clear

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Boost C++ Libraries

clear

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clear returns an empty sequence.

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template<
    typename Sequence
    >
typename result_of::clear<Sequence const>::type clear(Sequence const& seq);

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Table 1.62. Parameters

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Table 1.62. Parameters

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Table 1.66. Parameters

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Table 1.66. Parameters

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Table 1.66. Parameters

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Table 1.66. Parameters

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Table 1.66. Parameters

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Parameter	Requirement	Description
`seq`	A model of Forward Sequence	Operation's argument

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Expression =======

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clear(seq);

Return type: A model of Forward Sequence.

Expression Semantics: Returns a sequence with no elements.

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Constant.

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#include <boost/fusion/algorithm/transformation/clear.hpp>
#include <boost/fusion/include/clear.hpp>

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assert(clear(make_vector(1,2,3)) == make_vector());