Merge pull request #284 from koto-lang/kmap-clear

Add the ability to clear the runtime's exports map

CHANGELOG.md

@@ -27,6 +27,7 @@ The Koto project adheres to
   it easier to implement `KotoObject`s.
 - `Koto::run_instance_function` has been added.
 - `Ptr`/`PtrMut` now have an associated `ref_count` function.
+- `KMap::clear` has been added.
 
 #### Core Library
 

crates/koto/src/koto.rs

@@ -73,6 +73,11 @@ impl Koto {
         self.runtime.exports()
     }
 
+    /// Returns a reference to the runtime's exports
+    pub fn exports_mut(&mut self) -> &mut KMap {
+        self.runtime.exports_mut()
+    }
+
     /// Compiles a Koto script, returning the complied chunk if successful
     ///
     /// On success, the chunk is cached as the current chunk for subsequent calls to [Koto::run].

crates/runtime/src/types/map.rs

@@ -162,6 +162,12 @@ impl KMap {
         self.data().is_empty()
     }
 
+    /// Removes all contents from the data map, and removes the meta map
+    pub fn clear(&mut self) {
+        self.data_mut().clear();
+        self.meta = None;
+    }
+
     /// Returns true if the provided KMap occupies the same memory address
     pub fn is_same_instance(&self, other: &Self) -> bool {
         PtrMut::ptr_eq(&self.data, &other.data)

crates/runtime/src/vm.rs

@@ -189,6 +189,11 @@ impl KotoVm {
         &self.exports
     }
 
+    /// Returns a mutable reference to the active module's exports map
+    pub fn exports_mut(&mut self) -> &mut KMap {
+        &mut self.exports
+    }
+
     /// The stdin wrapper used by the VM
     pub fn stdin(&self) -> &Ptr<dyn KotoFile> {
         &self.context.settings.stdin