Add accessor for Lex::value

lexer/src/token.rs

@@ -24,4 +24,5 @@ impl Lex {
     }
 
     pub fn token(&self) -> Token { self.token }
+    pub fn value(&self) -> &str { self.value.as_str() }
 }

parser/src/lib.rs

@@ -9,10 +9,10 @@ mod node_parser;
 
 use std::iter::Peekable;
 use sibillexer::Result as LexerResult;
-use sibillexer::Token;
 use sibiltypes::Object;
 use node_parser::{NodeParser, IdParser, ListParser};
 
+/// The output of calling `parse()` on a Parser is one of these Result objects.
 pub type Result = std::result::Result<Object, ParseError>;
 
 #[derive(Debug)]