class ara::core::Map

use

The synchronous element access function at of class ara::core::Map ([SWS_CORE_01456]) serves for controlled retrieval of a value for an existing key. It is provided via header ara/core/map.h. As input parameter, it accepts a key reference const key_type &x and returns a modifiable reference mapped_type & to the associated value ([SWS_CORE_01456]). The semantics fundamentally correspond to the customary usage of std::map; for const instances, separate overload [SWS_CORE_01457] is available.

Error Handling and Boundary Conditions

In case of error, the function deliberately deviates from standard ISO behavior: if the specified element x is not present in the container, a IsoStdOutOfRangeViolation is triggered instead of a classic C++ exception of type std::out_of_range ([SWS_CORE_01456]). The signature is explicitly declared as noexcept and classified as exception safe (exception safe) ([SWS_CORE_01456]).

Interaction

The concept of indicating out-of-range errors via IsoStdOutOfRangeViolation is implemented uniformly module-wide:

• Within ara::core::Map, the read overload with const exhibits the same error behavior ([SWS_CORE_01457]).
• Corresponding at functions with IsoStdOutOfRangeViolation exist for ara::core::Array ([SWS_CORE_01273], [SWS_CORE_01274]), ara::core::Vector ([SWS_CORE_01354], [SWS_CORE_01355]), ara::core::StringView ([SWS_CORE_02133]), and ara::core::BasicString ([SWS_CORE_03063], [SWS_CORE_03064]).
• The triggered violation is presumably related to abort and termination mechanisms such as AddAbortHandler ([SWS_CORE_00054]) in the overall system. Question Q-9427d214713f7508 (open)

use

The member function at according to [SWS_CORE_01457] enables synchronous, read-only access to an element within an instance of ara::core::Map via header #include "ara/core/map.h". As a parameter, the searched key x is passed as const key_type &. Upon successful lookup, the method returns a const reference to the associated value (const mapped_type &).

Error Handling and Exception Behavior

The behavior basically corresponds to the standard behavior of std::map::at, but exhibits a specific deviation: if the key x is not found in the container, a IsoStdOutOfRangeViolation is thrown instead of std::out_of_range according to [SWS_CORE_01457]. Since the function is specified with noexcept, this violation does not lead to a regular C++ exception; presumably, this entails a controlled process termination via the error handling mechanisms as can be registered in the context of [SWS_CORE_00054]. Question Q-d7dd2c332f88ed14 (open)

Concurrency and Interaction

As a const method, the call qualifies for concurrent read access, provided that no concurrent modifying accesses to the same map instance take place. In addition to this const interface, a non-const overload exists with [SWS_CORE_01456], which returns a modifiable reference. The same strategy for signaling range violations using IsoStdOutOfRangeViolation is consistently implemented in other adaptive core containers as well, for example with ara::core::Array ([SWS_CORE_01274]) and ara::core::Vector ([SWS_CORE_01354]).

The member function clear of class ara::core::Map serves to completely clear the container content according to the specification in [SWS_CORE_01485]. The function requires including header file #include "ara/core/map.h". Call semantics and behavior follow the corresponding usage of the ISO C++ standard for associative standard maps ([map]).

Regarding interface and error handling, the function exhibits the following properties:

• Parameters and return value: The operation has the signature void clear () noexcept;, takes no parameters, and returns no value [SWS_CORE_01485].
• Exception safety: The function is explicitly declared as noexcept and specified as exception safe [SWS_CORE_01485]. It thus throws no C++ exceptions in the event of an error.
• Synchronous execution: The call is executed synchronously on the instance; after returning, the container is likely to be empty (size 0). Question Q-1d0cf2a1a33d818e (open)

In module core, clearing standard containers follows a uniform paradigm. Analogous clear functions with identical signature and exception safety are found, for example, for sequential containers in ara::core::Vector according to [SWS_CORE_01375] (ara/core/vector.h) and for strings in ara::core::BasicString according to [SWS_CORE_03057] (ara/core/string.h). Developers can rely across containers on the familiar standard C++ semantics and guaranteed freedom from exceptions.

