Boost C++ Libraries

Obtain a polymorphic wrapper with the specified property.

template<
    typename Property>
any_io_executor require(
    const Property & p,
    constraint_t< traits::require_member< const base_type &, const Property & >::is_valid >  = 0) const;
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template<>
any_io_executor require(
    const execution::blocking_t::never_t & p,
    int ) const;
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any_executor require(
    Property ) const;
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