Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Function polymorphic_strict_get

boost::polymorphic_strict_get — Retrieves a value of a specified type from a given variant.

Synopsis

// In header: <boost/variant/polymorphic_get.hpp>


template<typename U, typename T1, typename T2, ..., typename TN> 
  U * polymorphic_strict_get(variant<T1, T2, ..., TN> * operand);
template<typename U, typename T1, typename T2, ..., typename TN> 
  const U * polymorphic_strict_get(const variant<T1, T2, ..., TN> * operand);
template<typename U, typename T1, typename T2, ..., typename TN> 
  U & polymorphic_strict_get(variant<T1, T2, ..., TN> & operand);
template<typename U, typename T1, typename T2, ..., typename TN> 
  const U & polymorphic_strict_get(const variant<T1, T2, ..., TN> & operand);

Description

Acts exactly like polymorphic_relaxed_get but does a compile time check that type U is one of the types that can be stored in variant.