Finnland Posts - Answer Overflow

Finnland

•Created by Finnland on 11/13/2023 in #help

I cant figure out constructor inheritance

how do i inherit classes, including their constructors? no matter what i try i get a wide variety of different errors. i have tried just:

public class SubClass : Superclass {
  
}

public class SubClass : Superclass {
  
}

but then i get the error

'SuperClass' does not contain a constructor that takes 0 arguments

'SuperClass' does not contain a constructor that takes 0 arguments

so then i tried adding

public class SubClass : Superclass {
  public SubClass(arg) : base(arg)
  {
    
  }
}

public class SubClass : Superclass {
  public SubClass(arg) : base(arg)
  {
    
  }
}

but that gives me an error that i need a method body. How do i inherit the constructors in addition to the rest of the class?

6 replies

CC#

•Created by Finnland on 11/3/2023 in #help

❔ how do i print the bytecode generated from a ILGenerator? (im getting an error)

i am trying to generate and print csharp bytecode using ILGenerator and AssemblyBuilder, ModeuleBuilder, etc, but when i try to get my bytecode using the code below, i get the following error:

'System.InvalidOperationException' occurred in System.Private.CoreLib.dll: 'Operation is not valid due to the current state of the object.'

'System.InvalidOperationException' occurred in System.Private.CoreLib.dll: 'Operation is not valid due to the current state of the object.'

my code:

AssemblyName assemblyName = new AssemblyName("CSharpBytecode");
AssemblyBuilder assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);

ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule("CSharpBytecode");
TypeBuilder typeBuilder = moduleBuilder.DefineType("CSharpBytecode", TypeAttributes.Public);
MethodBuilder methodBuilder = typeBuilder.DefineMethod("MyMethod", MethodAttributes.Public);

ILGenerator ilGenerator = methodBuilder.GetILGenerator();

ilGenerator.Emit(OpCodes.Ldstr, "Hello, world!");
ilGenerator.Emit(OpCodes.Ret);

byte[] methodBody = methodBuilder.GetMethodBody().GetILAsByteArray(); // this errors

AssemblyName assemblyName = new AssemblyName("CSharpBytecode");
AssemblyBuilder assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);

ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule("CSharpBytecode");
TypeBuilder typeBuilder = moduleBuilder.DefineType("CSharpBytecode", TypeAttributes.Public);
MethodBuilder methodBuilder = typeBuilder.DefineMethod("MyMethod", MethodAttributes.Public);

ILGenerator ilGenerator = methodBuilder.GetILGenerator();

ilGenerator.Emit(OpCodes.Ldstr, "Hello, world!");
ilGenerator.Emit(OpCodes.Ret);

byte[] methodBody = methodBuilder.GetMethodBody().GetILAsByteArray(); // this errors

PS, i have no clue if this is beginner, intermediate, or advanced (and im likely in way over my head here)

19 replies

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