This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
The docs for SvRX and SvRXOK still refered to magic and the code snippet
[perl5.git] / perly.y
diff --git a/perly.y b/perly.y
index 29fb93a..bf51922 100644 (file)
--- a/perly.y
+++ b/perly.y
@@ -69,7 +69,7 @@
 #endif
 }
 
-%token <ival> GRAMPROG GRAMBLOCK GRAMFULLSTMT GRAMSTMTSEQ
+%token <ival> GRAMPROG GRAMBLOCK GRAMBARESTMT GRAMFULLSTMT GRAMSTMTSEQ
 
 %token <i_tkval> '{' '}' '[' ']' '-' '+' '$' '@' '%' '*' '&' ';'
 
@@ -89,7 +89,7 @@
 
 %type <i_tkval> lpar_or_qw
 
-%type <ival> grammar prog progstart remember mremember
+%type <ival> grammar remember mremember
 %type <ival>  startsub startanonsub startformsub
 /* FIXME for MAD - are these two ival? */
 %type <ival> mydefsv mintro
 %% /* RULES */
 
 /* Top-level choice of what kind of thing yyparse was called to parse */
-grammar        :       GRAMPROG prog
-                       { $$ = $2; }
+grammar        :       GRAMPROG
+                       {
+                         PL_parser->expect = XSTATE;
+                       }
+               remember stmtseq
+                       {
+                         newPROG(block_end($3,$4));
+                         $$ = 0;
+                       }
        |       GRAMBLOCK
                        {
                          parser->expect = XBLOCK;
@@ -153,6 +160,18 @@ grammar    :       GRAMPROG prog
                          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;
@@ -176,12 +195,6 @@ grammar    :       GRAMPROG prog
                        }
        ;
 
-/* The whole program */
-prog   :       progstart
-       /*CONTINUED*/   stmtseq
-                       { $$ = $1; newPROG(block_end($1,$2)); }
-       ;
-
 /* An ordinary block */
 block  :       '{' remember stmtseq '}'
                        { if (PL_parser->copline > (line_t)IVAL($1))
@@ -200,13 +213,6 @@ mydefsv:   /* NULL */      /* lexicalize $_ */
                        { $$ = (I32) Perl_allocmy(aTHX_ STR_WITH_LEN("$_"), 0); }
        ;
 
