Support await ValueTask

Author: neuecc

sandbox/SingleContainedApp/Program.cs

@@ -1,4 +1,6 @@
-using ConsoleAppFramework;
+#pragma warning disable CS1998 
+
+using ConsoleAppFramework;
 using ConsoleAppFramework.Logging;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -158,12 +160,16 @@ public async Task Throw()
 
     public class SimpleTwoArgs : ConsoleAppBase
     {
-        public void Hello(
-            string name,
-            int repeat)
+        public async ValueTask<int> Hello(string name, int repeat)
         {
             Context.Logger.LogInformation($"name:{name}");
+
+            Context.Logger.LogInformation($"Wait {repeat} Seconds.");
+            await Task.Delay(TimeSpan.FromSeconds(repeat));
+
             Context.Logger.LogInformation($"repeat:{repeat}");
+
+            return 100;
         }
     }
 
@@ -173,6 +179,8 @@ static async Task Main(string[] args)
         {
             //args = new[] { "-array", "10,20,30", "-person", @"{""Age"":10,""Name"":""foo""}" };
 
+            args = new[] { "-name", "aaa", "-repeat", "3" };
+
 
             await Host.CreateDefaultBuilder()
                 .ConfigureLogging(logging =>

src/ConsoleAppFramework/ConsoleAppEngine.cs

@@ -162,6 +162,12 @@ async Task RunCore(ConsoleAppContext ctx, Type type, MethodInfo methodInfo, stri
                     case Task task:
                         await task;
                         break;
+                    case ValueTask<int> valueTaskWithExitCode:
+                        Environment.ExitCode = await valueTaskWithExitCode;
+                        break;
+                    case ValueTask valueTask:
+                        await valueTask;
+                        break;
                 }
             }
             catch (Exception ex)

tests/ConsoleAppFramework.Integration.Test/ConsoleAppFramework.Integration.Test.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>netcoreapp3.0</TargetFramework>
-
+      <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
   </PropertyGroup>