The template method contains of class ara::core::Map serves to synchronously check whether a searched key exists in an associative container [SWS_CORE_01497]. It is provided via the header #include "ara/core/map.h" and is called as a constant member function (const) on an instance of ara::core::Map [SWS_CORE_01497]. As a call parameter, it accepts a constant reference const K &x to the key to be searched and returns a return value of type bool [SWS_CORE_01497].

Regarding its semantics, the specification refers to the corresponding usage in [map] [SWS_CORE_01497]. This is likely to be interpreted as adopting the behavior of std::map::contains, according to which the method returns true if and only if an equivalent key is contained in the map, and false otherwise. Question Q-664d5a3d099db549 (open)

Regarding robustness and error handling, the function is explicitly classified as not exception safe [SWS_CORE_01497]. Specific AUTOSAR error codes or notifications to DET or DEM do not exist for this operation. Callers must take into account that during execution, presumably triggered by key comparisons or conversions of type K, exceptions can be thrown and propagated outward. Question (open)

Since contains, as a reading const operation, does not modify the state of the map, concurrent read accesses to the same instance are generally uncritical, whereas parallel write modifications to the container are likely to require external synchronization. Question Q-f3ca0e3d094f8f0a (open)

Usage and Semantics

The member function contains belongs to the scope of class ara::core::Map and is provided via header file ara/core/map.h [SWS_CORE_01510]. The function has the signature bool contains (const key_type &x) const; and is executed synchronously. It serves to check whether an element with the key x is present in the container. The specification refers to the corresponding behavior in [map], which presumably means the semantics of the C++ standard container std::map::contains, which returns true if the key is present and false otherwise. Question Q-fea394bd408bf925 (open)

Error Handling and Exception Safety

The behavior of contains is explicitly classified in the specification as not exception safe [SWS_CORE_01510]. Specific error codes, error domains, and DET or DEM notifications are not defined in the scope of the specification. Callers must therefore take into account that no exception safety guarantees are granted during the search and that occurring exceptions must be handled.

Concurrency and Limitations

The specification makes no explicit statement regarding thread safety in [SWS_CORE_01510]. Because it is a const member function (const), the container state is not modified. Interpretation: Parallel read accesses are likely permissible, whereas concurrent write modifications to the same instance require external synchronization. Question Q-7d8ce1efc81ec781 (open)

Interaction in module core

In comparison to other state-checking functions of module core \u2014 such as HasValue [SWS_CORE_00751] or CheckError [SWS_CORE_00765] in ara::core::Result, which are defined as exception safe and noexcept \u2014 contains in ara::core::Map provides no noexcept guarantee and is declared as not exception-safe [SWS_CORE_01510].

The synchronous member function count of class ara::core::Map determines, based on the passed key x of type const key_type&, how often this key occurs in the container and returns the result as size_type [SWS_CORE_01494]. It is declared via header #include "ara/core/map.h" [SWS_CORE_01494]. Interpretation: Corresponding to the reference to the standard behavior in [map], the return value is likely to be either 0 or 1 in the case of unique keys. Question Q-a713cfc1019b40d0 (open)

Regarding error handling, the function is expressly classified as “not exception safe” according to the specification [SWS_CORE_01494]. No specific error codes or DET/DEM messages are defined; if the key comparison operation throws an exception, it is presumably propagated directly to the caller. Question (open)

Regarding concurrency and limitations, this is a const operation (const) [SWS_CORE_01494]. Interpretation: Concurrent read accesses to the same instance of ara::core::Map are likely to be possible without data races, whereas simultaneous modifying operations must be secured by external synchronization. Question (open)

In interplay with related requirements, a template overload template <class K> size_type count (const K &x) const within ara::core::Map exists with [SWS_CORE_01495]. This enables heterogeneous search queries with compatible comparison types K without having to mandatorily construct a temporary object of type key_type beforehand, but is subject to the same classification regarding exception safety [SWS_CORE_01495].

