/* perly.y
*
- * Copyright (c) 1991-1994, Larry Wall
+ * Copyright (c) 1991-2002, 2003, 2004, 2005, 2006 Larry Wall
+ * Copyright (c) 2007, 2008 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.
/*
* '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.'
+ *
+ * [p.171 of _The Lord of the Rings_, I/x: "Strider"]
*/
-%{
-#include "EXTERN.h"
-#include "perl.h"
+/*
+ * This file holds the grammar for the Perl language. If edited, you need
+ * 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.
+ *
+ * Note: due to the way that the cleanup code works WRT to freeing ops on
+ * the parse stack, it is dangerous to assign to the $n variables within
+ * an action.
+ */
-static void
-dep()
-{
- deprecate("\"do\" to call subroutines");
-}
+/* Make the parser re-entrant. */
+
+%pure_parser
-%}
+/* FIXME for MAD - is the new mintro on while and until important? */
%start prog
%union {
- I32 ival;
+ I32 ival; /* __DEFAULT__ (marker for regen_perly.pl;
+ must always be 1st union member) */
char *pval;
OP *opval;
GV *gvval;
+#ifdef PERL_IN_MADLY_C
+ TOKEN* p_tkval;
+ TOKEN* i_tkval;
+#else
+ char *p_tkval;
+ I32 i_tkval;
+#endif
+#ifdef PERL_MAD
+ TOKEN* tkval;
+#endif
}
-%token <ival> '{' ')'
+%token <i_tkval> '{' '}' '[' ']' '-' '+' '$' '@' '%' '*' '&' ';'
%token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF
%token <opval> FUNC0SUB UNIOPSUB LSTOPSUB
-%token <pval> LABEL
-%token <ival> FORMAT SUB ANONSUB PACKAGE USE
-%token <ival> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR
-%token <ival> LOOPEX DOTDOT
-%token <ival> FUNC0 FUNC1 FUNC
-%token <ival> RELOP EQOP MULOP ADDOP
-%token <ival> DOLSHARP DO LOCAL HASHBRACK NOAMP
-
-%type <ival> prog decl format remember startsub '&'
-%type <opval> block lineseq line loop cond nexpr else argexpr
-%type <opval> expr term scalar ary hsh arylen star amper sideff
-%type <opval> listexpr listexprcom indirob
-%type <opval> texpr listop method proto
-%type <pval> label
-%type <opval> cont
-
-%left <ival> OROP
-%left ANDOP
-%right NOTOP
-%nonassoc <ival> LSTOP
-%left ','
-%right <ival> ASSIGNOP
-%right '?' ':'
-%nonassoc DOTDOT
-%left OROR
-%left ANDAND
-%left <ival> BITOROP
-%left <ival> BITANDOP
+%token <p_tkval> LABEL
+%token <i_tkval> FORMAT SUB ANONSUB PACKAGE USE
+%token <i_tkval> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR
+%token <i_tkval> GIVEN WHEN DEFAULT
+%token <i_tkval> LOOPEX DOTDOT YADAYADA
+%token <i_tkval> FUNC0 FUNC1 FUNC UNIOP LSTOP
+%token <i_tkval> RELOP EQOP MULOP ADDOP
+%token <i_tkval> DOLSHARP DO HASHBRACK NOAMP
+%token <i_tkval> LOCAL MY MYSUB REQUIRE
+%token <i_tkval> COLONATTR
+
+%type <ival> prog progstart remember mremember
+%type <ival> startsub startanonsub startformsub
+/* FIXME for MAD - are these two ival? */
+%type <ival> mydefsv mintro
+
+%type <opval> decl format subrout mysubrout package use peg
+
+%type <opval> block mblock lineseq line loop cond else
+%type <opval> expr term subscripted scalar ary hsh arylen star amper sideff
+%type <opval> argexpr nexpr texpr iexpr mexpr mnexpr miexpr
+%type <opval> listexpr listexprcom indirob listop method
+%type <opval> formname subname proto subbody cont my_scalar
+%type <opval> subattrlist myattrlist myattrterm myterm
+%type <opval> termbinop termunop anonymous termdo
+%type <opval> switch case
+%type <p_tkval> label
+
+%nonassoc <i_tkval> PREC_LOW
+%nonassoc LOOPEX
+
+%left <i_tkval> OROP DOROP
+%left <i_tkval> ANDOP
+%right <i_tkval> NOTOP
+%nonassoc LSTOP LSTOPSUB
+%left <i_tkval> ','
+%right <i_tkval> ASSIGNOP
+%right <i_tkval> '?' ':'
+%nonassoc DOTDOT YADAYADA
+%left <i_tkval> OROR DORDOR
+%left <i_tkval> ANDAND
+%left <i_tkval> BITOROP
+%left <i_tkval> BITANDOP
%nonassoc EQOP
%nonassoc RELOP
-%nonassoc <ival> UNIOP
-%left <ival> SHIFTOP
+%nonassoc UNIOP UNIOPSUB
+%nonassoc REQUIRE
+%left <i_tkval> SHIFTOP
%left ADDOP
%left MULOP
-%left <ival> MATCHOP
-%right '!' '~' UMINUS REFGEN
-%right <ival> POWOP
-%nonassoc PREINC PREDEC POSTINC POSTDEC
-%left ARROW
-%left '('
+%left <i_tkval> MATCHOP
+%right <i_tkval> '!' '~' UMINUS REFGEN
+%right <i_tkval> POWOP
+%nonassoc <i_tkval> PREINC PREDEC POSTINC POSTDEC
+%left <i_tkval> ARROW
+%nonassoc <i_tkval> ')'
+%left <i_tkval> '('
+%left '[' '{'
+
+%token <i_tkval> PEG
%% /* RULES */
-prog : /* NULL */
- {
-#if defined(YYDEBUG) && defined(DEBUGGING)
- yydebug = (debug & 1);
-#endif
- expect = XSTATE;
- }
+/* The whole program */
+prog : progstart
/*CONTINUED*/ lineseq
- { newPROG($2); }
+ { $$ = $1; newPROG(block_end($1,$2)); }
;
+/* An ordinary block */
