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

@@ -26,8 +26,8 @@ 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 void cube_yyerror(const char *message);
+extern int	cube_yyparse(NDBOX **result);
+extern void cube_yyerror(NDBOX **result, const char *message);
 extern void cube_scanner_init(const char *str);
 extern void cube_scanner_finish(void);
 
@@ -156,12 +156,12 @@ 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

 %{
+/* 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);
-int cube_yyparse(void *result);
+extern int	cube_yyparse(NDBOX **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: O_BRACKET paren_list COMMA paren_list C_BRACKET
 			YYABORT;
 		}
 
-		*((void **)result) = write_box( dim, $2, $4 );
+		*result = write_box( dim, $2, $4 );
 
 	}
 
@@ -97,7 +97,7 @@ box: O_BRACKET paren_list COMMA paren_list C_BRACKET
 			YYABORT;
 		}
 
-		*((void **)result) = write_box( dim, $1, $3 );
+		*result = write_box( dim, $1, $3 );
 	}
 
 	| paren_list
@@ -114,7 +114,7 @@ box: O_BRACKET paren_list COMMA paren_list C_BRACKET
 			YYABORT;
 		}
 
-		*((void **)result) = write_point_as_box($1, dim);
+		*result = write_point_as_box($1, dim);
 	}
 
 	| list
@@ -130,7 +130,7 @@ box: O_BRACKET paren_list COMMA paren_list C_BRACKET
 							   CUBE_MAX_DIM)));
 			YYABORT;
 		}
-		*((void **)result) = write_point_as_box($1, dim);
+		*result = write_point_as_box($1, dim);
 	}
 	;
 

contrib/cube/cubescan.l

@@ -61,7 +61,7 @@ float        ({integer}|{real})([eE]{integer})?
 %%
 
 void __attribute__((noreturn))
-yyerror(const char *message)
+yyerror(NDBOX **result, const char *message)
 {
 	if (*yytext == YY_END_OF_BUFFER_CHAR)
 	{

contrib/seg/seg.c

@@ -23,8 +23,8 @@
 
 PG_MODULE_MAGIC;
 
-extern int	seg_yyparse();
-extern void seg_yyerror(const char *message);
+extern int	seg_yyparse(SEG *result);
+extern void seg_yyerror(SEG *result, const char *message);
 extern void seg_scanner_init(const char *str);
 extern void seg_scanner_finish(void);
 
@@ -126,7 +126,7 @@ 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

 %{
-#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 seg_yylex(void);
 
 extern int significant_digits(char *str);		/* defined in seg.c */
 
-void seg_yyerror(const char *message);
-int seg_yyparse(void *result);
+extern int	seg_yyparse(SEG *result);
+extern void seg_yyerror(SEG *result, const char *message);
 
 static float seg_atof(char *value);
 
@@ -40,6 +40,7 @@ static char strbuf[25] = {
 %}
 
 /* BISON Declarations */
+%parse-param {SEG *result}
 %expect 0
 %name-prefix="seg_yy"
 
@@ -65,59 +66,59 @@ static char strbuf[25] = {
 
 range: boundary PLUMIN deviation
 	{
-		((SEG *)result)->lower = $1.val - $3.val;
-		((SEG *)result)->upper = $1.val + $3.val;
-		sprintf(strbuf, "%g", ((SEG *)result)->lower);
-		((SEG *)result)->l_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
-		sprintf(strbuf, "%g", ((SEG *)result)->upper);
-		((SEG *)result)->u_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
-		((SEG *)result)->l_ext = '\0';
-		((SEG *)result)->u_ext = '\0';
+		result->lower = $1.val - $3.val;
+		result->upper = $1.val + $3.val;
+		sprintf(strbuf, "%g", result->lower);
+		result->l_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
+		sprintf(strbuf, "%g", result->upper);
+		result->u_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
+		result->l_ext = '\0';
+		result->u_ext = '\0';
 	}
 
 	| boundary RANGE boundary
 	{
-		((SEG *)result)->lower = $1.val;
-		((SEG *)result)->upper = $3.val;
-		if ( ((SEG *)result)->lower > ((SEG *)result)->upper ) {
+		result->lower = $1.val;
+		result->upper = $3.val;
+		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;
-		((SEG *)result)->u_sigd = $3.sigd;
-		((SEG *)result)->l_ext = ( $1.ext ? $1.ext : '\0' );
-		((SEG *)result)->u_ext = ( $3.ext ? $3.ext : '\0' );
+		result->l_sigd = $1.sigd;
+		result->u_sigd = $3.sigd;
+		result->l_ext = ( $1.ext ? $1.ext : '\0' );
+		result->u_ext = ( $3.ext ? $3.ext : '\0' );
 	}
 
 	| boundary RANGE
 	{
-		((SEG *)result)->lower = $1.val;
-		((SEG *)result)->upper = HUGE_VAL;
-		((SEG *)result)->l_sigd = $1.sigd;
-		((SEG *)result)->u_sigd = 0;
-		((SEG *)result)->l_ext = ( $1.ext ? $1.ext : '\0' );
-		((SEG *)result)->u_ext = '-';
+		result->lower = $1.val;
+		result->upper = HUGE_VAL;
+		result->l_sigd = $1.sigd;
+		result->u_sigd = 0;
+		result->l_ext = ( $1.ext ? $1.ext : '\0' );
+		result->u_ext = '-';
 	}
 
 	| RANGE boundary
 	{
-		((SEG *)result)->lower = -HUGE_VAL;
-		((SEG *)result)->upper = $2.val;
-		((SEG *)result)->l_sigd = 0;
-		((SEG *)result)->u_sigd = $2.sigd;
-		((SEG *)result)->l_ext = '-';
-		((SEG *)result)->u_ext = ( $2.ext ? $2.ext : '\0' );
+		result->lower = -HUGE_VAL;
+		result->upper = $2.val;
+		result->l_sigd = 0;
+		result->u_sigd = $2.sigd;
+		result->l_ext = '-';
+		result->u_ext = ( $2.ext ? $2.ext : '\0' );
 	}
 
 	| boundary
 	{
-		((SEG *)result)->lower = ((SEG *)result)->upper = $1.val;
-		((SEG *)result)->l_sigd = ((SEG *)result)->u_sigd = $1.sigd;
-		((SEG *)result)->l_ext = ((SEG *)result)->u_ext = ( $1.ext ? $1.ext : '\0' );
+		result->lower = result->upper = $1.val;
+		result->l_sigd = result->u_sigd = $1.sigd;
+		result->l_ext = result->u_ext = ( $1.ext ? $1.ext : '\0' );
 	}
 	;
 

contrib/seg/segscan.l

@@ -60,7 +60,7 @@ float        ({integer}|{real})([eE]{integer})?
 %%
 
 void __attribute__((noreturn))
-yyerror(const char *message)
+yyerror(SEG *result, const char *message)
 {
 	if (*yytext == YY_END_OF_BUFFER_CHAR)
 	{