The template member function count of class ara::core::Map synchronously checks for the occurrence of elements based on a key and determines their count [SWS_CORE_01495]. The function is declared in header ara/core/map.h and returns the number of found elements as size_type [SWS_CORE_01495]. According to the specified reference to usage in [map], for unique keys the call returns the value 1 if a matching element exists, and 0 otherwise [SWS_CORE_01495].

In direct interaction with overload count(const key_type&) [SWS_CORE_01494], this variant allows passing any compatible key type const K& [SWS_CORE_01495]. Interpretation: The templating is likely designed for heterogeneous lookup operations in order to perform comparisons without prior conversion into a temporary key_type object [SWS_CORE_01495]. Question Q-e2572768e5600da7 (open) As a result, unnecessary allocations and conversion costs during search queries can be avoided.

Regarding exception safety, the method is declared as not exception safe (not exception safe) [SWS_CORE_01495], analogously to the related overload [SWS_CORE_01494]. Specific error channels such as DET or DEM do not exist for this container operation [SWS_CORE_01495]; any exceptions of the underlying comparison operator propagate to the caller. Because the method is const-qualified, it does not modify the container [SWS_CORE_01495]; concurrent read accesses are safe, but competing write accesses require external synchronization.

use

The member function crbegin of class ara::core::Map is provided via header file #include "ara/core/map.h" [SWS_CORE_01450]. It takes no parameters and synchronously returns a const_reverse_iterator to the first element of the reverse sequence [SWS_CORE_01450]. The functional semantics follow the specification statement “As per corresponding usage in [map]” [SWS_CORE_01450]; this presumably corresponds to the semantics of std::map::crbegin from the C++ standard. Question Q-0ad5de7dada37aa8 (open)

Error Handling and Exception Safety

Specific error codes, DET, or DEM messages are not provided for this call. According to the specification, the function is declared with noexcept and classified as exception safe (“exception safe”) [SWS_CORE_01450], so that no exceptions occur during execution.

Concurrency and Limitations

As a const-qualified method, crbegin does not modify the ara::core::Map object [SWS_CORE_01450]. The resulting iterator only permits read access to the elements contained in the container.

Interaction

The iteration concept is harmonized across containers in AUTOSAR Adaptive Core:

• ara::core::Vector [SWS_CORE_01342] and ara::core::BasicString [SWS_CORE_03049] provide functionally identical const noexcept methods.
• For ara::core::Array [SWS_CORE_01260], ara::core::Span [SWS_CORE_01978], and ara::core::StringView [SWS_CORE_02126], crbegin is additionally defined as constexpr.

use

The method crend of the template class ara::core::Map ([SWS_CORE_01451]) is available via header ara/core/map.h. It synchronously returns a constant reverse iterator (const_reverse_iterator) that, according to the standard behavior of std::map, marks the reaching of the end of a reverse iteration over the elements.

Error Handling and Exception Safety

The function has the specification noexcept and is classified as “exception safe” ([SWS_CORE_01451]). The call throws no exceptions and requires no checking of error codes.

Concurrency and Constraints

As a const-qualified method, crend does not modify the underlying map instance. Concurrent read accesses across multiple threads should therefore be safe as long as the instance is not concurrently modified by writing (interpretation). Question Q-5593deafcef41be3 (open)

Interaction

The signature and semantics fit into the uniform iterator interfaces of the ara::core library. Analogous crend functions exist for:

• ara::core::Vector ([SWS_CORE_01343]) and ara::core::BasicString ([SWS_CORE_03050]), each with an identical const noexcept declaration, as well as
• the containers and views ara::core::Array ([SWS_CORE_01261]), ara::core::Span ([SWS_CORE_01979]), and ara::core::StringView ([SWS_CORE_02127]), which are additionally declared as constexpr.

