Shader: Cleanup and rename AST files

include/Nazara/Shader/Ast/AstUtils.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/Ast/AstUtils.hpp>
+#include <Nazara/Shader/Debug.hpp>
+
+namespace Nz::ShaderAst
+{
+	ExpressionCategory GetExpressionCategory(Expression& expression)
+	{
+		ShaderAstValueCategory visitor;
+		return visitor.GetExpressionCategory(expression);
+	}
+}
+
+#include <Nazara/Shader/DebugOff.hpp>