tree ba0aeb9d81cfe42f753789755a6e47395645ea07
parent 1e95421889b3f14224cd02984bf713375092f06d
author Rian Quinn <rianquinn@gmail.com> 1476816765 -0600
committer Neil MacIntosh <neilmac@microsoft.com> 1476816765 -0700

[gsl_util] Update narrow_cast to use std::forward 

* Update narrow_cast to use std::forward

Based on [F19](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#f19-for-forward-parameters-pass-by-tp-and-only-stdforward-the-parameter), I believe `gsl::narrow_cast` should be implemented using forward semantics.

* Fix for VS 2013