Usage of emplace in ara::core::Map

The template member function emplace of class ara::core::Map serves to directly construct and insert a new key-value pair into the associative container [SWS_CORE_01458]. The function is defined in header #include "ara/core/map.h" and receives constructor arguments via parameter pack Args&&... args [SWS_CORE_01458]. As a result, the synchronous call returns a std::pair<iterator, bool> [SWS_CORE_01458]. Interpretation: The reference to [map] likely means that the behavior follows the C++ standard container std::map, such that the iterator refers to the element and the boolean value indicates whether the entry was newly inserted. Question Q-fa496892c1e5e15d (open)

Regarding error handling and robustness, emplace is expressly classified in the specification as not exception safe [SWS_CORE_01458]. If memory allocation or object construction fails, the implementation does not guarantee container consistency. Specific AUTOSAR error codes or messages to DET or DEM are not provided for this fundamental interface.

In module core, analogous emplace operations exist for other data types, which however possess different guarantees: While ara::core::Vector::emplace is also specified as not exception safe [SWS_CORE_01366], the implementations in ara::core::Optional [SWS_CORE_01119] and ara::core::Variant [SWS_CORE_01661] offer conditional exception safety (conditionally exception safe).

use

The template member function emplace_hint of the container class ara::core::Map serves to insert a new element using a suggested position as a search hint ([SWS_CORE_01459]). It is provided via the header ara/core/map.h and accepts the iterator position as well as a parameter pack args for forwarding ([SWS_CORE_01459]). The functionality corresponds to the usage in [map] ([SWS_CORE_01459]). Presumably, the passed arguments are used directly for the in-place construction of the entry, whereby accelerated insertion should be achieved if appropriately positioned. Question Q-564dd9bab5c0293f (open)

Error Handling and Exception Safety

Regarding fault tolerance, the operation is explicitly classified as not exception safe ([SWS_CORE_01459]). If an error occurs during memory allocation or the construction of the key-value pair, no guarantees regarding the container state are likely to hold. Question (open) Specific error codes or diagnostic messages such as DET or DEM are not defined for this interface ([SWS_CORE_01459]).

Concurrency and Limitations

The specification makes no statement regarding concurrency and call contexts ([SWS_CORE_01459]). Interpretation: As a state-modifying operation on ara::core::Map, emplace_hint requires external synchronization upon concurrent access by multiple threads to prevent data inconsistencies. Question Q-04b3ab58544ceba4 (open)

use

The synchronous member function equal_range of class ara::core::Map is provided via header #include "ara/core/map.h" [SWS_CORE_01506]. It accepts a key x of type const key_type & and returns a pair of mutable iterators (std::pair<iterator, iterator>) that delimits the range of all matching entries [SWS_CORE_01506]. The behavior follows the usual semantics in [map] [SWS_CORE_01506]; since Map typically possesses unique keys, the resulting range is likely to comprise at most one element (interpretation). Question Q-d26df1f3ac3b6232 (open)

Error Handling and Exception Safety

The specification explicitly classifies the function as not exception safe [SWS_CORE_01506]. Specific error codes, return values for error signaling, or reports to DET or DEM are not defined. If the searched key is not found, both iterators of the pair are likely to be identical and point to the potential insertion position (interpretation according to [map]). Question (open)

Concurrency and Limitations

The operation is non-const and returns non-const iterators [SWS_CORE_01506]. Since no synchronization mechanisms are documented, concurrent read or write accesses to the same instance of ara::core::Map are presumably not thread-safe (interpretation) and require external synchronization. Question Q-3fb76368d9de336f (open)

Interaction

For read accesses to const instances, the overload with const_iterator pairs is available [SWS_CORE_01507]. In addition, template variants exist for heterogeneous lookup operations with an arbitrary key type K, both for non-const calls [SWS_CORE_01508] and for const calls [SWS_CORE_01509].

use

The member function equal_range of class ara::core::Map determines the range of all entries matching a specified key on a const instance [SWS_CORE_01507]. It takes the parameter const key_type &x and returns a std::pair<const_iterator, const_iterator> that represents the bounds of the range [SWS_CORE_01507]. The function is provided via the header file ara/core/map.h and executed synchronously [SWS_CORE_01507]. The semantics correspond to the specification of [map] [SWS_CORE_01507]; accordingly, for a map with unique keys, the returned range is likely to cover a span of at most one entry. Question Q-f2bdc3bf2c17948e (open)

Error Handling and Boundary Conditions

With regard to error and exception behavior, the method is specified as not exception safe (“not exception safe”) [SWS_CORE_01507]. No specific error codes, DET messages, or DEM events are defined. Because the method is declared as const, it does not modify the state of the calling object.

