-uint get_stride(const VertexFormat &);
-std::istream &operator>>(std::istream &, VertexFormat &);
+inline unsigned get_stride(const VertexFormat &f)
+{ return f.stride(); }
+
+void operator>>(const LexicalConverter &, VertexComponent &);
+void operator>>(const LexicalConverter &, VertexFormat &);