block : '{' remember lineseq '}'
- { $$ = block_end($1,$2,$3); }
+ { if (PL_parser->copline > (line_t)IVAL($1))
+ PL_parser->copline = (line_t)IVAL($1);
+ $$ = block_end($2, $3);
+ TOKEN_GETMAD($1,$$,'{');
+ TOKEN_GETMAD($4,$$,'}');
+ }
+ ;
+
+remember: /* NULL */ /* start a full lexical scope */
+ { $$ = block_start(TRUE); }
;
-remember: /* NULL */ /* start a lexical scope */
- { $$ = block_start(); }
+mydefsv: /* NULL */ /* lexicalize $_ */
+ { $$ = (I32) allocmy("$_"); }
;
+progstart:
+ {
+ PL_parser->expect = XSTATE; $$ = block_start(TRUE);
+ }
+ ;
+
+
+mblock : '{' mremember lineseq '}'
+ { if (PL_parser->copline > (line_t)IVAL($1))
+ PL_parser->copline = (line_t)IVAL($1);
+ $$ = block_end($2, $3);
+ TOKEN_GETMAD($1,$$,'{');
+ TOKEN_GETMAD($4,$$,'}');
+ }
+ ;
+
+mremember: /* NULL */ /* start a partial lexical scope */
+ { $$ = block_start(FALSE); }
+ ;
+
+/* A collection of "lines" in the program */
lineseq : /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| lineseq decl
- { $$ = $1; }
+ {
+ $$ = IF_MAD(
+ append_list(OP_LINESEQ,
+ (LISTOP*)$1, (LISTOP*)$2),
+ $1);
+ }
| lineseq line
{ $$ = 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;
+ }
;
+/* A "line" in the program */
line : label cond
- { $$ = newSTATEOP(0, $1, $2); }
+ { $$ = newSTATEOP(0, PVAL($1), $2);
+ TOKEN_GETMAD($1,((LISTOP*)$$)->op_first,'L'); }
| loop /* loops add their own labels */
+ | switch /* ... and so do switches */
+ { $$ = $1; }
+ | label case
+ { $$ = newSTATEOP(0, PVAL($1), $2); }
| label ';'
- { if ($1 != Nullch) {
- $$ = newSTATEOP(0, $1, newOP(OP_NULL, 0));
- }
- else {
- $$ = Nullop;
- copline = NOLINE;
- }
- expect = XSTATE; }
+ {
+ if (PVAL($1)) {
+ $$ = newSTATEOP(0, PVAL($1), newOP(OP_NULL, 0));
+ TOKEN_GETMAD($1,$$,'L');
+ TOKEN_GETMAD($2,((LISTOP*)$$)->op_first,';');
+ }
+ else {
+ $$ = IF_MAD(
+ newOP(OP_NULL, 0),
+ (OP*)NULL);
+ PL_parser->copline = NOLINE;
+ TOKEN_FREE($1);
+ TOKEN_GETMAD($2,$$,';');
+ }
+ PL_parser->expect = XSTATE;
+ }
| label sideff ';'
- { $$ = newSTATEOP(0, $1, $2);
- expect = XSTATE; }
+ {
+ $$ = newSTATEOP(0, PVAL($1), $2);
+ PL_parser->expect = XSTATE;
+ DO_MAD({
+ /* sideff might already have a nexstate */
+ OP* op = ((LISTOP*)$$)->op_first;
+ if (op) {
+ while (op->op_sibling &&
+ op->op_sibling->op_type == OP_NEXTSTATE)
+ op = op->op_sibling;
+ token_getmad($1,op,'L');
+ token_getmad($3,op,';');
+ }
+ })
+ }
;
+/* An expression which may have a side-effect */
sideff : error
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| expr
{ $$ = $1; }
| expr IF expr
- { $$ = newLOGOP(OP_AND, 0, $3, $1); }
+ { $$ = newLOGOP(OP_AND, 0, $3, $1);
+ TOKEN_GETMAD($2,$$,'i');
+ }
| expr UNLESS expr
- { $$ = newLOGOP(OP_OR, 0, $3, $1); }
+ { $$ = newLOGOP(OP_OR, 0, $3, $1);
+ TOKEN_GETMAD($2,$$,'i');
+ }
| expr WHILE expr
- { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); }
- | expr UNTIL expr
- { $$ = newLOOPOP(OPf_PARENS, 1, invert(scalar($3)), $1);}
+ { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1);
+ TOKEN_GETMAD($2,$$,'w');
+ }
+ | expr UNTIL iexpr
+ { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);
+ TOKEN_GETMAD($2,$$,'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');
+ }
;
+/* else and elsif blocks */
else : /* NULL */
- { $$ = Nullop; }
- | ELSE block
- { $$ = scope($2); }
- | ELSIF '(' expr ')' block else
- { copline = $1;
- $$ = newSTATEOP(0, 0,
- newCONDOP(0, $3, scope($5), $6));
- hints |= HINT_BLOCK_SCOPE; }
- ;
-
-cond : IF '(' expr ')' block else
- { copline = $1;
- $$ = newCONDOP(0, $3, scope($5), $6); }
- | UNLESS '(' expr ')' block else
- { copline = $1;
- $$ = newCONDOP(0,
- invert(scalar($3)), scope($5), $6); }
- | IF block block else
- { copline = $1;
- deprecate("if BLOCK BLOCK");
- $$ = newCONDOP(0, scope($2), scope($3), $4); }
- | UNLESS block block else
- { copline = $1;
- deprecate("unless BLOCK BLOCK");
- $$ = newCONDOP(0, invert(scalar(scope($2))),
- scope($3), $4); }
+ { $$ = (OP*)NULL; }
+ | ELSE mblock
+ { ($2)->op_flags |= OPf_PARENS; $$ = scope($2);
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | ELSIF '(' 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,$$,'(');
+ TOKEN_GETMAD($4,$$,')');
+ }
+ ;
+
+/* 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 */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| CONTINUE block
- { $$ = scope($2); }
- ;
-
-loop : label WHILE '(' texpr ')' block cont
- { copline = $2;
- $$ = newSTATEOP(0, $1,
- newWHILEOP(0, 1, (LOOP*)Nullop,
- $4, $6, $7) ); }
- | label UNTIL '(' expr ')' block cont
- { copline = $2;