Interaction

The operation is embedded in a series of related overloads within ara::core::Map:

• For non-const instances, [SWS_CORE_01506] offers the same search, but returns modifiable iterators.
• Via the template functions [SWS_CORE_01508] and [SWS_CORE_01509], the search can also be performed with compatible keys of type K for mutable as well as const maps.

Usage and Semantics

The template member function equal_range of class ara::core::Map ([SWS_CORE_01508]) is provided via header ara/core/map.h. It serves to find the range of all elements whose key matches the passed value. The behavior follows the corresponding usage in [map] ([SWS_CORE_01508]). The synchronous call takes a key parameter x of generic type const K& and returns a std::pair<iterator, iterator> ([SWS_CORE_01508]) as return value. Interpretation: Through the generic parameter type K, the function is likely to support heterogeneous lookup, so that comparisons are possible without prior conversion to key_type. Question Q-19f39bf5b68f9a3c (open)

Error Handling and Boundary Conditions

According to the specification, the function is classified as not exception safe (not exception safe) ([SWS_CORE_01508]). Specific error codes, return values for error indication, or messages to DET or DEM are not provided. Because the function is not qualified as const, it returns modifiable iterators that permit write access to the contained values.

Interaction

The member function is part of a group of related equal_range overloads within ara::core::Map:

• [SWS_CORE_01506]: Non-const variant for direct keys of type const key_type&.
• [SWS_CORE_01507]: Const variant for direct keys of type const key_type&, which returns const_iterator.
• [SWS_CORE_01509]: Const template overload for generic keys of type const K&.

use

The template member function equal_range of class ara::core::Map from header ara/core/map.h determines the range of elements that match a passed search key x of type K [SWS_CORE_01509]. As a const method, it returns a value pair of const iterators std::pair<const_iterator, const_iterator> and does not modify the underlying container [SWS_CORE_01509]. According to the specification, the semantics follow the corresponding usage in [map] [SWS_CORE_01509]. Interpretation: The template parameter K is likely to allow a heterogeneous search for keys, so that no temporary object of the key type needs to be constructed. Question Q-7f7a93cef3cf7d8f (open)

Error Handling and Exception Safety

Regarding exception safety, the function is explicitly classified as not exception safe (“not exception safe”) [SWS_CORE_01509]. Specific error codes or feedback to diagnostic or error interfaces (such as DET or DEM) are not provided in the specification scope for this function [SWS_CORE_01509].

Interplay and overloads

The function is directly associated with the other variants of equal_range in ara::core::Map:

• The non-const template overload [SWS_CORE_01508], which returns a pair of modifiable iterators.
• The non-template overloads for const key_type &x in non-const form [SWS_CORE_01506] as well as in const form [SWS_CORE_01507].

The function erase of class ara::core::Map synchronously removes that element from the container that is referenced by the passed parameter position [SWS_CORE_01480]. The definition is included via header <ara/core/map.h> [SWS_CORE_01480]. As a return value, the function returns an iterator to the element of the map immediately following the removed element [SWS_CORE_01480]. The semantics follow the specification according to the corresponding usage in [map] [SWS_CORE_01480].

Regarding error handling, the operation is classified as not exception safe (not exception safe) [SWS_CORE_01480]. Specific error codes, fallback channels, or error notifications via DET or DEM are not specified for this call [SWS_CORE_01480]. Since the behavior is oriented towards [map], the passed iterator is likely to be invalidated by the erasing process, while iterators to remaining elements presumably remain intact [SWS_CORE_01480]. Passing an invalid or non-dereferenceable iterator presumably leads to undefined behavior due to lack of validation (Interpretation). Question Q-1a4a3eae317fc52e (open)

In interaction within ara::core::Map, alternative overloads exist: In addition to erasure via a mutable iterator, an overload for const_iterator is available [SWS_CORE_01481]. Likewise, elements can be removed key-based via key_type [SWS_CORE_01482] or as an entire iterator range [SWS_CORE_01483].

