Enable SA1129 and fix noncompliance (except in Cores)

calling implicit default struct ctor

Common.ruleset

@@ -414,7 +414,7 @@
 		<Rule Id="SA1128" Action="Hidden" />
 
 		<!-- Do not use default value type constructor -->
-		<Rule Id="SA1129" Action="Hidden" />
+		<Rule Id="SA1129" Action="Error" />
 
 		<!-- Use readable conditions -->
 		<Rule Id="SA1131" Action="Hidden" />

src/BizHawk.BizInvoke/BizInvoker.cs

@@ -269,7 +269,7 @@ namespace BizHawk.BizInvoke
 
 			var il = method.GetILGenerator();
 
-			Label exc = new Label();
+			Label exc = default;
 			if (monitorField != null) // monitor: enter and then begin try
 			{
 				il.Emit(OpCodes.Ldarg_0);
@@ -376,7 +376,7 @@ namespace BizHawk.BizInvoke
 
 			var il = method.GetILGenerator();
 
-			Label exc = new Label();
+			Label exc = default;
 			if (monitorField != null) // monitor: enter and then begin try
 			{
 				il.Emit(OpCodes.Ldarg_0);

src/BizHawk.Bizware.BizwareGL/math/Matrix4.cs

@@ -165,7 +165,7 @@ namespace BizHawk.Bizware.BizwareGL
 				var pFlIn = (float*) pMatIn;
 				for (var i = 0; i < 16; i++) pDbTemp[i] = pFlIn[i];
 			}
-			Matrix4 result = new();
+			Matrix4 result = default;
 			ref var refResult = ref result;
 			fixed (Matrix4* pMatOut = &refResult)
 			{

src/BizHawk.Bizware.DirectX/GamePad360.cs

@@ -140,7 +140,7 @@ namespace BizHawk.Bizware.DirectX
 
 			if (XInputGetStateExProc != null)
 			{
-				_state = new XINPUT_STATE();
+				_state = default;
 				XInputGetStateExProc(_index0, out _state);
 			}
 			else

src/BizHawk.Client.EmuHawk/AVOut/AviWriter.cs

@@ -1,4 +1,5 @@
 #if AVI_SUPPORT
+#pragma warning disable SA1129
 using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;

src/BizHawk.Client.EmuHawk/MainForm.cs

@@ -4832,6 +4832,6 @@ namespace BizHawk.Client.EmuHawk
 			LoadRom(args[0]);
 		}
 
-		public IQuickBmpFile QuickBmpFile { get; } = new QuickBmpFile();
+		public IQuickBmpFile QuickBmpFile { get; } = EmuHawk.QuickBmpFile.INSTANCE;
 	}
 }

src/BizHawk.Client.EmuHawk/QuickBmpFile.cs

@@ -332,6 +332,8 @@ namespace BizHawk.Client.EmuHawk
 			s.Write(dst, 0, dst.Length);
 		}
 
+		public static readonly QuickBmpFile INSTANCE = default;
+
 		readonly void IQuickBmpFile.Copy(IVideoProvider src, IVideoProvider dst) => Copy(src, dst);
 
 		readonly bool IQuickBmpFile.Load(IVideoProvider v, Stream s) => Load(v, s);

src/BizHawk.Client.EmuHawk/tools/Lua/Libraries/TAStudioLuaLibrary.cs

@@ -178,7 +178,7 @@ namespace BizHawk.Client.EmuHawk
 			{
 				if (frame >= 0)
 				{
-					PendingChanges newChange = new PendingChanges();
+					PendingChanges newChange = default;
 
 					if (frame < Tastudio.CurrentTasMovie.InputLogLength)
 					{
@@ -215,7 +215,7 @@ namespace BizHawk.Client.EmuHawk
 			{
 				if (frame >= 0)
 				{
-					PendingChanges newChange = new PendingChanges();
+					PendingChanges newChange = default;
 
 					if (frame < Tastudio.CurrentTasMovie.InputLogLength)
 					{

src/BizHawk.Client.EmuHawk/tools/NES/NESMusicRipper.cs

@@ -166,9 +166,12 @@ namespace BizHawk.Client.EmuHawk
 
 						var rec = _log[index];
 
