From 4e2440daec173e3fd6d24f8f5d14150a9e8e19cf Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nick@wasmer.io>
Date: Mon, 25 Nov 2019 14:46:16 -0800
Subject: [PATCH] Add a 'clear' method to map.

---
 lib/runtime-core/src/structures/map.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/runtime-core/src/structures/map.rs b/lib/runtime-core/src/structures/map.rs
index b3f20b5cb..08773b50a 100644
--- a/lib/runtime-core/src/structures/map.rs
+++ b/lib/runtime-core/src/structures/map.rs
@@ -37,6 +37,11 @@ where
         }
     }
 
+    /// Clears the map. Keeps the allocated memory for future use.
+    pub fn clear(&mut self) {
+        self.elems.clear();
+    }
+
     /// Returns the size of this map.
     pub fn len(&self) -> usize {
         self.elems.len()