anchor.diff:  and private generateBody (typeBuilder : TypeBuilder) (ilGen : ILGenerator) (body : SExp list) (contextVar : LocalBuilder) =
       match body with
       | [] ->
  +        // TODO: return empty list.
           ()
       | [last] ->
           // TODO: return last expression.
  
positive.code:     ilGen.Emit(OpCodes.Newobj, constructorInfo)
      
      ilGen.Emit(OpCodes.Stloc, contextVariable)
      // TODO: Emit Runtime.Load(context) here.
      
      contextVariable
  
  
negative.code: 
  open Naggum.Context
  open Naggum.Reader
  open Naggum.Runtime
  open Naggum.Types
  
  /// Returns local variable for Context object.
  