////
Copyright 2019, 2021 Peter Dimov
Distributed under the Boost Software License, Version 1.0.
http://www.boost.org/LICENSE_1_0.txt
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[#changes]
# Revision History
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## Changes in 1.79.0

* `source_location().file_name()` and `source_location().function_name()`
  now return `""` instead of `"(unknown)"`.
* Added a `source_location` constructor from `std::source_location`.
* Changed `BOOST_CURRENT_LOCATION` to more closely match the behavior of
  `std::source_location::current()`, such as being usable at top level or
  as a default function argument.

## Changes in 1.78.0

* Added `source_location::to_string`.

## Changes in 1.73.0

* Added `source_location`.