-progstart:
-               {
-                   PL_parser->expect = XSTATE; $$ = block_start(TRUE);
-               }
-       ;
-
-
 mblock :       '{' mremember stmtseq '}'
                        { if (PL_parser->copline > (line_t)IVAL($1))
                              PL_parser->copline = (line_t)IVAL($1);
@@ -337,7 +343,8 @@ barestmt:   PLUGSTMT
                        }
        |       IF lpar_or_qw remember mexpr ')' mblock else
                        {
-                         $$ = block_end($3, newCONDOP(0, $4, scope($6), $7));
+                         $$ = block_end($3,
+                             newCONDOP(0, $4, op_scope($6), $7));
                          TOKEN_GETMAD($1,$$,'I');
                          TOKEN_GETMAD($2,$$,'(');
                          TOKEN_GETMAD($5,$$,')');
@@ -345,7 +352,8 @@ barestmt:   PLUGSTMT
                        }
        |       UNLESS lpar_or_qw remember miexpr ')' mblock else
                        {
-                         $$ = block_end($3, newCONDOP(0, $4, scope($6), $7));
+                         $$ = block_end($3,
+                             newCONDOP(0, $4, op_scope($6), $7));
                          TOKEN_GETMAD($1,$$,'I');
                          TOKEN_GETMAD($2,$$,'(');
                          TOKEN_GETMAD($5,$$,')');
@@ -354,18 +362,18 @@ barestmt: PLUGSTMT
        |       GIVEN lpar_or_qw remember mydefsv mexpr ')' mblock
                        {
                          $$ = block_end($3,
-                                 newGIVENOP($5, scope($7), (PADOFFSET)$4));
+                                 newGIVENOP($5, op_scope($7), (PADOFFSET)$4));
                          PL_parser->copline = (line_t)IVAL($1);
                        }
        |       WHEN lpar_or_qw remember mexpr ')' mblock
-                       { $$ = block_end($3, newWHENOP($4, scope($6))); }
+                       { $$ = block_end($3, newWHENOP($4, op_scope($6))); }
        |       DEFAULT block
-                       { $$ = newWHENOP(0, scope($2)); }
+                       { $$ = newWHENOP(0, op_scope($2)); }
        |       WHILE lpar_or_qw remember texpr ')' mintro mblock cont
                        {
                          $$ = block_end($3,
                                  newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
-                                     IVAL($1), $4, $7, $8, $6));
+                                     $4, $7, $8, $6));
                          TOKEN_GETMAD($1,$$,'W');
                          TOKEN_GETMAD($2,$$,'(');
                          TOKEN_GETMAD($5,$$,')');
@@ -374,8 +382,8 @@ barestmt:   PLUGSTMT
        |       UNTIL lpar_or_qw remember iexpr ')' mintro mblock cont
                        {
                          $$ = block_end($3,
-                                 newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
-                                     IVAL($1), $4, $7, $8, $6));
+                                 newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
+                                     $4, $7, $8, $6));
                          TOKEN_GETMAD($1,$$,'W');
                          TOKEN_GETMAD($2,$$,'(');
                          TOKEN_GETMAD($5,$$,')');
@@ -386,7 +394,7 @@ barestmt:   PLUGSTMT
                        {
                          OP *initop = IF_MAD($4 ? $4 : newOP(OP_NULL, 0), $4);
                          OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
-                                     IVAL($1), scalar($6), $11, $9, $8);
+                                     scalar($6), $11, $9, $8);
                          if (initop) {
                              forop = op_prepend_elem(OP_LINESEQ, initop,
                                  op_append_elem(OP_LINESEQ,
@@ -404,9 +412,7 @@ barestmt:   PLUGSTMT
                        }
        |       FOR MY remember my_scalar lpar_or_qw mexpr ')' mblock cont
                        {
-                         $$ = block_end($3,
-                                 newFOROP(0, (line_t)IVAL($1),
-                                     $4, $6, $8, $9));
+                         $$ = block_end($3, newFOROP(0, $4, $6, $8, $9));
                          TOKEN_GETMAD($1,$$,'W');
                          TOKEN_GETMAD($2,$$,'d');
                          TOKEN_GETMAD($5,$$,'(');
@@ -415,9 +421,8 @@ barestmt:   PLUGSTMT
                        }
        |       FOR scalar lpar_or_qw remember mexpr ')' mblock cont
                        {
-                         $$ = block_end($4,
-                                 newFOROP(0, (line_t)IVAL($1),
-                                     mod($2, OP_ENTERLOOP), $5, $7, $8));
+                         $$ = block_end($4, newFOROP(0,
+                                     op_lvalue($2, OP_ENTERLOOP), $5, $7, $8));
                          TOKEN_GETMAD($1,$$,'W');
                          TOKEN_GETMAD($3,$$,'(');
                          TOKEN_GETMAD($6,$$,')');
@@ -426,8 +431,7 @@ barestmt:   PLUGSTMT
        |       FOR lpar_or_qw remember mexpr ')' mblock cont
                        {
                          $$ = block_end($3,
-                                 newFOROP(0, (line_t)IVAL($1),
-                                     (OP*)NULL, $4, $6, $7));
+                                 newFOROP(0, (OP*)NULL, $4, $6, $7));
                          TOKEN_GETMAD($1,$$,'W');
                          TOKEN_GETMAD($2,$$,'(');
                          TOKEN_GETMAD($5,$$,')');
@@ -437,7 +441,7 @@ barestmt:   PLUGSTMT
                        {
                          /* a block is a loop that happens once */
                          $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
-                                 NOLINE, (OP*)NULL, $1, $2, 0);
+                                 (OP*)NULL, $1, $2, 0);
                        }
        |       PACKAGE WORD WORD '{' remember
                        {
@@ -455,7 +459,7 @@ barestmt:   PLUGSTMT
                stmtseq '}'
                        {
                          /* a block is a loop that happens once */
-                         $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, NOLINE,
+                         $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
                                  (OP*)NULL, block_end($5, $7), (OP*)NULL, 0);
                          op_free($3);
                          if ($2)
@@ -502,25 +506,29 @@ sideff    :       error
                          TOKEN_GETMAD($2,$$,'w');
                        }
        |       expr FOR expr
-                       { $$ = newFOROP(0, (line_t)IVAL($2),
-                                       (OP*)NULL, $3, $1, (OP*)NULL);
+                       { $$ = 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 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,$$,')');
@@ -531,7 +539,8 @@ else        :       /* NULL */
 cont   :       /* NULL */
                        { $$ = (OP*)NULL; }
        |       CONTINUE block
-                       { $$ = scope($2);
+                       {
+                         $$ = op_scope($2);
                          TOKEN_GETMAD($1,$$,'o');
                        }
        ;
@@ -970,22 +979,22 @@ termunop : '-' term %prec UMINUS                       /* -$x */
                        }
        |       term POSTINC                           /* $x++ */
                        { $$ = 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');
                        }
 
@@ -1030,7 +1039,7 @@ 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 lpar_or_qw ')'                  /* do somesub() */
@@ -1088,7 +1097,7 @@ 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
@@ -1353,7 +1362,7 @@ indirob   :       WORD
        |       scalar %prec PREC_LOW
                        { $$ = scalar($1); }
        |       block
-                       { $$ = scope($1); }
+                       { $$ = op_scope($1); }
 
        |       PRIVATEREF
                        { $$ = $1; }