moving to desktop

src/util/name_stack.rs

@@ -0,0 +1,17 @@
+use std::collections::HashMap;
+
+pub struct NameStack<T>(Vec<HashMap<String, T>>);
+
+impl<T> NameStack<T> {
+    pub fn new() -> Self {
+        Self(Vec::new())
+    }
+    pub fn search(&self, name: &str) -> Option<&T> {
+        for level in self.0.iter().rev() {
+            if let Some(v) = level.get(name) {
+                return Some(v);
+            }
+        }
+        None
+    }
+}