Three Ways Roslyn Will Change Your Life

Transcription

1 Kathleen Dollard - kathleendollard kathleen@mvps.org Blog: -dollard Three Ways Roslyn Will Change Your Life

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4 Language History Version CLR Date.NET Framework Visual Studio C# 1.0 / VB January 2002.NET Framework 1.0 Visual Studio.NET 2002 C# 1.2 / VB April 2003.NET Framework 1.1 Visual Studio.NET 2003 C# 2.0 / VB November 2005.NET Framework 2.0 Visual Studio 2005 C# 3.0 /VB SP1 November 2007.NET Framework 2.0.NET Framework 3.0 ].NET Framework 3.5 Visual Studio 2008 Visual Studio 2010 C# 4.0 / VB April 2010.NET Framework 4 Visual Studio 2010 C# 5.0 / VB August 2012.NET Framework 4.5 Visual Studio 2012 Visual Studio 2013 C# and VB Vnext VNext 2015?? VNext VNext From

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6 Console public void HelloWorld() Console.WriteLine("Hello World"); } System.Console Mine.Console

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8 Compiler Pipeline

9 Compiler Pipeline Compiler API

10 Compiler Pipeline Compiler API Language Service

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13 I was at her talk yesterday I was not at her talk yesterday

14 Let s build an analyzer with code fix!!! Analyzers and code fixes let you define rules for your projects, and define guidelines for libraries

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17 What have people already done with Roslyn? Quick look at OzCode, CodeConnect and ScriptCS

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19 Didn t you think more like... o Customer class implements INotifyPropertyChanged FirstName property (string) LastName property (string) Birthdate property (date) Id property (integer)

20 Common Language Agnostic Mutable DOM Source Code Language Agnostic RoslynDom Model Load GetSyntax Source Code

21 Common Language Agnostic Mutable DOM Source Code Load Language Agnostic RoslynDom Model GetSyntax Source Code Roslyn Roslyn

22 How do you think about this code? namespace Foo namespace Bar1 class FooBar } } } namespace Foo.Bar1 class FooBar } } A. I think of them both as two nested namespaces B. I think of them both as a single dotted namespace C. I think of the first as nested namespaces and the second as a dotted namespace D. I m not a.net programmer or I m distracted by the shiny lights

23 How do you think about this code? public async Task<int> FooBar() var x = 1; var y = x + 1; // more styff await Task.Delay(1000); return 42; } A. I think of this as a single set of code with something special in the middle (await) B. I think of this as a block of code that runs before the delay, and a separate block after the delay C. It depends on what I m doing D. I don t know enough about async in.net to answer

24 Let s dream my dream

25 Window title using System; using System.ComponentModel; namespace ExpansionFirstExample public sealed class Customer : INotifyPropertyChan public event PropertyChangedEventHandler Proper [NotifyPropertyChanged] public class Customer : BizBase<Customer> public string FirstName get; set; } public string LastName get; set; } public int Id get; set; } public DateTime BirthDate get; set; } } private string firstname; public string FirstName get return firstname; } set SetProperty(ref firstname, value); } } private string lastname; public string LastName get return lastname; } set SetProperty(ref lastname, value); } } private int id; public int Id

26 Window title Happy Humans using System; using System.ComponentModel; Real code debugging, interacts with other code namespace ExpansionFirstExample public sealed class Customer : INotifyPropertyChan public event PropertyChangedEventHandler Proper [NotifyPropertyChanged] public class Customer : BizBase<Customer> public string FirstName get; set; } public string LastName get; set; } public int Id get; set; } public DateTime BirthDate get; set; } } private string firstname; public string FirstName get return firstname; } set SetProperty(ref firstname, value); } } private string lastname; public string LastName get return lastname; } set SetProperty(ref lastname, value); } } private int id; public int Id

27 Window title [NotifyPropertyChanged] public class Customer : BizBase<Customer> public string FirstName get; set; } public string LastName get; set; } public int Id get; set; } using System; using System.ComponentModel; namespace ExpansionFirstExample public sealed class Customer : INotifyPropertyChan public event PropertyChangedEventHandler Proper private string firstname; public string FirstName get return firstname; } set SetProperty(ref firstname, value); } } private string lastname; public string LastName get return lastname; } set SetProperty(ref lastname, value); } } private int id; public int Id

28 Window title [NotifyPropertyChanged] public class Customer : BizBase<Customer> public string FirstName get; set; } public string LastName get; set; } public int Id get; set; } using System; using System.ComponentModel; namespace ExpansionFirstExample public sealed class Customer : INotifyPropertyChan public event PropertyChangedEventHandler Proper private string firstname; public string FirstName get return firstname; } set SetProperty(ref firstname, value); } } private string lastname; public string LastName get return lastname; } set SetProperty(ref lastname, value); } } private int id; public int Id

29 Window title [NotifyPropertyChanged] public class Customer : BizBase<Customer> public string FirstName get; set; } public string LastName get; set; } public int Id get; set; }

30 Window title [NotifyPropertyChanged] Change to left affects right Change to right changes left if possible Else, custom source, alters template, or cancels public class Customer : BizBase<Customer> public string FirstName get; set; } Change to template requests scope of change Templates can be in a governance hierarchy public string LastName get; set; } Initial templates proposed on intelligent diff of source (Ok, ambitious) public int Id get; set; }

31 My real dream is that you can realize your dream