diff --git a/docs/OOP.md b/docs/OOP.md
index febc801..6708e11 100644
--- a/docs/OOP.md
+++ b/docs/OOP.md
@@ -158,7 +158,7 @@ For example, for our class Point:
     assert( Point(1,2) < Point(2,2) )
     assert( Point(1,2) < Point(1,3) )
     Point(1,1+1)
-    >>> Point(1, 2)
+    >>> Point(x=1,y=2)
 
 # Theory
 
diff --git a/docs/development/including_modules.md b/docs/development/including_modules.md
index f201a0b..f00e16c 100644
--- a/docs/development/including_modules.md
+++ b/docs/development/including_modules.md
@@ -39,22 +39,5 @@ We can just put the code into the module code:
 
 ## class initialization
 
-    class foo {
-        
-        private static var instanceCounter = 0
-        
-        val instanceId = instanceCounter
-        
-        fun close() {
-            instanceCounter--
-        }
-
-        // instance initializatino could be as this:
-        if( instanceId > 100 )
-            throw Exception("Too many instances")
-
-        static {
-            // static, one-per-class initializer could be posted here
-            instanceCounter = 1
-        }
-    }
+already done using `ObjInstance` class and instance-bound context with local
+context stored in ObjInstance and class constructor statement in ObjClass.
\ No newline at end of file
diff --git a/library/build.gradle.kts b/library/build.gradle.kts
index 17141d8..b2c4242 100644
--- a/library/build.gradle.kts
+++ b/library/build.gradle.kts
@@ -5,7 +5,7 @@ import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 group = "net.sergeych"
-version = "0.2.1-SNAPSHOT"
+version = "0.3.0-SNAPSHOT"
 
 buildscript {
     repositories {
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/AccessType.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/AccessType.kt
new file mode 100644
index 0000000..7af0fd6
--- /dev/null
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/AccessType.kt
@@ -0,0 +1,8 @@
+package net.sergeych.lyng
+
+enum class AccessType(val isMutable: Boolean) {
+    Val(false), Var(true),
+
+    @Suppress("unused")
+    Initialization(false)
+}
\ No newline at end of file
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/ArgsDeclaration.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/ArgsDeclaration.kt
index 1bdea48..124087f 100644
--- a/library/src/commonMain/kotlin/net/sergeych/lyng/ArgsDeclaration.kt
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/ArgsDeclaration.kt
@@ -23,8 +23,8 @@ data class ArgsDeclaration(val params: List<Item>, val endTokenType: Token.Type)
     suspend fun assignToContext(
         context: Context,
         fromArgs: Arguments = context.args,
-        defaultAccessType: Compiler.AccessType = Compiler.AccessType.Var,
-        defaultVisibility: Compiler.Visibility = Compiler.Visibility.Public
+        defaultAccessType: AccessType = AccessType.Var,
+        defaultVisibility: Visibility = Visibility.Public
     ) {
         fun assign(a: Item, value: Obj) {
             context.addItem(a.name, (a.accessType ?: defaultAccessType).isMutable, value,
@@ -100,7 +100,7 @@ data class ArgsDeclaration(val params: List<Item>, val endTokenType: Token.Type)
          * So it is a [Statement] that must be executed on __caller context__.
          */
         val defaultValue: Statement? = null,
-        val accessType: Compiler.AccessType? = null,
-        val visibility: Compiler.Visibility? = null,
+        val accessType: AccessType? = null,
+        val visibility: Visibility? = null,
     )
 }
\ No newline at end of file
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/Compiler.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/Compiler.kt
index e821a71..4fa7f83 100644
--- a/library/src/commonMain/kotlin/net/sergeych/lyng/Compiler.kt
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/Compiler.kt
@@ -19,11 +19,12 @@ class Compiler(
 
     private fun parseScript(start: Pos, cc: CompilerContext): Script {
         val statements = mutableListOf<Statement>()
+//        val returnScope = cc.startReturnScope()
         while (parseStatement(cc, braceMeansLambda = true)?.also {
                 statements += it
             } != null) {/**/
         }
-        return Script(start, statements)
+        return Script(start, statements)//returnScope.needCatch)
     }
 
     private fun parseStatement(cc: CompilerContext, braceMeansLambda: Boolean = false): Statement? {
@@ -439,17 +440,6 @@ class Compiler(
         }
     }
 
