mono/tests/codegen2.cs

   1 using System;
   2 using System.Reflection;
   3 using System.Reflection.Emit;
   4
   5 class CGen {
   6
   7         public static int Main() {
   8                 AssemblyBuilder abuilder;
   9                 ModuleBuilder mbuilder;
  10                 TypeBuilder tbuilder, tb2;
  11                 FieldBuilder fbuilder;
  12                 PropertyBuilder pbuilder;
  13                 ILGenerator ilg;
  14                 AssemblyName an;
  15                 String name = "tcgen.exe";
  16                 MethodBuilder get_method, entryp;
  17                 TypeAttributes attrs = TypeAttributes.Public | TypeAttributes.Class;
  18                 MethodAttributes mattrs = MethodAttributes.Public | MethodAttributes.Static;
  19
  20                 an = new AssemblyName ();
  21                 an.Name = name;
  22                 abuilder = AppDomain.CurrentDomain.DefineDynamicAssembly (an, AssemblyBuilderAccess.Save);
  23
  24                 mbuilder = abuilder.DefineDynamicModule (name, name);
  25
  26                 tbuilder = mbuilder.DefineType ("Test.CodeGen", attrs);
  27                 Type result = typeof(int);
  28                 Type[] param = new Type[] {typeof (String[])};
  29                 entryp = tbuilder.DefineMethod("Main", mattrs, result, param);
  30                 ilg = entryp.GetILGenerator (128);
  31                 ilg.DeclareLocal (typeof(int));
  32                 Label fail = ilg.DefineLabel ();
  33                 ilg.Emit (OpCodes.Ldc_I4_2);
  34                 ilg.Emit (OpCodes.Dup);
  35                 ilg.Emit (OpCodes.Add);
  36                 ilg.Emit (OpCodes.Stloc_0);
  37                 ilg.Emit (OpCodes.Ldc_I4_4);
  38                 ilg.Emit (OpCodes.Ldloc_0);
  39                 ilg.Emit (OpCodes.Sub);
  40                 ilg.Emit (OpCodes.Brfalse, fail);
  41                         ilg.Emit (OpCodes.Ldc_I4_1);
  42                         ilg.Emit (OpCodes.Ret);
  43                 ilg.MarkLabel (fail);
  44                 ilg.Emit (OpCodes.Ldc_I4_0);
  45                 ilg.Emit (OpCodes.Ret);
  46
  47
  48                 fbuilder = tbuilder.DefineField ("int_field", typeof(int), FieldAttributes.Private);
  49                 pbuilder = tbuilder.DefineProperty ("FieldI", PropertyAttributes.None, typeof(int), null);
  50                 get_method = tbuilder.DefineMethod("get_FieldI", MethodAttributes.Public, result, null);
  51                 ilg = get_method.GetILGenerator (128);
  52                 ilg.Emit (OpCodes.Ldloc_0);
  53                 ilg.Emit (OpCodes.Ldloc_0);
  54                 ilg.Emit (OpCodes.Ceq);
  55                 ilg.Emit (OpCodes.Ret);
  56                 pbuilder.SetGetMethod (get_method);
  57
  58                 Type t = tbuilder.CreateType ();
  59                 abuilder.SetEntryPoint (entryp);
  60                 abuilder.Save (name);
  61                 return 0;
  62         }
  63 }