-						PulseState pulse = new PulseState();
-						if (track == 0) pulse = rec.Pulse0;
-						if (track == 1) pulse = rec.Pulse1;
+						var pulse = track switch
+						{
+							0 => rec.Pulse0,
+							1 => rec.Pulse1,
+							_ => default
+						};
 
 						// transform quieted notes to dead notes
 						// blech its buggy, im tired

src/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj

@@ -5,7 +5,7 @@
 	<Import Project="../MainSlnCommon.props" />
 	<PropertyGroup>
 		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-		<NoWarn>$(NoWarn);CA1806;CA1825;CA2214;SA1100;SA1120;SA1137;SA1205;SA1208;SA1400</NoWarn>
+		<NoWarn>$(NoWarn);CA1806;CA1825;CA2214;SA1100;SA1120;SA1129;SA1137;SA1205;SA1208;SA1400</NoWarn>
 		<Nullable>disable</Nullable>
 	</PropertyGroup>
 	<ItemGroup>

src/BizHawk.Emulation.DiscSystem/Disc.cs

@@ -120,7 +120,7 @@ namespace BizHawk.Emulation.DiscSystem
 		/// <summary>
 		/// Parameters set during disc loading which can be referenced by the sector synthesizers
 		/// </summary>
-		internal SectorSynthParams SynthParams = new SectorSynthParams();
+		internal SectorSynthParams SynthParams = default;
 
 		/// <summary>
 		/// Forbid public construction

src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Load.cs

@@ -160,7 +160,7 @@ namespace BizHawk.Emulation.DiscSystem.CUE
 
 		private void EmitRawTOCEntry(CompiledCueTrack cct)
 		{
-			SubchannelQ toc_sq = new SubchannelQ();
+			SubchannelQ toc_sq = default;
 			//absent some kind of policy for how to set it, this is a safe assumption:
 			byte toc_ADR = 1;
 			toc_sq.SetStatus(toc_ADR, (EControlQ)(int)cct.Flags);

src/BizHawk.Emulation.DiscSystem/Internal/Jobs/Synthesize_A0A1A2_Job.cs

@@ -42,7 +42,7 @@ namespace BizHawk.Emulation.DiscSystem
 			//NOTE: entries are inserted at the beginning due to observations of CCD indicating they might need to be that way
 			//Since I'm being asked to synthesize them here, I guess I can put them in whatever order I want, can't I?
 
-			SubchannelQ sq = new SubchannelQ();
+			SubchannelQ sq = default;
 
 			//ADR (q-Mode) is necessarily 0x01 for a RawTOCEntry
 			const int kADR = 1;

src/BizHawk.Emulation.DiscSystem/Internal/Jobs/Synthesize_Leadout_Job.cs

@@ -37,7 +37,7 @@ namespace BizHawk.Emulation.DiscSystem
 			{
 				//var se = new SectorEntry(sz);
 				//Disc.Sectors.Add(se);
-				SubchannelQ sq = new SubchannelQ();
+				SubchannelQ sq = default;
 
 				int track_relative_msf = i;
 				sq.min = BCD2.FromDecimal(new Timestamp(track_relative_msf).MIN);

src/BizHawk.Emulation.DiscSystem/Internal/SectorSynth.cs

@@ -239,7 +239,7 @@ namespace BizHawk.Emulation.DiscSystem
 //			else if(toc.disc_type == DISC_TYPE_CD_I) control |= 0x4;
 			control |= (EControlQ)(((int)ses.LastInformationTrack.Control) & 4);
 			
-			SubchannelQ sq = new SubchannelQ();
+			SubchannelQ sq = default;
 			sq.SetStatus(ADR, control);
 			sq.q_tno.BCDValue = 0xAA;
 			sq.q_index.BCDValue = 0x01;