Introduce type_instance_operation

This adds class type_instance_operation, which implements
TYPE_INSTANCE.

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

	* expop.h (class type_instance_operation): New.
	* eval.c (type_instance_operation::evaluate): New method.

1 files changed, 17 insertions, 0 deletions

diff --git a/gdb/expop.h b/gdb/expop.h
index 7c0768ca6c1..b196de52d0b 100644
--- a/gdb/expop.h
+++ b/gdb/expop.h
@@ -1740,6 +1740,23 @@ protected:
     override;
 };
 
+/* Implement the "type instance" operation.  */
+class type_instance_operation
+  : public tuple_holding_operation<type_instance_flags, std::vector<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 TYPE_INSTANCE; }
+};
+
 } /* namespace expr */
 
 #endif /* EXPOP_H */