--- parser3/src/main/execute.C	2001/03/13 13:43:30	1.100
+++ parser3/src/main/execute.C	2001/03/13 14:28:51	1.103
@@ -3,7 +3,7 @@
 	Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
 	Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
 
-	$Id: execute.C,v 1.100 2001/03/13 13:43:30 paf Exp $
+	$Id: execute.C,v 1.103 2001/03/13 14:28:51 paf Exp $
 */
 
 #include "pa_array.h" 
@@ -50,7 +50,8 @@ char *opcode_name[]={
 	"BIN_AND", "BIN_OR", "BIN_XOR",
 	"LOG_AND", "LOG_OR", "LOG_XOR",
 	"NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
-	"STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE"
+	"STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
+	"IS"
 };
 
 void dump(int level, const Array& ops) {
@@ -317,6 +318,8 @@ void Request::execute(const Array& ops)
 						// yes, this is a constructor call
 						if(called_class->name()==TABLE_CLASS_NAME)
 							self=NEW VTable(pool());
+						else if(called_class->name()==ENV_CLASS_NAME)
+							self=NEW VEnv(pool());
 						else
 							self=NEW VObject(pool(), *called_class);
 						frame->write(*self, 
@@ -329,9 +332,8 @@ void Request::execute(const Array& ops)
 				root=rcontext=wcontext=frame;
 				{
 					// take object or class from any wrappers
-					VAliased *aliased=self->get_aliased();
-					// substitute class alias to the class they are called AS
-					Temp_alias temp_alias(*aliased, *frame->junction.vclass);
+					// and substitute class alias to the class they are called AS
+					Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
 
 					const Method& method=*frame->junction.method;
 					if(method.native_code) { // native code?
@@ -568,6 +570,13 @@ void Request::execute(const Array& ops)
 				PUSH(value);
 				break;
 			}
+		case OP_IS:
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), b->as_string() == a->type());
+				PUSH(value);
+				break;
+			}
 
 		default:
 			THROW(0,0,