X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=perly.y;h=88eee99f3e5c85b1ae5de0ece6905fa4f4f8cbad;hb=cb86ce0e71355d781c8bc843c5a2c7c61381dce9;hp=a281dff9b96d14089edcba8fe6f485300a7c8271;hpb=71be2cbc73608e37e1a2ab7e459a02111137d1b0;p=p5sagit%2Fp5-mst-13.2.git diff --git a/perly.y b/perly.y index a281dff..88eee99 100644 --- a/perly.y +++ b/perly.y @@ -1,6 +1,6 @@ /* perly.y * - * Copyright (c) 1991-1994, Larry Wall + * Copyright (c) 1991-1997, Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. @@ -9,7 +9,7 @@ /* * 'I see,' laughed Strider. 'I look foul and feel fair. Is that it? - * All that is gold does not glitter, not all those that wander are lost.' + * All that is gold does not glitter, not all those who wander are lost.' */ %{ @@ -17,7 +17,7 @@ #include "perl.h" static void -dep() +dep(void) { deprecate("\"do\" to call subroutines"); } @@ -26,6 +26,11 @@ dep() %start prog +%{ +/* I sense a Big Blue pattern here... */ +#if !defined(OEMVS) && !defined(__OPEN_VM) && !defined(POSIX_BC) +%} + %union { I32 ival; char *pval; @@ -33,6 +38,14 @@ dep() GV *gvval; } +%{ +#endif /* !OEMVS && !__OPEN_VM && !POSIX_BC */ + +#ifdef USE_PURE_BISON +#define YYLEX_PARAM (&yychar) +#endif +%} + %token '{' ')' %token WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF @@ -46,12 +59,13 @@ dep() %token DOLSHARP DO HASHBRACK NOAMP %token LOCAL MY -%type prog decl local format startsub remember mremember '&' +%type prog decl local format startsub startanonsub startformsub +%type remember mremember '&' %type block mblock lineseq line loop cond else %type expr term scalar ary hsh arylen star amper sideff %type argexpr nexpr texpr iexpr mexpr mnexpr mtexpr miexpr -%type listexpr listexprcom indirob -%type listop method proto cont my_scalar +%type listexpr listexprcom indirob listop method +%type formname subname proto subbody cont my_scalar %type label %left OROP @@ -84,17 +98,17 @@ dep() prog : /* NULL */ { #if defined(YYDEBUG) && defined(DEBUGGING) - yydebug = (debug & 1); + yydebug = (PL_debug & 1); #endif - expect = XSTATE; + PL_expect = XSTATE; } /*CONTINUED*/ lineseq { newPROG($2); } ; block : '{' remember lineseq '}' - { if (copline > (line_t)$1) - copline = $1; + { if (PL_copline > (line_t)$1) + PL_copline = $1; $$ = block_end($2, $3); } ; @@ -103,8 +117,8 @@ remember: /* NULL */ /* start a full lexical scope */ ; mblock : '{' mremember lineseq '}' - { if (copline > (line_t)$1) - copline = $1; + { if (PL_copline > (line_t)$1) + PL_copline = $1; $$ = block_end($2, $3); } ; @@ -119,8 +133,8 @@ lineseq : /* NULL */ | lineseq line { $$ = append_list(OP_LINESEQ, (LISTOP*)$1, (LISTOP*)$2); - pad_reset_pending = TRUE; - if ($1 && $2) hints |= HINT_BLOCK_SCOPE; } + PL_pad_reset_pending = TRUE; + if ($1 && $2) PL_hints |= HINT_BLOCK_SCOPE; } ; line : label cond @@ -132,12 +146,12 @@ line : label cond } else { $$ = Nullop; - copline = NOLINE; + PL_copline = NOLINE; } - expect = XSTATE; } + PL_expect = XSTATE; } | label sideff ';' { $$ = newSTATEOP(0, $1, $2); - expect = XSTATE; } + PL_expect = XSTATE; } ; sideff : error @@ -152,6 +166,9 @@ sideff : error { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } | expr UNTIL iexpr { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);} + | expr FOR expr + { $$ = newFOROP(0, Nullch, $2, + Nullop, $3, $1, Nullop); } ; else : /* NULL */ @@ -159,18 +176,18 @@ else : /* NULL */ | ELSE mblock { $$ = scope($2); } | ELSIF '(' mexpr ')' mblock else - { copline = $1; + { PL_copline = $1; $$ = newSTATEOP(0, Nullch, newCONDOP(0, $3, scope($5), $6)); - hints |= HINT_BLOCK_SCOPE; } + PL_hints |= HINT_BLOCK_SCOPE; } ; cond : IF '(' remember mexpr ')' mblock else - { copline = $1; + { PL_copline = $1; $$ = block_end($3, newCONDOP(0, $4, scope($6), $7)); } | UNLESS '(' remember miexpr ')' mblock else - { copline = $1; + { PL_copline = $1; $$ = block_end($3, newCONDOP(0, $4, scope($6), $7)); } ; @@ -182,17 +199,17 @@ cont : /* NULL */ ; loop : label WHILE '(' remember mtexpr ')' mblock cont - { copline = $2; + { PL_copline = $2; $$ = block_end($4, newSTATEOP(0, $1, newWHILEOP(0, 1, (LOOP*)Nullop, - $5, $7, $8))); } + $2, $5, $7, $8))); } | label UNTIL '(' remember miexpr ')' mblock cont - { copline = $2; + { PL_copline = $2; $$ = block_end($4, newSTATEOP(0, $1, newWHILEOP(0, 1, (LOOP*)Nullop, - $5, $7, $8))); } + $2, $5, $7, $8))); } | label FOR MY remember my_scalar '(' mexpr ')' mblock cont { $$ = block_end($4, newFOROP(0, $1, $2, $5, $7, $9, $10)); } @@ -205,17 +222,17 @@ loop : label WHILE '(' remember mtexpr ')' mblock cont newFOROP(0, $1, $2, Nullop, $5, $7, $8)); } | label FOR '(' remember mnexpr ';' mtexpr ';' mnexpr ')' mblock /* basically fake up an initialize-while lineseq */ - { copline = $2; - $$ = block_end($4, - append_elem(OP_LINESEQ, scalar($5), - newSTATEOP(0, $1, - newWHILEOP(0, 1, (LOOP*)Nullop, - scalar($7), - $11, scalar($9))))); } + { OP *forop = append_elem(OP_LINESEQ, + scalar($5), + newWHILEOP(0, 1, (LOOP*)Nullop, + $2, scalar($7), + $11, scalar($9))); + PL_copline = $2; + $$ = block_end($4, newSTATEOP(0, $1, forop)); } | label block cont /* a block is a loop that happens once */ - { $$ = newSTATEOP(0, - $1, newWHILEOP(0, 1, (LOOP*)Nullop, - Nullop, $2, $3)); } + { $$ = newSTATEOP(0, $1, + newWHILEOP(0, 1, (LOOP*)Nullop, + NOLINE, Nullop, $2, $3)); } ; nexpr : /* NULL */ @@ -263,25 +280,44 @@ decl : format { $$ = 0; } ; -format : FORMAT startsub WORD block +format : FORMAT startformsub formname block { newFORM($2, $3, $4); } - | FORMAT startsub block - { newFORM($2, Nullop, $3); } ; -subrout : SUB startsub WORD proto block +formname: WORD { $$ = $1; } + | /* NULL */ { $$ = Nullop; } + ; + +subrout : SUB startsub subname proto subbody { newSUB($2, $3, $4, $5); } - | SUB startsub WORD proto ';' - { newSUB($2, $3, $4, Nullop); expect = XSTATE; } + ; + +startsub: /* NULL */ /* start a regular subroutine scope */ + { $$ = start_subparse(FALSE, 0); } + ; + +startanonsub: /* NULL */ /* start an anonymous subroutine scope */ + { $$ = start_subparse(FALSE, CVf_ANON); } + ; + +startformsub: /* NULL */ /* start a format subroutine scope */ + { $$ = start_subparse(TRUE, 0); } + ; + +subname : WORD { STRLEN n_a; char *name = SvPV(((SVOP*)$1)->op_sv,n_a); + if (strEQ(name, "BEGIN") || strEQ(name, "END") + || strEQ(name, "INIT")) + CvUNIQUE_on(PL_compcv); + $$ = $1; } ; proto : /* NULL */ { $$ = Nullop; } | THING ; - -startsub: /* NULL */ /* start a subroutine scope */ - { $$ = start_subparse(); } + +subbody : block { $$ = $1; } + | ';' { $$ = Nullop; PL_expect = XSTATE; } ; package : PACKAGE WORD ';' @@ -290,8 +326,10 @@ package : PACKAGE WORD ';' { package(Nullop); } ; -use : USE startsub WORD