cds::opt::value< Option > Struct Template Reference

Metafunction to select option value. More...

#include <cds/opt/options.h>

Inheritance diagram for cds::opt::value< Option >:

Detailed Description

template<typename Option>
struct cds::opt::value< Option >

Metafunction to select option value.

This metafunction is intended for extracting the value of the Option option. For example,

#include <cds/opt/options.h>
#include <type_traits> // only for testing purpose (static_assert)

struct tag_a;

// Define option
typedef cds::opt::tag< tag_a >  tag_option;

// What is the value of the tag_option?
// How we can extract tag_a from tag_option?
// Here is a solution:
typedef cds::opt::value< tag_option >::tag  tag_option_value;

// tag_option_value is the same as tag_a
static_assert( std::is_same< tag_option_value, tag_a >::value, "Error: tag_option_value != tag_a" );

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The documentation for this struct was generated from the following file:

• cds/opt/options.h