--- parser3/src/classes/reflection.C	2013/03/14 03:14:42	1.29
+++ parser3/src/classes/reflection.C	2016/10/11 21:30:16	1.63
@@ -1,31 +1,33 @@
 /** @file
 	Parser: @b reflection parser class.
 
-	Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com)
+	Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com)
 	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
 */
 
 #include "pa_vmethod_frame.h"
 #include "pa_request.h"
 #include "pa_vbool.h"
+#include "pa_vobject.h"
 
-volatile const char * IDENT_REFLECTION_C="$Id: reflection.C,v 1.29 2013/03/14 03:14:42 misha Exp $";
+volatile const char * IDENT_REFLECTION_C="$Id: reflection.C,v 1.63 2016/10/11 21:30:16 moko Exp $";
 
 static const String class_type_methoded("methoded");
 
 static const String method_type_native("native");
 static const String method_type_parser("parser");
 
+static const String method_name("name");
 static const String method_call_type("call_type");
 static const String method_inherited("inherited");
 static const String method_overridden("overridden");
-static const String method_call_type_static("static");
-static const String method_call_type_dynamic("dynamic");
 
 static const String method_min_params("min_params");
 static const String method_max_params("max_params");
 static const String method_extra_param("extra_param");
 
+static const String def_class("class");
+
 // class
 
 class MReflection: public Methoded {
@@ -35,28 +37,23 @@ public:
 
 // global variable
 
-DECLARE_CLASS_VAR(reflection, new MReflection, 0);
+DECLARE_CLASS_VAR(reflection, new MReflection);
 
 // methods
 
 
 static void _create(Request& r, MethodParams& params) {
 	const String& class_name=params.as_string(0, "class_name must be string");
-	Value* class_value=r.get_class(class_name);
+	VStateless_class* vclass=r.get_class(class_name);
 
-	if(!class_value)
-		throw Exception(PARSER_RUNTIME,
-			&class_name,
-			"class is undefined");
+	if(!vclass)
+		throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
 
 	const String& constructor_name=params.as_string(1, "constructor_name must be string");
-	Value* constructor_value=class_value->get_element(constructor_name);
+	Value* constructor_value=vclass->get_element(constructor_name);
 
 	if(!constructor_value || !constructor_value->get_junction())
-		throw Exception(PARSER_RUNTIME,
-			&constructor_name,
-			"constructor must be declared in class '%s'",
-			class_value->get_class()->name_cstr());
+		throw Exception(PARSER_RUNTIME, &constructor_name, "constructor must be declared in class '%s'", vclass->type());
 
 	Junction* junction=constructor_value->get_junction();
 	const Method* method=junction->method;
@@ -68,16 +65,14 @@ static void _create(Request& r, MethodPa
 		if(method->call_type==Method::CT_STATIC)
 			throw Exception(PARSER_RUNTIME,
 				&constructor_name,
-				"native method of class '%s' (%s) is not allowed to be called dynamically",
-				class_value->get_class()->name_cstr(),
-				class_value->type());
+				"native method of class '%s' is not allowed to be called dynamically",
+				vclass->type());
 
 		if(nparams<method->min_numbered_params_count)
 			throw Exception(PARSER_RUNTIME,
 				&constructor_name,
-				"native method of class '%s' (%s) accepts minimum %d parameter(s) (%d passed)",
-				class_value->get_class()->name_cstr(),
-				class_value->type(),
+				"native method of class '%s' accepts minimum %d parameter(s) (%d passed)",
+				vclass->type(),
 				method->min_numbered_params_count,
 				nparams);
 
@@ -89,142 +84,169 @@ static void _create(Request& r, MethodPa
 	if(nparams>max_params_count)
 		throw Exception(PARSER_RUNTIME,
 			&constructor_name,
-			"method of class '%s' (%s) accepts maximum %d parameter(s) (%d passed)",
-			class_value->get_class()->name_cstr(),
-			class_value->type(),
+			"method of class '%s' accepts maximum %d parameter(s) (%d passed)",
+			vclass->type(),
 			max_params_count,
 			nparams);
 
-	Value &object = r.construct(*class_value, *method);
+	Value &object = r.construct(*vclass, *method);
 	VConstructorFrame frame(*method, r.get_method_frame(), object);
 
 	Value* v[100];
 	if(nparams>0){
 		for(int i=0; i<nparams; i++)
-			v[i]=&r.process_to_value(params[i+2]);
+			v[i]=&r.process(params[i+2]);
 		frame.store_params((Value**)&v, nparams);
 	} else {
 		frame.empty_params();
 	}
-	r.op_call(frame);
+	r.call(frame);
 	object.enable_default_setter();
 	r.write_pass_lang(frame.result());
 }
 
