fix three args for call

lib/parser/expression.citrus

@@ -2,16 +2,16 @@ grammar Expression
   include Keywords
 
   rule more_args
-    list:(comma basic_expression )1* {
-      capture(:basic_expression).value
+    (comma basic_expression )* {
+      captures(:basic_expression).collect{|u| u.value }
     }
   end
 
   rule argument_list
-    (left_parenthesis basic_expression? more_args? right_parenthesis){
+    (left_parenthesis basic_expression? more_args right_parenthesis){
         args = [ ]
         args << capture(:basic_expression).value if capture(:basic_expression)
-        args << capture(:more_args).value if capture(:more_args)
+        args += capture(:more_args).value if capture(:more_args)
         args
         }
   end

test/unit/test_call_site.rb

@@ -36,7 +36,7 @@ class TestCallSite < MiniTest::Test
     check
   end
 
-  def test_call_site_multi
+  def test_call_site_2
     @input = 'self.baz(42, foo)'
     @output = Ast::CallSiteExpression.new :baz,
                            [Ast::IntegerExpression.new(42), Ast::NameExpression.new("foo") ] ,
@@ -44,4 +44,14 @@ class TestCallSite < MiniTest::Test
     check
   end
 
+  def test_call_site_3
+    @input = 'self.baz(42, foo , bar)'
+    @output = Ast::CallSiteExpression.new :baz,
+                           [Ast::IntegerExpression.new(42) ,
+                               Ast::NameExpression.new("foo") ,
+                               Ast::NameExpression.new("bar")] ,
+                           Ast::NameExpression.new(:self)
+    check
+  end
+
 end