- $$ = newSTATEOP(0, $1,
- newWHILEOP(0, 1, (LOOP*)Nullop,
- invert(scalar($4)), $6, $7) ); }
- | label WHILE block block cont
- { copline = $2;
- $$ = newSTATEOP(0, $1,
- newWHILEOP(0, 1, (LOOP*)Nullop,
- scope($3), $4, $5) ); }
- | label UNTIL block block cont
- { copline = $2;
- $$ = newSTATEOP(0, $1,
- newWHILEOP(0, 1, (LOOP*)Nullop,
- invert(scalar(scope($3))), $4, $5)); }
- | label FOR scalar '(' expr ')' block cont
- { $$ = newFOROP(0, $1, $2, mod($3, OP_ENTERLOOP),
- $5, $7, $8); }
- | label FOR '(' expr ')' block cont
- { $$ = newFOROP(0, $1, $2, Nullop, $4, $6, $7); }
- | label FOR '(' nexpr ';' texpr ';' nexpr ')' block
+ { $$ = scope($2);
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ ;
+
+/* Loops: while, until, for, and a bare block */
+loop : label WHILE '(' remember texpr ')' mintro mblock cont
+ { OP *innerop;
+ PL_parser->copline = (line_t)$2;
+ $$ = 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)$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 */
- { copline = $2;
- $$ = append_elem(OP_LINESEQ,
- newSTATEOP(0, $1, scalar($4)),
- newSTATEOP(0, $1,
- newWHILEOP(0, 1, (LOOP*)Nullop,
- scalar($6), $10, scalar($8)) )); }
+ { OP *forop;
+ PL_parser->copline = (line_t)IVAL($2);
+ forop = newSTATEOP(0, PVAL($1),
+ newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
+ IVAL($2), scalar($7),
+ $12, $10, $9));
+#ifdef MAD
+ forop = newUNOP(OP_NULL, 0, append_elem(OP_LINESEQ,
+ newSTATEOP(0,
+ CopLABEL_alloc(($1)->tk_lval.pval),
+ ($5 ? $5 : newOP(OP_NULL, 0)) ),
+ forop));
+
+ token_getmad($2,forop,'3');
+ token_getmad($3,forop,'(');
+ token_getmad($6,forop,'1');
+ token_getmad($8,forop,'2');
+ token_getmad($11,forop,')');
+ token_getmad($1,forop,'L');
+#else
+ if ($5) {
+ forop = append_elem(OP_LINESEQ,
+ newSTATEOP(0, CopLABEL_alloc($1), $5),
+ forop);
+ }
+
+
+#endif
+ $$ = block_end($4, forop); }
| label block cont /* a block is a loop that happens once */
- { $$ = newSTATEOP(0,
- $1, newWHILEOP(0, 1, (LOOP*)Nullop,
- Nullop, $2, $3)); }
+ { $$ = newSTATEOP(0, PVAL($1),
+ newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
+ NOLINE, (OP*)NULL, $2, $3, 0));
+ TOKEN_GETMAD($1,((LISTOP*)$$)->op_first,'L'); }
;
+/* Switch blocks */
+switch : label GIVEN '(' remember mydefsv mexpr ')' mblock
+ { PL_parser->copline = (line_t) $2;
+ $$ = block_end($4,
+ newSTATEOP(0, PVAL($1),
+ newGIVENOP($6, scope($8),
+ (PADOFFSET) $5) )); }
+ ;
+
+/* determine whether there are any new my declarations */
+mintro : /* NULL */
+ { $$ = (PL_min_intro_pending &&
+ PL_max_intro_pending >= PL_min_intro_pending);
+ intro_my(); }
+
+/* Normal expression */
nexpr : /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| sideff
;
+/* Boolean expression */
texpr : /* NULL means true */
- { (void)scan_num("1"); $$ = yylval.opval; }
+ { YYSTYPE tmplval;
+ (void)scan_num("1", &tmplval);
+ $$ = tmplval.opval; }
| expr
;
+/* Inverted boolean expression */
+iexpr : expr
+ { $$ = invert(scalar($1)); }
+ ;
+
+/* Expression with its own lexical scope */
+mexpr : expr
+ { $$ = $1; intro_my(); }
+ ;
+
+mnexpr : nexpr
+ { $$ = $1; intro_my(); }
+ ;
+
+miexpr : iexpr
+ { $$ = $1; intro_my(); }
+ ;
+
+/* Optional "MAIN:"-style loop labels */
label : /* empty */
- { $$ = Nullch; }
+ {
+#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
- { $$ = 0; }
+ { $$ = $1; }
| subrout
- { $$ = 0; }
+ { $$ = $1; }
+ | mysubrout
+ { $$ = $1; }
| package
- { $$ = 0; }
+ { $$ = $1; }
| use
- { $$ = 0; }
+ { $$ = $1; }
+
+ /* these two are only used by MAD */
+
+ | peg
+ { $$ = $1; }
+ ;
+
+peg : PEG
+ { $$ = newOP(OP_NULL,0);
+ TOKEN_GETMAD($1,$$,'p');
+ }
+ ;
+
+format : FORMAT startformsub formname block
+ { 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);
+ $$ = (OP*)NULL;
+#endif
+ }
+ ;
+
+formname: WORD { $$ = $1; }
+ | /* NULL */ { $$ = (OP*)NULL; }
;
-format : FORMAT startsub WORD block
- { newFORM($2, $3, $4); }
- | FORMAT startsub block
- { newFORM($2, Nullop, $3); }
+/* Unimplemented "my sub foo { }" */
+mysubrout: MYSUB startsub subname proto subattrlist subbody
+ { SvREFCNT_inc_simple_void(PL_compcv);
+#ifdef MAD
+ $$ = 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 */
+ { $$ = start_subparse(FALSE, 0);
+ SAVEFREESV(PL_compcv); }
+
+ ;
+
+startanonsub: /* NULL */ /* start an anonymous subroutine scope */
+ { $$ = start_subparse(FALSE, CVf_ANON);
+ SAVEFREESV(PL_compcv); }
+ ;
+
+startformsub: /* NULL */ /* start a format subroutine scope */
+ { $$ = start_subparse(TRUE, 0);
+ SAVEFREESV(PL_compcv); }
;
