forked from boostorg/core
30 lines
864 B
Plaintext
30 lines
864 B
Plaintext
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[section:ignore_unused Header <boost/core/ignore_unused.hpp>]
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The header `<boost/core/ignore_unused.hpp>` defines the function template
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`boost::ignore_unused()`. It may be used to suppress the "unused variable" or
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"unused local typedefs" compiler warnings when the variable or typedef
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can't be removed or commented out, e.g. when some blocks of the code are
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conditionally activated. C++11 variadic templates are used if they're supported,
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otherwise they're emulated with overloads.
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`boost::ignore_unused()` was contributed by Adam Wulkiewicz.
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Usage
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boost::ignore_unused(v1, v2, v3);
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boost::ignore_unused<T1, T2, T3>();
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Example
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int fun( int foo, int bar )
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{
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boost::ignore_unused(bar);
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#ifdef ENABLE_DEBUG_OUTPUT
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if ( foo < bar )
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std::cerr << "warning! foo < bar";
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#endif
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return foo + 2;
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}
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[endsect]
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