extern void print_expression (struct expression *, struct ui_file *);
-extern char *op_name (struct expression *exp, enum exp_opcode opcode);
+extern const char *op_name (struct expression *exp, enum exp_opcode opcode);
-extern char *op_string (enum exp_opcode);
+extern const char *op_string (enum exp_opcode);
extern void dump_raw_expression (struct expression *,
- struct ui_file *, char *);
+ struct ui_file *, const char *);
extern void dump_prefix_expression (struct expression *, struct ui_file *);
/* In an OP_RANGE expression, either bound could be empty, indicating