WORD listexpr ';' - { utilize($1, $2, $3, $4, $5); } +use : USE startsub + { CvUNIQUE_on(PL_compcv); /* It's a BEGIN {} */ } + WORD WORD listexpr ';' + { utilize($1, $2, $4, $5, $6); } ; expr : expr ANDOP expr @@ -333,11 +371,12 @@ listop : LSTOP indirob argexpr { $$ = convert($1, 0, $2); } | FUNC '(' listexprcom ')' { $$ = convert($1, 0, $3); } - | LSTOPSUB startsub block listexpr %prec LSTOP + | LSTOPSUB startanonsub block + { $3 = newANONSUB($2, 0, $3); } + listexpr %prec LSTOP { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, - append_elem(OP_LIST, - prepend_elem(OP_LIST, newANONSUB($2, 0, $3), $4), - $1)); } + append_elem(OP_LIST, + prepend_elem(OP_LIST, $3, $5), $1)); } ; method : METHOD @@ -411,12 +450,12 @@ term : term ASSIGNOP term { $$ = newANONHASH($2); } | HASHBRACK ';' '}' %prec '(' { $$ = newANONHASH(Nullop); } - | ANONSUB startsub proto block %prec '(' + | ANONSUB startanonsub proto block %prec '(' { $$ = newANONSUB($2, $3, $4); } | scalar %prec '(' { $$ = $1; } | star '{' expr ';' '}' - { $$ = newBINOP(OP_GELEM, 0, newGVREF(0,$1), $3); } + { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); } | star %prec '(' { $$ = $1; } | scalar '[' expr ']' %prec '(' @@ -437,17 +476,17 @@ term : term ASSIGNOP term { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} | scalar '{' expr ';' '}' %prec '(' { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); - expect = XOPERATOR; } + PL_expect = XOPERATOR; } | term ARROW '{' expr ';' '}' %prec '(' { $$ = newBINOP(OP_HELEM, 0, ref(newHVREF($1),OP_RV2HV), jmaybe($4)); - expect = XOPERATOR; } + PL_expect = XOPERATOR; } | term '{' expr ';' '}' %prec '(' { assertref($1); $$ = newBINOP(OP_HELEM, 0, ref(newHVREF($1),OP_RV2HV), jmaybe($3)); - expect = XOPERATOR; } + PL_expect = XOPERATOR; } | '(' expr ')' '[' expr ']' %prec '(' { $$ = newSLICEOP(0, $5, $2); } | '(' ')' '[' expr ']' %prec '(' @@ -464,7 +503,7 @@ term : term ASSIGNOP term newLISTOP(OP_HSLICE, 0, list($3), ref(oopsHV($1), OP_HSLICE))); - expect = XOPERATOR; } + PL_expect = XOPERATOR; } | THING %prec '(' { $$ = $1; } | amper @@ -478,7 +517,7 @@ term : term ASSIGNOP term { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, $3, scalar($2))); } | DO term %prec UNIOP - { $$ = newUNOP(OP_DOFILE, 0, scalar($2)); } + { $$ = dofile($2); } | DO block %prec '(' { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); } | DO WORD '(' ')' @@ -507,9 +546,16 @@ term : term ASSIGNOP term prepend_elem(OP_LIST, $4, scalar(newCVREF(0,scalar($2))))); dep();} + | term ARROW '(' ')' %prec '(' + { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, + newCVREF(0, scalar($1))); } + | term ARROW '(' expr ')' %prec '(' + { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, + append_elem(OP_LIST, $4, + newCVREF(0, scalar($1)))); } | LOOPEX { $$ = newOP($1, OPf_SPECIAL); - hints |= HINT_BLOCK_SCOPE; } + PL_hints |= HINT_BLOCK_SCOPE; } | LOOPEX term { $$ = newLOOPEX($1,$2); } | NOTOP argexpr @@ -528,7 +574,7 @@ term : term ASSIGNOP term | FUNC0 '(' ')' { $$ = newOP($1, 0); } | FUNC0SUB - { $$ = newUNOP(OP_ENTERSUB, 0, + { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } | FUNC1 '(' ')' { $$ = newOP($1, OPf_SPECIAL); } @@ -561,7 +607,7 @@ local : LOCAL { $$ = 0; } ; my_scalar: scalar - { in_my = 0; $$ = my($1); } + { PL_in_my = 0; $$ = my($1); } ; amper : '&' indirob