C# (CSharp) TypeGen.DefineMethodOverride示例

        private static void EmitOverrideGetHashCode(TypeGen typeGen)
        {
            Type       baseType   = typeGen.TypeBuilder.BaseType;
            MethodInfo baseMethod = baseType.GetMethod("GetHashCode", Type.EmptyTypes);
            Compiler   cg         = typeGen.DefineMethodOverride(baseMethod);

            // Check if a "hash" method exists on this class
            cg.EmitType(typeGen.TypeBuilder);
            cg.EmitString("hash");
            cg.EmitCall(typeof(RubyOps).GetMethod("ResolveDeclaredInstanceMethod"));
            Label callBase = cg.DefineLabel();

            cg.Emit(OpCodes.Brfalse_S, callBase);

            // If so, call it
            cg.EmitThis();
            cg.EmitCall(typeof(RubyOps).GetMethod("CallHash"));
            cg.EmitReturn();

            // Otherwise, call base class
            cg.MarkLabel(callBase);
            cg.EmitThis();
            cg.Emit(OpCodes.Call, baseMethod); // base call must be non-virtual
            cg.EmitReturn();

            cg.Finish();
        }

示例#2

显示文件

文件： RubyTypeBuilder.cs 项目： gaybro8777/ironruby

        // we need to get the right execution context
#if OBSOLETE
        private static void EmitOverrideEquals(TypeGen typeGen)
        {
            Type       baseType   = typeGen.TypeBuilder.BaseType;
            MethodInfo baseMethod = baseType.GetMethod("Equals", new Type[] { typeof(object) });
            Compiler   cg         = typeGen.DefineMethodOverride(baseMethod);

            // Check if an "eql?" method exists on this class
            cg.EmitType(typeGen.TypeBuilder);
            cg.EmitString("eql?");
            cg.EmitCall(typeof(RubyOps).GetMethod("ResolveDeclaredInstanceMethod"));
            Label callBase = cg.DefineLabel();

            cg.Emit(OpCodes.Brfalse_S, callBase);

            // If so, call it
            cg.EmitThis();
            cg.EmitArgGet(0);
            cg.EmitCall(typeof(RubyOps).GetMethod("CallEql"));
            cg.EmitReturn();

            // Otherwise, call base class
            cg.MarkLabel(callBase);
            cg.EmitThis();
            cg.EmitArgGet(0);
            cg.Emit(OpCodes.Call, baseMethod); // base call must be non-virtual
            cg.EmitReturn();

            cg.Finish();
        }