ILSpy Plugin corrections/enhancements

[Fabrice]

Hi,
I open a new discussion here that is related to my ILSpy plugin.
If you find an issue in the generated code, please reply here with a sample.

Thanks,
Fab

[lagraf]

Hi Fabrice,
if I translate the following C# Code with your plugin

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public class Program
{
	static void Main()
	{
		System.Console.WriteLine("Hello XIDE from c#!");
	}
}

it says (ignore the "e" we already talked about)

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PUBLIC CLASS Program
	PRIVATE STATIC METHOD Main() AS VOID
		Console.WriteLine("e""Hello XIDE from c#!")
END CLASS

When I compile the X# Code I get the error "error XS1558: 'Functions' does not have a suitable static 'Start' function". Do I always need a start function in X# or why is this start Class/Method not accepted?

[robert]

Franz,
X# has chosen to use the Start function instead of the Main method as entry point.
If you change the code to

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public class Program
	private static method Start() as void
		Console.WriteLine("e""Hello XIDE from c#!")
end class

then you can tell the compiler to use the Program class for the entry point.
In Visual Studio this can be done on the Application page of the Project properties:

props.png (4.73 KiB) Viewed 481 times

This sets the compiler option -main: https://www.xsharp.eu/help/opt-main.html

Robert

[lagraf]

C#

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foreach (var readerName in readerNames) {
   ...
}

Translation

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LOCAL @@array AS STRING[]
@@array := readerNames
FOREACH AS STRING IN @@array 
NEXT

a little bit complicated and readerName missing in FOREACH, why not directly using array readerNames instead of @@array?

[lagraf]

Hi Robert,
thank you for info, I changed the code and putted the switch "-main:Program" to Properties/Compiler/Additional Switches in XIDE and it compiled without error.

[lagraf]

C#

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using System;
public class Program
{
   static void Main()
   {
      int[] arr = {1,2,3};
      foreach (var val in arr) {
         int i = 1;
         if (i == 1) {
            Console.WriteLine("if");
         } else {
            Console.WriteLine("else");
            Console.WriteLine("else");
         }
      }
   }
}

Translation to X#

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using System
public class Program
	private static method Main() as void
		local arr as Long[]
		local @@array as Long[]
		local i as Long
		//
		arr := <Long>;
			{1,;
			2,;
			3;
			}
		@@array := arr
		foreach as Long in @@array 
			i := 1
			if i == 1
				Console.WriteLine("e""if")
				continueendif
			Console.WriteLine("e""else")
			Console.WriteLine("e""else")
		next
end class

Else is lost, what means "continueendif"?
If I do if ... else outside of foreach it translates ok.
You also see the @@array translation of the former noted posting.

[Fabrice]

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LOCAL @@array AS STRING[]
@@array := readerNames
FOREACH AS STRING IN @@array 
NEXT

This is an exemple of the difference between the code you write, and the compiler generated code.
I could try to handle it, catching all FOREACH and rebuilding/guessing what was the original code.

[Fabrice]

Else is lost, what means "continueendif"?

The "continueendif" is a Plugin error, we are missing a newline between continue and endif; and continue is a C# keyword that translate to a LOOP in X#, that will jump back to the nearest FOR/FOREACH/WHILE/... so there, no need for the ELSE clause as in the IF we are jumping back on top.

[lagraf]

Fabrice,
1) FOREACH

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LOCAL @@array AS STRING[]
@@array := readerNames
FOREACH AS STRING IN @@array 
NEXT

The @@array is waste but not the problem, foreach has lost readerName where each @@array entry is shown, something like

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FOREACH readerName AS STRING IN @@array 

2) CONTINUEENDIF
if ... else ... endif is not the same like if ... loop ... endif when statements behind the endif, so I testet this and it translates right!

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foreach as Long in @@array 
	i := 1
	if i == 1
		 Console.WriteLine("e""if")
        else
                 Console.WriteLine("e""else")
                 Console.WriteLine("e""else")
        endif
        Console.WriteLine("ever")
next

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@@array := arr
foreach as Long in @@array 
	i := 1
	if i == 1
		Console.WriteLine("e""if")
	else
		Console.WriteLine("e""else")
		Console.WriteLine("e""else")
	endif
	Console.WriteLine("e""ever")
next

[Fabrice]

Hi Franz,

I have updated the ILSpy plugin :
The LOOP keyword is now generated instead of "continue"
The variable declaration in FOREACH has been corrected
Same for the "e"scaped String.

Go to the github page : https://github.com/X-Sharp/ILSpy-Plugin
On the right, you can get the latest ILSpy plugin, dated today 2022/04/21
I have also included a version for the latest V7.2.1 version of ILSpy.

Regards,
Fab