Move some declarations in the raw-parser header files to create a clearer

distinction between the external API (parser.h) and declarations that only
need to be visible within the raw parser code (gramparse.h, which now is only
included by parser.c, gram.y, scan.l, and keywords.c).  This is in preparation
for the upcoming change to a reentrant lexer, which will require referencing
YYSTYPE in the declarations of base_yylex and filtered_base_yylex, hence
gram.h will have to be included by gramparse.h.  We don't want any more files
than absolutely necessary to depend on gram.h, so some cleanup is called for.

src/backend/commands/proclang.c

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/proclang.c,v 1.85 2009/06/11 14:48:56 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/proclang.c,v 1.86 2009/07/12 17:12:33 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -28,8 +28,8 @@
 #include "commands/defrem.h"
 #include "commands/proclang.h"
 #include "miscadmin.h"
-#include "parser/gramparse.h"
 #include "parser/parse_func.h"
+#include "parser/parser.h"
 #include "utils/acl.h"
 #include "utils/builtins.h"
 #include "utils/fmgroids.h"

src/backend/commands/tablecmds.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.288 2009/06/18 01:27:02 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.289 2009/07/12 17:12:33 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -51,7 +51,6 @@
 #include "nodes/nodeFuncs.h"
 #include "nodes/parsenodes.h"
 #include "optimizer/clauses.h"
-#include "parser/gramparse.h"
 #include "parser/parse_clause.h"
 #include "parser/parse_coerce.h"
 #include "parser/parse_expr.h"

src/backend/parser/gram.y

@@ -4,14 +4,14 @@
 /*-------------------------------------------------------------------------
  *
  * gram.y
- *	  POSTGRES SQL YACC rules/actions
+ *	  POSTGRESQL BISON rules/actions
  *
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.666 2009/07/06 02:58:40 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.667 2009/07/12 17:12:33 tgl Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -58,6 +58,7 @@
 #include "nodes/makefuncs.h"
 #include "nodes/nodeFuncs.h"
 #include "parser/gramparse.h"
+#include "parser/parser.h"
 #include "storage/lmgr.h"
 #include "utils/date.h"
 #include "utils/datetime.h"
@@ -6807,7 +6808,7 @@ opt_hold: /* EMPTY */						{ $$ = 0; }
  *
  * There is an ambiguity when a sub-SELECT is within an a_expr and there
  * are excess parentheses: do the parentheses belong to the sub-SELECT or
- * to the surrounding a_expr?  We don't really care, but yacc wants to know.
+ * to the surrounding a_expr?  We don't really care, but bison wants to know.
  * To resolve the ambiguity, we are careful to define the grammar so that
  * the decision is staved off as long as possible: as long as we can keep
  * absorbing parentheses into the sub-SELECT, we will do so, and only when
@@ -8204,7 +8205,7 @@ a_expr:		c_expr									{ $$ = $1; }
 				}
 		/*
 		 * These operators must be called out explicitly in order to make use
-		 * of yacc/bison's automatic operator-precedence handling.  All other
+		 * of bison's automatic operator-precedence handling.  All other
 		 * operator names are handled by the generic productions using "Op",
 		 * below; and all those operators will have the same precedence.
 		 *

src/backend/parser/keywords.c

@@ -9,16 +9,14 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.212 2009/03/08 16:53:30 alvherre Exp $
+ *	  $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.213 2009/07/12 17:12:33 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
 #include "postgres.h"
 
-#include "nodes/nodes.h"
-#include "nodes/parsenodes.h"
+#include "parser/gramparse.h"
 #include "parser/keywords.h"
-#include "parser/gram.h"
 
 #define PG_KEYWORD(a,b,c) {a,b,c},
 

src/backend/parser/parse_utilcmd.c

@@ -19,7 +19,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	$PostgreSQL: pgsql/src/backend/parser/parse_utilcmd.c,v 2.21 2009/06/11 14:49:00 momjian Exp $
+ *	$PostgreSQL: pgsql/src/backend/parser/parse_utilcmd.c,v 2.22 2009/07/12 17:12:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -42,12 +42,12 @@
 #include "nodes/makefuncs.h"
 #include "nodes/nodeFuncs.h"
 #include "parser/analyze.h"
-#include "parser/gramparse.h"
 #include "parser/parse_clause.h"
 #include "parser/parse_expr.h"
 #include "parser/parse_relation.h"
 #include "parser/parse_type.h"
 #include "parser/parse_utilcmd.h"
+#include "parser/parser.h"
 #include "rewrite/rewriteManip.h"
 #include "utils/acl.h"
 #include "utils/builtins.h"

src/backend/parser/parser.c

@@ -14,15 +14,14 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/parser/parser.c,v 1.78 2009/06/11 14:49:00 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/parser/parser.c,v 1.79 2009/07/12 17:12:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
 
 #include "postgres.h"
 
-#include "parser/gramparse.h"	/* required before parser/gram.h! */
-#include "parser/gram.h"
+#include "parser/gramparse.h"
 #include "parser/parser.h"
 
 

src/backend/parser/scan.l

@@ -24,7 +24,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/parser/scan.l,v 1.153 2009/05/05 21:09:23 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/parser/scan.l,v 1.154 2009/07/12 17:12:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -35,8 +35,6 @@
 
