[Discussion] Using ldftn and calli to call X# methods from managed code #73

I think it would be interesting to call X# methods from IL (C#) using ldftn/calli. The assembler plug would be replaced with managed code, which means better portability.

Example

public static void SendNumber(int number)
{
	ldarg.0
    ldftn
	calli
}

[XSharpMethod("DebugStub_SendSimpleNumber")]
private static void DoSendNumber(int number);

We just need to handle the attribute in ldftn, where we just emit push label.

Possible issues

• In the debug stub assembler plugs, we currently ifdef the calls, because the debug stub may be disabled (i.e. it's not emitted), so we need to handle that somehow.
• Calling conventions.