folly::gen::detail::GroupBy< Selector > Class Template Reference

#include <Base-inl.h>

Inheritance diagram for folly::gen::detail::GroupBy< Selector >:

Classes
class	Generator

Public Member Functions
	GroupBy ()
	GroupBy (Selector selector)
template<class Source , class Value , class Gen = Generator<Value, Source>>
Gen	compose (GenImpl< Value, Source > &&source) const
template<class Source , class Value , class Gen = Generator<Value, Source>>
Gen	compose (const GenImpl< Value, Source > &source) const
Public Member Functions inherited from folly::gen::Operator< GroupBy< Selector > >
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
Selector	selector_

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

Detailed Description

template<class Selector>
class folly::gen::detail::GroupBy< Selector >

GroupBy - Group values by a given key selector, producing a sequence of groups.

This type is usually used through the 'groupBy' helper function, like:

auto bests = from(places) | groupBy([](const Place& p) { return p.city; }) | [](Group<std::string, Place>&& g) { cout << g.key() << ": " << (g | first).description; };

Definition at line 1145 of file Base-inl.h.

Constructor & Destructor Documentation

template<class Selector >

folly::gen::detail::GroupBy< Selector >::GroupBy ( )

inline

Definition at line 1149 of file Base-inl.h.

{}

template<class Selector >

folly::gen::detail::GroupBy< Selector >::GroupBy ( Selector  selector )

inlineexplicit

Definition at line 1151 of file Base-inl.h.

References testing::Key(), type, and testing::Value().

: selector_(std::move(selector)) {}

Member Function Documentation

template<class Selector >

template<class Source , class Value , class Gen = Generator<Value, Source>>

Gen folly::gen::detail::GroupBy< Selector >::compose ( GenImpl< Value, Source > &&  source ) const

inline

Definition at line 1196 of file Base-inl.h.

References folly::gen::move.

                                                     {
    return Gen(std::move(source.self()), selector_);
  }

template<class Selector >

template<class Source , class Value , class Gen = Generator<Value, Source>>

Gen folly::gen::detail::GroupBy< Selector >::compose ( const GenImpl< Value, Source > &  source ) const

inline

Definition at line 1201 of file Base-inl.h.

References folly::gen::FBounded< Self >::self().

                                                          {
    return Gen(source.self(), selector_);
  }

Member Data Documentation

template<class Selector >

Selector folly::gen::detail::GroupBy< Selector >::selector_

private

Definition at line 1146 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