* src/symtab.c (symbol_check_alias_consistency): Also check

type names, destructors, and printers.
Reported by Alexandre Duret-Lutz.
Recode the handling of associativity and precedence in terms
of symbol_precedence_set.
Accept no redeclaration at all, not even equal to the previous
value.
(redeclaration): New.
Use it to factor redeclaration complaints.
(symbol_make_alias): Don't set the type of the alias, let
symbol_check_alias_consistency do it as for other features.
* src/symtab.h (symbol): Add new member prec_location, and
type_location.
* src/symtab.c (symbol_precedence_set, symbol_type_set): Set them.
* tests/input.at (Incompatible Aliases): New.

tests/input.at

@@ -1,5 +1,5 @@
 # Checking the Bison scanner.                    -*- Autotest -*-
-# Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -82,6 +82,43 @@ input.y:6.5: warning: empty rule for typed nonterminal, and no action
 AT_CLEANUP
 
 
+## ---------------------- ##
+## Incompatible Aliases.  ##
+## ---------------------- ##
+
+AT_SETUP([Incompatible Aliases])
+
+AT_DATA([input.y],
+[[%token foo "foo"
+
+%type <bar>       foo
+%printer {bar}    foo
+%destructor {bar} foo
+%left             foo
+
+%type <baz>       "foo"
+%printer {baz}    "foo"
+%destructor {baz} "foo"
+%left             "foo"
+
+%%
+exp: foo;
+]])
+
+AT_CHECK([bison input.y], [1], [],
+[[input.y:8.7-11: %type redeclaration for foo
+input.y:3.7-11: first declaration
+input.y:10.13-17: %destructor redeclaration for foo
+input.y:5.13-17: first declaration
+input.y:9.19-23: %printer redeclaration for foo
+input.y:10.13-17: first declaration
+input.y:11.1-5: %left redeclaration for foo
+input.y:6.1-5: first declaration
+]])
+
+AT_CLEANUP
+
+
 
 ## ----------------------- ##
 ## Torturing the Scanner.  ##