Introduce ada_atr_val_operation

This adds class ada_atr_val_operation, which implements OP_ATR_VAL.

gdb/ChangeLog
2021-03-08  Tom Tromey  <tom@tromey.com>

	* ada-lang.c (ada_val_atr): No longer static.
	(ada_atr_val_operation::evaluate): New method.
	* ada-exp.h (class ada_atr_val_operation): New.

1 files changed, 19 insertions, 0 deletions

diff --git a/gdb/ada-exp.h b/gdb/ada-exp.h
index 07744c1c8ea..c86b0548947 100644
--- a/gdb/ada-exp.h
+++ b/gdb/ada-exp.h
@@ -69,6 +69,9 @@ extern struct value *ada_pos_atr (struct type *expect_type,
 				  struct expression *exp,
 				  enum noside noside, enum exp_opcode op,
 				  struct value *arg);
+extern struct value *ada_val_atr (enum noside noside, struct type *type,
+				  struct value *arg);
+
 
 namespace expr
 {
@@ -334,6 +337,22 @@ protected:
   using operation::do_generate_ax;
 };
 
+/* Implement the Ada 'val attribute.  */
+class ada_atr_val_operation
+  : public tuple_holding_operation<struct type *, operation_up>
+{
+public:
+
+  using tuple_holding_operation::tuple_holding_operation;
+
+  value *evaluate (struct type *expect_type,
+		   struct expression *exp,
+		   enum noside noside) override;
+
+  enum exp_opcode opcode () const override
+  { return OP_ATR_VAL; }
+};
+
 } /* namespace expr */
 
 #endif /* ADA_EXP_H */