From 872fad049e671f201fc35b57a424069b2954dc49 Mon Sep 17 00:00:00 2001
From: Chris Holcombe <xfactor973@gmail.com>
Date: Mon, 3 Sep 2018 19:09:38 -0700
Subject: [PATCH] Fix extern crate in root namespace (#4905)

Imports the Rust FlatBuffers runtime crate even when not using a namespace in a schema.
---
 src/idl_gen_rust.cpp                               | 3 +++
 tests/monster_test_generated.rs                    | 4 ++++
 tests/monster_test_my_game.example2_generated.dart | 2 +-
 tests/monster_test_my_game_generated.dart          | 2 +-
 tests/namespace_test/namespace_test1_generated.rs  | 4 ++++
 tests/namespace_test/namespace_test2_generated.rs  | 4 ++++
 6 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/idl_gen_rust.cpp b/src/idl_gen_rust.cpp
index 1441af492..c3d733d12 100644
--- a/src/idl_gen_rust.cpp
+++ b/src/idl_gen_rust.cpp
@@ -271,6 +271,9 @@ class RustGenerator : public BaseGenerator {
   bool generate() {
     code_.Clear();
     code_ += "// " + std::string(FlatBuffersGeneratedWarning()) + "\n\n";
+    code_ += "#![allow(dead_code)]";
+    code_ += "#![allow(unused_imports)]";
+    code_ += "extern crate flatbuffers;\n";
 
     assert(!cur_name_space_);
 
diff --git a/tests/monster_test_generated.rs b/tests/monster_test_generated.rs
index aa236a20c..b66f99aa2 100644
--- a/tests/monster_test_generated.rs
+++ b/tests/monster_test_generated.rs
@@ -1,6 +1,10 @@
 // automatically generated by the FlatBuffers compiler, do not modify
 
 
+#![allow(dead_code)]
+#![allow(unused_imports)]
+extern crate flatbuffers;
+
 pub mod my_game {
   #![allow(dead_code)]
   #![allow(unused_imports)]
diff --git a/tests/monster_test_my_game.example2_generated.dart b/tests/monster_test_my_game.example2_generated.dart
index 857e66d56..eed14bc2c 100644
--- a/tests/monster_test_my_game.example2_generated.dart
+++ b/tests/monster_test_my_game.example2_generated.dart
@@ -6,8 +6,8 @@ library my_game.example2;
 import 'dart:typed_data' show Uint8List;
 import 'package:flat_buffers/flat_buffers.dart' as fb;
 
-import './monster_test_my_game.example_generated.dart' as my_game_example;
 import './monster_test_my_game_generated.dart' as my_game;
+import './monster_test_my_game.example_generated.dart' as my_game_example;
 
 class Monster {
   Monster._(this._bc, this._bcOffset);
diff --git a/tests/monster_test_my_game_generated.dart b/tests/monster_test_my_game_generated.dart
index abd538c49..425bae33e 100644
--- a/tests/monster_test_my_game_generated.dart
+++ b/tests/monster_test_my_game_generated.dart
@@ -6,8 +6,8 @@ library my_game;
 import 'dart:typed_data' show Uint8List;
 import 'package:flat_buffers/flat_buffers.dart' as fb;
 
-import './monster_test_my_game.example_generated.dart' as my_game_example;
 import './monster_test_my_game.example2_generated.dart' as my_game_example2;
+import './monster_test_my_game.example_generated.dart' as my_game_example;
 
 class InParentNamespace {
   InParentNamespace._(this._bc, this._bcOffset);
diff --git a/tests/namespace_test/namespace_test1_generated.rs b/tests/namespace_test/namespace_test1_generated.rs
index b7e88e9f6..e10e5558c 100644
--- a/tests/namespace_test/namespace_test1_generated.rs
+++ b/tests/namespace_test/namespace_test1_generated.rs
@@ -1,6 +1,10 @@
 // automatically generated by the FlatBuffers compiler, do not modify
 
 
+#![allow(dead_code)]
+#![allow(unused_imports)]
+extern crate flatbuffers;
+
 pub mod namespace_a {
   #![allow(dead_code)]
   #![allow(unused_imports)]
diff --git a/tests/namespace_test/namespace_test2_generated.rs b/tests/namespace_test/namespace_test2_generated.rs
index c516d80e6..abcd5c66f 100644
--- a/tests/namespace_test/namespace_test2_generated.rs
+++ b/tests/namespace_test/namespace_test2_generated.rs
@@ -1,6 +1,10 @@
 // automatically generated by the FlatBuffers compiler, do not modify
 
 
+#![allow(dead_code)]
+#![allow(unused_imports)]
+extern crate flatbuffers;
+
 pub mod namespace_a {
   #![allow(dead_code)]
   #![allow(unused_imports)]