The member function erase of class ara::core::Map serves for synchronous erasure of a single element at the position specified by iterator position [SWS_CORE_01481]. Declaration is done via header file ara/core/map.h [SWS_CORE_01481]. The behavior corresponds to the definition in [map], with the function returning a iterator to the succeeding element of the map [SWS_CORE_01481].

Regarding exception handling, the function is specified as “not exception safe” [SWS_CORE_01481]. Specific error codes, violations, or error messages are not defined for this operation [SWS_CORE_01481]. Interpretation: Passing an invalid or non-dereferenceable iterator as position should lead to undefined behavior, as the specification does not provide for error checks. Question Q-9a3242ae4773cc0b (open)

In interaction with the container interface of ara::core::Map, further overloads are available:

• Erasure via a mutable iterator iterator position [SWS_CORE_01480],
• Erasure by key via erase(const key_type &x) returning the number of removed elements [SWS_CORE_01482],
• Range erasure via two iterators first and last [SWS_CORE_01483].

Corresponding overloads for single const_iterator positions are analogously defined for other containers such as ara::core::Vector [SWS_CORE_01372] or ara::core::BasicString [SWS_CORE_03103].

use

The synchronous member function erase of class ara::core::Map serves to remove entries via a specified key x of type const key_type& ([SWS_CORE_01482]). The interface is included via header ara/core/map.h. The functional behavior is defined as equivalent to usage in [map] ([SWS_CORE_01482]). Interpretation: According to this C++ standard reference, the return value of type size_type should indicate the number of elements successfully erased from the container. Question Q-03637eb7e5efe502 (open)

Error Handling and Boundary Conditions

In the specification, the function is classified as not exception safe ([SWS_CORE_01482]). Specific return codes for error situations or reporting paths via DET or DEM are not defined for this container call. Interpretation: Due to the lack of exception safety, no guarantees regarding the state of the container should apply in the event of an error, which is why the caller should ensure consistent data and valid call parameters before execution. Question (open)

Interaction

The method forms the key-based counterpart to the iterator-based erase operations of ara::core::Map, which clean up individual positions ([SWS_CORE_01480], [SWS_CORE_01481]) or closed iterator ranges ([SWS_CORE_01483]). The pattern of standardized erase functions is found across containers in ara::core, such as for ara::core::Vector ([SWS_CORE_01372]) or for ara::core::BasicString ([SWS_CORE_03102]).

use

The member function erase of container ara::core::Map serves to remove a range of values delimited by two iterators [SWS_CORE_01483]. It is defined in header #include "ara/core/map.h" and has signature iterator erase (const_iterator first, const_iterator last); [SWS_CORE_01483]. Functionally, the behavior follows standard semantics in [map] [SWS_CORE_01483]. As a return value, it provides an iterator to the element immediately following the removed range, or the end of the container [SWS_CORE_01483].

Error Handling and Restrictions

The operation is explicitly classified in the specification as not exception safe [SWS_CORE_01483]. Specific AUTOSAR error codes or messages to DET or DEM are not defined for this function. The caller will therefore likely need to ensure on their own responsibility that first and last reference a valid, well-formed range within the same instance, as no separate checks are provided (interpretation). Question Q-69e88ecc6f04bb64 (open)

Interaction

Within ara::core::Map, this range erase complements the overloads for removing single elements using iterator [SWS_CORE_01480], using const_iterator [SWS_CORE_01481], and by key key_type [SWS_CORE_01482]. Similar erase interfaces for iterator ranges can also be found in other containers of the Adaptive Core Library, namely in ara::core::Vector [SWS_CORE_01373] and ara::core::BasicString [SWS_CORE_03104].

The member function extract of class ara::core::Map extracts the element at the position designated by iterator position and returns a node of type node_type [SWS_CORE_01470]. The declaration and semantics follow the corresponding usage in [map], whereby the node is extracted directly from the associative container. The function is provided via header ara/core/map.h.

