[boost] [gil] where is the mysterious boost::gil::read_image function?

Subject: [boost] [gil] where is the mysterious boost::gil::read_image function?
From: Frédéric Bron (frederic.bron_at_[hidden])
Date: 2017-05-31 10:07:34

I would like to read a jpeg image from a memory location, not from a file.
According to this post
http://boost.2283326.n4.nabble.com/gil-io-new-review-Reading-images-from-in-memory-sources-td3073639.html
there is a boost::gil::read_image(input_stream, image, image_tag)
function but I cannot find it in the header files.

Thanks,

Frédéric