[clang-tidy] Adding Fuchsia checker for trailing returns

Adds a check to the Fuchsia module to warn if a function has a trailing
return.

See https://fuchsia.googlesource.com/zircon/+/master/docs/cxx.md for
reference.

Differential Revision: https://reviews.llvm.org/D42116

llvm-svn: 322759
diff --git a/clang-tools-extra/clang-tidy/fuchsia/FuchsiaTidyModule.cpp b/clang-tools-extra/clang-tidy/fuchsia/FuchsiaTidyModule.cpp
index ab4aaff..0eed740 100644
--- a/clang-tools-extra/clang-tidy/fuchsia/FuchsiaTidyModule.cpp
+++ b/clang-tools-extra/clang-tidy/fuchsia/FuchsiaTidyModule.cpp
@@ -13,6 +13,7 @@
 #include "DefaultArgumentsCheck.h"
 #include "OverloadedOperatorCheck.h"
 #include "StaticallyConstructedObjectsCheck.h"
+#include "TrailingReturnCheck.h"
 #include "VirtualInheritanceCheck.h"
 
 using namespace clang::ast_matchers;
@@ -31,6 +32,8 @@
         "fuchsia-overloaded-operator");
     CheckFactories.registerCheck<StaticallyConstructedObjectsCheck>(
         "fuchsia-statically-constructed-objects");
+    CheckFactories.registerCheck<TrailingReturnCheck>(
+        "fuchsia-trailing-return");
     CheckFactories.registerCheck<VirtualInheritanceCheck>(
         "fuchsia-virtual-inheritance");
   }