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authorHenrik Edin <henrik.edin@mongodb.com>2018-12-13 11:44:21 -0500
committerHenrik Edin <henrik.edin@mongodb.com>2018-12-18 09:12:51 -0500
commitc28cb6852fca219d6f0262000c378e982b7ca9ff (patch)
treee06e74d1729e644db7c4dc2e5ecd529145b2f34c /src/third_party/boost-1.69.0/boost/lambda/detail/select_functions.hpp
parent05ebfef11161b96ba0e8374f34c359a403097f60 (diff)
downloadmongo-c28cb6852fca219d6f0262000c378e982b7ca9ff.tar.gz
SERVER-38458 Upgrade boost to version 1.69
Diffstat (limited to 'src/third_party/boost-1.69.0/boost/lambda/detail/select_functions.hpp')
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+// -- select_functions.hpp -- Boost Lambda Library --------------------------
+
+// Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// For more information, see http://www.boost.org
+
+
+#ifndef BOOST_LAMBDA_SELECT_FUNCTIONS_HPP
+#define BOOST_LAMBDA_SELECT_FUNCTIONS_HPP
+
+namespace boost {
+namespace lambda {
+namespace detail {
+
+
+// select functions -------------------------------
+template<class Any, CALL_TEMPLATE_ARGS>
+inline Any& select(Any& any, CALL_FORMAL_ARGS) { CALL_USE_ARGS; return any; }
+
+
+template<class Arg, CALL_TEMPLATE_ARGS>
+inline typename Arg::template sig<tuple<CALL_REFERENCE_TYPES> >::type
+select ( const lambda_functor<Arg>& op, CALL_FORMAL_ARGS ) {
+ return op.template call<
+ typename Arg::template sig<tuple<CALL_REFERENCE_TYPES> >::type
+ >(CALL_ACTUAL_ARGS);
+}
+template<class Arg, CALL_TEMPLATE_ARGS>
+inline typename Arg::template sig<tuple<CALL_REFERENCE_TYPES> >::type
+select ( lambda_functor<Arg>& op, CALL_FORMAL_ARGS) {
+ return op.template call<
+ typename Arg::template sig<tuple<CALL_REFERENCE_TYPES> >::type
+ >(CALL_ACTUAL_ARGS);
+}
+
+// ------------------------------------------------------------------------
+// select functions where the return type is explicitly given
+// Note: on many functions, this return type is just discarded.
+// The select functions are inside a class template, and the return type
+// is a class template argument.
+// The first implementation used function templates with an explicitly
+// specified template parameter.
+// However, this resulted in ambiguous calls (at least with gcc 2.95.2
+// and edg 2.44). Not sure whether the compilers were right or wrong.
+
+template<class RET> struct r_select {
+
+// Any == RET
+ template<class Any, CALL_TEMPLATE_ARGS>
+ static
+ inline RET go (Any& any, CALL_FORMAL_ARGS) { CALL_USE_ARGS; return any; }
+
+
+ template<class Arg, CALL_TEMPLATE_ARGS>
+ static
+ inline RET go (const lambda_functor<Arg>& op, CALL_FORMAL_ARGS ) {
+ return op.template call<RET>(CALL_ACTUAL_ARGS);
+ }
+ template<class Arg, CALL_TEMPLATE_ARGS>
+ static
+ inline RET go (lambda_functor<Arg>& op, CALL_FORMAL_ARGS ) {
+ return op.template call<RET>(CALL_ACTUAL_ARGS);
+ }
+};
+
+} // namespace detail
+} // namespace lambda
+} // namespace boost
+
+#endif