simplify exceptions for Java, .NET and Python

Author: scivision

+stdlib/+dotnet/create_symlink.m

@@ -12,8 +12,7 @@
   System.IO.File.CreateSymbolicLink(link, target);
   ok = true;
 catch e
-  dotnetException(e)
-  ok = missing;
+  ok = dotnetException(e);
 end
 
 end

+stdlib/+dotnet/disk_available.m

@@ -14,7 +14,7 @@
 % https://learn.microsoft.com/en-us/dotnet/api/system.io.driveinfo.availablefreespace
   i = uint64(i);
 catch e
-  dotnetException(e)
+  dotnetException(e);
 end
 
 end

+stdlib/+dotnet/disk_capacity.m

@@ -14,7 +14,7 @@
 % https://learn.microsoft.com/en-us/dotnet/api/system.io.driveinfo.totalsize
 i = uint64(i);
 catch e
-  dotnetException(e)
+  dotnetException(e);
 end
 
 

+stdlib/+dotnet/file_checksum.m

@@ -22,8 +22,7 @@
 
   hash = sprintf('%.2x', uint8(inst.Hash));
 catch e
-  dotnetException(e)
-  hash = missing;
+  hash = dotnetException(e);
 end
 
 fclose(fid);

+stdlib/+dotnet/filesystem_type.m

@@ -14,7 +14,7 @@
 try
   t = char(System.IO.DriveInfo(System.IO.Path.GetFullPath(file)).DriveFormat);
 catch e
-  dotnetException(e)
+  dotnetException(e);
 end
 
 end

+stdlib/+dotnet/get_owner.m

@@ -5,8 +5,6 @@
 % This is not yet possible with .NET on Unix, even with .NET 10.
 % It would require Pinvoke or external Mono.Unix
 
-o = missing;
-
 try
   ntAccountType = System.Type.GetType('System.Security.Principal.NTAccount');
 
@@ -15,14 +13,15 @@
   elseif isfile(file)
     fsec = System.IO.File.GetAccessControl(file);
   else
+    o = missing;
     return
   end
 
   owner = fsec.GetOwner(ntAccountType);
 
   o = char(owner.ToString());
 catch e
-  dotnetException(e)
+  o = dotnetException(e);
 end
 
 end

+stdlib/+dotnet/get_process_priority.m

@@ -4,8 +4,7 @@
   p = System.Diagnostics.Process.GetCurrentProcess();
   i = double(p.PriorityClass);
 catch e
-  dotnetException(e)
-  i = missing;
+  i = dotnetException(e);
 end
 
 end

+stdlib/+dotnet/get_uid.m

@@ -6,7 +6,7 @@
   try
     u = char(System.Security.Principal.WindowsIdentity.GetCurrent().User.Value);
   catch e
-    dotnetException(e)
+    dotnetException(e);
   end
 end
 

+stdlib/+dotnet/get_username.m

@@ -6,8 +6,7 @@
 try
   n = char(System.Environment.UserName);
 catch e
-  dotnetException(e)
-  n = missing;
+  n = dotnetException(e);
 end
 
 end

+stdlib/+dotnet/hostname.m

@@ -8,8 +8,7 @@
 try
   n = char(System.Net.Dns.GetHostName());
 catch e
-  dotnetException(e);
-  n = missing;
+  n = dotnetException(e);
 end
 
 % https://learn.microsoft.com/en-us/dotnet/api/system.net.dns.gethostname