add module file

src/module.rs

@@ -0,0 +1,38 @@
+use std::rc::Rc;
+use std::path::PathBuf;
+use std::ffi::OsString;
+use std::vec;
+
+use syntex_syntax::{ast, ptr};
+
+#[derive(Default, Debug, Clone)]
+pub struct Module {
+    pub list: Vec<ptr::P<ast::Item>>,
+    pub path: Vec<OsString>,
+}
+
+impl From<(Vec<ptr::P<ast::Item>>, PathBuf)> for Module {
+    fn from((list, mut path): (Vec<ptr::P<ast::Item>>, PathBuf)) -> Module {
+        path.set_extension("");
+        Module {
+            list: list,
+            path: path.components()
+                      .skip(1)
+                      .map(|comp| comp.as_os_str().to_os_string())
+                      .collect::<Vec<OsString>>(),
+        }
+    }
+}
+
+impl IntoIterator for Module {
+    type Item = (ptr::P<ast::Item>, Rc<Vec<OsString>>);
+    type IntoIter = vec::IntoIter<(ptr::P<ast::Item>, Rc<Vec<OsString>>)>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        let ref rc: Rc<Vec<OsString>> = Rc::new(self.path);
+        self.list.into_iter()
+                 .map(|item| (item, Rc::clone(rc)))
+                 .collect::<Vec<(ptr::P<ast::Item>, Rc<Vec<OsString>>)>>()
+                 .into_iter()
+    }
+}