 
-static void store_vlass_info(
-		HashStringValue::key_type key, 
-		HashStringValue::value_type value,
-		HashStringValue* result
-){
-	Value* v;
-	if(value->get_class())
-		v=new VString(class_type_methoded);
-	else
-		v=VVoid::get();
-	result->put(key, v);
-}
-
 static void _classes(Request& r, MethodParams&) {
 	VHash& result=*new VHash;
-	r.classes().for_each(store_vlass_info, result.get_hash());
+	for(HashString<VStateless_class*>::Iterator i(r.classes()); i; i.next()){
+		result.hash().put(i.key(), i.value()->get_methods().count()>0 ? new VString(class_type_methoded) : VVoid::get() );
+	}
 	r.write_no_lang(result);
 }
 
 
-static Value* get_class(Value* value){
-	if(VStateless_class* result=value->get_class())
-		return result;
-	else
-		// classes with fields only, like env & console
+static Value& get_class(Value& value){
+	if(VStateless_class* result=value.get_class())
+		return *result;
+	else {
+		// we can't return code junction to outside as it's stack value
+		if(Junction *j=value.get_junction())
+			if(j->code)
+				throw Exception(PARSER_RUNTIME, 0, "param must not be code junction");
+		// method junction
 		return value;
+	}
 }
 
-static const String* get_class_name(Value* value){
-	if(VStateless_class* lclass=value->get_class())
-		return &lclass->name();
-	else
-		// classes with fields only, like env & console
-		return new String(value->type());
+static const String& get_class_name(Value& value){
+	return *new String(get_class(value).type());
 }
 
 
 static void _class(Request& r, MethodParams& params) {
-	r.write_no_lang(*get_class(&params[0]));
+	r.write_no_lang(get_class(params[0]));
 }
 
 
 static void _class_name(Request& r, MethodParams& params) {
-	r.write_no_lang(*get_class_name(&params[0]));
+	r.write_no_lang(get_class_name(params[0]));
 }
 
+static void _class_by_name(Request& r, MethodParams& params) {
+	const String& class_name=params.as_string(0, "class_name must be string");
+	Value* class_value=r.get_class(class_name);
+	if(!class_value)
+		throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
+	r.write_no_lang(*class_value);
+}
 
 static void _base(Request& r, MethodParams& params) {
-	if(VStateless_class* lclass=params[0].get_class())
-		if(Value* base=lclass->base()){
-			r.write_no_lang(*get_class(base));
+	if(VStateless_class* vclass=params[0].get_class())
+		if(Value* base=vclass->base()){
+			r.write_no_lang(get_class(*base));
 			return;
 		}
 
 	// classes with fields only, like env & console or without base
-	r.write_no_lang(*VVoid::get());
+	r.write_value(*VVoid::get());
 }
 
 
 static void _base_name(Request& r, MethodParams& params) {
-	if(VStateless_class* lclass=params[0].get_class())
-		if(Value* base=lclass->base())
-			r.write_no_lang(*get_class_name(base));
+	if(VStateless_class* vclass=params[0].get_class())
+		if(Value* base=vclass->base())
+			r.write_no_lang(get_class_name(*base));
 }
 
-static void store_method_info(
-		HashStringMethod::key_type key, 
-		HashStringMethod::value_type method,
-		HashStringValue* result
-) {
-	result->put(key, new VString(method->native_code?method_type_native:method_type_parser));
+static void _def(Request& r, MethodParams& params) {
+	const String& type=params.as_string(0, "type must be string");
+	if(type == def_class) {
+		const String& name=params.as_string(1, "name must be string");
+		// can't use get_class because it will call @autouse[] if the class wasn't loaded
+		r.write_no_lang(VBool::get(r.classes().get(name)!=0));
+	} else {
+		throw Exception(PARSER_RUNTIME, &type, "is invalid type, must be '%s'", def_class.cstr());
+	}
 }
 
 static void _methods(Request& r, MethodParams& params) {
 	const String& class_name=params.as_string(0, "class_name must be string");
-	Value* class_value=r.get_class(class_name);
-	if(!class_value)
-		throw Exception(PARSER_RUNTIME,
-			&class_name,
-			"class is undefined");
+	VStateless_class* vclass=r.get_class(class_name);
+	if(!vclass)
+		throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
 
