1 files changed, 41 insertions, 0 deletions
diff --git a/src/rpntree.rs b/src/rpntree.rs
new file mode 100644
index 0000000..5b74bfd
--- /dev/null
+++ b/src/rpntree.rs
@@ -0,0 +1,41 @@
+use std::collections::HashMap;
+mod types;
+use types::tree::Tree;
+
+fn reducer_string(opt_left: Option<String>, center: char, opt_right: Option<String>) -> String {
+    format!(
+        "{}{}{}",
+        opt_left.unwrap_or_else(|| { "".to_string() }),
+        opt_right.unwrap_or_else(|| { "".to_string() }),
+        center,
+    )
+}
+
+pub fn test() {
+    println!("adding characters to the binary tree");
+    // let PRIO_MAP: HashMap<char, usize> = HashMap::new();
+    let mut tree = Tree::new('+');
+    let _ = &tree.root_node.insert_left('a');
+    let _ = &tree.root_node.insert_right('b');
+    println!("{}", &tree);
+    let result = tree.reduce::<String>(reducer_string);
+    println!("{}", result);
+}
+pub fn eval_rpn(rpnstr: String) -> Result<String, String> {
+    let mut priority_map = HashMap::<char, usize>::new();
+    priority_map.insert('+', 100);
+    priority_map.insert('-', 100);
+    priority_map.insert('*', 200);
+    priority_map.insert('/', 200);
+    println!("Priority map: {:?}", priority_map);
+    let waiting_stack: Vec<char> = vec![];
+    for c in rpnstr.chars() {
+        if priority_map.contains_key(&c) {
+            let priority = match priority_map.get(&c) {
+                Some(c_ptr) => c_ptr.to_owned(),
+                None => return Err("Internal error".to_string()),
+            };
+        }
+    }
+    Ok("Hello".to_string())
+}