From 064027e77b278e1dc18131c66d18659b8657af6c Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Sun, 31 May 2020 22:31:05 -0400
Subject: [PATCH] Worked around a lifetime issue with into_context_element.

---
 src/renderer/context_element.rs    | 16 ++++++++--------
 src/renderer/parameters_context.rs | 15 ++++++++++-----
 2 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/src/renderer/context_element.rs b/src/renderer/context_element.rs
index 27249d1..49cc72d 100644
--- a/src/renderer/context_element.rs
+++ b/src/renderer/context_element.rs
@@ -101,19 +101,19 @@ impl<C: ContextElement> FromContextElement for C {
 }
 
 pub trait IntoContextElement: Debug + Walkable /* + CloneIntoBoxedContextElement*/ {
-    fn into_context_element(
-        &self,
+    fn into_context_element<'a>(
+        &'a self,
         renderer: &DustRenderer,
-        breadcrumbs: Option<&BreadcrumbTree>,
-    ) -> Option<&dyn ContextElement>;
+        breadcrumbs: Option<&'a BreadcrumbTree<'a>>,
+    ) -> Option<&'a dyn ContextElement>;
 }
 
 impl<C: ContextElement> IntoContextElement for C {
-    fn into_context_element(
-        &self,
+    fn into_context_element<'a>(
+        &'a self,
         renderer: &DustRenderer,
-        breadcrumbs: Option<&BreadcrumbTree>,
-    ) -> Option<&dyn ContextElement> {
+        breadcrumbs: Option<&'a BreadcrumbTree<'a>>,
+    ) -> Option<&'a dyn ContextElement> {
         Some(self)
     }
 }
diff --git a/src/renderer/parameters_context.rs b/src/renderer/parameters_context.rs
index f07f2c2..3b7b7ba 100644
--- a/src/renderer/parameters_context.rs
+++ b/src/renderer/parameters_context.rs
@@ -6,6 +6,7 @@ use crate::renderer::breadcrumb_tree::BreadcrumbTree;
 use crate::renderer::context_element::CompareContextElement;
 use crate::renderer::context_element::ContextElement;
 use crate::renderer::context_element::IntoContextElement;
+use crate::renderer::tree_walking::walk_path;
 use crate::renderer::DustRenderer;
 use crate::renderer::Loopable;
 use crate::renderer::RenderError;
@@ -32,16 +33,20 @@ impl<'a> ParametersContext<'a> {
 }
 
 impl<'a> IntoContextElement for RValue<'a> {
-    fn into_context_element(
-        &self,
+    fn into_context_element<'b>(
+        &'b self,
         renderer: &DustRenderer,
-        breadcrumbs: Option<&BreadcrumbTree>,
-    ) -> Option<&dyn ContextElement> {
+        breadcrumbs: Option<&'b BreadcrumbTree<'b>>,
+    ) -> Option<&'b dyn ContextElement> {
         match self {
             RValue::RVLiteral(owned_literal) => Some(owned_literal),
-            RValue::RVPath(path) => todo!(),
+            RValue::RVPath(path) => walk_path(breadcrumbs, &path.keys)
+                .map(|ice| ice.into_context_element(renderer, breadcrumbs))
+                .ok()
+                .flatten(),
             RValue::RVTemplate(template) => todo!(),
         }
+        // todo!()
     }
 }