X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/a8812f5e4144abe77e484a03f0f8f3a838c5f319..f6ed098a25f4c61dd05c7be1848866390bba6799:/perly.y diff --git a/perly.y b/perly.y index ebcf5e7..596426f 100644 --- a/perly.y +++ b/perly.y @@ -49,7 +49,7 @@ /* FIXME for MAD - is the new mintro on while and until important? */ -%start prog +%start grammar %union { I32 ival; /* __DEFAULT__ (marker for regen_perly.pl; @@ -69,9 +69,11 @@ #endif } +%token GRAMPROG GRAMEXPR GRAMBLOCK GRAMBARESTMT GRAMFULLSTMT GRAMSTMTSEQ + %token '{' '}' '[' ']' '-' '+' '$' '@' '%' '*' '&' ';' -%token WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF +%token WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF QWLIST %token FUNC0SUB UNIOPSUB LSTOPSUB %token PLUGEXPR PLUGSTMT %token LABEL @@ -85,22 +87,20 @@ %token LOCAL MY MYSUB REQUIRE %token COLONATTR -%type prog progstart remember mremember +%type lpar_or_qw + +%type grammar remember mremember %type startsub startanonsub startformsub /* FIXME for MAD - are these two ival? */ %type mydefsv mintro -%type decl format subrout mysubrout package use peg - -%type block package_block mblock lineseq line loop cond else +%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 listexpr nexpr texpr iexpr mexpr mnexpr miexpr +%type optlistexpr optexpr indirob listop method %type formname subname proto subbody cont my_scalar %type subattrlist myattrlist myattrterm myterm %type termbinop termunop anonymous termdo -%type switch case -%type label %nonassoc PREC_LOW %nonassoc LOOPEX @@ -137,14 +137,74 @@ %% /* RULES */ -/* The whole program */ -prog : progstart - /*CONTINUED*/ lineseq - { $$ = $1; newPROG(block_end($1,$2)); } +/* Top-level choice of what kind of thing yyparse was called to parse */ +grammar : GRAMPROG + { + PL_parser->expect = XSTATE; + } + remember stmtseq + { + newPROG(block_end($3,$4)); + $$ = 0; + } + | GRAMEXPR + { + parser->expect = XTERM; + } + optexpr + { + 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; + } + | GRAMSTMTSEQ + { + parser->expect = XSTATE; + } + stmtseq + { + PL_eval_root = $3; + $$ = 0; + } ; /* An ordinary block */ -block : '{' remember lineseq '}' +block : '{' remember stmtseq '}' { if (PL_parser->copline > (line_t)IVAL($1)) PL_parser->copline = (line_t)IVAL($1); $$ = block_end($2, $3); @@ -161,14 +221,7 @@ mydefsv: /* NULL */ /* lexicalize $_ */ { $$ = (I32) Perl_allocmy(aTHX_ STR_WITH_LEN("$_"), 0); } ; -progstart: - { - PL_parser->expect = XSTATE; $$ = block_start(TRUE); - } - ; - - -mblock : '{' mremember lineseq '}' +mblock : '{' mremember stmtseq '}' { if (PL_parser->copline > (line_t)IVAL($1)) PL_parser->copline = (line_t)IVAL($1); $$ = block_end($2, $3); @@ -181,74 +234,275 @@ mremember: /* NULL */ /* start a partial lexical scope */ { $$ = block_start(FALSE); } ; -/* A collection of "lines" in the program */ -lineseq : /* NULL */ +/* A sequence of statements in the program */ +stmtseq : /* NULL */ { $$ = (OP*)NULL; } - | lineseq decl - { - $$ = IF_MAD( - append_list(OP_LINESEQ, - (LISTOP*)$1, (LISTOP*)$2), - $1); - } - | lineseq