public static void Bar() { IHostEnvironment env = null; var text = TextLoader.CreateReader(env, ctx => new { Label = ctx.LoadBool(0), Text = ctx.LoadText(1), NumericFeatures = ctx.LoadFloat(2, 5) }); var est = text.MakeNewEstimator(); // This should work. est.Append(r => new { r.Text }); IDataView view = null; view.AssertStatic(env, c => new Class1(c.I4.Scalar, c.Bool.Vector)); view.AssertStatic(env, c => new Class2 { F1 = c.I4.Scalar, F2 = c.Bool.Vector }); view.AssertStatic(env, c => new Class3 <Class2> { F1 = new Class1(c.I4.Scalar, c.Bool.Vector), F2 = new Class2 { F1 = c.I4.Scalar, F2 = c.Bool.Vector } }); view.AssertStatic(env, c => new Class4 { F1 = c.I4.Scalar }); view.AssertStatic <Class5>(env, c => null); view.AssertStatic(env, c => new Class6(c.I4.Scalar, c.Bool.Vector)); view.AssertStatic(env, c => new Class7 { F2 = c.Bool.Vector }); view.AssertStatic(env, c => new Class8(c.I4.Scalar, c.Bool.Vector)); view.AssertStatic(env, c => new Class9 { F1 = c.I4.Scalar, F2 = c.Bool.Vector }); view.AssertStatic(env, c => new Class10(c.I4.Scalar, c.Bool.Vector)); view.AssertStatic(env, c => new Class11(c.I4.Scalar, c.Bool.Vector, c.Bool.Vector)); // This is wrong but should not fail with our diagnostic since there is a deeper problem that the class // simply is not there. var text2 = TextLoader.CreateReader(env, ctx => new MissingClass(ctx.LoadText(0))); }