utils::AnyStorage< StorageTag > Class Template Reference

#include <userver/utils/any_storage.hpp>

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;
 
struct BoolStorage {};
 
const utils::AnyStorageDataTag<BoolStorage, bool> kBool;
 
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.

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.

Constructor & Destructor Documentation

AnyStorage()

template<typename StorageTag >

utils::AnyStorage< StorageTag >::AnyStorage

(

)

Definition at line 137 of file any_storage.hpp.

~AnyStorage()

template<typename StorageTag >

utils::AnyStorage< StorageTag >::~AnyStorage

(

)

Definition at line 149 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 169 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 182 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 190 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 197 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 159 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