newHVREF($1); } + ; + +gelem : star + | term ARROW '*' + { $$ = newGVREF(0,$1); } ; /* Indirect objects */ @@ -1426,7 +1152,7 @@ indirob : WORD | scalar %prec PREC_LOW { $$ = scalar($1); } | block - { $$ = scope($1); } + { $$ = op_scope($1); } | PRIVATEREF { $$ = $1; }