-    enum class AccessType(val isMutable: Boolean) {
-        Val(false), Var(true),
-
-        @Suppress("unused")
-        Initialization(false)
-    }
-
-    enum class Visibility {
-        Public, Private, Protected//, Internal
-    }
-
     /**
      * Parse argument declaration, used in lambda (and later in fn too)
      * @return declaration or null if there is no valid list of arguments
@@ -765,22 +755,6 @@ class Compiler(
             // fields. Note that 'this' is already set by class
             constructorArgsDeclaration?.assignToContext(this)
             bodyInit?.execute(this)
-            // export public
-            for ((name, record) in objects) {
-                when (record.visibility) {
-                    Visibility.Public -> {
-                        thisObj.objClass.publicFields += name
-                        thisObj.objClass.protectedFields += name
-                    }
-
-                    Visibility.Protected ->
-                        thisObj.objClass.protectedFields += name
-
-                    Visibility.Private -> {
-                        //println("private field: $name")
-                    }
-                }
-            }
 
             thisObj
         }
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/CompilerContext.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/CompilerContext.kt
index 1ac8b38..acb955e 100644
--- a/library/src/commonMain/kotlin/net/sergeych/lyng/CompilerContext.kt
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/CompilerContext.kt
@@ -123,15 +123,23 @@ internal class CompilerContext(val tokens: List<Token>) {
     /**
      * Scan backwards as deep as specified looking for visibility token. Does not change position.
      */
-    fun getVisibility(default: Compiler.Visibility = Compiler.Visibility.Public, depths: Int = 2): Compiler.Visibility {
+    fun getVisibility(default: Visibility = Visibility.Public, depths: Int = 2): Visibility {
         for( i in -depths .. -1) {
             when( atOffset(i)?.type) {
-                Token.Type.PROTECTED -> return Compiler.Visibility.Protected
-                Token.Type.PRIVATE -> return Compiler.Visibility.Private
+                Token.Type.PROTECTED -> return Visibility.Protected
+                Token.Type.PRIVATE -> return Visibility.Private
                 else -> {}
             }
         }
         return default
     }
 
+//    data class ReturnScope(val needCatch: Boolean = false)
+
+//    private val
+
+//    fun startReturnScope(): ReturnScope {
+//        return ReturnScope()
+//    }
+
 }
\ No newline at end of file
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/Context.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/Context.kt
index 1880e26..2c6d767 100644
--- a/library/src/commonMain/kotlin/net/sergeych/lyng/Context.kt
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/Context.kt
@@ -78,7 +78,7 @@ class Context(
         name: String,
         isMutable: Boolean,
         value: Obj,
-        visibility: Compiler.Visibility = Compiler.Visibility.Public
+        visibility: Visibility = Visibility.Public
     ): ObjRecord {
         return ObjRecord(value, isMutable, visibility).also { objects.put(name, it) }
     }
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/Obj.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/Obj.kt
index a32a02b..a245440 100644
--- a/library/src/commonMain/kotlin/net/sergeych/lyng/Obj.kt
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/Obj.kt
@@ -12,7 +12,7 @@ import net.sergeych.synctools.ProtectedOp
 data class ObjRecord(
     var value: Obj,
     val isMutable: Boolean,
-    val visibility: Compiler.Visibility = Compiler.Visibility.Public
+    val visibility: Visibility = Visibility.Public
 )
 
 /**
@@ -341,4 +341,5 @@ class ObjIndexOutOfBoundsError(context: Context, message: String = "index out of
 class ObjIllegalArgumentError(context: Context, message: String = "illegal argument") : ObjError(context, message)
 class ObjIllegalAssignmentError(context: Context, message: String = "illegal assignment") : ObjError(context, message)
 class ObjSymbolNotDefinedError(context: Context, message: String = "symbol is not defined") : ObjError(context, message)
-class ObjIterationFinishedError(context: Context) : ObjError(context, "iteration finished")
\ No newline at end of file
+class ObjIterationFinishedError(context: Context) : ObjError(context, "iteration finished")
+class ObjAccessError(context: Context, message: String = "access not allowed error") : ObjError(context, message)
\ No newline at end of file
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/ObjClass.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/ObjClass.kt
index 7ed385b..56ef4d7 100644
--- a/library/src/commonMain/kotlin/net/sergeych/lyng/ObjClass.kt
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/ObjClass.kt
@@ -7,9 +7,6 @@ class ObjClass(
     vararg val parents: ObjClass,
 ) : Obj() {
 
-    internal val publicFields = mutableSetOf<String>()
-    internal val protectedFields = mutableSetOf<String>()
-
     var instanceConstructor: Statement? = null
 
     val allParentsSet: Set<ObjClass> = parents.flatMap {
@@ -42,10 +39,10 @@ class ObjClass(
         name: String,
         initialValue: Obj,
         isMutable: Boolean = false,
-        visibility: Compiler.Visibility = Compiler.Visibility.Public,
+        visibility: Visibility = Visibility.Public,
         pos: Pos = Pos.builtIn
     ) {
-        if (name in members || allParentsSet.any { name in it.members } == true)
+        if (name in members || allParentsSet.any { name in it.members })
             throw ScriptError(pos, "$name is already defined in $objClass or one of its supertypes")
         members[name] = ObjRecord(initialValue, isMutable, visibility)
     }
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/ObjInstance.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/ObjInstance.kt
index b96d7ab..80d9140 100644
--- a/library/src/commonMain/kotlin/net/sergeych/lyng/ObjInstance.kt
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/ObjInstance.kt
@@ -5,38 +5,48 @@ class ObjInstance(override val objClass: ObjClass) : Obj() {
     internal lateinit var instanceContext: Context
 
