Fix contrib/cube and contrib/seg to build with bison 3.0.

These modules used the YYPARSE_PARAM macro, which has been deprecated
by the bison folk since 1.875, and which they finally removed in 3.0.
Adjust the code to use the replacement facility, %parse-param, which
is a much better solution anyway since it allows specification of the
type of the extra parser parameter.  We can thus get rid of a lot of
unsightly casting.

Back-patch to all active branches, since somebody might try to build
a back branch with up-to-date tools.

contrib/cube/cube.c

@@ -27,8 +27,8 @@ PG_MODULE_MAGIC;
 #define ARRPTR(x)  ( (double *) ARR_DATA_PTR(x) )
 #define ARRNELEMS(x)  ArrayGetNItems( ARR_NDIM(x), ARR_DIMS(x))
 
-extern int	cube_yyparse();
+extern int	cube_yyparse(NDBOX **result);
-extern void cube_yyerror(const char *message);
+extern void cube_yyerror(NDBOX **result, const char *message);
 extern void cube_scanner_init(const char *str);
 extern void cube_scanner_finish(void);
 
@@ -159,12 +159,12 @@ Datum
 cube_in(PG_FUNCTION_ARGS)
 {
 	char	   *str = PG_GETARG_CSTRING(0);
-	void	   *result;
+	NDBOX	   *result;
 
 	cube_scanner_init(str);
 
 	if (cube_yyparse(&result) != 0)
-		cube_yyerror("bogus input");
+		cube_yyerror(&result, "bogus input");
 
 	cube_scanner_finish();
 

contrib/cube/cubeparse.y

@@ -1,10 +1,9 @@
 %{
+/* contrib/cube/cubeparse.y */
+
 /* NdBox = [(lowerleft),(upperright)] */
 /* [(xLL(1)...xLL(N)),(xUR(1)...xUR(n))] */
 
-/* contrib/cube/cubeparse.y */
-
-#define YYPARSE_PARAM result  /* need this to pass a pointer (void *) to yyparse */
 #define YYSTYPE char *
 #define YYDEBUG 1
 
@@ -28,8 +27,8 @@ extern int cube_yylex(void);
 static char *scanbuf;
 static int	scanbuflen;
 
-void cube_yyerror(const char *message);
+extern int	cube_yyparse(NDBOX **result);
-int cube_yyparse(void *result);
+extern void cube_yyerror(NDBOX **result, const char *message);
 
 static int delim_count(char *s, char delim);
 static NDBOX * write_box(unsigned int dim, char *str1, char *str2);
@@ -38,6 +37,7 @@ static NDBOX * write_point_as_box(char *s, int dim);
 %}
 
 /* BISON Declarations */
+%parse-param {NDBOX **result}
 %expect 0
 %name-prefix="cube_yy"
 
@@ -70,7 +70,7 @@ box:
               YYABORT;
             }
 
-	    *((void **)result) = write_box( dim, $2, $4 );
+	    *result = write_box( dim, $2, $4 );
 
           }
       |
@@ -96,7 +96,7 @@ box:
               YYABORT;
             }
 
-	    *((void **)result) = write_box( dim, $1, $3 );
+	    *result = write_box( dim, $1, $3 );
           }
       |
 
@@ -113,7 +113,7 @@ box:
               YYABORT;
             }
 
-	    *((void **)result) = write_point_as_box($1, dim);
+	    *result = write_point_as_box($1, dim);
           }
 
       |
@@ -130,7 +130,7 @@ box:
                                  CUBE_MAX_DIM)));
               YYABORT;
             }
-	    *((void **)result) = write_point_as_box($1, dim);
+	    *result = write_point_as_box($1, dim);
           }
       ;
 

contrib/cube/cubescan.l

@@ -54,7 +54,7 @@ float        ({integer}|{real})([eE]{integer})?
 %%
 
 void
-yyerror(const char *message)
+yyerror(NDBOX **result, const char *message)
 {
 	if (*yytext == YY_END_OF_BUFFER_CHAR)
 	{

contrib/seg/seg.c

@@ -24,8 +24,8 @@
 
 PG_MODULE_MAGIC;
 
-extern int	seg_yyparse();
+extern int	seg_yyparse(SEG *result);
-extern void seg_yyerror(const char *message);
+extern void seg_yyerror(SEG *result, const char *message);
 extern void seg_scanner_init(const char *str);
 extern void seg_scanner_finish(void);
 
@@ -127,7 +127,7 @@ seg_in(PG_FUNCTION_ARGS)
 	seg_scanner_init(str);
 
 	if (seg_yyparse(result) != 0)
-		seg_yyerror("bogus input");
+		seg_yyerror(result, "bogus input");
 
 	seg_scanner_finish();
 

contrib/seg/segparse.y

@@ -1,5 +1,5 @@
 %{
-#define YYPARSE_PARAM result  /* need this to pass a pointer (void *) to yyparse */
+/* contrib/seg/segparse.y */
 
 #include "postgres.h"
 
