Shader: Remove ShaderNode::GetExpressionType (replaced by visitor) and minor stuff

include/Nazara/Shader/ShaderAstUtils.inl

@@ -0,0 +1,17 @@
+// Copyright (C) 2020 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Shader generator"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Shader/ShaderAstUtils.hpp>
+#include <Nazara/Shader/Debug.hpp>
+
+namespace Nz
+{
+	ShaderNodes::ExpressionCategory GetExpressionCategory(const ShaderNodes::ExpressionPtr& expression)
+	{
+		ShaderAstValueCategory visitor;
+		return visitor.GetExpressionCategory(expression);
+	}
+}
+
+#include <Nazara/Shader/DebugOff.hpp>