potential Dictionary API improvements

Author: Waridley

gdnative-core/src/core_types/dictionary.rs

@@ -72,6 +72,14 @@ impl<Access: ThreadAccess> Dictionary<Access> {
     /// Returns a copy of the value corresponding to the key.
     #[inline]
     pub fn get<K>(&self, key: K) -> Variant
+    where
+        K: ToVariant + ToVariantEq,
+    {
+        self.get_or(Variant::new(), key)
+    }
+
+    #[inline]
+    pub fn get_or_insert_default<K>(&self, key: K) -> Variant
     where
         K: ToVariant + ToVariantEq,
     {
@@ -83,6 +91,36 @@ impl<Access: ThreadAccess> Dictionary<Access> {
         }
     }
 
+    /// Returns a copy of the value corresponding to the key, or `default` if it doesn't exist
+    #[inline]
+    pub fn get_or<K, D>(&self, default: D, key: K) -> Variant
+    where
+        K: ToVariant + ToVariantEq,
+        D: ToVariant + ToVariantEq,
+    {
+        unsafe {
+            Variant((get_api().godot_dictionary_get_with_default)(
+                self.sys(),
+                key.to_variant().sys(),
+                default.to_variant().sys(),
+            ))
+        }
+    }
+
+    /// Returns a copy of the value corresponding to the key if it exists and is not `Nil`, or `None` otherwise
+    #[inline]
+    pub fn get_or_none<K>(&self, key: K) -> Option<Variant>
+    where
+        K: ToVariant + ToVariantEq,
+    {
+        let result = self.get(key);
+        if result.is_nil() {
+            None
+        } else {
+            Some(result)
+        }
+    }
+
     /// Update an existing element corresponding ot the key.
     ///
     /// # Panics