ShaderAst: Big refactor + add binding/location support

include/Nazara/Renderer/GlslWriter.inl

@@ -0,0 +1,65 @@
+// Copyright (C) 2020 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Renderer module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Renderer/GlslWriter.hpp>
+#include <type_traits>
+#include <Nazara/Renderer/Debug.hpp>
+
+namespace Nz
+{
+	template<typename T>
+	void GlslWriter::Append(const T& param)
+	{
+		NazaraAssert(m_currentState, "This function should only be called while processing an AST");
+
+		m_currentState->stream << param;
+	}
+
+	template<typename T>
+	void GlslWriter::DeclareVariables(const std::vector<T>& variables, const std::string& keyword, const std::string& section)
+	{
+		if (!variables.empty())
+		{
+			if (!section.empty())
+				AppendCommentSection(section);
+
+			for (const auto& var : variables)
+			{
+				if constexpr (std::is_same_v<T, ShaderAst::InputOutput>)
+				{
+					if (var.locationIndex)
+					{
+						Append("layout(location = ");
+						Append(*var.locationIndex);
+						Append(") ");
+					}
+				}
+				else if constexpr (std::is_same_v<T, ShaderAst::Uniform>)
+				{
+					if (var.bindingIndex)
+					{
+						Append("layout(binding = ");
+						Append(*var.bindingIndex);
+						Append(") ");
+					}
+				}
+
+				if (!keyword.empty())
+				{
+					Append(keyword);
+					Append(" ");
+				}
+
+				Append(var.type);
+				Append(" ");
+				Append(var.name);
+				AppendLine(";");
+			}
+
+			AppendLine();
+		}
+	}
+}
+
+#include <Nazara/Renderer/DebugOff.hpp>