Function bool_switch

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## Function bool_switch

boost::program_options::bool_switch —

## Synopsis

    BOOST_PROGRAM_OPTIONS_DECL typed_value< bool > * bool_switch();
    BOOST_PROGRAM_OPTIONS_DECL typed_value< bool > * bool_switch(bool * v);

## Description

Works the same way as the 'value' function, but the created value_semantic won't accept any explicit value. So, if the option is present on the command line, the value will be 'true'.

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