utils::AnyStorage< StorageTag > Class Template Reference

Table of Contents

• Public Member Functions
• Detailed Description
• Usage example
• Constructor & Destructor Documentation
• AnyStorage()
• ~AnyStorage()
• Member Function Documentation
• Emplace()
• Get() [1/2]
• Get() [2/2]
• GetOptional() [1/2]
• GetOptional() [2/2]
• Set()

map-like heterogeneous data storage More...

#include <userver/utils/any_storage.hpp>

Public Member Functions
template<typename Data >
const Data &	Get (const AnyStorageDataTag< StorageTag, Data > &tag) const
template<typename Data >
Data &	Get (const AnyStorageDataTag< StorageTag, Data > &tag)
template<typename Data >
Data &	Set (AnyStorageDataTag< StorageTag, Data > tag, Data data)
	Stores the data.
template<typename Data , typename... Args>
Data &	Emplace (const AnyStorageDataTag< StorageTag, Data > &tag, Args &&... args)
	Emplaces the data. The data is rewritten if already stored.
template<typename Data >
Data *	GetOptional (const AnyStorageDataTag< StorageTag, Data > &tag) noexcept
template<typename Data >
const Data *	GetOptional (const AnyStorageDataTag< StorageTag, Data > &tag) const noexcept
template<typename Data >
void	Erase (const AnyStorageDataTag< StorageTag, Data > &tag)
	Erase data.

Detailed Description

template<typename StorageTag>
class utils::AnyStorage< StorageTag >

map-like heterogeneous data storage

Usage example

struct MyStorage {};
 
const utils::AnyStorageDataTag<MyStorage, char> kChar;
const utils::AnyStorageDataTag<MyStorage, int> kInt;
const utils::AnyStorageDataTag<MyStorage, std::string> kStr;
const utils::AnyStorageDataTag<MyStorage, std::string> kStr2;
 
TEST(AnyStorage, Simple) {
  utils::AnyStorage<MyStorage> storage;
 
  EXPECT_EQ(storage.GetOptional(kInt), nullptr);
 
  storage.Emplace(kInt, 1);
  storage.Emplace(kStr, std::string{"1"});
 
  EXPECT_EQ(*storage.GetOptional(kInt), 1);
 
  EXPECT_EQ(storage.Get(kInt), 1);
  EXPECT_EQ(storage.Get(kStr), "1");
 
  storage.Set(kInt, 2);
  storage.Set(kStr, std::string{"2"});
 
  EXPECT_EQ(storage.Get(kInt), 2);
  EXPECT_EQ(storage.Get(kStr), "2");
 
  storage.Emplace(kStr, std::string{"3"});
  storage.Emplace(kStr, std::string{"4"});
  EXPECT_EQ(storage.Get(kStr), "4");
}

Definition at line 79 of file any_storage.hpp.

Constructor & Destructor Documentation

AnyStorage()

template<typename StorageTag >

utils::AnyStorage< StorageTag >::AnyStorage

(

)

Definition at line 130 of file any_storage.hpp.

~AnyStorage()

template<typename StorageTag >

utils::AnyStorage< StorageTag >::~AnyStorage

(

)

Definition at line 144 of file any_storage.hpp.

Member Function Documentation

Emplace()

template<typename StorageTag >

template<typename Data , typename... Args>

Data & utils::AnyStorage< StorageTag >::Emplace	(	const AnyStorageDataTag< StorageTag, Data > &	tag,
		Args &&...	args
	)

Emplaces the data. The data is rewritten if already stored.

Definition at line 165 of file any_storage.hpp.

Get() [1/2]

template<typename StorageTag >

template<typename Data >

Data & utils::AnyStorage< StorageTag >::Get

(

const AnyStorageDataTag< StorageTag, Data > &

tag

)

Returns

Stored data.

Exceptions

std::runtime_error

if no data was stored

Definition at line 179 of file any_storage.hpp.

Get() [2/2]

template<typename StorageTag >

template<typename Data >

const Data & utils::AnyStorage< StorageTag >::Get

(

const AnyStorageDataTag< StorageTag, Data > &

tag

)

const

Returns

Stored data.

Definition at line 188 of file any_storage.hpp.

GetOptional() [1/2]

template<typename StorageTag >

template<typename Data >

const Data * utils::AnyStorage< StorageTag >::GetOptional ( const AnyStorageDataTag< StorageTag, Data > &  tag ) const

noexcept

Returns

Pointer to stored data or nullptr if no data found.

Definition at line 206 of file any_storage.hpp.

GetOptional() [2/2]

template<typename StorageTag >

template<typename Data >

Data * utils::AnyStorage< StorageTag >::GetOptional ( const AnyStorageDataTag< StorageTag, Data > &  tag )

noexcept

Returns

Pointer to stored data or nullptr if no data is found.

Definition at line 196 of file any_storage.hpp.

Set()

template<typename StorageTag >

template<typename Data >

Data & utils::AnyStorage< StorageTag >::Set	(	AnyStorageDataTag< StorageTag, Data >	tag,
		Data	data
	)

Stores the data.

Definition at line 154 of file any_storage.hpp.

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

• userver/utils/any_storage.hpp