X-Git-Url: http://nitlanguage.org

diff --git a/contrib/nitcc/examples/minilang.nit b/contrib/nitcc/examples/minilang.nit
new file mode 100644
index 0000000..c639f14
--- /dev/null
+++ b/contrib/nitcc/examples/minilang.nit
@@ -0,0 +1,182 @@
+import minilang_test_parser
+
+class Interpretor
+	super Visitor
+	var stack = new Array[Int]
+	var bstack = new Array[Bool]
+	var vars = new HashMap[String, Int]
+
+	redef fun visit(n) do n.accept_calculator(self)
+end
+
+redef class Node
+	fun accept_calculator(v: Interpretor) do visit_children(v)
+end
+
+redef class Nint
+	redef fun accept_calculator(v) do v.stack.push(text.to_i)
+end
+
+redef class Ns_assign
+	redef fun accept_calculator(v) do
+		super
+		v.vars[n_id.text] = v.stack.pop
+	end
+end
+
+redef class Ns_print
+	redef fun accept_calculator(v) do
+		super
+		printn v.stack.pop
+	end
+end
+redef class Ns_print_str
+	redef fun accept_calculator(v) do
+		var text = n_str.text
+		text = text.substring(1, text.length-2)
+		printn text
+	end
+end
+redef class Ns_println
+	redef fun accept_calculator(v) do
+		print ""
+	end
+end
+redef class Ns_if
+	redef fun accept_calculator(v) do
+		v.enter_visit(n_c)
+		if v.bstack.pop then
+			v.enter_visit(n_then)
+		else
+			var nelse = n_else
+			if nelse != null then v.enter_visit(nelse)
+		end
+	end
+end
+redef class Ns_while
+	redef fun accept_calculator(v) do
+		loop
+			v.enter_visit(n_c)
+			if not v.bstack.pop then break
+			v.enter_visit(n_stmts)
+		end
+	end
+end
+
+
+redef class Nc_and
+	redef fun accept_calculator(v) do
+		super
+		var b1 = v.bstack.pop
+		var b2 = v.bstack.pop
+		v.bstack.push(b1 and b2)
+	end
+end
+
+redef class Nc_or
+	redef fun accept_calculator(v) do
+		super
+		var b1 = v.bstack.pop
+		var b2 = v.bstack.pop
+		v.bstack.push(b1 or b2)
+	end
+end
+
+redef class Nc_not
+	redef fun accept_calculator(v) do
+		super
+		v.bstack.push(not v.bstack.pop)
+	end
+end
+
+redef class Nc_eq
+	redef fun accept_calculator(v) do
+		super
+		v.bstack.push(v.stack.pop == v.stack.pop)
+	end
+end
+
+redef class Nc_ne
+	redef fun accept_calculator(v) do
+		super
+		v.bstack.push(v.stack.pop != v.stack.pop)
+	end
+end
+
+redef class Nc_lt
+	redef fun accept_calculator(v) do
+		super
+		v.bstack.push(v.stack.pop > v.stack.pop)
+	end
+end
+
+redef class Nc_le
+	redef fun accept_calculator(v) do
+		super
+		v.bstack.push(v.stack.pop >= v.stack.pop)
+	end
+end
+
+redef class Nc_gt
+	redef fun accept_calculator(v) do
+		super
+		v.bstack.push(v.stack.pop < v.stack.pop)
+	end
+end
+
+redef class Nc_ge
+	redef fun accept_calculator(v) do
+		super
+		v.bstack.push(v.stack.pop <= v.stack.pop)
+	end
+end
+
+redef class Ne_add
+	redef fun accept_calculator(v) do
+		super
+		v.stack.push(v.stack.pop+v.stack.pop)
+	end
+end
+redef class Ne_sub
+	redef fun accept_calculator(v) do
+		super
+		var n1 = v.stack.pop
+		v.stack.push(v.stack.pop-n1)
+	end
+end
+redef class Ne_neg
+	redef fun accept_calculator(v) do
+		super
+		v.stack.push(-v.stack.pop)
+	end
+end
+redef class Ne_mul
+	redef fun accept_calculator(v) do
+		super
+		v.stack.push(v.stack.pop*v.stack.pop)
+	end
+end
+redef class Ne_div
+	redef fun accept_calculator(v) do
+		super
+		var n1 = v.stack.pop
+		v.stack.push(v.stack.pop/n1)
+	end
+end
+redef class Ne_var
+	redef fun accept_calculator(v) do
+		v.stack.push v.vars[n_id.text]
+	end
+end
+redef class Ne_read
+	redef fun accept_calculator(v) do
+		var t = gets
+		v.stack.push(t.to_i)
+	end
+end
+
+var t = new MyTest
+var n = t.main
+
+var v = new Interpretor 
+v.enter_visit(n)