* parser-defs.h (struct exp_descriptor): New definition, containing

language-specific info for printing, prefixifying, dumping, and
evaluating expressions.
(exp_descriptor_standard): Declare new variable.
(print_subexp): Make global and declare here (from expprint.c).
(dump_subexp): Ditto.
(dump_subexp_body_standard): Declare.
(operator_length_standard): Declare.
(op_name_standard): Declare.
(print_subexp): Declare.
(print_subexp_standard): Declare.

* language.h (struct language_defn): Add la_exp_desc field to hold
pointer to table for language-specific operators.
Remove evaluate_exp field, which is now in struct exp_descriptor.

* parse.c (operator_length): Move most code to new
operator_length_standard function.  Use language-specific information.
(operator_length_standard): New function taking most code from
operator_length.
(exp_descriptor_standard): New constant.

* expression.h (enum exp_opcode): Add definitions of OP_EXTENDED0
and OP_EXTENDED_LAST.

* expprint.c (print_subexp): Use language-specific print_subexp.
Make global; remove static declaration.
Move most code to print_subexp_standard.
(print_subexp_standard): New function, containing code formerly in
print_subexp.
(op_name): Add expression to argument signature.
Use langauge-specific op_name.
Move most code to op_name_standard.
(op_name_standard): New function, containing code formerly in op_name.
(dump_subexp): 	Use new version of op_name function.
Use language-specific dump_subexp_body, and move most existing code to
dump_subexp_body_standard.
(dump_raw_expression): Use new op_name interface.
(dump_subexp_body): Move most code to dump_subexp_body_standard.
(dump_subexp_body_standard): New function, containing code formerly
in dump_subexp_body.

* language.c (unknown_language): Add default la_exp_desc field and
remove evaluate_exp field.
(auto_language): Ditto.
(local_language): Ditto.
* f-lang.c (f_language_defn): Ditto.
* c-lang.c (c_language_defn): Ditto.
(cplus_language_defn): Ditto.
(asm_language_defn): Ditto.
(minimal_language_defn): Ditto.
* p-lang.c (pascal_language_defn): Ditto.
* m2-lang.c (m2_language_defn): Ditto.
* objc-lang.c (objc_language_defn): Ditto.

* jv-lang.c (exp_descriptor_java): New variable, containing
Java-specific expression evaluator.
(java_language_defn): Add la_exp_desc field and remove evaluate_exp
field.
* scm-lang.c (exp_descriptor_scm): New variable, containing
Scheme-specific expression evaluator.
(scm_language_defn): Add la_exp_desc field and remove evaluate_exp
field.
* objc-lang.c (print_object_command): Take evaluate_exp from the
la_exp_desc field.

* Makefile.in (eval.o): Add dependency on parser-defs.h.

* eval.c: Include parser-defs.h for the full declaration of
la_exp_desc's type.
(evaluate_subexp): Get evaluate_exp out of la_exp_desc field.

gdb/expprint.c

@@ -36,11 +36,6 @@
 #include <ctype.h>
 #endif
 
-/* Prototypes for local functions */
-
-static void print_subexp (struct expression *, int *, struct ui_file *,
-			  enum precedence);
-
 void
 print_expression (struct expression *exp, struct ui_file *stream)
 {
@@ -53,9 +48,18 @@ print_expression (struct expression *exp, struct ui_file *stream)
    if the precedence of the main operator of this subexpression is less,
    parentheses are needed here.  */
 
-static void
+void
 print_subexp (struct expression *exp, int *pos,
 	      struct ui_file *stream, enum precedence prec)
+{
+  exp->language_defn->la_exp_desc->print_subexp (exp, pos, stream, prec);
+}
+
+/* Standard implementation of print_subexp for use in language_defn
+   vectors.  */
+void
+print_subexp_standard (struct expression *exp, int *pos,
+		       struct ui_file *stream, enum precedence prec)
 {
   unsigned tem;
   const struct op_print *op_print_tab;
@@ -547,11 +551,22 @@ op_string (enum exp_opcode op)
 /* Support for dumping the raw data from expressions in a human readable
    form.  */
 
-static char *op_name (int opcode);
+static char *op_name (struct expression *, enum exp_opcode);
 static int dump_subexp_body (struct expression *exp, struct ui_file *, int);
 
+/* Name for OPCODE, when it appears in expression EXP. */
+
 static char *
-op_name (int opcode)
+op_name (struct expression *exp, enum exp_opcode opcode)
+{
+  return exp->language_defn->la_exp_desc->op_name (opcode);
+}
+
+/* Default name for the standard operator OPCODE (i.e., one defined in
+   the definition of enum exp_opcode).  */
+
+char *
+op_name_standard (enum exp_opcode opcode)
 {
   switch (opcode)
     {
@@ -756,7 +771,7 @@ dump_raw_expression (struct expression *exp, struct ui_file *stream,
   for (elt = 0; elt < exp->nelts; elt++)
     {
       fprintf_filtered (stream, "\t%5d  ", elt);
-      opcode_name = op_name (exp->elts[elt].opcode);
+      opcode_name = op_name (exp, exp->elts[elt].opcode);
 
       fprintf_filtered (stream, "%20s  ", opcode_name);
       print_longest (stream, 'd', 0, exp->elts[elt].longconst);
@@ -791,7 +806,7 @@ dump_subexp (struct expression *exp, struct ui_file *stream, int elt)
     fprintf_filtered (stream, " ");
   indent += 2;
 
-  fprintf_filtered (stream, "%-20s  ", op_name (exp->elts[elt].opcode));
+  fprintf_filtered (stream, "%-20s  ", op_name (exp, exp->elts[elt].opcode));
 
   elt = dump_subexp_body (exp, stream, elt);
 
@@ -806,6 +821,15 @@ dump_subexp (struct expression *exp, struct ui_file *stream, int elt)
 
 static int
 dump_subexp_body (struct expression *exp, struct ui_file *stream, int elt)
+{
+  return exp->language_defn->la_exp_desc->dump_subexp_body (exp, stream, elt);
+}
+
+/* Default value for subexp_body in exp_descriptor vector.  */
+
+int
+dump_subexp_body_standard (struct expression *exp, 
+			   struct ui_file *stream, int elt)
 {
   int opcode = exp->elts[elt++].opcode;