Add test configuration for mcs 5.23.0

ICSharpCode.Decompiler.Tests/CorrectnessTestRunner.cs

@@ -75,8 +75,10 @@ public void AllFilesHaveTests()
 			CompilerOptions.Optimize | CompilerOptions.UseRoslyn3_11_0,
 			CompilerOptions.UseRoslynLatest,
 			CompilerOptions.Optimize | CompilerOptions.UseRoslynLatest,
-			CompilerOptions.UseMcs,
-			CompilerOptions.Optimize | CompilerOptions.UseMcs
+			CompilerOptions.UseMcs2_6_4,
+			CompilerOptions.Optimize | CompilerOptions.UseMcs2_6_4,
+			CompilerOptions.UseMcs5_23,
+			CompilerOptions.Optimize | CompilerOptions.UseMcs5_23
 		};
 
 		static readonly CompilerOptions[] roslynOnlyOptions =
@@ -286,7 +288,7 @@ public void StackTypes([Values(false, true)] bool force32Bit)
 		[Test]
 		public void UnsafeCode([ValueSource(nameof(defaultOptions))] CompilerOptions options)
 		{
-			if (options.HasFlag(CompilerOptions.UseMcs))
+			if (options.HasFlag(CompilerOptions.UseMcs2_6_4))
 			{
 				Assert.Ignore("Decompiler bug with mono!");
 			}
@@ -314,7 +316,7 @@ public void Capturing([ValueSource(nameof(defaultOptions))] CompilerOptions opti
 		[Test]
 		public void YieldReturn([ValueSource(nameof(defaultOptions))] CompilerOptions options)
 		{
-			if (options.HasFlag(CompilerOptions.UseMcs))
+			if ((options & CompilerOptions.UseMcsMask) != 0)
 			{
 				Assert.Ignore("Decompiler bug with mono!");
 			}
@@ -348,7 +350,7 @@ public void DynamicTests([ValueSource(nameof(noMonoOptions))] CompilerOptions op
 		[Test]
 		public void MiniJSON([ValueSource(nameof(defaultOptions))] CompilerOptions options)
 		{
-			if (options.HasFlag(CompilerOptions.UseMcs))
+			if (options.HasFlag(CompilerOptions.UseMcs2_6_4))
 			{
 				Assert.Ignore("Decompiler bug with mono!");
 			}
@@ -366,12 +368,12 @@ void RunCS([CallerMemberName] string testName = null, CompilerOptions options =
 				outputFile = Tester.CompileCSharp(Path.Combine(TestCasePath, testFileName), options,
 					outputFileName: Path.Combine(TestCasePath, testOutputFileName));
 				string decompiledCodeFile = Tester.DecompileCSharp(outputFile.PathToAssembly, Tester.GetSettings(options));
-				if (options.HasFlag(CompilerOptions.UseMcs))
+				if ((options & CompilerOptions.UseMcsMask) != 0)
 				{
 					// For second pass, use roslyn instead of mcs.
 					// mcs has some compiler bugs that cause it to not accept ILSpy-generated code,
 					// for example when there's unreachable code due to other compiler bugs in the first mcs run.
-					options &= ~CompilerOptions.UseMcs;
+					options &= ~CompilerOptions.UseMcsMask;
 					options |= CompilerOptions.UseRoslynLatest;
 					// Also, add an .exe.config so that we consistently use the .NET 4.x runtime.
 					File.WriteAllText(outputFile.PathToAssembly + ".config", @"<?xml version=""1.0"" encoding=""utf-8""?>

ICSharpCode.Decompiler.Tests/Helpers/Tester.VB.cs

@@ -40,7 +40,7 @@ public static CompilerResults CompileVB(string sourceFileName, CompilerOptions f
 
 			var preprocessorSymbols = GetPreprocessorSymbols(flags).Select(symbol => new KeyValuePair<string, object>(symbol, 1)).ToList();
 
-			if (!flags.HasFlag(CompilerOptions.UseMcs))
+			if ((flags & CompilerOptions.UseMcsMask) == 0)
 			{
 				CompilerResults results = new CompilerResults(new TempFileCollection());
 				results.PathToAssembly = outputFileName ?? Path.GetTempFileName();

