From b8a50c7614426c611143eb846839b56ec6c50c0d Mon Sep 17 00:00:00 2001
From: David Vacca <dvacca@fb.com>
Date: Wed, 15 Aug 2018 17:50:00 -0700
Subject: [PATCH] Improve error message when a component descriptor is not
 implemented

Summary: This diff improves the error message that is displayed when a component descriptor is not implemented in C++

Reviewed By: shergin

Differential Revision: D9093562

fbshipit-source-id: 930b381bc66c20af6fa160b09e7484bad4666e28
---
 .../fabric/uimanager/ComponentDescriptorRegistry.cpp        | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ReactCommon/fabric/uimanager/ComponentDescriptorRegistry.cpp b/ReactCommon/fabric/uimanager/ComponentDescriptorRegistry.cpp
index a41c4311a6b..357f7ec71c5 100644
--- a/ReactCommon/fabric/uimanager/ComponentDescriptorRegistry.cpp
+++ b/ReactCommon/fabric/uimanager/ComponentDescriptorRegistry.cpp
@@ -22,7 +22,11 @@ const SharedComponentDescriptor ComponentDescriptorRegistry::operator[](const Sh
 }
 
 const SharedComponentDescriptor ComponentDescriptorRegistry::operator[](const ComponentName &componentName) const {
-  return _registryByName.at(componentName);
+  auto it = _registryByName.find(componentName);
+  if (it == _registryByName.end()) {
+     throw std::invalid_argument(("Unable to find componentDescriptor for " + componentName).c_str());
+   }
+   return it->second;
 }
 
 } // namespace react