feat: get_policies: Way to obtain policy files and content (#267)

closes #254

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

src/lexer.rs

@@ -20,6 +20,7 @@ struct SourceInternal {
     pub lines: Vec<(u32, u32)>,
 }
 
+/// A policy file.
 #[derive(Clone)]
 #[cfg_attr(feature = "ast", derive(serde::Serialize))]
 pub struct Source {
@@ -27,6 +28,18 @@ pub struct Source {
     src: Rc<SourceInternal>,
 }
 
+impl Source {
+    /// The path associated with the policy file.
+    pub fn get_path(&self) -> &String {
+        &self.src.file
+    }
+
+    /// The contents of the policy file.
+    pub fn get_contents(&self) -> &String {
+        &self.src.contents
+    }
+}
+
 impl cmp::Ord for Source {
     fn cmp(&self, other: &Source) -> cmp::Ordering {
         Rc::as_ptr(&self.src).cmp(&Rc::as_ptr(&other.src))