-subrout : SUB startsub WORD proto block
- { newSUB($2, $3, $4, $5); }
- | SUB startsub WORD proto ';'
- { newSUB($2, $3, $4, Nullop); expect = XSTATE; }
+/* Name of a subroutine - must be a bareword, could be special */
+subname : WORD { const char *const name = SvPV_nolen_const(((SVOP*)$1)->op_sv);
+ if (strEQ(name, "BEGIN") || strEQ(name, "END")
+ || strEQ(name, "INIT") || strEQ(name, "CHECK")
+ || strEQ(name, "UNITCHECK"))
+ CvSPECIAL_on(PL_compcv);
+ $$ = $1; }
;
+/* Subroutine prototype */
proto : /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| THING
;
-
-startsub: /* NULL */ /* start a subroutine scope */
- { $$ = start_subparse(); }
+
+/* Optional list of subroutine attributes */
+subattrlist: /* NULL */
+ { $$ = (OP*)NULL; }
+ | COLONATTR THING
+ { $$ = $2;
+ TOKEN_GETMAD($1,$$,':');
+ }
+ | COLONATTR
+ { $$ = IF_MAD(
+ newOP(OP_NULL, 0),
+ (OP*)NULL
+ );
+ TOKEN_GETMAD($1,$$,':');
+ }
+ ;
+
+/* List of attributes for a "my" variable declaration */
+myattrlist: COLONATTR THING
+ { $$ = $2;
+ TOKEN_GETMAD($1,$$,':');
+ }
+ | 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,$$,';');
+ }
;
package : PACKAGE WORD ';'
- { package($2); }
- | PACKAGE ';'
- { package(Nullop); }
+ {
+#ifdef MAD
+ $$ = package($2);
+ token_getmad($1,$$,'o');
+ token_getmad($3,$$,';');
+#else
+ package($2);
+ $$ = (OP*)NULL;
+#endif
+ }
;
-use : USE startsub WORD WORD listexpr ';'
- { utilize($1, $2, $3, $4, $5); }
+use : USE startsub
+ { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ }
+ WORD WORD listexpr ';'
+ { SvREFCNT_inc_simple_void(PL_compcv);
+#ifdef MAD
+ $$ = 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_PV, "", 0), $$, 0);
+#else
+ utilize(IVAL($1), $2, $4, $5, $6);
+ $$ = (OP*)NULL;
+#endif
+ }
;
+/* Ordinary expressions; logical combinations */
expr : expr ANDOP expr
- { $$ = newLOGOP(OP_AND, 0, $1, $3); }
+ { $$ = newLOGOP(OP_AND, 0, $1, $3);
+ TOKEN_GETMAD($2,$$,'o');
+ }
| expr OROP expr
- { $$ = newLOGOP($2, 0, $1, $3); }
- | argexpr
+ { $$ = newLOGOP(IVAL($2), 0, $1, $3);
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | expr DOROP expr
+ { $$ = newLOGOP(OP_DOR, 0, $1, $3);
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | argexpr %prec PREC_LOW
;
+/* Expressions are a list of terms joined by commas */
argexpr : argexpr ','
- { $$ = $1; }
+ {
+#ifdef MAD
+ OP* op = newNULLLIST();
+ token_getmad($2,op,',');
+ $$ = append_elem(OP_LIST, $1, op);
+#else
+ $$ = $1;
+#endif
+ }
| argexpr ',' term
- { $$ = append_elem(OP_LIST, $1, $3); }
- | term
+ {
+ OP* term = $3;
+ DO_MAD(
+ term = newUNOP(OP_NULL, 0, term);
+ token_getmad($2,term,',');
+ )
+ $$ = append_elem(OP_LIST, $1, term);
+ }
+ | term %prec PREC_LOW
;
-listop : LSTOP indirob argexpr
- { $$ = convert($1, OPf_STACKED,
- prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); }
- | FUNC '(' indirob expr ')'
- { $$ = convert($1, OPf_STACKED,
- prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); }
- | term ARROW method '(' listexprcom ')'
+/* List operators */
+listop : LSTOP indirob argexpr /* map {...} @args or print $fh @args */
+ { $$ = convert(IVAL($1), OPf_STACKED,
+ 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) );
+ TOKEN_GETMAD($1,$$,'o');
+ TOKEN_GETMAD($2,$$,'(');
+ TOKEN_GETMAD($5,$$,')');
+ }
+ | term ARROW method '(' listexprcom ')' /* $foo->bar(list) */
{ $$ = convert(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST,
- prepend_elem(OP_LIST, $1, $5),
- newUNOP(OP_METHOD, 0, $3))); }
- | METHOD indirob listexpr
+ prepend_elem(OP_LIST, scalar($1), $5),
+ newUNOP(OP_METHOD, 0, $3)));
+ TOKEN_GETMAD($2,$$,'A');
+ TOKEN_GETMAD($4,$$,'(');
+ TOKEN_GETMAD($6,$$,')');
+ }
+ | term ARROW method /* $foo->bar */
+ { $$ = convert(OP_ENTERSUB, OPf_STACKED,
+ append_elem(OP_LIST, scalar($1),
+ newUNOP(OP_METHOD, 0, $3)));
+ TOKEN_GETMAD($2,$$,'A');
+ }
+ | METHOD indirob listexpr /* new Class @args */
{ $$ = convert(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST,
prepend_elem(OP_LIST, $2, $3),
- newUNOP(OP_METHOD, 0, $1))); }
- | FUNCMETH indirob '(' listexprcom ')'
+ newUNOP(OP_METHOD, 0, $1)));
+ }
+ | FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */
{ $$ = convert(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST,
prepend_elem(OP_LIST, $2, $4),
- newUNOP(OP_METHOD, 0, $1))); }
- | LSTOP listexpr
- { $$ = convert($1, 0, $2); }
- | FUNC '(' listexprcom ')'
- { $$ = convert($1, 0, $3); }
- | LSTOPSUB startsub block listexpr %prec LSTOP
+ newUNOP(OP_METHOD, 0, $1)));
+ TOKEN_GETMAD($3,$$,'(');
