Add ruby class methods

Ruby parser and ruby level for #24

lib/ruby.rb

@@ -21,7 +21,7 @@ require_relative "ruby/while_statement"
 require_relative "ruby/basic_values"
 require_relative "ruby/hash_statement"
 require_relative "ruby/method_statement"
-require_relative "ruby/ruby_compiler"
+require_relative "ruby/class_method_statement"
 require_relative "ruby/call_statement"
 require_relative "ruby/send_statement"
 require_relative "ruby/yield_statement"

lib/ruby/class_method_statement.rb

@@ -0,0 +1,14 @@
+module Ruby
+  class ClassMethodStatement < MethodStatement
+
+    def to_vool
+#      Vool::ClassMethodStatement.new( @name , @args.dup , @body.to_vool)
+    end
+
+    def to_s(depth = 0)
+      arg_str = @args.collect{|a| a.to_s}.join(', ')
+      at_depth(depth , "def self.#{name}(#{arg_str})" , @body.to_s(depth + 1) , "end")
+    end
+
+  end
+end

lib/ruby/ruby_compiler.rb

@@ -54,6 +54,13 @@ module Ruby
       MethodStatement.new( name , arg_array , process(body) )
     end
 
+    def on_defs( statement )
+      me , name , args , body = *statement
+      raise "only class method implemented, not #{me.type}" unless me.type == :self
+      arg_array = process_all( args )
+      ClassMethodStatement.new( name , arg_array , process(body) )
+    end
+
     def on_arg( arg )
       arg.first
     end

lib/vool/class_statement.rb

@@ -38,6 +38,9 @@ module Vool
         #existing class, don't overwrite type (parfait only?)
       else
         @clazz = Parfait.object_space.create_class(@name , @super_class_name )
+        #TODO this should start from Object Type and add one name at a time.
+        # So the "trail" of types leading to this one exists.
+        # Also the Class always has a valid type.
         ivar_hash = {}
         self.each do |node|
           next unless node.is_a?(InstanceVariable) or node.is_a?(IvarAssignment)

test/ruby/test_method_statement.rb

@@ -53,4 +53,18 @@ module Ruby
       assert_equal LocalAssignment , lst.body.class
     end
   end
+  class TestClassMethodStatement < MiniTest::Test
+    include RubyTests
+
+    def test_basic_method
+      input = "def self.tryout() ; return true ; end "
+      @lst = compile( input )
+      assert_equal Ruby::ClassMethodStatement , @lst.class
+    end
+    def test_method_arg
+      input = "def self.tryout(arg) ; arg = true ; return arg ; end "
+      @lst = compile( input )
+      assert_equal Ruby::ClassMethodStatement , @lst.class
+    end
+  end
 end