line - { $$ = append_list(OP_LINESEQ, - (LISTOP*)$1, (LISTOP*)$2); + | stmtseq fullstmt + { $$ = op_append_list(OP_LINESEQ, $1, $2); PL_pad_reset_pending = TRUE; if ($1 && $2) PL_hints |= HINT_BLOCK_SCOPE; } ; -/* A "line" in the program */ -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 statement in the program, including optional labels */ +fullstmt: barestmt + { + if($1) { + $$ = newSTATEOP(0, NULL, $1); + } else { + $$ = IF_MAD(newOP(OP_NULL, 0), NULL); + } + } + | labfullstmt { $$ = $1; } - | label case - { $$ = newSTATEOP(0, PVAL($1), $2); } - | label ';' + ; + +labfullstmt: LABEL barestmt { - if (PVAL($1)) { - $$ = newSTATEOP(0, PVAL($1), newOP(OP_NULL, 0)); - TOKEN_GETMAD($1,$$,'L'); - TOKEN_GETMAD($2,((LISTOP*)$$)->op_first,';'); + $$ = newSTATEOP(0, PVAL($1), $2); + TOKEN_GETMAD($1, + $2 ? cLISTOPx($$)->op_first : $$, 'L'); + } + | LABEL labfullstmt + { + $$ = newSTATEOP(0, PVAL($1), $2); + TOKEN_GETMAD($1, cLISTOPx($$)->op_first, 'L'); + } + ; + +/* A bare statement, lacking label and other aspects of state op */ +barestmt: PLUGSTMT + { $$ = $1; } + | PEG + { + $$ = newOP(OP_NULL,0); + TOKEN_GETMAD($1,$$,'p'); + } + | FORMAT startformsub formname block + { + CV *fmtcv = PL_compcv; + SvREFCNT_inc_simple_void(PL_compcv); +#ifdef MAD + $$ = 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); } - else { - $$ = IF_MAD( - newOP(OP_NULL, 0), - (OP*)NULL); - PL_parser->copline = NOLINE; - TOKEN_FREE($1); - TOKEN_GETMAD($2,$$,';'); + } + | 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 + } + | MYSUB startsub subname proto subattrlist subbody + { + /* Unimplemented "my sub foo { }" */ + 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); + $$ = (OP*)NULL; +#endif + } + | PACKAGE WORD WORD ';' + { +#ifdef MAD + $$ = package($3); + token_getmad($1,$$,'o'); + if ($2) + package_version($2); + token_getmad($4,$$,';'); +#else + package($3); + if ($2) + package_version($2); + $$ = (OP*)NULL; +#endif + } + | USE startsub + { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } + WORD WORD optlistexpr ';' + { + SvREFCNT_inc_simple_void(PL_compcv); +#ifdef MAD + $$ = 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 + } + | IF lpar_or_qw remember mexpr ')' mblock else + { + $$ = block_end($3, + newCONDOP(0, $4, op_scope($6), $7)); + TOKEN_GETMAD($1,$$,'I'); + TOKEN_GETMAD($2,$$,'('); + TOKEN_GETMAD($5,$$,')'); + PL_parser->copline = (line_t)IVAL($1); + } + | UNLESS lpar_or_qw remember miexpr ')' mblock else + { + $$ = block_end($3, + newCONDOP(0, $4, op_scope($6), $7)); + TOKEN_GETMAD($1,$$,'I'); + TOKEN_GETMAD($2,$$,'('); + TOKEN_GETMAD($5,$$,')'); + PL_parser->copline = (line_t)IVAL($1); + } + | GIVEN lpar_or_qw remember mydefsv mexpr ')' mblock + { + $$ = block_end($3, + newGIVENOP($5, op_scope($7), (PADOFFSET)$4)); + PL_parser->copline = (line_t)IVAL($1); + } + | WHEN lpar_or_qw remember mexpr ')' mblock + { $$ = block_end($3, newWHENOP($4, op_scope($6))); } + | DEFAULT block + { $$ = newWHENOP(0, op_scope($2)); } + | WHILE lpar_or_qw remember texpr ')' mintro mblock cont + { + $$ = block_end($3, + newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + $4, $7, $8, $6)); + TOKEN_GETMAD($1,$$,'W'); + TOKEN_GETMAD($2,$$,'('); + TOKEN_GETMAD($5,$$,')'); + PL_parser->copline = (line_t)IVAL($1); + } + | UNTIL lpar_or_qw remember iexpr ')' mintro mblock cont + { + $$ = block_end($3, + newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + $4, $7, $8, $6)); + TOKEN_GETMAD($1,$$,'W'); + TOKEN_GETMAD($2,$$,'('); + TOKEN_GETMAD($5,$$,')'); + PL_parser->copline = (line_t)IVAL($1); + } + | FOR lpar_or_qw remember mnexpr ';' texpr ';' mintro mnexpr ')' + mblock + { + OP *initop = IF_MAD($4 ? $4 : newOP(OP_NULL, 0), $4); + OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + scalar($6), $11, $9, $8); + if (initop) { + forop = op_prepend_elem(OP_LINESEQ, initop, + op_append_elem(OP_LINESEQ, + newOP(OP_UNSTACK, OPf_SPECIAL), + forop)); + } + DO_MAD({ forop = newUNOP(OP_NULL, 0, forop); }) + $$ = block_end($3, forop); + TOKEN_GETMAD($1,$$,'3'); + TOKEN_GETMAD($2,$$,'('); + TOKEN_GETMAD($5,$$,'1'); + TOKEN_GETMAD($7,$$,'2'); + TOKEN_GETMAD($10,$$,')'); + PL_parser->copline = (line_t)IVAL($1); + } + | FOR MY remember my_scalar lpar_or_qw mexpr ')' mblock cont + { + $$ = block_end($3, newFOROP(0, $4, $6, $8, $9)); + TOKEN_GETMAD($1,$$,'W'); + TOKEN_GETMAD($2,$$,'d'); + TOKEN_GETMAD($5,$$,'('); + TOKEN_GETMAD($7,$$,')'); + PL_parser->copline = (line_t)IVAL($1); + } + | FOR scalar lpar_or_qw remember mexpr ')' mblock cont + { + $$ = block_end($4, newFOROP(0, + op_lvalue($2, OP_ENTERLOOP), $5, $7, $8)); + TOKEN_GETMAD($1,$$,'W'); + TOKEN_GETMAD($3,$$,'('); + TOKEN_GETMAD($6,$$,')'); + PL_parser->copline = (line_t)IVAL($1); + } + | FOR lpar_or_qw remember mexpr ')' mblock cont + { + $$ = block_end($3, + newFOROP(0, (OP*)NULL, $4, $6, $7)); + TOKEN_GETMAD($1,$$,'W'); + TOKEN_GETMAD($2,$$,'('); + TOKEN_GETMAD($5,$$,')'); + PL_parser->copline = (line_t)IVAL($1); + } + | block cont + { + /* a block is a loop that happens once */ + $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + (OP*)NULL, $1, $2, 0); + } + | PACKAGE WORD WORD '{' remember + { + int save_3_latefree = $3->op_latefree; + $3->op_latefree = 1; + package($3); + $3->op_latefree = save_3_latefree; + if ($2) { + int save_2_latefree = $2->op_latefree; + $2->op_latefree = 1; + package_version($2); + $2->op_latefree = save_2_latefree; + } + } + stmtseq '}' + { + /* a block is a loop that happens once */ + $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, + (OP*)NULL, block_end($5, $7), (OP*)NULL, 0); + op_free($3); + if ($2) + op_free($2); + TOKEN_GETMAD($4,$$,'{'); + TOKEN_GETMAD($8,$$,'}'); + if (PL_parser->copline > (line_t)IVAL($4)) + PL_parser->copline = (line_t)IVAL($4); + } + | sideff ';' + { PL_parser->expect = XSTATE; + $$ = $1; + TOKEN_GETMAD($2,$$,';'); } - | label sideff ';' + | ';' { - $$ = newSTATEOP(0, PVAL($1), $2); PL_parser->expect = XSTATE; - DO_MAD({ - /* sideff might already have a nexstate */ - OP* op = ((LISTOP*)$$)->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,';'); - } - }) + $$ = IF_MAD(newOP(OP_NULL, 