 	VHash& result=*new VHash;
-	if(VStateless_class* lclass=class_value->get_class()) {
-		HashStringMethod methods=lclass->get_methods();
-		methods.for_each(store_method_info, result.get_hash());
-	} else {
-		// class which does not have methods (env, console, etc)
+	for(HashStringMethod::Iterator i(vclass->get_methods()); i; i.next()){
+		result.hash().put(i.key(), new VString(i.value()->native_code ? method_type_native : method_type_parser));
 	}
+
 	r.write_no_lang(result);
 }
 
+static VJunction &method_junction(Value &self, Method &method){
+	if(method.native_code)
+		throw Exception(PARSER_RUNTIME, method.name, "method must not be native");
+
+	if(!(dynamic_cast<VObject*>(&self) || dynamic_cast<VClass*>(&self)))
+		throw Exception(PARSER_RUNTIME, 0, "self must be parser object or class");
+
+	return *method.get_vjunction(self);
+}
+
 static void _method(Request& r, MethodParams& params) {
-	Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
+	Value &source=params[0];
+
+	if(Junction *j=source.get_junction()){
+		if(Method* method=const_cast<Method*>(j->method)){
+			Value& self=params.count()>1 ? params.as_no_junction(1, "self must be object, not junction") : r.get_method_frame()->caller()->self();
+			r.write_no_lang(method_junction(self, *method));
+			return;
+		}
+		throw Exception(PARSER_RUNTIME, 0, "param must be method junction");
+	}
+
+	if(params.count()==1)
+		throw Exception(PARSER_RUNTIME, 0, "method name must be specified");
+
 	const String& name=params.as_string(1, "method name must be string");
 
-	if(VStateless_class* lclass=o.get_class()) {
-		if(Method* method=lclass->get_method(name))
-			r.write_no_lang(*method->get_vjunction(o));
-	} else {
-		// class which does not have methods (env, console, etc)
+	if(VStateless_class* vclass=source.get_class()) {
+		if(Method* method=vclass->get_method(name)){
+			r.write_no_lang( params.count()>2 ? method_junction(params.as_no_junction(2, "self must be object, not junction"), *method) : *method->get_vjunction(source) );
+			return;
+		}
 	}
+	r.write_value(*VVoid::get());
 }
 
 static void _fields(Request& r, MethodParams& params) {
 	Value& o=params.as_no_junction(0, "param must be object or class, not junction");
 
-	if(HashStringValue* fields=o.get_fields()) {
-		VHash& result=*new VHash(*fields);
-		r.write_no_lang(result);
-	} else
+	if(HashStringValue* fields=o.get_fields())
+		r.write_no_lang(*new VHash(*fields));
+	else
 		r.write_no_lang(*new VHash());
 }
 
+static void _fields_reference(Request& r, MethodParams& params) {
+	Value& o=params.as_no_junction(0, "param must be object or hash, not junction");
+
+	if(HashStringValue* fields=o.get_fields_reference())
+		r.write_no_lang(*new VHashReference(*fields));
+	else
+		throw Exception(PARSER_RUNTIME, 0, "param must be object or hash");
+}
+
 static void _field(Request& r, MethodParams& params) {
 	Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
 	const String& name=params.as_string(1, "field name must be string");
@@ -235,46 +257,46 @@ static void _field(Request& r, MethodPar
 }
 
 static void _method_info(Request& r, MethodParams& params) {
-	const String& class_name=params.as_string(0, "class_name must be string");
-	Value* class_value=r.get_class(class_name);
-	if(!class_value)
-		throw Exception(PARSER_RUNTIME,
-			&class_name,
-			"class is undefined");
-
-	VStateless_class* lclass=class_value->get_class();
-	if(!lclass)
-		throw Exception(PARSER_RUNTIME,
-			&class_name,
-			"class does not have methods");
+	const Method* method;
+	VStateless_class* vclass=0;
 
-	const String& method_name=params.as_string(1, "method_name must be string");
-	Method* method=lclass->get_method(method_name);
-	if(!method)
-		throw Exception(PARSER_RUNTIME,
-			&method_name,
-			"method not found in class %s",
-			class_name.cstr());
+	if(Junction *j=params[0].get_junction()){
+		if(!(method=j->method))
+			throw Exception(PARSER_RUNTIME, 0, "param must be class name or method junction");
+	} else {
+		const String& class_name=params.as_string(0, "param must be class name or method junction");
+		if(!(vclass=r.get_class(class_name)))
+			throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
+
+		if(params.count()==1)
+			throw Exception(PARSER_RUNTIME, 0, "method name must be specified");
+
+		const String& method_name=params.as_string(1, "method name must be string");
+		if(!(method=vclass->get_method(method_name)))
+			throw Exception(PARSER_RUNTIME, &method_name, "method not found in class '%s'", vclass->type());
+	}
 
