userver: userver/utils/algo.hpp File Reference
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algo.hpp File Reference

Detailed Description

Small useful algorithms.

Definition in file algo.hpp.

Go to the source code of this file.

#include <algorithm>
#include <cstddef>
#include <iterator>
#include <optional>
#include <string>
#include <string_view>
#include <type_traits>
#include <utility>
#include <userver/utils/checked_pointer.hpp>
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Namespaces

namespace  utils
 Utilities.
 

Functions

template<typename ResultString = std::string, typename... Strings>
ResultString utils::StrCat (const Strings &... strings)
 Concatenates multiple std::string_view-convertible items.
 
template<class Map , class Key >
autoutils::FindOrNullptr (Map &map, const Key &key)
 Returns nullptr if no key in associative container, otherwise returns pointer to value.
 
template<class Map , class Key , class Default >
Map::mapped_type utils::FindOrDefault (Map &map, const Key &key, Default &&def)
 Returns default value if no key in associative container, otherwise returns a copy of the stored value.
 
template<class Map , class Key >
Map::mapped_type utils::FindOrDefault (Map &map, const Key &key)
 Returns default value if no key in associative container, otherwise returns a copy of the stored value.
 
template<class Map , class Key >
std::optional< typename Map::mapped_type > utils::FindOptional (Map &map, const Key &key)
 Returns std::nullopt if no key in associative container, otherwise returns std::optional with a copy of value.
 
template<typename Map , typename Key >
auto utils::CheckedFind (Map &map, const Key &key) -> decltype(utils::MakeCheckedPtr(&map.find(key) ->second))
 Searches a map for an element and return a checked pointer to the found element.
 
template<class ToContainer , class FromContainer >
ToContainer utils::AsContainer (FromContainer &&container)
 Converts one container type to another.
 
template<class Container , class Pred >
auto utils::EraseIf (Container &container, Pred pred)
 Erased elements and returns number of deleted elements.
 
template<class Container , class T >
size_t utils::Erase (Container &container, const T &elem)
 Erased elements and returns number of deleted elements.
 
template<typename Container , typename Pred >
bool utils::ContainsIf (const Container &container, Pred pred)
 returns true if there is an element in container which satisfies the predicate