0), (OP*)NULL); + TOKEN_GETMAD($1,$$,';'); + PL_parser->copline = NOLINE; } - | 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); } ; /* An expression which may have a side-effect */ @@ -273,172 +527,45 @@ sideff : error TOKEN_GETMAD($2,$$,'w'); } | expr FOR expr - { $$ = 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); + TOKEN_GETMAD($2,$$,'w'); + PL_parser->copline = (line_t)IVAL($2); } | expr WHEN expr - { $$ = newWHENOP($3, scope($1)); } + { $$ = newWHENOP($3, op_scope($1)); } ; /* else and elsif blocks */ else : /* NULL */ { $$ = (OP*)NULL; } | ELSE mblock - { ($2)->op_flags |= OPf_PARENS; $$ = scope($2); + { + ($2)->op_flags |= OPf_PARENS; + $$ = op_scope($2); TOKEN_GETMAD($1,$$,'o'); } - | ELSIF '(' mexpr ')' mblock else + | ELSIF lpar_or_qw mexpr ')' mblock else { PL_parser->copline = (line_t)IVAL($1); - $$ = newCONDOP(0, newSTATEOP(OPf_SPECIAL,NULL,$3), scope($5), $6); - PL_hints |= HINT_BLOCK_SCOPE; + $$ = newCONDOP(0, + newSTATEOP(OPf_SPECIAL,NULL,$3), + op_scope($5), $6); + PL_hints |= HINT_BLOCK_SCOPE; TOKEN_GETMAD($1,$$,'I'); TOKEN_GETMAD($2,$$,'('); TOKEN_GETMAD($4,$$,')'); } ; -/* Real conditional expressions */ -cond : IF '(' 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 '(' 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,$$,'('); - TOKEN_GETMAD($5,$$,')'); - } - ; - -/* Cases for a switch statement */ -case : WHEN '(' 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); + { + $$ = op_scope($2); TOKEN_GETMAD($1,$$,'o'); } ; -/* Loops: while, until, for, and a bare block */ -loop : label WHILE '(' remember texpr ')' mintro mblock cont - { OP *innerop; - PL_parser->copline = (line_t)IVAL($2); - $$ = block_end($4, - newSTATEOP(0, PVAL($1), - innerop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, - IVAL($2), $5, $8, $9, $7))); - TOKEN_GETMAD($1,innerop,'L'); - TOKEN_GETMAD($2,innerop,'W'); - TOKEN_GETMAD($3,innerop,'('); - TOKEN_GETMAD($6,innerop,')'); - } - - | label UNTIL '(' remember iexpr ')' mintro mblock cont - { OP *innerop; - PL_parser->copline = (line_t)IVAL($2); - $$ = 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 '(' mexpr ')' mblock cont - { OP *innerop; - $$ = block_end($4, - innerop = newFOROP(0, PVAL($1), (line_t)IVAL($2), - $5, $7, $9, $10)); - TOKEN_GETMAD($1,((LISTOP*)innerop)->op_first,'L'); - TOKEN_GETMAD($2,((LISTOP*)innerop)->op_first->op_sibling,'W'); - TOKEN_GETMAD($3,((LISTOP*)innerop)->op_first->op_sibling,'d'); - TOKEN_GETMAD($6,((LISTOP*)innerop)->op_first->op_sibling,'('); - TOKEN_GETMAD($8,((LISTOP*)innerop)->op_first->op_sibling,')'); - } - | label FOR scalar '(' remember mexpr ')' mblock cont - { OP *innerop; - $$ = 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 '(' remember mexpr ')' mblock cont - { OP *innerop; - $$ = block_end($4, - innerop = newFOROP(0, PVAL($1), (line_t)IVAL($2), - (OP*)NULL, $5, $7, $8)); - TOKEN_GETMAD($1,((LISTOP*)innerop)->op_first,'L'); - TOKEN_GETMAD($2,((LISTOP*)innerop)->op_first->op_sibling,'W'); - TOKEN_GETMAD($3,((LISTOP*)innerop)->op_first->op_sibling,'('); - TOKEN_GETMAD($6,((LISTOP*)innerop)->op_first->op_sibling,')'); - } - | label