 	VHash& result=*new VHash;
 	HashStringValue* hash=result.get_hash();
+	hash->put(method_name, new VString(*method->name));
 
-	VStateless_class* c=lclass;
 	Method* base_method;
-	if(c->base() && (base_method=c->base()->get_method(method_name))){
-		c=c->base()->get_class();
-		while(c->base() && base_method==c->base()->get_method(method_name))
+	if(vclass && vclass->base() && (base_method=vclass->base()->get_method(*method->name))){
+		VStateless_class* c=vclass->base()->get_class();
+		while(c->base() && base_method==c->base()->get_method(*method->name))
 			c=c->base()->get_class();
-		hash->put((base_method==method) ? method_inherited : method_overridden, new VString(c->name()));
+		hash->put((base_method==method) ? method_inherited : method_overridden, new VString(*new String(c->type())));
 	}
 
 	Value* call_type=0;
 	switch(method->call_type){
 		case Method::CT_DYNAMIC:
-			call_type=new VString(method_call_type_dynamic);
+			call_type=new VString(Symbols::DYNAMIC_SYMBOL);
 			break;
 		case Method::CT_STATIC:
-			call_type=new VString(method_call_type_static);
+			call_type=new VString(Symbols::STATIC_SYMBOL);
+			break;
+		case Method::CT_ANY:
 			break;
 	}
 	if(call_type)
@@ -312,10 +334,27 @@ static void _dynamical(Request& r, Metho
 	}
 }
 
+static void _is(Request& r, MethodParams& params) {
+	const String& name=params.as_string(0, "element name must be string");
+	const String& type=params.as_string(1, "class name must be string");
+	Value *context=params.count()==3 ? &(params.as_no_junction(2, "context must not be code")) : r.get_method_frame()->caller();
+	Value *value=context ? context->get_element(name) : 0;
+
+	if(value) {
+		if(type == "code" || type == "method") {
+			Junction *junction=value->get_junction();
+			r.write_no_lang(VBool::get(junction && ((junction->code==0) ^ (type == "code"))) );
+		} else {
+			r.write_no_lang(VBool::get( value->is(type.cstr()) ));
+		}
+	} else
+		r.write_no_lang(VBool::get(type == "void"));
+}
+
 static void _copy(Request& r, MethodParams& params) {
 	HashStringValue* src=params.as_no_junction(0, "source must not be code").get_hash();
 
-	if(src==NULL) 
+	if(src==NULL)
 		throw Exception(PARSER_RUNTIME, 0, "source must have hash representation");
 
 	Value& dst=params.as_no_junction(1, "destination must not be code");
@@ -330,13 +369,93 @@ static void _uid(Request& r, MethodParam
 	char local_buf[MAX_NUMBER];
 	int size=snprintf(local_buf, sizeof(local_buf), "%p", &obj);
 
-	r.write_pass_lang(*new String(pa_strdup(local_buf, (size_t)size), String::L_CLEAN, size));
+	r.write_pass_lang(*new String(String::C(pa_strdup(local_buf, (size_t)size), size)));
 }
 
