From b9f3681728185d12265d0a35d327db00496b3ea7 Mon Sep 17 00:00:00 2001
From: Nick Alexander <nalexander@mozilla.com>
Date: Mon, 18 Jun 2018 14:52:16 -0700
Subject: [PATCH] Part 2: Allow to Deref StructuredMap to the underlying
 IndexMap.

Again, this is a fundamental Rust pattern for newtypes.  It's awfully
hard to actually use `StructuredMap` without it!
---
 core/src/types.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/core/src/types.rs b/core/src/types.rs
index 7efc26f2..15aec5ee 100644
--- a/core/src/types.rs
+++ b/core/src/types.rs
@@ -15,6 +15,11 @@ use ::std::convert::{
 use ::std::ffi::{
     CString,
 };
+
+use ::std::ops::{
+    Deref,
+};
+
 use ::std::os::raw::c_char;
 
 use ::std::rc::{
@@ -342,6 +347,14 @@ impl Binding {
 #[derive(Clone, Debug, Default, Eq, PartialEq)]
 pub struct StructuredMap(pub IndexMap<ValueRc<Keyword>, Binding>);
 
+impl Deref for StructuredMap {
+    type Target = IndexMap<ValueRc<Keyword>, Binding>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
 impl StructuredMap {
     pub fn insert<N, B>(&mut self, name: N, value: B) where N: Into<ValueRc<Keyword>>, B: Into<Binding> {
         self.0.insert(name.into(), value.into());