FOR '(' remember mnexpr ';' texpr ';' mintro mnexpr ')' - mblock - /* basically fake up an initialize-while lineseq */ - { OP *forop; - PL_parser->copline = (line_t)IVAL($2); - forop = newSTATEOP(0, PVAL($1), - newWHILEOP(0, 1, (LOOP*)(OP*)NULL, - IVAL($2), scalar($7), - $12, $10, $9)); -#ifdef MAD - forop = newUNOP(OP_NULL, 0, append_elem(OP_LINESEQ, - newSTATEOP(0, - CopLABEL_alloc(($1)->tk_lval.pval), - ($5 ? $5 : newOP(OP_NULL, 0)) ), - forop)); - - token_getmad($2,forop,'3'); - token_getmad($3,forop,'('); - token_getmad($6,forop,'1'); - token_getmad($8,forop,'2'); - token_getmad($11,forop,')'); - token_getmad($1,forop,'L'); -#else - if ($5) { - forop = append_elem(OP_LINESEQ, - newSTATEOP(0, CopLABEL_alloc($1), $5), - forop); - } - - -#endif - $$ = 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 '(' remember mydefsv mexpr ')' mblock - { PL_parser->copline = (line_t) IVAL($2); - $$ = block_end($4, - newSTATEOP(0, PVAL($1), - newGIVENOP($6, scope($8), - (PADOFFSET) $5) )); } - ; - /* determine whether there are any new my declarations */ mintro : /* NULL */ { $$ = (PL_min_intro_pending && @@ -477,104 +604,10 @@ 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); } @@ -647,66 +680,6 @@ subbody : block { $$ = $1; } } ; -package : PACKAGE WORD WORD ';' - { -#ifdef MAD - $$ = package($3); - token_getmad($1,$$,'o'); - if ($2) - package_version($2); - token_getmad($4,$$,';'); -#else - package($3); - if ($2) - package_version($2); - $$ = (OP*)NULL; -#endif - } - ; - -package_block: PACKAGE WORD WORD '{' remember - { - int save_3_latefree = $3->op_latefree; - $3->op_latefree = 1; - package($3); - $3->op_latefree = save_3_latefree; - if ($2) { - int save_2_latefree = $2->op_latefree; - $2->op_latefree = 1; - package_version($2); - $2->op_latefree = save_2_latefree; - } - } - lineseq '}' - { if (PL_parser->copline > (line_t)IVAL($4)) - PL_parser->copline = (line_t)IVAL($4); - $$ = block_end($5, $7); - TOKEN_GETMAD($4,$$,'{'); - TOKEN_GETMAD($8,$$,'}'); - op_free($3); - if ($2) - op_free($2); - } - ; - -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); - $$ = (OP*)NULL; -#endif - } - ; - /* Ordinary expressions; logical combinations */ expr : expr ANDOP expr { $$ = newLOGOP(OP_AND, 0, $1, $3); @@ -720,49 +693,49 @@ expr : expr ANDOP expr { $$ = newLOGOP(OP_DOR, 0, $1, $3); TOKEN_GETMAD($2,$$,'o'); } - | argexpr %prec PREC_LOW + | listexpr %prec PREC_LOW ; /* Expressions are a list of terms joined by commas */ -argexpr : argexpr ',' +listexpr: listexpr ',' { #ifdef MAD OP* op = newNULLLIST(); token_getmad($2,op,','); - $$ = append_elem(OP_LIST, $1, op); + $$ = op_append_elem(OP_LIST, $1, op); #else $$ = $1; #endif } - | argexpr ',' term + | listexpr ',' term { OP* term = $3; DO_MAD( term = newUNOP(OP_NULL, 0, term); token_getmad($2,term,','); ) - $$ = append_elem(OP_LIST, $1, term); + $$ = op_append_elem(OP_LIST, $1, term); } | term %prec PREC_LOW ; /* List operators */ -listop : LSTOP indirob argexpr /* map {...