--- parser3/src/main/execute.C	2001/02/22 16:21:49	1.22
+++ parser3/src/main/execute.C	2001/03/16 12:30:23	1.112
@@ -1,5 +1,9 @@
 /*
-  $Id: execute.C,v 1.22 2001/02/22 16:21:49 paf Exp $
+	Parser
+	Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
+	Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
+
+	$Id: execute.C,v 1.112 2001/03/16 12:30:23 paf Exp $
 */
 
 #include "pa_array.h" 
@@ -7,152 +11,721 @@
 #include "pa_request.h"
 #include "pa_vstring.h"
 #include "pa_vhash.h"
+#include "pa_vunknown.h"
+#include "pa_vcframe.h"
+#include "pa_vmframe.h"
+#include "pa_vobject.h"
+#include "pa_vdouble.h"
+#include "pa_vbool.h"
+#include "pa_vtable.h"
 
 #include <stdio.h>
+#include <string.h>
+
+#define PUSH(value) stack.push(value)
+#define POP() static_cast<Value *>(stack.pop())
+#define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
 
 
 char *opcode_name[]={
-	"STRING",  "CODE_ARRAY",
-	"WITH_ROOT",	"WITH_SELF",	"WITH_READ",	"WITH_WRITE",
-	"CONSTRUCT",
-	"EXPRESSION_EVAL",	"MODIFY_EVAL",
-	"WRITE",
+	// literals
+	"VALUE",  "CURLY_CODE__STORE_PARAM",  "EXPR_CODE__STORE_PARAM",
+
+	// actions
+	"WITH_SELF",	"WITH_ROOT",	"WITH_READ",	"WITH_WRITE",
+	"GET_CLASS",
+	"CONSTRUCT_VALUE",  "CONSTRUCT_DOUBLE",
+	"WRITE_VALUE",  "WRITE_EXPR_RESULT",  "STRING__WRITE",
 	"GET_ELEMENT",	"GET_ELEMENT__WRITE",
 	"CREATE_EWPOOL",	"REDUCE_EWPOOL",
 	"CREATE_RWPOOL",	"REDUCE_RWPOOL",
+  	"CREATE_SWPOOL",	"REDUCE_SWPOOL",
 	"GET_METHOD_FRAME",
-	"CREATE_JUNCTION",
 	"STORE_PARAM",
-	"CALL"
+	"CALL",
+
+	// expression ops: unary
+	"NEG", "INV", "NOT", "DEF", "IN", "FEXISTS",
+	// expression ops: binary
+	"SUB", "ADD", "MUL", "DIV", "MOD",
+	"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",
+	"IS"
 };
 
+void va_log_printf(const char *fmt,va_list args) {
+	vfprintf(stderr, fmt, args);
+}
+
+void log_printf(const char *fmt, ...) {
+	// TODO: êóäà-íèáóäü ïðèñòðîèòü
+    va_list args;
+    va_start(args,fmt);
+    va_log_printf(fmt,args);
+    va_end(args);
+}
+
 void dump(int level, const Array& ops) {
+	if(0){
+		int size=ops.size();
+		//log_printf("size=%d\n", size);
+		for(int i=0; i<size; i++) {
+			Operation op;
+			op.cast=ops.quick_get(i);
+			log_printf("%8X\n", op.cast);
+		}
+	}
+
 	int size=ops.size();
+	//log_printf("size=%d\n", size);
 	for(int i=0; i<size; i++) {
-		int code=reinterpret_cast<int>(ops.quick_get(i));
-		printf("%*s%s", level*4, "", opcode_name[code]);
-
-		if(code==OP_STRING) {
-			VString *vstring=static_cast<VString *>(ops.quick_get(++i));
-			printf(" \"%s\"", vstring->get_string()->cstr());
+		Operation op;
+		op.cast=ops.quick_get(i);
+		log_printf("%*s%s", level*4, "", opcode_name[op.code]);
+
+		if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
+			Value *value=static_cast<Value *>(ops.quick_get(++i));
+			log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
 		}
-		printf("\n");
+		log_printf("\n");
 
