folly::gen::detail::Contains< Needle > Class Template Reference

#include <Base-inl.h>

Inheritance diagram for folly::gen::detail::Contains< Needle >:

Public Member Functions
	Contains (Needle needle)
template<class Source , class Value , class StorageType = typename std::decay<Value>::type>
bool	compose (const GenImpl< Value, Source > &source) const
Public Member Functions inherited from folly::gen::Operator< Contains< Needle > >
ResultGen	compose (const GenImpl< Value, Source > &source) const
Public Member Functions inherited from folly::gen::FBounded< Self >
const Self &	self () const
Self &	self ()

Private Attributes
Needle	needle_

Additional Inherited Members
Protected Member Functions inherited from folly::gen::Operator< Contains< Needle > >
	Operator ()=default
	Operator (Operator &&) noexcept=default
	Operator (const Operator &)=default
Operator &	operator= (Operator &&) noexcept=default
Operator &	operator= (const Operator &)=default

Detailed Description

template<class Needle>
class folly::gen::detail::Contains< Needle >

Contains - For testing whether a value matching the given value is contained in a sequence.

This type should be used through the 'contains' helper method, like:

bool contained = seq(1, 10) | map(square) | contains(49);

Definition at line 2179 of file Base-inl.h.

Constructor & Destructor Documentation

template<class Needle >

folly::gen::detail::Contains< Needle >::Contains ( Needle  needle )

inlineexplicit

Definition at line 2183 of file Base-inl.h.

References type, and testing::Value().

: needle_(std::move(needle)) {}

Member Function Documentation

template<class Needle >

template<class Source , class Value , class StorageType = typename std::decay<Value>::type>

bool folly::gen::detail::Contains< Needle >::compose ( const GenImpl< Value, Source > &  source ) const

inline

Definition at line 2189 of file Base-inl.h.

References value.

                                                           {
    static_assert(
        !Source::infinite,
        "Calling contains on an infinite source might cause "
        "an infinite loop.");
    return !(source | [this](Value value) {
      return !(needle_ == std::forward<Value>(value));
    });
  }

Member Data Documentation

template<class Needle >

Needle folly::gen::detail::Contains< Needle >::needle_

private

Definition at line 2180 of file Base-inl.h.

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

• proxygen/folly/folly/gen/Base-inl.h