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Only issue the deprecation message when BOOST_BIND_GLOBAL_PLACEHOLDERS isn't defined

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Peter Dimov
2020-02-16 18:13:43 +02:00
parent 5612ee45e5
commit 2797f0dc33
1 changed files with 14 additions and 3 deletions
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17
include/boost/bind.hpp
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@@ -23,14 +23,25 @@
// namespace are not a good practice and this use is deprecated.
// Please switch to including <boost/bind/bind.hpp> directly,
// adding the using directive locally where appropriate.
#include <boost/config/header_deprecated.hpp>
BOOST_HEADER_DEPRECATED( "<boost/bind/bind.hpp>" )
// Alternatively, the existing behavior may be preserved by defining
// the macro BOOST_BIND_GLOBAL_PLACEHOLDERS.
#include <boost/bind/bind.hpp>
#include <boost/config/pragma_message.hpp>
#ifndef BOOST_BIND_NO_PLACEHOLDERS
#if !defined(BOOST_BIND_GLOBAL_PLACEHOLDERS)
BOOST_PRAGMA_MESSAGE(
"The practice of declaring the Bind placeholders (_1, _2, ...) "
"in the global namespace is deprecated. Please use "
"<boost/bind/bind.hpp> + using namespace boost::placeholders, "
"or define BOOST_BIND_GLOBAL_PLACEHOLDERS to retain the current behavior."
)
#endif
#if defined(BOOST_CLANG)
# pragma clang diagnostic push
# if __has_warning("-Wheader-hygiene")