From 82b0bc9b58e70ecd46f443143215497f8aba6331 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Mon, 4 Jul 2016 19:10:10 -0400
Subject: [PATCH] Discovered that this is another meaningful usage of `using`.

---
 Components/6522/6522.hpp  | 2 +-
 Machines/Vic-20/Vic20.hpp | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Components/6522/6522.hpp b/Components/6522/6522.hpp
index c97adf70a..91e785aef 100644
--- a/Components/6522/6522.hpp
+++ b/Components/6522/6522.hpp
@@ -286,7 +286,7 @@ template <class T> class MOS6522 {
 		void set_port_output(Port port, uint8_t value, uint8_t direction_mask)	{}
 		bool get_control_line(Port port, Line line)								{	return true;	}
 		void set_control_line_output(Port port, Line line, bool value)			{}
-//		void set_interrupt_status(bool status)			{}
+		void set_interrupt_status(bool status)			{}
 
 		// Input/output multiplexer
 		uint8_t get_port_input(Port port, uint8_t output_mask, uint8_t output)
diff --git a/Machines/Vic-20/Vic20.hpp b/Machines/Vic-20/Vic20.hpp
index 3f5f247c8..43af4d36c 100644
--- a/Machines/Vic-20/Vic20.hpp
+++ b/Machines/Vic-20/Vic20.hpp
@@ -63,6 +63,8 @@ class UserPortVIA: public MOS::MOS6522<UserPortVIA>, public MOS::MOS6522IRQDeleg
 				printf("Tape motor %s\n", value ? "on" : "off");
 			}
 		}
+
+		using MOS6522IRQDelegate::set_interrupt_status;
 };
 
 class KeyboardVIA: public MOS::MOS6522<KeyboardVIA>, public MOS::MOS6522IRQDelegate {
@@ -108,6 +110,8 @@ class KeyboardVIA: public MOS::MOS6522<KeyboardVIA>, public MOS::MOS6522IRQDeleg
 			}
 		}
 
+		using MOS6522IRQDelegate::set_interrupt_status;
+
 	private:
 		uint8_t _columns[8];
 		uint8_t _activation_mask;