Re: C++ PATCH to deal with trivial but non-callable [cd]tors

[Jason Merrill <jason at redhat dot com>]

On 10/30/2013 06:14 AM, Eric Botcazou wrote:
> +/* Return whether DECL, a method of a C++ TYPE, is trivial, that is to say
> +   doesn't do anything for the objects of TYPE.  */
> +
> +static bool
> +is_trivial_method (const_tree decl, const_tree type)
> +{
> +  if (cpp_check (decl, IS_CONSTRUCTOR) && !TYPE_NEEDS_CONSTRUCTING (type))
> +    return true;

This will tell you whether decl is a constructor for a type with some 
non-trivial constructor, but not whether decl itself is non-trivial.

I think a good way to check for any non-trivial methods would be to 
check trivial_type_p in the front end and then see if there are any 
!DECL_ARTIFICIAL decls in TYPE_METHODS.

Jason