Fix dockerfile for xml schema validator

lib/xml_schema_validator/src/lib.rs

@@ -4,6 +4,7 @@
 //! A streaming XML validator that checks XML fragments against an XSD schema
 
 mod error;
+mod python;
 mod schema;
 mod token;
 
@@ -13,7 +14,7 @@ use token::*;
 /// An XML validator that checks XML fragments against an XSD schema
 #[derive(Clone, Debug)]
 pub struct XmlValidator {
-    current_tokens: Vec<std::rc::Rc<Token>>,
+    current_tokens: Vec<Box<Token>>,
 }
 
 /// The Result type used throughout this crate
@@ -26,10 +27,9 @@ impl XmlValidator {
     pub fn new(schema_text: &str) -> Result<Self> {
         let schema: schema::XsSchema = quick_xml::de::from_str(schema_text)?;
         let current_tokens = schema.xs_element.iter().map(|element| {
-            std::rc::Rc::new(Token::StartOfFile(StartOfFile::new(std::rc::Rc::new(element.clone()))))
+            Box::new(Token::StartOfFile(StartOfFile::new(Box::new(element.clone()))))
         }).collect();
         
-        //let current_tokens = vec![std::rc::Rc::new(Token::StartOfFile(StartOfFile))];
         Ok(Self {
             current_tokens,
         })