| [/ |
| Copyright 2014 Adam Wulkiewicz |
| |
| Distributed under the Boost Software License, Version 1.0. |
| |
| See accompanying file LICENSE_1_0.txt |
| or copy at http://boost.org/LICENSE_1_0.txt |
| ] |
| |
| [section:ignore_unused ignore_unused] |
| |
| [simplesect Authors] |
| |
| * Adam Wulkiewicz |
| |
| [endsimplesect] |
| |
| [section Header <boost/core/ignore_unused.hpp>] |
| |
| The header `<boost/core/ignore_unused.hpp>` defines the function template |
| `boost::ignore_unused()`. It may be used to suppress the "unused variable" or |
| "unused local typedefs" compiler warnings when the variable or typedef |
| can't be removed or commented out, e.g. when some blocks of the code are |
| conditionally activated. C++11 variadic templates are used if they're supported, |
| otherwise they're emulated with overloads. |
| |
| [section Usage] |
| |
| `` |
| boost::ignore_unused(v1, v2, v3); |
| boost::ignore_unused<T1, T2, T3>(); |
| `` |
| |
| [endsect] |
| |
| [section Example] |
| |
| `` |
| int fun( int foo, int bar ) |
| { |
| boost::ignore_unused(bar); |
| #ifdef ENABLE_DEBUG_OUTPUT |
| if ( foo < bar ) |
| std::cerr << "warning! foo < bar"; |
| #endif |
| return foo + 2; |
| } |
| `` |
| |
| [endsect] |
| |
| [endsect] |
| |
| [section Acknowledgments] |
| |
| `boost::ignore_unused()` was contributed by Adam Wulkiewicz. |
| |
| [endsect] |
| |
| [endsect] |