Alias template issue involving non-type template parameter and two levels of template aliasing. - by Cassio Neri

Status : 

  Fixed<br /><br />
		This item has been fixed in the current or upcoming version of this product.<br /><br />
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ID 808130 Comments
Status Closed Workarounds
Type Bug Repros 0
Opened 11/8/2013 3:43:27 PM
Access Restriction Public


The code below fails to compile (but it does with gcc 4.8.1, clang 3.3 and icc 13.1.1) yielding the following:

error C2955: 'bar' : use of alias template requires template argument list

It seems that the main ingredients for this error two occur are:

1. A non-type template parameter ('bool' of 'foo');
2. Two levels of template aliasing ('baz' alias 'bar' which alias 'foo').

Given the error message (C2955) this bug might be a duplicate of 

#include <type_traits>

template <bool>
struct foo {};

template <typename T>
using bar = foo<std::is_scalar<T>::value>;

template <typename T>
using baz = bar<T>;
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Posted by Microsoft on 11/10/2013 at 6:36 PM
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Posted by Microsoft on 11/8/2013 at 3:51 PM
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