Boost C++ Libraries

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This is an older version of Boost and was released in 2021. The current version is 1.90.0.

Function template contains

Function template contains

boost::log::expressions::contains

Synopsis

// In header: <boost/log/expressions/predicates/contains.hpp>


template<typename T, typename FallbackPolicyT, typename TagT, 
         template< typename > class ActorT, typename SubstringT> 
  unspecified contains(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const & attr, 
                       SubstringT const & substring);

Description

The function generates a terminal node in a template expression. The node will check if the attribute value, which is assumed to be a string, contains the specified substring.