gistfile1.cs

        [Test]
        public void Eitherに関数を適用_途中で失敗する関数()
        {
            var safeParse = FuncUtil.Either<string, int>(int.Parse);
            var m = (Either<Exception, string>)Either.Right("hoge");
            var result = from result1 in m
                         from result2 in safeParse(result1)
                         select result2;

            Assert.That(result.Match(l => true, r => false), Is.True);
        }