Index: uspace/dist/src/sysel/demos/array.sy
===================================================================
--- uspace/dist/src/sysel/demos/array.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/array.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,46 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+class ArrayDemo is
+	fun Main() is
+		var a : int[,];
+		var i : int;
+
+		a = new int[3, 2];
+
+		a[0, 0] = 1;
+		a[1, 0] = 2;
+		a[2, 0] = 3;
+
+		i = 0;
+		while i < 3 do
+			Builtin.WriteLine(a[i, 0]);
+			i = i + 1;
+		end
+	end
+end
Index: uspace/dist/src/sysel/demos/count.sy
===================================================================
--- uspace/dist/src/sysel/demos/count.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/count.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,44 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+class CountDemo is
+	fun Count(a : int; b : int) is
+		var i : int;
+
+		i = a;
+		while i < b do
+			Builtin.WriteLine(i);
+			i = i + 1;
+		end
+
+	end
+
+	fun Main() is
+		Count(0, 10);
+	end
+end
Index: uspace/dist/src/sysel/demos/except.sy
===================================================================
--- uspace/dist/src/sysel/demos/except.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/except.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,53 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+class ExceptionDemo is
+	fun foo() is
+	        Builtin.WriteLine("Entered foo().");
+		raise new BaseException();
+	end
+
+	fun Main() is
+		do
+			foo();
+			foo();
+		except e : DerivedException do
+			Builtin.WriteLine("Caught derived exception.");
+		except e : BaseException do
+			Builtin.WriteLine("Caught base exception.");
+		finally do
+			Builtin.WriteLine("Finally.");
+		end
+	end
+end
+
+class BaseException is
+end
+
+class DerivedException : BaseException is
+end
Index: uspace/dist/src/sysel/demos/hello.sy
===================================================================
--- uspace/dist/src/sysel/demos/hello.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/hello.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,33 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+class HelloWorld is
+	fun Main() is
+		Builtin.WriteLine("Hello world!");
+	end
+end
Index: uspace/dist/src/sysel/demos/hexec.sy
===================================================================
--- uspace/dist/src/sysel/demos/hexec.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/hexec.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,34 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+class HelenOSExecDemo is
+	fun Main() is
+		Task.Exec("/app/tester");
+		Task.Exec("/app/tester", "print1");
+	end
+end
Index: uspace/dist/src/sysel/demos/inherit.sy
===================================================================
--- uspace/dist/src/sysel/demos/inherit.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/inherit.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,69 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+class A is
+	fun Foo() is
+		Builtin.WriteLine("A.Foo()");
+	end
+end
+
+class B : A is
+	fun Foo() is
+		Builtin.WriteLine("B.Foo()");
+	end
+end
+
+class C : A is
+end
+
+class InheritanceDemo is
+	fun Main() is
+		var a : A;
+		var c : C;
+
+		-- Construct and assign object.
+		a = new A();
+		a.Foo();
+
+		-- Implicit conversion to base type.
+		a = new B();
+		a.Foo();
+
+		a = new C();
+		a.Foo();
+
+		-- Test 'as' operator for conversion to derived type.
+		c = a as C;
+
+		-- Test grandfather class.
+		var d : Object;
+		d = a;
+		d = new B();
+		d = c;
+	end
+end
Index: uspace/dist/src/sysel/demos/list.sy
===================================================================
--- uspace/dist/src/sysel/demos/list.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/list.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,143 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+-- Doubly-linked list implementation.
+class List is
+	var head : ListNode;
+
+	-- Initialize list.
+	fun Init() is
+		head = new ListNode();
+		head.prev = head;
+		head.next = head;
+	end
+
+	-- Append new entry at the end of the list.
+	fun Append(data : int) is
+		var n : ListNode;
+		var ntl : ListNode;
+
+		ntl = head.prev;
+
+		n = new ListNode();
+		n.value = data;
+
+		n.prev = ntl;
+		n.next = head;
+		n.head = head;
+
+		ntl.next = n;
+		head.prev = n;
+	end
+
+	-- Return first node in the list or @c nil if there is none.
+	prop First : ListNode is
+		get is
+		    return get_first();
+		end
+	end
+
+	-- Return first node in the list or @c nil if there is none.
+	fun get_first() : ListNode is
+		if head.next == head then
+			return nil;
+		else
+			return head.next;
+		end
+	end
+end
+
+class ListNode is
+	var value : int;
+
+	var prev : ListNode;
+	var next : ListNode;
+	var head : ListNode;
+
+	-- Value stored in this node.
+	prop Value : int is
+		get is
+			return value;
+		end
+	end
+
+	-- Previous node in list.
+	prop Prev : ListNode is
+		get is
+			return get_prev();
+		end
+	end
+
+	-- Next node in list.
+	prop Next : ListNode is
+		get is
+			return get_next();
+		end
+	end
+
+	-- Get next node.
+	fun get_next() : ListNode is
+		if next != head then
+			return next;
+		else
+			return nil;
+		end
+	end
+
+	-- Get previous node.
