folly::detail::Lazy< Func > Struct Template Reference

#include <Lazy.h>

Public Types
typedef invoke_result_t< Func >	result_type

Public Member Functions
	Lazy (Func &&f)
	Lazy (const Func &f)
	Lazy (Lazy &&o)
	Lazy (const Lazy &)=delete
Lazy &	operator= (const Lazy &)=delete
Lazy &	operator= (Lazy &&)=delete
const result_type &	operator() () const
result_type &	operator() ()

Private Member Functions
void	ensure_initialized () const

Private Attributes
Optional< result_type >	value_
Func	func_

Detailed Description

template<class Func>
struct folly::detail::Lazy< Func >

Definition at line 91 of file Lazy.h.

Member Typedef Documentation

template<class Func >

typedef invoke_result_t<Func> folly::detail::Lazy< Func >::result_type

Definition at line 92 of file Lazy.h.

Constructor & Destructor Documentation

template<class Func >

folly::detail::Lazy< Func >::Lazy ( Func &&  f )

inlineexplicit

Definition at line 101 of file Lazy.h.

Referenced by folly::detail::Lazy< Func >::Lazy().

: func_(std::move(f)) {}

template<class Func >

folly::detail::Lazy< Func >::Lazy ( const Func &  f )

inlineexplicit

Definition at line 102 of file Lazy.h.

: func_(f) {}

template<class Func >

folly::detail::Lazy< Func >::Lazy ( Lazy< Func > &&  o )

inline

Definition at line 104 of file Lazy.h.

References folly::detail::Lazy< Func >::Lazy(), and folly::detail::Lazy< Func >::operator=().

: value_(std::move(o.value_)), func_(std::move(o.func_)) {}

template<class Func >

folly::detail::Lazy< Func >::Lazy ( const Lazy< Func > &  )

delete

Member Function Documentation

template<class Func >

void folly::detail::Lazy< Func >::ensure_initialized ( ) const

inlineprivate

Definition at line 123 of file Lazy.h.

References folly::detail::Lazy< Func >::func_, and folly::detail::Lazy< Func >::value_.

Referenced by folly::detail::Lazy< Func >::operator()().

                                  {
    if (!value_) {
      value_ = func_();
    }
  }

template<class Func >

const result_type& folly::detail::Lazy< Func >::operator() ( ) const

inline

Definition at line 110 of file Lazy.h.

References folly::detail::Lazy< Func >::ensure_initialized(), and folly::detail::Lazy< Func >::value_.

                                        {
    ensure_initialized();

    return *value_;
  }

template<class Func >

result_type& folly::detail::Lazy< Func >::operator() ( )

inline

Definition at line 116 of file Lazy.h.

References folly::detail::Lazy< Func >::ensure_initialized(), and folly::detail::Lazy< Func >::value_.

                            {
    ensure_initialized();

    return *value_;
  }

template<class Func >

Lazy& folly::detail::Lazy< Func >::operator= ( const Lazy< Func > &  )

delete

Referenced by folly::detail::Lazy< Func >::Lazy().

template<class Func >

Lazy& folly::detail::Lazy< Func >::operator= ( Lazy< Func > &&  )

delete

Member Data Documentation

template<class Func >

Func folly::detail::Lazy< Func >::func_

mutableprivate

Definition at line 130 of file Lazy.h.

Referenced by folly::detail::Lazy< Func >::ensure_initialized().

template<class Func >

Optional<result_type> folly::detail::Lazy< Func >::value_

mutableprivate

Definition at line 129 of file Lazy.h.

Referenced by folly::detail::Lazy< Func >::ensure_initialized(), and folly::detail::Lazy< Func >::operator()().

---

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

• proxygen/folly/folly/Lazy.h