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## Class typed_value_base

boost::program_options::typed_value_base

## Synopsis

    // In header: <boost/program_options/value_semantic.hpp>

    class typed_value_base {
    public:
      // construct/copy/destruct
      ~typed_value_base();

      // public member functions
      virtual const std::type_info & value_type() const = 0;
    };

## Description

Base class for all option that have a fixed type, and are willing to announce this type to the outside world. Any 'value_semantics' for which you want to find out the type can be dynamic_cast-ed to typed_value_base. If conversion succeeds, the 'type' method can be called.

### `typed_value_base` public construct/copy/destruct

1.     ~typed_value_base();

### `typed_value_base` public member functions

1.     virtual const std::type_info & value_type() const = 0;