+	fun get_prev() : ListNode is
+		if prev != head then
+			return next;
+		else
+			return nil;
+		end
+	end
+
+end
+
+class ListDemo is
+	fun Main() is
+		var list : List;
+
+		list = new List();
+		list.Init();
+
+		list.Append(5);
+		list.Append(6);
+		list.Append(7);
+		list.Append(8);
+
+		var n : ListNode;
+
+		n = list.First;
+		while n != nil do
+			Builtin.WriteLine(n.value);
+			n = n.Next;
+		end
+	end
+end
Index: uspace/dist/src/sysel/demos/property.sy
===================================================================
--- uspace/dist/src/sysel/demos/property.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/property.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,138 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+class Foo is
+	var x : int;
+
+	-- Example of a named property
+	prop X : int is
+		get is
+			Builtin.WriteLine("Getting value of X which is");
+			Builtin.WriteLine(x);
+			return x;
+		end
+
+		set value is
+			Builtin.WriteLine("Setting value of X to");
+			Builtin.WriteLine(value);
+			x = value;
+		end
+	end
+
+	-- Backing store for indexed properties
+	var iprops : int[];
+
+	-- Example of an indexed property set (i.e. an indexer)
+	prop self[index : int] : int is
+		get is
+			Builtin.WriteLine("Getting property with index ");
+			Builtin.WriteLine(index);
+			Builtin.WriteLine("which is");
+			Builtin.WriteLine(iprops[index]);
+
+			return iprops[index];
+		end
+
+		set value is
+			Builtin.WriteLine("Setting property with index ");
+			Builtin.WriteLine(index);
+			Builtin.WriteLine("to");
+			Builtin.WriteLine(value);
+
+			iprops[index] = value;
+		end
+	end
+
+	--
+	-- Class-type property. This is used for demonstrating property
+	-- field access. This case is still quite easy. It does not require
+	-- read-modify-write. Since class is a reference type, access
+	-- operator will read the value and dereference it, thereby
+	-- getting somewhere else (so the value will not be modified and
+	-- need not be written back).
+	--
+
+	var bprop : Bar;
+
+	prop B : Bar is
+		get is
+			Builtin.WriteLine("Getting B");
+			return bprop;
+		end
+		set value is
+			Builtin.WriteLine("Setting B");
+			bprop = value;
+		end
+	end
+
+end
+
+class Bar is
+	var i : int;
+end
+
+class PropertyDemo is
+	fun Main() is
+		var a : Foo;
+		var i : int;
+
+		a = new Foo();
+
+		-- Get value of named property.
+		a.X = 1;
+
+		-- Set value of named property.
+		i = a.X;
+
+		Builtin.WriteLine("Main(): Got ");
+		Builtin.WriteLine(i);
+
+		a.iprops = new int[5];
+
+		-- Set value of indexed property.
+		a[1] = 2;
+
+		-- Get value of indexed property.
+		i = a[1];
+
+		Builtin.WriteLine("Main(): Got ");
+		Builtin.WriteLine(i);
+
+		-- Property field access
+		var b : Bar;
+
+		b = new Bar();
+
+		b.i = 42;
+		a.bprop = b;
+
+		Builtin.WriteLine(a.bprop.i);
+		a.bprop.i = 2;
+		Builtin.WriteLine(a.bprop.i);
+	end
+end
Index: uspace/dist/src/sysel/demos/string.sy
===================================================================
--- uspace/dist/src/sysel/demos/string.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/string.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,42 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+class StringDemo is
+	fun Main() is
+		-- Concatenate some strings.
+		Builtin.WriteLine("One-" + "two-" + "three!");
+
+		-- Extract characters from a string.
+		var i : int;
+		i = 0;
+		while i < 5 do
+			Builtin.WriteLine("ABCDE"[i]);
+			i = i + 1;
+		end
+	end
+end
Index: uspace/dist/src/sysel/demos/varargs.sy
===================================================================
--- uspace/dist/src/sysel/demos/varargs.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
+++ uspace/dist/src/sysel/demos/varargs.sy	(revision a95310e6c21b65da8082d89519635d2b9cf8168c)
@@ -0,0 +1,51 @@
+--
+-- Copyright (c) 2010 Jiri Svoboda
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+--
+-- o Redistributions of source code must retain the above copyright
+--   notice, this list of conditions and the following disclaimer.
+-- o Redistributions in binary form must reproduce the above copyright
+--   notice, this list of conditions and the following disclaimer in the
+--   documentation and/or other materials provided with the distribution.
+-- o The name of the author may not be used to endorse or promote products
+--   derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+--
+
+class VariadicArgumentsDemo is
+	--- Variadic function example.
+	--
+	-- A variadic function is declared by marking its last argument
+	-- with the attribute 'packed'.
+	--
+	-- Note that we need to pass 'n' just because the array type
+	-- does not implement the Length property yet.
+	--
+	fun Print(n : int; args : string[], packed) is
+		var i : int;
+
+		i = 0;
+		while i < n do
+			Builtin.WriteLine(args[i]);
+			i = i + 1;
+		end
+	end
+
+	fun Main() is
+		Print(5, "One", "Two", "Three", "Four", "Five");
+	end
+end