-		if(code==OP_CODE_ARRAY) {
+		if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) {
 			const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
 			dump(level+1, *local_ops);
 		}
 	}
 }
 
-void Request::execute(Array& ops) {
-	if(0) {
-		puts("---------------------------");
+void Request::execute(const Array& ops) {
+	if(1) {
+		log_printf("source----------------------------\n");
 		dump(0, ops);
-		puts("---------------------------");
+		log_printf("execution-------------------------\n");
 	}
 
 	int size=ops.size();
+	//log_printf("size=%d\n", size);
 	for(int i=0; i<size; i++) {
-		int code=reinterpret_cast<int>(ops.quick_get(i));
-		printf("%d:%s", stack.top(), opcode_name[code]);
+		Operation op;
+		op.cast=ops.quick_get(i);
+		log_printf("%d:%s", stack.top_index()+1, opcode_name[op.code]);
+
+		switch(op.code) {
+		// param in next instruction
+		case OP_VALUE:
+			{
+				Value *value=static_cast<Value *>(ops.quick_get(++i));
+				log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
+				PUSH(value);
+				break;
+			}
+		case OP_CURLY_CODE__STORE_PARAM:
+		case OP_EXPR_CODE__STORE_PARAM:
+			{
+				VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
+				// code
+				const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
+				log_printf(" (%d)\n", local_ops->size());
+				dump(1, *local_ops);
+				
+				// when they evaluate expression parameter,
+				// the object expression result
+				// does not need to be written into calling frame
+				// it must go into any expressions using that parameter
+				// hence, zeroing junction.wcontext being created
+				// later, in .process would test that field 
+				// in decision "which wwrapper to use"
+				Junction& j=*NEW Junction(pool(), 
+					*self, 0, 0,
+					root, frame, op.code==OP_EXPR_CODE__STORE_PARAM?0:frame, local_ops);
+				
+				Value *value=NEW VJunction(j);
+
+				// store param
+				frame->store_param(frame->name(), value);
+				break;
+			}
+		case OP_GET_CLASS:
+			{
+				// maybe the do ^class:method[] call, remember the fact
+				wcontext->set_somebody_entered_some_class();
+
+				const String& name=POP_NAME();
+				VClass *vclass=static_cast<VClass *>(classes().get(name));
+				if(!vclass) 
+					THROW(0,0,
+						&name,
+						": undefined class"); 
 
-		if(code==OP_CODE_ARRAY) {
-			const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
-			//dump(level+1, *local_ops);
-		}
-		
-		switch(code) {
-		case OP_WITH_WRITE: 
-			{
-				stack.push(wcontext);
+				PUSH(vclass);
 				break;
 			}
-		case OP_WITH_READ: 
+			
+		// OP_WITH
+		case OP_WITH_SELF: 
 			{
-				stack.push(rcontext);
+				PUSH(self);
 				break;
 			}
 		case OP_WITH_ROOT: 
 			{
-				stack.push(root);
+				PUSH(root);
 				break;
 			}
-		case OP_WITH_SELF: 
+		case OP_WITH_READ: 
 			{
-				stack.push(self);
+				PUSH(rcontext);
 				break;
 			}
-			
-		case OP_STRING:
+		case OP_WITH_WRITE: 
 			{
-				VString *vstring=static_cast<VString *>(ops.quick_get(++i));
-				printf(" \"%s\"", vstring->get_string()->cstr());
-				stack.push(vstring);
+				PUSH(wcontext);
 				break;
 			}
 			