 #include "parser/gramparse.h"
 #include "parser/keywords.h"
-/* Not needed now that this file is compiled as part of gram.y */
-/* #include "parser/gram.h" */
 #include "parser/scansup.h"
 #include "mb/pg_wchar.h"
 

src/backend/utils/adt/ruleutils.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.300 2009/06/11 14:49:04 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.301 2009/07/12 17:12:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -39,10 +39,10 @@
 #include "nodes/nodeFuncs.h"
 #include "optimizer/clauses.h"
 #include "optimizer/tlist.h"
-#include "parser/gramparse.h"
 #include "parser/keywords.h"
 #include "parser/parse_func.h"
 #include "parser/parse_oper.h"
+#include "parser/parser.h"
 #include "parser/parsetree.h"
 #include "rewrite/rewriteHandler.h"
 #include "rewrite/rewriteManip.h"

src/backend/utils/misc/guc.c

@@ -10,7 +10,7 @@
  * Written by Peter Eisentraut <peter_e@gmx.net>.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.505 2009/06/11 14:49:06 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.506 2009/07/12 17:12:34 tgl Exp $
  *
  *--------------------------------------------------------------------
  */
@@ -44,10 +44,10 @@
 #include "optimizer/geqo.h"
 #include "optimizer/paths.h"
 #include "optimizer/planmain.h"
-#include "parser/gramparse.h"
 #include "parser/parse_expr.h"
 #include "parser/parse_relation.h"
 #include "parser/parse_type.h"
+#include "parser/parser.h"
 #include "parser/scansup.h"
 #include "pgstat.h"
 #include "postmaster/autovacuum.h"

src/include/parser/gramparse.h

 /*-------------------------------------------------------------------------
  *
  * gramparse.h
- *	  Declarations for routines exported from lexer and parser files.
+ *		Shared definitions for the "raw" parser (flex and bison phases only)
+ *
+ * NOTE: this file is only meant to be included in the core parsing files,
+ * ie, parser.c, gram.y, scan.l, and keywords.c.  Definitions that are needed
+ * outside the core parser should be in parser.h.
  *
  *
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/parser/gramparse.h,v 1.44 2009/06/11 14:49:11 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/parser/gramparse.h,v 1.45 2009/07/12 17:12:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -27,17 +31,10 @@
  */
 #define YYLTYPE  int
 
-typedef enum
-{
-	BACKSLASH_QUOTE_OFF,
-	BACKSLASH_QUOTE_ON,
-	BACKSLASH_QUOTE_SAFE_ENCODING
-} BackslashQuoteType;
-
-/* GUC variables in scan.l (every one of these is a bad idea :-() */
-extern int	backslash_quote;
-extern bool escape_string_warning;
-extern bool standard_conforming_strings;
+/*
+ * After defining YYLTYPE, it's safe to include gram.h.
+ */
+#include "parser/gram.h"
 
 
 /* from parser.c */
@@ -53,7 +50,5 @@ extern void base_yyerror(const char *message);
 /* from gram.y */
 extern void parser_init(void);
 extern int	base_yyparse(void);
-extern List *SystemFuncName(char *name);
-extern TypeName *SystemTypeName(char *name);
 
 #endif   /* GRAMPARSE_H */

src/include/parser/parser.h

 /*-------------------------------------------------------------------------
  *
  * parser.h
- *		Definitions for the "raw" parser (lex and yacc phases only)
+ *		Definitions for the "raw" parser (flex and bison phases only)
  *
+ * This is the external API for the raw lexing/parsing functions.
  *
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/parser/parser.h,v 1.25 2009/04/19 21:50:08 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/parser/parser.h,v 1.26 2009/07/12 17:12:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
 #ifndef PARSER_H
 #define PARSER_H
 
-#include "nodes/pg_list.h"
+#include "nodes/parsenodes.h"
 
+
+typedef enum
+{
+	BACKSLASH_QUOTE_OFF,
+	BACKSLASH_QUOTE_ON,
+	BACKSLASH_QUOTE_SAFE_ENCODING
+} BackslashQuoteType;
+
+/* GUC variables in scan.l (every one of these is a bad idea :-() */
+extern int	backslash_quote;
+extern bool escape_string_warning;
+extern bool standard_conforming_strings;
+
+
+/* Primary entry points for the raw parsing functions */
 extern List *raw_parser(const char *str);
 
 extern char *pg_parse_string_token(const char *token);
 
+/* Utility functions exported by gram.y (perhaps these should be elsewhere) */
+extern List *SystemFuncName(char *name);
+extern TypeName *SystemTypeName(char *name);
+
 #endif   /* PARSER_H */

src/pl/plpgsql/src/pl_comp.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_comp.c,v 1.136 2009/06/11 14:49:14 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_comp.c,v 1.137 2009/07/12 17:12:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -28,7 +28,6 @@
 #include "catalog/pg_type.h"
 #include "funcapi.h"
 #include "nodes/makefuncs.h"
-#include "parser/gramparse.h"
 #include "parser/parse_type.h"
 #include "tcop/tcopprot.h"
 #include "utils/array.h"