[PING][PATCH] New plugin event when evaluating a constexpr call

[Jason Merrill]

On 05/06/2016 10:23 AM, Andres Tiraboschi wrote:
> +static tree
> +eval_call_plugin_callback (const constexpr_ctx *ctx, tree fun,
> +			   bool lval, bool *non_constant_p, bool *overflow_p)

This function needs a comment.

> -static void
> +void
>  cxx_bind_parameters_in_call (const constexpr_ctx *ctx, tree t,

Why expose this function?  If you want the reduced forms of the 
arguments in your plugin, can't you call cxx_eval_constant_expression on 
them directly?

Jason