-		case OP_CONSTRUCT:
+		// OTHER ACTIONS BUT WITHs
+		case OP_CONSTRUCT_VALUE:
 			{
-				Value *value=static_cast<Value *>(stack.pop());
-				VString *name=static_cast<VString *>(stack.pop());
-				Value *ncontext=static_cast<Value *>(stack.pop());
-				ncontext->put_element(*name, value);
+				Value *value=POP();
+				const String& name=POP_NAME();
+				Value *ncontext=POP();
+				ncontext->put_element(name, value);
+				value->set_name(name);
 				break;
 			}
-			
-		case OP_WRITE:
+		case OP_CONSTRUCT_EXPR:
 			{
-				Value *value=static_cast<Value *>(stack.pop());
-				wcontext->write(value);
+				Value *value=POP();
+				const String& name=POP_NAME();
+				Value *ncontext=POP();
+				ncontext->put_element(name, value->get_expr_result());
+				value->set_name(name);
+				break;
+			}
+		case OP_WRITE_VALUE:
+			{
+				Value *value=POP();
+				write_assign_lang(*value);
+				break;
+			}
+		case OP_WRITE_EXPR_RESULT:
+			{
+				Value *value=POP();
+				write_expr_result(*value->get_expr_result());
+				break;
+			}
+		case OP_STRING__WRITE:
+			{
+				VString *vstring=static_cast<VString *>(ops.quick_get(++i));
+				log_printf(" \"%s\"", vstring->string().cstr());
+				write(vstring->string());
 				break;
 			}
 			
 		case OP_GET_ELEMENT:
 			{
 				Value *value=get_element();
-				stack.push(value);
+				PUSH(value);
 				break;
 			}
 
 		case OP_GET_ELEMENT__WRITE:
 			{
 				Value *value=get_element();
-				wcontext->write(value);
+				write_assign_lang(*value);
 				break;
 			}
 
+
 		case OP_CREATE_EWPOOL:
 			{
-				stack.push(wcontext);
-				wcontext=NEW WContext(pool(), 0 /* empty */);
+				PUSH(wcontext);
+				wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
 				break;
 			}
 		case OP_REDUCE_EWPOOL:
 			{
-				Value *value=wcontext->value();
-				wcontext=static_cast<WContext *>(stack.pop());
-				stack.push(value);
+				Value *value=wcontext->result();
+				wcontext=static_cast<WContext *>(POP());
+				PUSH(value);
 				break;
 			}
 			
