Re: [PATCH] c++/58109 - alignas() fails to compile with constant expression

[Jason Merrill]

On 12/22/2015 09:32 PM, Martin Sebor wrote:
+  if (is_attribute_p ("aligned", name)
+      || is_attribute_p ("vector_size", name))
+    {
+      /* Attribute argument may be a dependent indentifier.  */
+      if (tree t = args ? TREE_VALUE (args) : NULL_TREE)
+       if (value_dependent_expression_p (t)
+           || type_dependent_expression_p (t))
+         return true;
+    }

Instead of this, is_late_template_attribute should be fixed to check 
attribute_takes_identifier_p.

Jason