+ 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,$$,')');
+ }
+ | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */
+ { SvREFCNT_inc_simple_void(PL_compcv);
+ $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); }
+ listexpr %prec LSTOP /* ... @bar */
{ $$ = 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, $<opval>4, $5), $1));
+ }
;
+/* Names of methods. May use $object->$methodname */
method : METHOD
| scalar
;
-term : term ASSIGNOP term
- { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); }
- | term POWOP term
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term MULOP term
- { if ($2 != OP_REPEAT)
+/* Some kind of subscripted expression */
+subscripted: star '{' 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,$$,';');
+ TOKEN_GETMAD($5,$$,'}');
+ }
+ | 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();} */
+ { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3));
+ PL_parser->expect = XOPERATOR;
+ TOKEN_GETMAD($2,$$,'{');
+ 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,$$,'}');
+ }
+ | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */
+ { $$ = newBINOP(OP_HELEM, 0,
+ ref(newHVREF($1),OP_RV2HV),
+ jmaybe($3));
+ PL_parser->expect = XOPERATOR;
+ TOKEN_GETMAD($2,$$,'{');
+ TOKEN_GETMAD($4,$$,';');
+ TOKEN_GETMAD($5,$$,'}');
+ }
+ | term ARROW '(' ')' /* $subref->() */
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
+ newCVREF(0, scalar($1)));
+ TOKEN_GETMAD($2,$$,'a');
+ TOKEN_GETMAD($3,$$,'(');
+ TOKEN_GETMAD($4,$$,')');
+ }
+ | term ARROW '(' expr ')' /* $subref->(@args) */
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
+ append_elem(OP_LIST, $4,
+ newCVREF(0, scalar($1))));
+ TOKEN_GETMAD($2,$$,'a');
+ TOKEN_GETMAD($3,$$,'(');
+ TOKEN_GETMAD($5,$$,')');
+ }
+
+ | subscripted '(' expr ')' /* $foo->{bar}->(@args) */
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
+ append_elem(OP_LIST, $3,
+ newCVREF(0, scalar($1))));
+ TOKEN_GETMAD($2,$$,'(');
+ TOKEN_GETMAD($4,$$,')');
+ }
+ | subscripted '(' ')' /* $foo->{bar}->() */
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
+ newCVREF(0, scalar($1)));
+ TOKEN_GETMAD($2,$$,'(');
+ TOKEN_GETMAD($3,$$,')');
+ }
+ | '(' expr ')' '[' expr ']' /* list slice */
+ { $$ = newSLICEOP(0, $5, $2);
+ TOKEN_GETMAD($1,$$,'(');
+ TOKEN_GETMAD($3,$$,')');
+ TOKEN_GETMAD($4,$$,'[');
+ TOKEN_GETMAD($6,$$,']');
+ }
+ | '(' ')' '[' expr ']' /* empty list slice! */
+ { $$ = newSLICEOP(0, $4, (OP*)NULL);
+ TOKEN_GETMAD($1,$$,'(');
+ TOKEN_GETMAD($2,$$,')');
+ TOKEN_GETMAD($3,$$,'[');
+ TOKEN_GETMAD($5,$$,']');
+ }
+ ;
+
+/* Binary operators between terms */
+termbinop: term ASSIGNOP term /* $x = $y */
+ { $$ = newASSIGNOP(OPf_STACKED, $1, IVAL($2), $3);
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term POWOP term /* $x ** $y */
+ { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term MULOP term /* $x * $y, $x x $y */
+ { if (IVAL($2) != OP_REPEAT)
scalar($1);
- $$ = newBINOP($2, 0, $1, scalar($3)); }
- | term ADDOP term
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term SHIFTOP term
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term RELOP term
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term EQOP term
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term BITANDOP term
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term BITOROP term
- { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
- | term DOTDOT term
- { $$ = newRANGE($2, scalar($1), scalar($3));}
- | term ANDAND term
- { $$ = newLOGOP(OP_AND, 0, $1, $3); }
- | term OROR term
- { $$ = newLOGOP(OP_OR, 0, $1, $3); }
- | term '?' term ':' term
- { $$ = newCONDOP(0, $1, $3, $5); }
- | term MATCHOP term
- { $$ = bind_match($2, $1, $3); }
-
- | '-' term %prec UMINUS
- { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); }
- | '+' term %prec UMINUS
- { $$ = $2; }
- | '!' term
- { $$ = newUNOP(OP_NOT, 0, scalar($2)); }
- | '~' term
- { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));}
- | REFGEN term
- { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); }
- | term POSTINC
+ $$ = newBINOP(IVAL($2), 0, $1, scalar($3));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term ADDOP term /* $x + $y */
+ { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term SHIFTOP term /* $x >> $y, $x << $y */
+ { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term RELOP term /* $x > $y, etc. */
+ { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term EQOP term /* $x == $y, $x eq $y */
+ { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term BITANDOP term /* $x & $y */
+ { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term BITOROP term /* $x | $y */
+ { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | 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');
+ })
+ }
+ | term ANDAND term /* $x && $y */
+ { $$ = newLOGOP(OP_AND, 0, $1, $3);
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term OROR term /* $x || $y */
+ { $$ = newLOGOP(OP_OR, 0, $1, $3);
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term DORDOR term /* $x // $y */
+ { $$ = newLOGOP(OP_DOR, 0, $1, $3);
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term MATCHOP term /* $x =~ /$y/ */
+ { $$ = bind_match(IVAL($2), $1, $3);
+ TOKEN_GETMAD($2,
+ ($$->op_type == OP_NOT
+ ? ((UNOP*)$$)->op_first : $$),
+ '~');
+ }
+ ;
+
+/* Unary operators and terms */
+termunop : '-' term %prec UMINUS /* -$x */
+ { $$ = newUNOP(OP_NEGATE, 0, scalar($2));
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | '+' term %prec UMINUS /* +$x */
+ { $$ = IF_MAD(
+ newUNOP(OP_NULL, 0, $2),
+ $2
+ );
+ TOKEN_GETMAD($1,$$,'+');
+ }
+ | '!' term /* !$x */
+ { $$ = newUNOP(OP_NOT, 0, scalar($2));
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | '~' term /* ~$x */
+ { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | term POSTINC /* $x++ */
{ $$ = newUNOP(OP_POSTINC, 0,
- mod(scalar($1), OP_POSTINC)); }
- | term POSTDEC
+ mod(scalar($1), OP_POSTINC));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | term POSTDEC /* $x-- */
{ $$ = newUNOP(OP_POSTDEC, 0,
- mod(scalar($1), OP_POSTDEC)); }
- | PREINC term
+ mod(scalar($1), OP_POSTDEC));
+ TOKEN_GETMAD($2,$$,'o');
+ }
+ | PREINC term /* ++$x */
{ $$ = newUNOP(OP_PREINC, 0,
- mod(scalar($2), OP_PREINC)); }
- | PREDEC term
+ mod(scalar($2), OP_PREINC));
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | PREDEC term /* --$x */
{ $$ = newUNOP(OP_PREDEC, 0,
- mod(scalar($2), OP_PREDEC)); }
+ mod(scalar($2), OP_PREDEC));
+ TOKEN_GETMAD($1,$$,'o');
+ }
+
+ ;
+
+/* Constructors for anonymous data */
+anonymous: '[' expr ']'
+ { $$ = newANONLIST($2);
+ TOKEN_GETMAD($1,$$,'[');
+ TOKEN_GETMAD($3,$$,']');
+ }
+ | '[' ']'
+ { $$ = newANONLIST((OP*)NULL);
+ TOKEN_GETMAD($1,$$,'[');
+ TOKEN_GETMAD($2,$$,']');
+ }
+ | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */
+ { $$ = newANONHASH($2);
+ TOKEN_GETMAD($1,$$,'{');
+ TOKEN_GETMAD($3,$$,';');
+ TOKEN_GETMAD($4,$$,'}');
+ }
+ | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */
+ { $$ = newANONHASH((OP*)NULL);
+ TOKEN_GETMAD($1,$$,'{');
+ TOKEN_GETMAD($2,$$,';');
+ TOKEN_GETMAD($3,$$,'}');
+ }
+ | 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');
+ }
+
+ ;
+
+/* Things called with "do" */
+termdo : DO term %prec UNIOP /* do $filename */
+ { $$ = dofile($2, IVAL($1));
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | DO block %prec '(' /* do { code */
+ { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2));
+ TOKEN_GETMAD($1,$$,'D');
+ }
+ | DO WORD '(' ')' /* do somesub() */
+ { $$ = newUNOP(OP_ENTERSUB,
+ OPf_SPECIAL|OPf_STACKED,
+ prepend_elem(OP_LIST,
+ scalar(newCVREF(
+ (OPpENTERSUB_AMPER<<8),
+ scalar($2)
+ )),(OP*)NULL)); dep();
+ TOKEN_GETMAD($1,$$,'o');
+ TOKEN_GETMAD($3,$$,'(');
+ TOKEN_GETMAD($4,$$,')');
+ }
+ | DO WORD '(' expr ')' /* do somesub(@args) */
+ { $$ = newUNOP(OP_ENTERSUB,
+ OPf_SPECIAL|OPf_STACKED,
+ append_elem(OP_LIST,
+ $4,
+ scalar(newCVREF(
+ (OPpENTERSUB_AMPER<<8),
+ scalar($2)
+ )))); dep();
+ TOKEN_GETMAD($1,$$,'o');
+ TOKEN_GETMAD($3,$$,'(');
+ TOKEN_GETMAD($5,$$,')');
+ }
+ | DO scalar '(' ')' /* do $subref () */
+ { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
+ prepend_elem(OP_LIST,
+ scalar(newCVREF(0,scalar($2))), (OP*)NULL)); dep();
+ TOKEN_GETMAD($1,$$,'o');
+ TOKEN_GETMAD($3,$$,'(');
+ TOKEN_GETMAD($4,$$,')');
+ }
+ | DO scalar '(' expr ')' /* do $subref (@args) */
+ { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
+ prepend_elem(OP_LIST,
+ $4,
+ scalar(newCVREF(0,scalar($2))))); dep();
+ TOKEN_GETMAD($1,$$,'o');
+ TOKEN_GETMAD($3,$$,'(');
+ TOKEN_GETMAD($5,$$,')');
+ }
+
+ ;
+
+term : termbinop
+ | termunop
+ | anonymous
+ | termdo
+ | term '?' term ':' term
+ { $$ = newCONDOP(0, $1, $3, $5);
+ TOKEN_GETMAD($2,$$,'?');
+ TOKEN_GETMAD($4,$$,':');
+ }
+ | REFGEN term /* \$x, \@y, \%z */
+ { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN));
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | myattrterm %prec UNIOP
+ { $$ = $1; }
| LOCAL term %prec UNIOP
- { $$ = localize($2,$1); }
+ { $$ = localize($2,IVAL($1));
+ TOKEN_GETMAD($1,$$,'k');
+ }