} @args or print $fh @args */ +listop : LSTOP indirob listexpr /* map {...} @args or print $fh @args */ { $$ = convert(IVAL($1), OPf_STACKED, - prepend_elem(OP_LIST, newGVREF(IVAL($1),$2), $3) ); + op_prepend_elem(OP_LIST, newGVREF(IVAL($1),$2), $3) ); TOKEN_GETMAD($1,$$,'o'); } | FUNC '(' indirob expr ')' /* print ($fh @args */ { $$ = convert(IVAL($1), OPf_STACKED, - prepend_elem(OP_LIST, newGVREF(IVAL($1),$3), $4) ); + op_prepend_elem(OP_LIST, newGVREF(IVAL($1),$3), $4) ); TOKEN_GETMAD($1,$$,'o'); TOKEN_GETMAD($2,$$,'('); TOKEN_GETMAD($5,$$,')'); } - | term ARROW method '(' listexprcom ')' /* $foo->bar(list) */ + | term ARROW method lpar_or_qw optexpr ')' /* $foo->bar(list) */ { $$ = convert(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, - prepend_elem(OP_LIST, scalar($1), $5), + op_append_elem(OP_LIST, + op_prepend_elem(OP_LIST, scalar($1), $5), newUNOP(OP_METHOD, 0, $3))); TOKEN_GETMAD($2,$$,'A'); TOKEN_GETMAD($4,$$,'('); @@ -770,29 +743,29 @@ listop : LSTOP indirob argexpr /* map {...} @args or print $fh @args */ } | term ARROW method /* $foo->bar */ { $$ = convert(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, scalar($1), + op_append_elem(OP_LIST, scalar($1), newUNOP(OP_METHOD, 0, $3))); TOKEN_GETMAD($2,$$,'A'); } - | METHOD indirob listexpr /* new Class @args */ + | METHOD indirob optlistexpr /* new Class @args */ { $$ = convert(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, - prepend_elem(OP_LIST, $2, $3), + op_append_elem(OP_LIST, + op_prepend_elem(OP_LIST, $2, $3), newUNOP(OP_METHOD, 0, $1))); } - | FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */ + | FUNCMETH indirob '(' optexpr ')' /* method $object (@args) */ { $$ = convert(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, - prepend_elem(OP_LIST, $2, $4), + 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 */ + | LSTOP optlistexpr /* print @args */ { $$ = convert(IVAL($1), 0, $2); TOKEN_GETMAD($1,$$,'o'); } - | FUNC '(' listexprcom ')' /* print (@args) */ + | FUNC '(' optexpr ')' /* print (@args) */ { $$ = convert(IVAL($1), 0, $3); TOKEN_GETMAD($1,$$,'o'); TOKEN_GETMAD($2,$$,'('); @@ -801,10 +774,10 @@ listop : LSTOP indirob argexpr /* map {...} @args or print $fh @args */ | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */ { SvREFCNT_inc_simple_void(PL_compcv); $$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); } - listexpr %prec LSTOP /* ... @bar */ + optlistexpr %prec LSTOP /* ... @bar */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, - prepend_elem(OP_LIST, $4, $5), $1)); + op_append_elem(OP_LIST, + op_prepend_elem(OP_LIST, $4, $5), $1)); } ; @@ -878,21 +851,21 @@ subscripted: star '{' expr ';' '}' /* *main::{something} */ } | term ARROW '(' expr ')' /* $subref->(@args) */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, $4, + op_append_elem(OP_LIST, $4, newCVREF(0, scalar($1)))); TOKEN_GETMAD($2,$$,'a'); TOKEN_GETMAD($3,$$,'('); TOKEN_GETMAD($5,$$,')'); } - | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ + | subscripted lpar_or_qw expr ')' /* $foo->{bar}->(@args) */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, $3, + op_append_elem(OP_LIST, $3, newCVREF(0, scalar($1)))); TOKEN_GETMAD($2,$$,'('); TOKEN_GETMAD($4,$$,')'); } - | subscripted '(' ')' /* $foo->{bar}->() */ + | subscripted lpar_or_qw ')' /* $foo->{bar}->() */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, newCVREF(0, scalar($1))); TOKEN_GETMAD($2,$$,'('); @@ -905,6 +878,11 @@ subscripted: star '{' expr ';' '}' /* *main::{something} */ TOKEN_GETMAD($4,$$,'['); TOKEN_GETMAD($6,$$,']'); } + | QWLIST '[' expr ']' /* list literal slice */ + { $$ = newSLICEOP(0, $3, $1); + TOKEN_GETMAD($2,$$,'['); + TOKEN_GETMAD($4,$$,']'); + } | '(' ')' '[' expr ']' /* empty list slice! */ { $$ = newSLICEOP(0, $4, (OP*)NULL); TOKEN_GETMAD($1,$$,'('); @@ -1008,22 +986,22 @@ termunop : '-' term %prec UMINUS /* -$x */ } | term POSTINC /* $x++ */ { $$ = newUNOP(OP_POSTINC, 0, - mod(scalar($1), OP_POSTINC)); + op_lvalue(scalar($1), OP_POSTINC)); TOKEN_GETMAD($2,$$,'o'); } | term POSTDEC /* $x-- */ { $$ = newUNOP(OP_POSTDEC, 0, - mod(scalar($1), OP_POSTDEC)); + op_lvalue(scalar($1), OP_POSTDEC)); TOKEN_GETMAD($2,$$,'o'); } | PREINC term /* ++$x */ { $$ = newUNOP(OP_PREINC, 0, - mod(scalar($2), OP_PREINC)); + op_lvalue(scalar($2), OP_PREINC)); TOKEN_GETMAD($1,$$,'o'); } | PREDEC term /* --$x */ { $$ = newUNOP(OP_PREDEC, 0, - mod(scalar($2), OP_PREDEC)); + op_lvalue(scalar($2), OP_PREDEC)); TOKEN_GETMAD($1,$$,'o'); } @@ -1068,13 +1046,13 @@ termdo : DO term %prec UNIOP /* do $filename */ TOKEN_GETMAD($1,$$,'o'); } | DO block %prec '(' /* do { code */ - { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); + { $$ = newUNOP(OP_NULL, OPf_SPECIAL, op_scope($2)); TOKEN_GETMAD($1,$$,'D'); } - | DO WORD '(' ')' /* do somesub() */ + | DO WORD lpar_or_qw ')' /* do somesub() */ { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, - prepend_elem(OP_LIST, + op_prepend_elem(OP_LIST, scalar(newCVREF( (OPpENTERSUB_AMPER<<8), scalar($2) @@ -1083,10 +1061,10 @@ termdo : DO term %prec UNIOP /* do $filename */ TOKEN_GETMAD($3,$$,'('); TOKEN_GETMAD($4,$$,')'); } - | DO WORD '(' expr ')' /* do somesub(@args) */ + | DO WORD lpar_or_qw expr ')' /* do somesub(@args) */ { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, - append_elem(OP_LIST, + op_append_elem(OP_LIST, $4, scalar(newCVREF( (OPpENTERSUB_AMPER<<8), @@ -1096,17 +1074,17 @@ termdo : DO term %prec UNIOP /* do $filename */ TOKEN_GETMAD($3,$$,'('); TOKEN_GETMAD($5,$$,')'); } - | DO scalar '(' ')' /* do $subref () */ + | DO scalar lpar_or_qw ')' /* do $subref () */ { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, - prepend_elem(OP_LIST, + op_prepend_elem(OP_LIST, scalar(newCVREF(0,scalar($2))), (OP*)NULL)); dep(); TOKEN_GETMAD($1,$$,'o'); TOKEN_GETMAD($3,$$,'('); TOKEN_GETMAD($4,$$,')'); } - | DO scalar '(' expr ')' /* do $subref (@args) */ + | DO scalar lpar_or_qw expr ')' /* do $subref (@args) */ { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, - prepend_elem(OP_LIST, + op_prepend_elem(OP_LIST, $4, scalar(newCVREF(0,scalar($2))))); dep(); TOKEN_GETMAD($1,$$,'o'); @@ -1126,7 +1104,7 @@ term : termbinop TOKEN_GETMAD($4,$$,':'); } | REFGEN term /* \$x, \@y, \%z */ - { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); + { $$ = newUNOP(OP_REFGEN, 0, op_lvalue($2,OP_REFGEN)); TOKEN_GETMAD($1,$$,'o'); } | myattrterm %prec UNIOP @@ -1140,6 +1118,8 @@ term : termbinop TOKEN_GETMAD($1,$$,'('); TOKEN_GETMAD($3,$$,')'); } + | QWLIST + { $$ = IF_MAD(newUNOP(OP_NULL,0,$1), $1); } | '(' ')' { $$ = sawparens(newNULLLIST()); TOKEN_GETMAD($1,$$,'('); @@ -1158,7 +1138,7 @@ term : termbinop | subscripted { $$ = $1; } | ary '[' expr ']' /* array slice */ - { $$ = prepend_elem(OP_ASLICE, + { $$ = op_prepend_elem(OP_ASLICE, newOP(OP_PUSHMARK, 0), newLISTOP(OP_ASLICE, 0, list($3), @@ -1167,7 +1147,7 @@ term : termbinop TOKEN_GETMAD($4,$$,']'); } | ary '{' expr ';' '}' /* @hash{@keys} */ - { $$ = prepend_elem(OP_HSLICE, + { $$ = op_prepend_elem(OP_HSLICE, newOP(OP_PUSHMARK, 0), newLISTOP(OP_HSLICE, 0, list($3), @@ -1181,15 +1161,15 @@ term : termbinop { $$ = $1; } | amper /* &foo; */ { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } - | amper '(' ')' /* &foo() */ + | amper lpar_or_qw ')' /* &foo() */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); TOKEN_GETMAD($2,$$,'('); TOKEN_GETMAD($3,$$,')'); } - | amper '(' expr ')' /* &foo(@args) */ + | amper lpar_or_qw expr ')' /* &foo(@args) */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, $3, scalar($1))); + op_append_elem(OP_LIST, $3, scalar($1))); DO_MAD({ OP* op = $$; if (op->op_type == OP_CONST) { /* defeat const fold */ @@ -1199,9 +1179,9 @@ term : termbinop token_getmad($4,op,')'); }) } - | NOAMP WORD listexpr /* foo(@args) */ + | NOAMP WORD optlistexpr /* foo(@args) */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, $3, scalar($2))); + op_append_elem(OP_LIST, $3, scalar($2))); TOKEN_GETMAD($1,$$,'o'); } | LOOPEX /* loop exiting command (goto, last, dump, etc) */ @@ -1213,7 +1193,7 @@ term : termbinop { $$ = newLOOPEX(IVAL($1),$2); TOKEN_GETMAD($1,$$,'o'); } - | NOTOP argexpr /* not $foo */ + | NOTOP listexpr /* not $foo */ { $$ = newUNOP(OP_NOT, 0, scalar($2)); TOKEN_GETMAD($1,$$,'o'); } @@ -1241,7 +1221,7 @@ term : termbinop { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } | UNIOPSUB term /* Sub treated as unop */ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, $2, scalar($1))); } + op_append_elem(OP_LIST, $2, scalar($1))); } | FUNC0 /* Nullary operator */ { $$ = newOP(IVAL($1), 0); TOKEN_GETMAD($1,$$,'o'); @@ -1270,7 +1250,7 @@ term : termbinop TOKEN_GETMAD($2,$$,'('); TOKEN_GETMAD($4,$$,')'); } - | PMFUNC '(' argexpr ')' /* m//, s///, tr/// */ + | PMFUNC '(' listexpr ')' /* m//, s///, tr/// */ { $$ = pmruntime($1, $3, 1); TOKEN_GETMAD($2,$$,'('); TOKEN_GETMAD($4,$$,')'); @@ -1321,18 +1301,26 @@ 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; } + ; + /* A little bit of trickery to make "for my $foo (@bar)" actually be lexical */ my_scalar: scalar @@ -1381,7 +1369,7 @@ indirob : WORD | scalar %prec PREC_LOW { $$ = scalar($1); } | block - { $$ = scope($1); } + { $$ = op_scope($1); } | PRIVATEREF { $$ = $1; }