From bf1c7d0e371a9fb2dda76d9a4ba374d2c1bc55ff Mon Sep 17 00:00:00 2001
From: Adrian Conlon <adrian.conlon@gmail.com>
Date: Mon, 23 Aug 2021 09:40:54 +0100
Subject: [PATCH] Add a "flip" method to device to allow tone sequence
 generation.

Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
---
 inc/Device.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/inc/Device.h b/inc/Device.h
index f3ab5ed..0263aa4 100644
--- a/inc/Device.h
+++ b/inc/Device.h
@@ -104,6 +104,8 @@ namespace EightBit {
 		static constexpr void match(PinLevel& line, bool condition) noexcept { condition ? raise(line) : lower(line); }
 		static constexpr void match(PinLevel& out, PinLevel in) noexcept { out = in; }
 
+		static constexpr void flip(PinLevel& out) noexcept { out = out == PinLevel::Low ? PinLevel::High : PinLevel::Low; }
+
 		virtual ~Device() noexcept {};
 
 		[[nodiscard]] constexpr bool powered() const noexcept { return raised(POWER()); }