Boost C++ Libraries

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This is an older version of Boost and was released in 2013. The current version is 1.90.0.

Struct template placeholder

Struct template placeholder

boost::xpressive::placeholder

Synopsis

// In header: <boost/xpressive/regex_actions.hpp>

template<typename T, int I, typename Dummy> 
struct placeholder {
  // types
  typedef placeholder< T, I, Dummy > this_type;      
  typedef unspecified                action_arg_type;
};

Description

placeholder<T>, for defining a placeholder to stand in fo a variable of type T in a semantic action.