@@ -24,8 +24,8 @@
 
   extern int significant_digits(char *str);		/* defined in seg.c */
 
-  void seg_yyerror(const char *message);
+  extern int	seg_yyparse(SEG *result);
-  int seg_yyparse(void *result);
+  extern void seg_yyerror(SEG *result, const char *message);
 
   static float seg_atof(char *value);
 
@@ -40,6 +40,7 @@
 %}
 
 /* BISON Declarations */
+%parse-param {SEG *result}
 %expect 0
 %name-prefix="seg_yy"
 
@@ -65,55 +66,55 @@
 
 range:
           boundary PLUMIN deviation {
-	    ((SEG *)result)->lower = $1.val - $3.val;
+	    result->lower = $1.val - $3.val;
-	    ((SEG *)result)->upper = $1.val + $3.val;
+	    result->upper = $1.val + $3.val;
-	    sprintf(strbuf, "%g", ((SEG *)result)->lower);
+	    sprintf(strbuf, "%g", result->lower);
-	    ((SEG *)result)->l_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
+	    result->l_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
-	    sprintf(strbuf, "%g", ((SEG *)result)->upper);
+	    sprintf(strbuf, "%g", result->upper);
-	    ((SEG *)result)->u_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
+	    result->u_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
-	    ((SEG *)result)->l_ext = '\0';
+	    result->l_ext = '\0';
-	    ((SEG *)result)->u_ext = '\0';
+	    result->u_ext = '\0';
           }
       |
           boundary RANGE boundary {
-	    ((SEG *)result)->lower = $1.val;
+	    result->lower = $1.val;
-	    ((SEG *)result)->upper = $3.val;
+	    result->upper = $3.val;
-	    if ( ((SEG *)result)->lower > ((SEG *)result)->upper ) {
+	    if ( result->lower > result->upper ) {
 	      ereport(ERROR,
 				  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 				   errmsg("swapped boundaries: %g is greater than %g",
-						  ((SEG *)result)->lower, ((SEG *)result)->upper)));
+						  result->lower, result->upper)));
 
 	      YYERROR;
 	    }
-	    ((SEG *)result)->l_sigd = $1.sigd;
+	    result->l_sigd = $1.sigd;
-	    ((SEG *)result)->u_sigd = $3.sigd;
+	    result->u_sigd = $3.sigd;
-	    ((SEG *)result)->l_ext = ( $1.ext ? $1.ext : '\0' );
+	    result->l_ext = ( $1.ext ? $1.ext : '\0' );
-	    ((SEG *)result)->u_ext = ( $3.ext ? $3.ext : '\0' );
+	    result->u_ext = ( $3.ext ? $3.ext : '\0' );
           }
       |
           boundary RANGE {
-	    ((SEG *)result)->lower = $1.val;
+	    result->lower = $1.val;
-	    ((SEG *)result)->upper = HUGE_VAL;
+	    result->upper = HUGE_VAL;
-	    ((SEG *)result)->l_sigd = $1.sigd;
+	    result->l_sigd = $1.sigd;
-	    ((SEG *)result)->u_sigd = 0;
+	    result->u_sigd = 0;
-	    ((SEG *)result)->l_ext = ( $1.ext ? $1.ext : '\0' );
+	    result->l_ext = ( $1.ext ? $1.ext : '\0' );
-	    ((SEG *)result)->u_ext = '-';
+	    result->u_ext = '-';
           }
       |
           RANGE boundary {
-	    ((SEG *)result)->lower = -HUGE_VAL;
+	    result->lower = -HUGE_VAL;
-	    ((SEG *)result)->upper = $2.val;
+	    result->upper = $2.val;
-	    ((SEG *)result)->l_sigd = 0;
+	    result->l_sigd = 0;
-	    ((SEG *)result)->u_sigd = $2.sigd;
+	    result->u_sigd = $2.sigd;
-	    ((SEG *)result)->l_ext = '-';
+	    result->l_ext = '-';
-	    ((SEG *)result)->u_ext = ( $2.ext ? $2.ext : '\0' );
+	    result->u_ext = ( $2.ext ? $2.ext : '\0' );
           }
       |
           boundary {
-	    ((SEG *)result)->lower = ((SEG *)result)->upper = $1.val;
+	    result->lower = result->upper = $1.val;
-	    ((SEG *)result)->l_sigd = ((SEG *)result)->u_sigd = $1.sigd;
+	    result->l_sigd = result->u_sigd = $1.sigd;
-	    ((SEG *)result)->l_ext = ((SEG *)result)->u_ext = ( $1.ext ? $1.ext : '\0' );
+	    result->l_ext = result->u_ext = ( $1.ext ? $1.ext : '\0' );
           }
       ;
 

contrib/seg/segscan.l

@@ -53,7 +53,7 @@ float        ({integer}|{real})([eE]{integer})?
 %%
 
 void
-yyerror(const char *message)
+yyerror(SEG *result, const char *message)
 {
 	if (*yytext == YY_END_OF_BUFFER_CHAR)
 	{