+		case OP_CREATE_RWPOOL:
+			{
+				Value *ncontext=POP();
+				PUSH(rcontext);
+				rcontext=ncontext;
+				PUSH(wcontext);
+				wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
+				break;
+			}
+		case OP_REDUCE_RWPOOL:
+			{
+				const String *string=wcontext->get_string();
+				Value *value;
+				if(string)
+					value=NEW VString(*string);
+				else
+					value=NEW VUnknown(pool());
+				wcontext=static_cast<WContext *>(POP());
+				rcontext=POP();
+				PUSH(value);
+				break;
+			}
+		case OP_CREATE_SWPOOL:
+			{
+				PUSH(wcontext);
+				wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
+				break;
+			}
+		case OP_REDUCE_SWPOOL:
+			{
+				// from "$a $b" part of expression taking only string value,
+				// ignoring any other content of wcontext
+				const String *string=wcontext->get_string();
+				Value *value;
+				if(string)
+					value=NEW VString(*string);
+				else
+					NEW VUnknown(pool());
+				wcontext=static_cast<WContext *>(POP());
+				PUSH(value);
+				break;
+			}
+
+		// CALL
+		case OP_GET_METHOD_FRAME:
+			{
+				Value *value=POP();
+				// info: 
+				//	code compiled so that this one's always method-junction, 
+				//	not a code-junction
+				Junction *junction=value->get_junction();
+				if(!junction)
+					THROW(0,0,
+						&value->name(),
+						"(%s) not a method or junction, can not call it",
+							value->type()); 
+
+				VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
+				frame->set_name(value->name());
+				PUSH(frame);
+				break;
+			}
+		case OP_STORE_PARAM:
+			{
+				Value *value=POP();
+				VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
+				frame->store_param(frame->name(), value);
+				break;
+			}
+
+		case OP_CALL:
+			{
+				log_printf("->\n");
+				VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
+				frame->fill_unspecified_params();
+				PUSH(self);  
+				PUSH(root);  
+				PUSH(rcontext);  
+				PUSH(wcontext); 
+				
+				VStateless_class *called_class=frame->junction.self.get_class();
+				// is context object or class & is it my class or my parent's class?
+				VStateless_class *read_class=rcontext->get_class();
+				if(read_class && read_class->is_or_derived_from(*called_class)) // yes
+					self=rcontext; // class dynamic call
+				else // no, not me or relative of mine (total stranger)
+					if(
+						wcontext->constructing() && // constructing?
+						wcontext->somebody_entered_some_class()) { // ^class:method[..]?
+						// 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, 
+							String::Untaint_lang::NO  // not used, always an object, not string
+						);
+					} else 
+						self=&frame->junction.self; // no, static or simple dynamic call
+
+				frame->set_self(*self);
+				root=rcontext=wcontext=frame;
+				{
+					// take object or class from any wrappers
+					// 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?
+						method.check_actual_numbered_params(
+							frame->name(), frame->numbered_params());
+						(*method.native_code)(*this, 
+							frame->name(), frame->numbered_params()); // execute it
+					} else // parser code
+						execute(*method.parser_code); // execute it
+				}
+				Value *value=wcontext->result();
+
+				wcontext=static_cast<WContext *>(POP());  
+				rcontext=POP();  
+				root=POP();  
+				self=static_cast<VAliased *>(POP());
+
+				PUSH(value);
+				log_printf("<-returned");
+				break;
+			}
+
+		// expression ops: unary
+		case OP_NEG:
+			{
+				Value *operand=POP();
+				Value *value=NEW VDouble(pool(), -operand->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_INV:
+			{
+				Value *operand=POP();
+				Value *value=NEW VDouble(pool(), ~(int)operand->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_NOT:
+			{
+				Value *operand=POP();
+				Value *value=NEW VBool(pool(), !operand->get_bool());
+				PUSH(value);
+				break;
+			}
+		case OP_DEF:
+			{
+				Value *operand=POP();
+				Value *value=NEW VBool(pool(), operand->get_defined());
+				PUSH(value);
+				break;
+			}
+		case OP_IN:
+			{
+				Value *operand=POP();
+				const char *path=operand->as_string().cstr();
+				Value *value=NEW VBool(pool(), strcmp(path, info.uri)<=0);
+				PUSH(value);
+				break;
+			}
+		case OP_FEXISTS:
+			{
+				Value *operand=POP();
+				Value *value=NEW VBool(pool(), true/*TODO*/);
+				PUSH(value);
+				break;
+			}
+
+		// expression ops: binary
+		case OP_SUB: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VDouble(pool(), a->get_double() - b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_ADD: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VDouble(pool(), a->get_double() + b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_MUL: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VDouble(pool(), a->get_double() * b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_DIV: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VDouble(pool(), a->get_double() / b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_MOD: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VDouble(pool(), 
+					(int)a->get_double() %
+					(int)b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_BIN_AND:
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VDouble(pool(), 
+					(int)a->get_double() &
+					(int)b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_BIN_OR:
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VDouble(pool(), 
+					(int)a->get_double() |
+					(int)b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_BIN_XOR:
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VDouble(pool(), 
+					(int)a->get_double() ^
+					(int)b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_LOG_AND:
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->get_bool() && b->get_bool());
+				PUSH(value);
+				break;
+			}
+		case OP_LOG_OR:
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->get_bool() || b->get_bool());
+				PUSH(value);
+				break;
+			}
+		case OP_LOG_XOR:
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->get_bool() ^ b->get_bool());
+				PUSH(value);
+				break;
+			}
+		case OP_NUM_LT: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->get_double() < b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_NUM_GT: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->get_double() > b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_NUM_LE: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->get_double() <= b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_NUM_GE: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->get_double() >= b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_NUM_EQ: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->get_double() == b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_NUM_NE: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->get_double() != b->get_double());
+				PUSH(value);
+				break;
+			}
+		case OP_STR_LT: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
+				PUSH(value);
+				break;
+			}
+		case OP_STR_GT: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
+				PUSH(value);
+				break;
+			}
+		case OP_STR_LE: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
+				PUSH(value);
+				break;
+			}
+		case OP_STR_GE: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
+				PUSH(value);
+				break;
+			}
+		case OP_STR_EQ: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
+				PUSH(value);
+				break;
+			}
+		case OP_STR_NE: 
+			{
+				Value *b=POP();  Value *a=POP();
+				Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
+				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:
-			printf("\tTODO");
-			break;
+			THROW(0,0,
+				0,
+				"unhandled '%s' opcode", opcode_name[op.code]); 
 		}
-		printf("\n");
+		log_printf("\n");
 	}
 }
 