ICSharpCode.Decompiler.Tests/Helpers/Tester.cs

@@ -55,14 +55,16 @@ public enum CompilerOptions
 		Force32Bit = 0x4,
 		Library = 0x8,
 		UseRoslyn1_3_2 = 0x10,
-		UseMcs = 0x20,
+		UseMcs2_6_4 = 0x20,
 		ReferenceVisualBasic = 0x40,
 		ReferenceCore = 0x80,
 		GeneratePdb = 0x100,
 		Preview = 0x200,
 		UseRoslyn2_10_0 = 0x400,
 		UseRoslyn3_11_0 = 0x800,
 		UseRoslynLatest = 0x1000,
+		UseMcs5_23 = 0x2000,
+		UseMcsMask = UseMcs2_6_4 | UseMcs5_23,
 		UseRoslynMask = UseRoslyn1_3_2 | UseRoslyn2_10_0 | UseRoslyn3_11_0 | UseRoslynLatest
 	}
 
@@ -335,7 +337,7 @@ public static List<string> GetPreprocessorSymbols(CompilerOptions flags)
 					}
 				}
 			}
-			else if (flags.HasFlag(CompilerOptions.UseMcs))
+			else if ((flags & CompilerOptions.UseMcsMask) != 0)
 			{
 				preprocessorSymbols.Add("MCS");
 			}
@@ -361,7 +363,7 @@ public static CompilerResults CompileCSharp(string sourceFileName, CompilerOptio
 
 			var preprocessorSymbols = GetPreprocessorSymbols(flags);
 
-			if (!flags.HasFlag(CompilerOptions.UseMcs))
+			if ((flags & CompilerOptions.UseMcsMask) == 0)
 			{
 				CompilerResults results = new CompilerResults(new TempFileCollection());
 				results.PathToAssembly = outputFileName ?? Path.GetTempFileName();
@@ -476,7 +478,10 @@ public static CompilerResults CompileCSharp(string sourceFileName, CompilerOptio
 					Assert.Ignore($"Compilation with mcs ignored: test directory '{testBasePath}' needs to be checked out separately." + Environment.NewLine +
 			  $"git clone https://github.com/icsharpcode/ILSpy-tests \"{testBasePath}\"");
 				}
-				string mcsPath = Path.Combine(testBasePath, @"mcs\2.6.4\bin\gmcs.bat");
+				string mcsPath = (flags & CompilerOptions.UseMcsMask) switch {
+					CompilerOptions.UseMcs5_23 => Path.Combine(testBasePath, @"mcs\5.23\bin\mcs.bat"),
+					_ => Path.Combine(testBasePath, @"mcs\2.6.4\bin\gmcs.bat")
+				};
 				string otherOptions = " -unsafe -o" + (flags.HasFlag(CompilerOptions.Optimize) ? "+ " : "- ");
 
 				if (flags.HasFlag(CompilerOptions.Library))
@@ -544,7 +549,7 @@ internal static DecompilerSettings GetSettings(CompilerOptions cscOptions)
 			else
 			{
 				var settings = new DecompilerSettings(CSharp.LanguageVersion.CSharp5);
-				if (cscOptions.HasFlag(CompilerOptions.UseMcs))
+				if ((cscOptions & CompilerOptions.UseMcsMask) != 0)
 				{
 					// we don't recompile with mcs but with roslyn, so we can use ref locals
 					settings.UseRefLocalsForAccurateOrderOfEvaluation = true;
@@ -609,8 +614,10 @@ internal static string GetSuffix(CompilerOptions cscOptions)
 				suffix += ".roslyn3";
 			if ((cscOptions & CompilerOptions.UseRoslynLatest) != 0)
 				suffix += ".roslyn";
-			if ((cscOptions & CompilerOptions.UseMcs) != 0)
-				suffix += ".mcs";
+			if ((cscOptions & CompilerOptions.UseMcs2_6_4) != 0)
+				suffix += ".mcs2";
+			if ((cscOptions & CompilerOptions.UseMcs5_23) != 0)
+				suffix += ".mcs5";
 			return suffix;
 		}
 

ICSharpCode.Decompiler.Tests/PrettyTestRunner.cs

@@ -127,8 +127,10 @@ public void AllFilesHaveTests()
 			CompilerOptions.Optimize | CompilerOptions.UseRoslyn3_11_0,
 			CompilerOptions.UseRoslynLatest,
 			CompilerOptions.Optimize | CompilerOptions.UseRoslynLatest,
-			CompilerOptions.UseMcs,
-			CompilerOptions.Optimize | CompilerOptions.UseMcs
+			CompilerOptions.UseMcs2_6_4,
+			CompilerOptions.Optimize | CompilerOptions.UseMcs2_6_4,
+			CompilerOptions.UseMcs5_23,
+			CompilerOptions.Optimize | CompilerOptions.UseMcs5_23
 		};
 
 		[Test]