     override suspend fun readField(context: Context, name: String): ObjRecord {
-        return if( name in objClass.publicFields ) instanceContext[name]!!
-        else super.readField(context, name)
+        return instanceContext[name]?.let {
+            if (it.visibility.isPublic)
+                it
+            else
+                context.raiseError(ObjAccessError(context, "can't access non-public field $name"))
+        }
+            ?: super.readField(context, name)
     }
 
     override suspend fun writeField(context: Context, name: String, newValue: Obj) {
-        if( name in objClass.publicFields ) {
-            val f = instanceContext[name]!!
-            if( !f.isMutable ) ObjIllegalAssignmentError(context, "can't reassign val $name").raise()
-            if( f.value.assign(context, newValue) == null)
+        instanceContext[name]?.let { f ->
+            if (!f.visibility.isPublic)
+                ObjIllegalAssignmentError(context, "can't assign to non-public field $name")
+            if (!f.isMutable) ObjIllegalAssignmentError(context, "can't reassign val $name").raise()
+            if (f.value.assign(context, newValue) == null)
                 f.value = newValue
-        }
-        else super.writeField(context, name, newValue)
+        } ?: super.writeField(context, name, newValue)
     }
 
-    override suspend fun invokeInstanceMethod(context: Context, name: String, args: Arguments): Obj {
-        if( name in objClass.publicFields ) return instanceContext[name]!!.value.invoke(context, this, args)
-        return super.invokeInstanceMethod(context, name, args)
-    }
+    override suspend fun invokeInstanceMethod(context: Context, name: String, args: Arguments): Obj =
+        instanceContext[name]?.let {
+            if (it.visibility.isPublic)
+                it.value.invoke(context, this, args)
+            else
+                context.raiseError(ObjAccessError(context, "can't invoke non-public method $name"))
+        }
+            ?: super.invokeInstanceMethod(context, name, args)
+
+    private val publicFields: Map<String, ObjRecord>
+        get() = instanceContext.objects.filter { it.value.visibility.isPublic }
 
     override fun toString(): String {
-        val fields = objClass.publicFields.map {
-                instanceContext[it]?.value?.toString() ?: "??"
-        }.joinToString(", ")
+        val fields = publicFields.map { "${it.key}=${it.value.value}" }.joinToString(",")
         return "${objClass.className}($fields)"
     }
 
     override suspend fun compareTo(context: Context, other: Obj): Int {
-        if( other !is ObjInstance ) return -1
-        if( other.objClass != objClass ) return -1
-        for( f in objClass.publicFields ) {
-            val a = instanceContext[f]!!.value
-            val b = other.instanceContext[f]!!.value
+        if (other !is ObjInstance) return -1
+        if (other.objClass != objClass) return -1
+        for (f in publicFields) {
+            val a = f.value.value
+            val b = other.instanceContext[f.key]!!.value
             val d = a.compareTo(context, b)
             if (d != 0) return d
         }
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/Script.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/Script.kt
index f5cee42..47ab882 100644
--- a/library/src/commonMain/kotlin/net/sergeych/lyng/Script.kt
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/Script.kt
@@ -6,6 +6,7 @@ import kotlin.math.*
 class Script(
     override val pos: Pos,
     private val statements: List<Statement> = emptyList(),
+//    private val catchReturn: Boolean = false,
 ) : Statement() {
 
     override suspend fun execute(context: Context): Obj {
diff --git a/library/src/commonMain/kotlin/net/sergeych/lyng/Visibility.kt b/library/src/commonMain/kotlin/net/sergeych/lyng/Visibility.kt
new file mode 100644
index 0000000..51c553e
--- /dev/null
+++ b/library/src/commonMain/kotlin/net/sergeych/lyng/Visibility.kt
@@ -0,0 +1,8 @@
+package net.sergeych.lyng
+
+enum class Visibility {
+    Public, Private, Protected;//, Internal
+    val isPublic by lazy { this == Public }
+    @Suppress("unused")
+    val isProtected by lazy { this == Protected }
+}
\ No newline at end of file
diff --git a/library/src/commonTest/kotlin/ScriptTest.kt b/library/src/commonTest/kotlin/ScriptTest.kt
index 9d33a4e..715cc2b 100644
--- a/library/src/commonTest/kotlin/ScriptTest.kt
+++ b/library/src/commonTest/kotlin/ScriptTest.kt
@@ -1513,4 +1513,11 @@ class ScriptTest {
             assert( Point(1,2) < Point(1,3) )
         """.trimIndent())
     }
+
+    @Test
+    fun testAccessShortcuts() {
+        assertTrue( Visibility.Public.isPublic )
+        assertFalse( Visibility.Private.isPublic )
+        assertFalse( Visibility.Protected.isPublic )
+    }
 }
\ No newline at end of file