public void ConditionalMember_Compile_Field_Ref()
{
var p = Expression.Parameter(typeof(Qux));
var q = new Qux();
var m1 = CSharpExpression.ConditionalField(p, "Y");
var f1 = Expression.Lambda <Func <Qux, int?> >(m1, p);
var d1 = f1.Compile();
Assert.AreEqual(42, d1(q));
Assert.IsNull(d1(null));
var m2 = CSharpExpression.ConditionalField(p, "O");
var f2 = Expression.Lambda <Func <Qux, int?> >(m2, p);
var d2 = f2.Compile();
Assert.AreEqual(42, d2(q));
Assert.IsNull(d2(null));
var m3 = CSharpExpression.ConditionalField(p, "T");
var f3 = Expression.Lambda <Func <Qux, string> >(m3, p);
var d3 = f3.Compile();
Assert.AreEqual("bar", d3(q));
Assert.IsNull(d3(null));
}
public void ConditionalCall_Compile_Ref()
{
var p = Expression.Parameter(typeof(Qux));
var q = new Qux();
var m1 = CSharpExpression.ConditionalCall(p, typeof(Qux).GetMethod("X"));
var f1 = Expression.Lambda <Func <Qux, int?> >(m1, p);
var d1 = f1.Compile();
Assert.AreEqual(42, d1(q));
Assert.IsNull(d1(null));
var m2 = CSharpExpression.ConditionalCall(p, typeof(Qux).GetMethod("N"));
var f2 = Expression.Lambda <Func <Qux, int?> >(m2, p);
var d2 = f2.Compile();
Assert.AreEqual(42, d2(q));
Assert.IsNull(d2(null));
var m3 = CSharpExpression.ConditionalCall(p, typeof(Qux).GetMethod("S"));
var f3 = Expression.Lambda <Func <Qux, string> >(m3, p);
var d3 = f3.Compile();
Assert.AreEqual("bar", d3(q));
Assert.IsNull(d3(null));
var m4 = CSharpExpression.ConditionalCall(p, typeof(Qux).GetMethod("V"));
var f4 = Expression.Lambda <Action <Qux> >(m4, p);
var d4 = f4.Compile();
d4(q); // does not throw
}