On Wed, Apr 11, 2018 at 11:59 AM, Peter Sommerlad <peter.sommerlad@hsr.ch> wrote:

We are trying, but even things that could help such as source_location did not make it so far. Any hope for that feature? I couldn’t follow what happened with it.

It is in n4617 Library Fundamentals v2 with tag [reflection.src_loc].
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 Nevin ":-)" Liber  <mailto:nevin@eviloverlord.com>  +1-847-691-1404