cds::opt::find_option< What, Options > Struct Template Reference

Metafunction to find What option in Options list. More...

#include <cds/opt/options.h>

Public Types
typedef details::find_option< What, Options... >::type	type
	Metafunction result.

Detailed Description

template<typename What, typename... Options>
struct cds::opt::find_option< What, Options >

Metafunction to find What option in Options list.

If Options contains What< Val > option for any Val then the result is What< Val > Otherwise the result is What.

Example:

#include <cds/opt/options.h>
namespace co = cds::opt;

struct default_tag;
struct tag_a;
struct tag_b;

// Find option co::tag.

// res1 is co::tag< tag_a >
typedef co::find_option< co::tag< default_tag >, co::gc< cds::gc::HP >, co::tag< tag_a > >::type res1;

// res2 is default co::tag< default_tag >
typedef co::find_option< co::tag< default_tag >, co::less< x >, co::hash< H > >::type res2;

// Multiple option co::tag. The first option is selected
// res3 is default co::tag< tag_a >
typedef co::find_option< co::tag< default_tag >, co::tag< tag_a >, co::tag< tag_b > >::type res3;

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

• cds/opt/options.h