| '(' expr ')'
- { $$ = sawparens($2); }
+ { $$ = sawparens(IF_MAD(newUNOP(OP_NULL,0,$2), $2));
+ TOKEN_GETMAD($1,$$,'(');
+ TOKEN_GETMAD($3,$$,')');
+ }
| '(' ')'
- { $$ = sawparens(newNULLLIST()); }
- | '[' expr ']' %prec '('
- { $$ = newANONLIST($2); }
- | '[' ']' %prec '('
- { $$ = newANONLIST(Nullop); }
- | HASHBRACK expr ';' '}' %prec '('
- { $$ = newANONHASH($2); }
- | HASHBRACK ';' '}' %prec '('
- { $$ = newANONHASH(Nullop); }
- | ANONSUB startsub proto block %prec '('
- { $$ = newANONSUB($2, $3, $4); }
+ { $$ = sawparens(newNULLLIST());
+ TOKEN_GETMAD($1,$$,'(');
+ TOKEN_GETMAD($2,$$,')');
+ }
| scalar %prec '('
{ $$ = $1; }
- | star '{' expr ';' '}'
- { $$ = newBINOP(OP_GELEM, 0, newGVREF(0,$1), $3); }
| star %prec '('
{ $$ = $1; }
- | scalar '[' expr ']' %prec '('
- { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); }
- | term ARROW '[' expr ']' %prec '('
- { $$ = newBINOP(OP_AELEM, 0,
- ref(newAVREF($1),OP_RV2AV),
- scalar($4));}
- | term '[' expr ']' %prec '('
- { assertref($1); $$ = newBINOP(OP_AELEM, 0,
- ref(newAVREF($1),OP_RV2AV),
- scalar($3));}
| hsh %prec '('
{ $$ = $1; }
| ary %prec '('
{ $$ = $1; }
- | arylen %prec '('
+ | arylen %prec '(' /* $#x, $#{ something } */
{ $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));}
- | scalar '{' expr ';' '}' %prec '('
- { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3));
- expect = XOPERATOR; }
- | term ARROW '{' expr ';' '}' %prec '('
- { $$ = newBINOP(OP_HELEM, 0,
- ref(newHVREF($1),OP_RV2HV),
- jmaybe($4));
- expect = XOPERATOR; }
- | term '{' expr ';' '}' %prec '('
- { assertref($1); $$ = newBINOP(OP_HELEM, 0,
- ref(newHVREF($1),OP_RV2HV),
- jmaybe($3));
- expect = XOPERATOR; }
- | '(' expr ')' '[' expr ']' %prec '('
- { $$ = newSLICEOP(0, $5, $2); }
- | '(' ')' '[' expr ']' %prec '('
- { $$ = newSLICEOP(0, $4, Nullop); }
- | ary '[' expr ']' %prec '('
+ | subscripted
+ { $$ = $1; }
+ | ary '[' expr ']' /* array slice */
{ $$ = prepend_elem(OP_ASLICE,
newOP(OP_PUSHMARK, 0),
newLISTOP(OP_ASLICE, 0,
list($3),
- ref($1, OP_ASLICE))); }
- | ary '{' expr ';' '}' %prec '('
+ ref($1, OP_ASLICE)));
+ TOKEN_GETMAD($2,$$,'[');
+ TOKEN_GETMAD($4,$$,']');
+ }
+ | ary '{' expr ';' '}' /* @hash{@keys} */
{ $$ = prepend_elem(OP_HSLICE,
newOP(OP_PUSHMARK, 0),
newLISTOP(OP_HSLICE, 0,
list($3),
ref(oopsHV($1), OP_HSLICE)));
- expect = XOPERATOR; }
+ PL_parser->expect = XOPERATOR;
+ TOKEN_GETMAD($2,$$,'{');
+ TOKEN_GETMAD($4,$$,';');
+ TOKEN_GETMAD($5,$$,'}');
+ }
| THING %prec '('
{ $$ = $1; }
- | amper
+ | amper /* &foo; */
{ $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); }
- | amper '(' ')'
- { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); }
- | amper '(' expr ')'
- { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- append_elem(OP_LIST, $3, scalar($1))); }
- | NOAMP WORD listexpr
+ | amper '(' ')' /* &foo() */
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1));
+ TOKEN_GETMAD($2,$$,'(');
+ TOKEN_GETMAD($3,$$,')');
+ }
+ | amper '(' expr ')' /* &foo(@args) */
+ {
+ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
+ append_elem(OP_LIST, $3, scalar($1)));
+ DO_MAD({
+ OP* op = $$;
+ if (op->op_type == OP_CONST) { /* defeat const fold */
+ op = (OP*)op->op_madprop->mad_val;
+ }
+ token_getmad($2,op,'(');
+ token_getmad($4,op,')');
+ })
+ }
+ | NOAMP WORD listexpr /* foo(@args) */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
- append_elem(OP_LIST, $3, scalar($2))); }
- | DO term %prec UNIOP
- { $$ = newUNOP(OP_DOFILE, 0, scalar($2)); }
- | DO block %prec '('
- { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); }
- | DO WORD '(' ')'
- { $$ = newUNOP(OP_ENTERSUB,
- OPf_SPECIAL|OPf_STACKED,
- prepend_elem(OP_LIST,
- scalar(newCVREF(
- (OPpENTERSUB_AMPER<<8),
- scalar($2)
- )),Nullop)); dep();}
- | DO WORD '(' expr ')'
- { $$ = newUNOP(OP_ENTERSUB,
- OPf_SPECIAL|OPf_STACKED,
- append_elem(OP_LIST,
- $4,
- scalar(newCVREF(
- (OPpENTERSUB_AMPER<<8),
- scalar($2)
- )))); dep();}
- | DO scalar '(' ')'
- { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
- prepend_elem(OP_LIST,
- scalar(newCVREF(0,scalar($2))), Nullop)); dep();}
- | DO scalar '(' expr ')'
- { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
- prepend_elem(OP_LIST,
- $4,
- scalar(newCVREF(0,scalar($2))))); dep();}
- | LOOPEX
- { $$ = newOP($1, OPf_SPECIAL);
- hints |= HINT_BLOCK_SCOPE; }
+ append_elem(OP_LIST, $3, scalar($2)));
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | LOOPEX /* loop exiting command (goto, last, dump, etc) */
+ { $$ = newOP(IVAL($1), OPf_SPECIAL);
