From 39324cdd8ca253bc9a8030ef55e2a5138bd3c734 Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <loek@pipeframe.xyz>
Date: Thu, 13 Jun 2024 09:47:15 +0200
Subject: create SignalLevel to_string function

---
 Net.h                 |  7 +------
 NodeFactory.cpp       |  4 +++-
 NodeOutputVisitor.cpp |  2 +-
 SignalLevel.cpp       |  9 +++++++++
 SignalLevel.h         | 14 ++++++++++++++
 5 files changed, 28 insertions(+), 8 deletions(-)
 create mode 100644 SignalLevel.cpp
 create mode 100644 SignalLevel.h

diff --git a/Net.h b/Net.h
index 7168186..edd3dfe 100644
--- a/Net.h
+++ b/Net.h
@@ -1,12 +1,7 @@
 #pragma once
 
 #include "Observer.h"
-
-enum SignalLevel {
-	LOW,
-	HIGH,
-	UNDEFINED
-};
+#include "SignalLevel.h"
 
 class Net : public Subject {
 private:
diff --git a/NodeFactory.cpp b/NodeFactory.cpp
index c9d4f20..6105c2d 100644
--- a/NodeFactory.cpp
+++ b/NodeFactory.cpp
@@ -1,3 +1,4 @@
+#include <cassert>
 #include <locale>
 #include <ranges>
 #include <algorithm>
@@ -22,7 +23,8 @@ void NodeFactory::assign(const char * _type, const Node * node) {
 	string type = _type;
 	type = normalize_type(type);
 
-	if (has_type(type)) return; // TODO: exception?
+	// ensure there is only one class that registers a type
+	assert(!has_type(type));
 
 	// printf("map[\"%s\"] = %p\n", type.c_str(), node);
 	map[type] = node;
diff --git a/NodeOutputVisitor.cpp b/NodeOutputVisitor.cpp
index ca00fd4..e92224c 100644
--- a/NodeOutputVisitor.cpp
+++ b/NodeOutputVisitor.cpp
@@ -2,7 +2,7 @@
 
 void NodeOutputVisitor::visit(Node & node) { }
 void NodeOutputVisitor::visit(NodeOutput & node) {
-	level = node.level(); // TODO: dit klopt niet
+	level = node.level();
 	output_node = true;
 }
 
diff --git a/SignalLevel.cpp b/SignalLevel.cpp
new file mode 100644
index 0000000..daba33c
--- /dev/null
+++ b/SignalLevel.cpp
@@ -0,0 +1,9 @@
+#include "SignalLevel.h"
+
+std::string std::to_string(SignalLevel level) {
+	if (level == HIGH) return "HIGH";
+	if (level == LOW) return "LOW";
+	if (level == UNDEFINED) return "UNDEFINED";
+	return "???";
+}
+
diff --git a/SignalLevel.h b/SignalLevel.h
new file mode 100644
index 0000000..81c7ff8
--- /dev/null
+++ b/SignalLevel.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <string>
+
+enum SignalLevel {
+	LOW,
+	HIGH,
+	UNDEFINED
+};
+
+namespace std {
+	std::string to_string(SignalLevel level);
+}
+
-- 
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