 static void _delete(Request&, MethodParams& params) {
+	Value* v=&params.as_no_junction(0, "param must be object or class, not junction");
 	const String& key=params.as_string(1, "field name must be string");
-	if(HashStringValue* fields=params[0].get_fields()){
-		fields->remove(key);
+
+	if(VObject* o=dynamic_cast<VObject*>(v)){
+		o->get_fields()->remove(key);
+	} else if(VClass* c=dynamic_cast<VClass*>(v)){
+		HashStringProperty &p=*c->get_properties();
+		if(Property* property=p.get(key))
+			if(property->value)
+				p.remove(key);
+	}
+}
+
+static void _mixin(Request& r, MethodParams& params) {
+	Value& vsource=params.as_no_junction(0, "source must not be code");
+
+	Value* vtarget=0;
+	const String *name=0;
+	bool copy_methods=true;
+	bool copy_fields=true;
+	bool overwrite=false;
+
+	if(params.count()>1)
+		if(HashStringValue* options=params.as_hash(1, "mixin options")) {
+			int valid_options=0;
+			if(vtarget=options->get("to")) {
+				valid_options++;
+			}
+			if(Value* vname=options->get("name")) {
+				name=&vname->as_string();
+				valid_options++;
+			}
+			if(Value* vmethods=options->get("methods")) {
+				copy_methods=r.process(*vmethods).as_bool();
+				valid_options++;
+			}
+			if(Value* vfields=options->get("fields")) {
+				copy_fields=r.process(*vfields).as_bool();
+				valid_options++;
+			}
+			if(Value* voverwrite=options->get("overwrite")) {
+				overwrite=r.process(*voverwrite).as_bool();
+				valid_options++;
+			}
+			if(valid_options!=options->count())
+				throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
+		}
+
+	if(!vtarget)
+		vtarget=&r.get_method_frame()->caller()->self();
+
+	VClass* source=dynamic_cast<VClass*>(vsource.get_class());
+	VClass* target=dynamic_cast<VClass*>(vtarget->get_class());
+
+	if(!source)
+		throw Exception(PARSER_RUNTIME, 0, "source must be parser object or class");
+	if(!target)
+		throw Exception(PARSER_RUNTIME, 0, "destination must be parser object or class");
+
+	if(name){
+		if(copy_methods)
+			if(Method* method=source->get_method(*name))
+				if(overwrite || !target->get_method(*name)){
+					target->set_method(*name, new Method(*method));
+				}
+
+		if(copy_fields)
+			if(Property* property=source->get_properties()->get(*name))
+				if(property->value && (overwrite || !target->get_properties()->get(*name))){
+					target->put_element(*target, *name, property->value);
+				}
+
+	} else {
+		if(copy_methods)
+			for(HashStringMethod::Iterator i(source->get_methods()); i; i.next()){
+				if(overwrite || !target->get_method(i.key()))
+					target->set_method(*i.value()->name, new Method(*i.value()));
+			}
+		if(copy_fields)
+			for(HashStringProperty::Iterator i(*source->get_properties()); i; i.next()){
+				if(i.value()->value && ( overwrite || !target->get_properties()->get(i.key()) ))
+					target->put_element(*target, *new String(i.key(), String::L_TAINTED), i.value()->value);
+			}
 	}
 }
 
@@ -355,30 +474,44 @@ MReflection::MReflection(): Methoded("re
 	// ^reflection:class_name[object]
 	add_native_method("class_name", Method::CT_STATIC, _class_name, 1, 1);
 
+	// ^reflection:class_by_name[class_name]
+	add_native_method("class_by_name", Method::CT_STATIC, _class_by_name, 1, 1);
+
 	// ^reflection:base_class[object]
 	add_native_method("base", Method::CT_STATIC, _base, 1, 1);
 
 	// ^reflection:base_class_name[object]
 	add_native_method("base_name", Method::CT_STATIC, _base_name, 1, 1);
 
+	// ^reflection:def[class|...;name]
+	add_native_method("def", Method::CT_STATIC, _def, 2, 2);
+
 	// ^reflection:methods[class_name]
 	add_native_method("methods", Method::CT_STATIC, _methods, 1, 1);
 
-	// ^reflection:method[object or class;method_name]
-	add_native_method("method", Method::CT_STATIC, _method, 2, 2);
+	// ^reflection:method[object or class;method_name[;self]]
+	// ^reflection:method[junction[;self]]
+	add_native_method("method", Method::CT_STATIC, _method, 1, 3);
 
 	// ^reflection:method_info[class_name;method_name]
-	add_native_method("method_info", Method::CT_STATIC, _method_info, 2, 2);
+	// ^reflection:method_info[junction]
+	add_native_method("method_info", Method::CT_STATIC, _method_info, 1, 2);
 
 	// ^reflection:fields[object or class]
 	add_native_method("fields", Method::CT_STATIC, _fields, 1, 1);
 
+	// ^reflection:fields_reference[object]
+	add_native_method("fields_reference", Method::CT_STATIC, _fields_reference, 1, 1);
+
 	// ^reflection:field[object or class;field_name]
 	add_native_method("field", Method::CT_STATIC, _field, 2, 2);
 
 	// ^reflection:dynamical[[object or class, caller if absent]]
 	add_native_method("dynamical", Method::CT_STATIC, _dynamical, 0, 1);
 
+	// ^reflection:is[element_name;class_name|code|method[;context]]
+	add_native_method("is", Method::CT_STATIC, _is, 2, 3);
+
 	// ^reflection:copy[src;dst]
 	add_native_method("copy", Method::CT_STATIC, _copy, 2, 2);
 
@@ -387,4 +520,8 @@ MReflection::MReflection(): Methoded("re
 
 	// ^reflection:delete[object or class;field_name]
 	add_native_method("delete", Method::CT_STATIC, _delete, 2, 2);
+
+	// ^reflection:mixin[object or class or junction;options]
+	add_native_method("mixin", Method::CT_STATIC, _mixin, 1, 2);
+
 }