Introduce ada_binop_addsub_operation

This adds class ada_binop_addsub_operation, which implements the Ada +
and - operators.

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

	* ada-lang.c (ada_binop_addsub_operation::evaluate): New method.
	* ada-exp.h (class ada_binop_addsub_operation): New.

1 files changed, 16 insertions, 0 deletions

diff --git a/gdb/ada-exp.h b/gdb/ada-exp.h
index de69210bd2a..ad69d939489 100644
--- a/gdb/ada-exp.h
+++ b/gdb/ada-exp.h
@@ -134,6 +134,22 @@ public:
   { return UNOP_IN_RANGE; }
 };
 
+/* The Ada + and - operators.  */
+class ada_binop_addsub_operation
+  : public tuple_holding_operation<enum exp_opcode, operation_up, 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 std::get<0> (m_storage); }
+};
+
 } /* namespace expr */
 
 #endif /* ADA_EXP_H */