+ PL_hints |= HINT_BLOCK_SCOPE;
+ TOKEN_GETMAD($1,$$,'o');
+ }
| LOOPEX term
- { $$ = newLOOPEX($1,$2); }
- | NOTOP argexpr
- { $$ = newUNOP(OP_NOT, 0, scalar($2)); }
- | UNIOP
- { $$ = newOP($1, 0); }
- | UNIOP block
- { $$ = newUNOP($1, 0, $2); }
- | UNIOP term
- { $$ = newUNOP($1, 0, $2); }
- | UNIOPSUB term
+ { $$ = newLOOPEX(IVAL($1),$2);
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | NOTOP argexpr /* not $foo */
+ { $$ = newUNOP(OP_NOT, 0, scalar($2));
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | UNIOP /* Unary op, $_ implied */
+ { $$ = newOP(IVAL($1), 0);
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | UNIOP block /* eval { foo }* */
+ { $$ = newUNOP(IVAL($1), 0, $2);
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | UNIOP term /* Unary op */
+ { $$ = newUNOP(IVAL($1), 0, $2);
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | REQUIRE /* require, $_ implied */
+ { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0);
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | REQUIRE term /* require Foo */
+ { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2);
+ TOKEN_GETMAD($1,$$,'o');
+ }
+ | UNIOPSUB
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); }
+ | UNIOPSUB term /* Sub treated as unop */
{ $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST, $2, scalar($1))); }
- | FUNC0
- { $$ = newOP($1, 0); }
+ | FUNC0 /* Nullary operator */
+ { $$ = newOP(IVAL($1), 0);
+ TOKEN_GETMAD($1,$$,'o');
+ }
| FUNC0 '(' ')'
- { $$ = newOP($1, 0); }
- | FUNC0SUB
- { $$ = newUNOP(OP_ENTERSUB, 0,
+ { $$ = newOP(IVAL($1), 0);
+ TOKEN_GETMAD($1,$$,'o');
+ TOKEN_GETMAD($2,$$,'(');
+ TOKEN_GETMAD($3,$$,')');
+ }
+ | FUNC0SUB /* Sub treated as nullop */
+ { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
scalar($1)); }
- | FUNC1 '(' ')'
- { $$ = newOP($1, OPf_SPECIAL); }
- | FUNC1 '(' expr ')'
- { $$ = newUNOP($1, 0, $3); }
- | PMFUNC '(' term ')'
- { $$ = pmruntime($1, $3, Nullop); }
- | PMFUNC '(' term ',' term ')'
- { $$ = pmruntime($1, $3, $5); }
+ | FUNC1 '(' ')' /* not () */
+ { $$ = (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,$$,')');
+ }
+ | FUNC1 '(' expr ')' /* not($foo) */
+ { $$ = 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,$$,'(');
+ TOKEN_GETMAD($4,$$,')');
+ }
| WORD
| listop
+ | YADAYADA
+ {
+ $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0),
+ newSVOP(OP_CONST, 0, newSVpvs("Unimplemented")));
+ }
+ ;
+
+/* "my" declarations, with optional attributes */
+myattrterm: MY myterm myattrlist
+ { $$ = my_attrs($2,$3);
+ DO_MAD(
+ token_getmad($1,$$,'d');
+ append_madprops($3->op_madprop, $$, 'a');
+ $3->op_madprop = 0;
+ )
+ }
+ | MY myterm
+ { $$ = localize($2,IVAL($1));
+ TOKEN_GETMAD($1,$$,'d');
+ }
+ ;
+
+/* Things that can be "my"'d */
+myterm : '(' expr ')'
+ { $$ = sawparens($2);
+ TOKEN_GETMAD($1,$$,'(');
+ TOKEN_GETMAD($3,$$,')');
+ }
+ | '(' ')'
+ { $$ = sawparens(newNULLLIST());
+ TOKEN_GETMAD($1,$$,'(');
+ TOKEN_GETMAD($2,$$,')');
+ }
+ | scalar %prec '('
+ { $$ = $1; }
+ | hsh %prec '('
+ { $$ = $1; }
+ | ary %prec '('
+ { $$ = $1; }
;
-listexpr: /* NULL */
- { $$ = Nullop; }
- | argexpr
+/* Basic list expressions */
+listexpr: /* NULL */ %prec PREC_LOW
+ { $$ = (OP*)NULL; }
+ | argexpr %prec PREC_LOW
{ $$ = $1; }
;
listexprcom: /* NULL */
- { $$ = Nullop; }
+ { $$ = (OP*)NULL; }
| expr
{ $$ = $1; }
| expr ','
- { $$ = $1; }
+ {
+#ifdef MAD
+ OP* op = newNULLLIST();
+ token_getmad($2,op,',');
+ $$ = append_elem(OP_LIST, $1, op);
+#else
+ $$ = $1;
+#endif
+
+ }
+ ;
+
+/* A little bit of trickery to make "for my $foo (@bar)" actually be
+ lexical */
+my_scalar: scalar
+ { PL_parser->in_my = 0; $$ = my($1); }
;
amper : '&' indirob
- { $$ = newCVREF($1,$2); }
+ { $$ = newCVREF(IVAL($1),$2);
+ TOKEN_GETMAD($1,$$,'&');
+ }
;
scalar : '$' indirob
- { $$ = newSVREF($2); }
+ { $$ = newSVREF($2);
+ TOKEN_GETMAD($1,$$,'$');
+ }
;
ary : '@' indirob
- { $$ = newAVREF($2); }
+ { $$ = newAVREF($2);
+ TOKEN_GETMAD($1,$$,'@');
+ }
;
hsh : '%' indirob
- { $$ = newHVREF($2); }
+ { $$ = newHVREF($2);
+ TOKEN_GETMAD($1,$$,'%');
+ }
;
arylen : DOLSHARP indirob
- { $$ = newAVREF($2); }
+ { $$ = newAVREF($2);
+ TOKEN_GETMAD($1,$$,'l');
+ }
;
star : '*' indirob
- { $$ = newGVREF(0,$2); }
+ { $$ = newGVREF(0,$2);
+ TOKEN_GETMAD($1,$$,'*');
+ }
;
+/* Indirect objects */
indirob : WORD
{ $$ = scalar($1); }
- | scalar
- { $$ = scalar($1); }
+ | scalar %prec PREC_LOW
+ { $$ = scalar($1); }
| block
{ $$ = scope($1); }
| PRIVATEREF
{ $$ = $1; }
;
-
-%% /* PROGRAM */