 Value *Request::get_element() {
-	VString *name=static_cast<VString *>(stack.pop());
-	Value *ncontext=static_cast<Value *>(stack.pop());
-	Value *value=ncontext->get_element(*name); // name áûâàåò method, òîãäà âûäà¸ò new junction(ÀÂÒÎÂÛ×ÈÑËßÒÜ=false, root,self,rcontext,wcontext,code)
-	// name áûâàåò èìÿ junction, òîãäà èëè îñòàâëÿåò â ïîêîå, èëè âû÷èñëÿåò â çàâèñèìîñòè îò ôëàãà ÀÂÒÎÂÛ×ÈÑËßÒÜ
-
-	if(!value) {
-		value=NEW VHash(pool());
-		ncontext->put_element(*name, value);
+	const String& name=POP_NAME();
+	Value *ncontext=POP();
+	Value *value=ncontext->get_element(name);
+
+	if(value)
+		value=&process(*value, &name); // process possible code-junction
+	else {
+		value=NEW VUnknown(pool());
+		value->set_name(name);
 	}
+
 	return value;
-}
\ No newline at end of file
+}
+
+Value& Request::process(Value& value, const String *name, bool intercept_string) {
+	// intercept_string:
+	//	true:
+	//		they want result=string value, 
+	//		possible object result goes to wcontext
+	//	false:
+	//		they want any result[string|object]
+	//		nothing goes to wcontext.
+	//		used in (expression) params evaluation
+
+	Value *result;
+	Junction *junction=value.get_junction();
+	if(junction && junction->code) { // is it a code-junction?
+		// process it
+		log_printf("ja->\n");
+		PUSH(self);  
+		PUSH(root);  
+		PUSH(rcontext);  
+		PUSH(wcontext);
+		
+		WContext *frame;
+		// for expression method params
+		// wcontext is set 0
+		// using the fact in decision "which wwrapper to use"
+		bool using_code_frame=intercept_string && junction->wcontext;
+		if(using_code_frame) {
+			// almost plain wwrapper about junction wcontext, 
+			// BUT intercepts string writes
+			frame=NEW VCodeFrame(pool(), *junction->wcontext);  
+		} else {
+			// plain wwrapper
+			frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
+		}
+		
+		wcontext=frame;
+		self=&junction->self;
+		root=junction->root;
+		rcontext=junction->rcontext;
+		execute(*junction->code);
+		if(using_code_frame) {
+			// CodeFrame soul:
+			//   string writes were intercepted
+			//   returning them as the result of getting code-junction
+			result=NEW VString(*frame->get_string());
+		} else 
+			result=frame->result();
+		
+		wcontext=static_cast<WContext *>(POP());  
+		rcontext=POP();  
+		root=POP();  
+		self=static_cast<VAliased *>(POP());
+		
+		log_printf("<-ja returned");
+	} else
+		result=&value;
+
+	if(name)
+		result->set_name(*name);
+	return *result;
+}
+
+char *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
+	PUSH(self);  
+	PUSH(root);  
+	PUSH(rcontext);  
+	PUSH(wcontext);
+	
+	// initialize contexts
+	root=rcontext=self=&aself;
+	wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
+	
+	// execute!	
+	execute(*method.parser_code);
+	
+	// result
+	char *result;
+	if(return_cstr)
+		result=wcontext->get_string()->cstr(); // chars
+	else
+		result=0; // ignore result
+	
+	wcontext=static_cast<WContext *>(POP());  
+	rcontext=POP();  
+	root=POP();  
+	self=static_cast<VAliased *>(POP());
+	
+	// return
+	return result;
+}
+
+char *Request::execute_method(Value& aself, 
+							  const String& method_name, bool return_cstr) {
+	if(Value *value=aself.get_element(method_name))
+		if(Junction *junction=value->get_junction())
+			if(const Method *method=junction->method) 
+				return execute_method(aself, *method, return_cstr);
+
+	return 0;
+}