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mirror of https://github.com/twiglet/cs2j.git synced 2025-01-18 13:15:17 +01:00

Add DelegateSampler for showcase code

This commit is contained in:
Kevin Glynn 2011-11-11 19:35:02 +01:00
parent b446f68eb6
commit a020c85e5f
4 changed files with 183 additions and 9 deletions

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@ -15,9 +15,10 @@ namespace Tester
//Tester.Delegates.EventHandler.Sample.EHMain();
// Tester.Misc.RenameTest.RNMain("hello world");
Tester.Misc.Sorter.Example.SorterMain();
Tester.Misc.RegexTest.RegexMain();
//Tester.Misc.Sorter.Example.SorterMain();
//Tester.Misc.RegexTest.RegexMain();
Twiglet.Sample.Delegate.DelegateSampler.DelegateSamplerMain();
Console.WriteLine("Finished");
}
}
}

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@ -1,4 +1,4 @@
<?xml version="1.0" encoding="utf-8"?>
<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@ -41,6 +41,7 @@
</ItemGroup>
<ItemGroup>
<Compile Include="AssemblyInfo.cs" />
<Compile Include="Delegates\DelegateUser.cs" />
<Compile Include="Main.cs" />
<Compile Include="Enums\PacketTester.cs" />
<Compile Include="Enums\Consts.cs" />
@ -54,7 +55,7 @@
<Compile Include="Misc\MiscSyntax.cs" />
<Compile Include="Misc\RefOut.cs" />
<Compile Include="Misc\Misc.cs" />
<Compile Include="Delegates\DelegateUser.cs" />
<Compile Include="WebDelegates\DelegateSampler.cs" />
<Compile Include="Delegates\EventHandler.cs" />
<Compile Include="Misc\RenameTest.cs" />
<Compile Include="Misc\newmodifier.cs" />
@ -62,8 +63,5 @@
<Compile Include="Misc\Regex\RegexTest.cs" />
</ItemGroup>
<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
<ItemGroup>
<Folder Include="Enums\" />
<Folder Include="Misc\Regex\" />
</ItemGroup>
<ItemGroup />
</Project>

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@ -0,0 +1,175 @@
// Copyright 2011 Kevin Glynn (http://www.twigletsoftware.com)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
using System;
using System.Collections.Generic;
namespace Twiglet.Sample.Delegate
{
/// <summary>
/// Sample class to show off CS2J's translations for delegates and events
/// </summary>
public class DelegateSampler
{
public delegate void xProcessor<T>(ref T value);
//
/// <summary>
/// LogWriters take a string and record it.
/// </summary>
/// <param name="logMessage">the message to be recorded</param>
public delegate void LogWriter(string logMessage);
/// <summary>
/// A chain of delegates can't pass values to each other, (the value
/// returned from the final delegate is returned to the caller, but the
/// values from intermediate delegates are just dropped on the floor).
/// However the delegates can communictae if we use ref parameters.
/// </summary>
/// <param name="value">the variable that we are processing</param>
public delegate void Processor<T>(ref T value);
// This variable is captured by the delegates, if we change this variable
// then it changes what they print.
private string _captured_string = "none";
private void MethodDelegate(string s)
{
Console.WriteLine("MethodDelegate[" + _captured_string + "]:\t\t\t" + s);
}
private void MethodDelegateTwo(string s)
{
Console.WriteLine("MethodDelegateTwo[" + _captured_string + "]:\t\t" + s);
}
public void RunIt() {
// First we create some delegates using the many syntaxes supported by C#
// Old fashioned delegate creation
// initialize delegate with a named method.
LogWriter delA = new LogWriter(MethodDelegate);
// We can just also just assign a method group to a delegate variable
LogWriter delB = MethodDelegateTwo;
// Since C# 2.0 a delegate can be initialized with
// an "anonymous method."
LogWriter delC = delegate(string s) { Console.WriteLine("AnonymousMethodDelegate[" + _captured_string + "]:\t\t" + s); };
// Since C# 3.0 a delegate can be initialized with
// a lambda expression.
LogWriter delD = (string s) => { Console.WriteLine("LambdaExpressionDelegate[" + _captured_string + "]:\t\t" + s); };
// Since C# 3.0 a delegate can be initialized with
// a lambda expression, the type of the argument is inferred by the compiler.
LogWriter delE = s => { Console.WriteLine("InferredLambdaExpressionDelegate[" + _captured_string + "]:\t" + s); };
// Invoke the delegates.
delA("Peter Piper");
delB("picked a peck");
delC("of pickled peppers.");
delD("A peck of pickled peppers");
delE("Peter Piper picked.");
// Change the captured parameter and run them again
this._captured_string = "aaaa";
delA("Peter Piper");
delB("picked a peck");
delC("of pickled peppers.");
delD("A peck of pickled peppers");
delE("Peter Piper picked.");
// Now Combine the delegates
var chainDelegates = delA + delB + delC + delD + delE;
// and invoke it
chainDelegates("Chained Delegates");
// remove delB and rerun
chainDelegates -= delB;
chainDelegates("Chained without MethodDelegateTwo");
// Calculate (4 * (x^x)) + 1
Processor<int> calcIt = (ref int x) => { x = x*x; };
calcIt += (ref int x) => { x = 4 * x; };
calcIt += (ref int x) => { x += 1; };
int val = 5;
calcIt(ref val);
Console.WriteLine("(4 * (5^5)) + 1 = " + val);
}
delegate void DelC (string s);
static void Hello (string s)
{
System.Console.WriteLine (" Hello, {0}!", s);
}
static void Goodbye (string s)
{
System.Console.WriteLine (" Goodbye, {0}!", s);
}
void HelloGoodbye ()
{
DelC a, b, c, d;
// Create the delegate object a that references
// the method Hello:
a = Hello;
// Create the delegate object b that references
// the method Goodbye:
b = Goodbye;
// The two delegates, a and b, are composed to form c:
c = a + b;
// Remove a from the composed delegate, leaving d,
// which calls only the method Goodbye:
d = c - a;
System.Console.WriteLine ("Invoking delegate a:");
a ("A");
System.Console.WriteLine ("Invoking delegate b:");
b ("B");
System.Console.WriteLine ("Invoking delegate c:");
c ("C");
System.Console.WriteLine ("Invoking delegate d:");
d ("D");
d += c;
d += c;
d -= c;
System.Console.WriteLine ("Invoking composed delegate d:");
d ("DA");
}
public static void DelegateSamplerMain()
{
DelegateSampler sampler = new DelegateSampler ();
sampler.RunIt();
}
}
}