Usage and Behavior

The call takes place synchronously on an instance of ara::core::Map. Passed as parameter is a const_iterator position, which, interpretation: must refer to a valid, dereferenceable element within the called map. Due to the extraction, the element is removed from the container, while the returned node_type object assumes ownership of the node.

Error Handling and Exception Safety

Regarding exception handling, the function is explicitly classified as not exception safe according to the specification [SWS_CORE_01470]. If an exception occurs during execution, the operation guarantees no deterministic container guarantees, which is why calling code should provide appropriate safeguards.

Interaction and Alternatives

As an overload, alongside position-based extraction, the key-based variant extract(const key_type &x) is also available [SWS_CORE_01471]. The latter allows extracting an entry directly based on its key value, without having to determine an iterator manually beforehand.

use

The synchronous member function extract is defined in header file #include "ara/core/map.h" within class ara::core::Map [SWS_CORE_01471]. It accepts a constant key reference const key_type &x as a parameter and returns the found element as node_type [SWS_CORE_01471]. The functional semantics refer to the corresponding usage in [map] [SWS_CORE_01471]; this likely corresponds to the C++ standard according to which the node is extracted directly from the container without having to copy key or value. Question (open)

Error Handling and Restrictions

The function is explicitly classified as \u201cnot exception safe\u201d in the specification [SWS_CORE_01471]. Specific error codes, error classes, or DET or DEM notifications are not defined in the payload. In the event of an error, there are therefore likely no guarantees regarding the preservation or consistency of the container state, which is why calling code should provide appropriate protective measures. Question (open)

Interaction

The specification element directly relates to the overload node_type extract(const_iterator position) [SWS_CORE_01470]. While the present function identifies and extracts an element via the search key [SWS_CORE_01471], the related variant enables targeted extraction via an already known iterator position [SWS_CORE_01470]. Both interfaces belong to the scope of ara::core::Map and share the same property of lacking exception safety [SWS_CORE_01470] [SWS_CORE_01471].

use

The member function find of class ara::core::Map is used to find an element synchronously using its key [SWS_CORE_01490]. The function is declared in header file ara/core/map.h. It takes a reference to the sought key (const key_type &x) and returns a mutable iterator to the found key-value pair; if no matching entry is found, the return corresponds to the end iterator of the map [SWS_CORE_01490].

Error Handling and Exception Safety

According to the specification, this function is classified as not exception safe [SWS_CORE_01490]. Error notifications via DET or DEM are not specified for this basic container service. If operational errors occur during comparison, exceptions of the underlying comparison operator can be propagated.

Concurrency and Interaction

Since this is a non-const member function that returns a writable iterator, concurrent access without synchronization is presumably not thread-safe. Question Q-0f9f56b506cfd318 (open) For purely read access to const instances of ara::core::Map, the overload with const_iterator is available [SWS_CORE_01491]. In addition, templated overloads support transparent lookup with compatible comparison types K, both modifying [SWS_CORE_01492] and const [SWS_CORE_01493]. In contrast to the character-based find functions in ara::core::StringView [SWS_CORE_02157] or ara::core::BasicString [SWS_CORE_03315], which return indices of type size_type and are partly noexcept, this function operates container-based via iterators.

The const member function find of class ara::core::Map serves to synchronously find an entry by its key [SWS_CORE_01491]. Header #include "ara/core/map.h" must be included for the call. The function expects a reference to the searched key const key_type &x as a parameter. The behavior corresponds to the specification of [map] in the C++ standard, so that upon a successful search a const_iterator to the element is returned, and otherwise end() is presumably returned [SWS_CORE_01491]. Question Q-dca69a1ec5423a8b (open)

Regarding error handling, the function is declared as not exception safe [SWS_CORE_01491]. Since the search operation is based on comparing keys, exceptions that occur are likely to result primarily from the user-defined comparison operation. No DET or DEM error messages are defined for this elementary container. Since this is a read-only operation on a const instance, concurrent access by multiple threads to the same object can be parallelized according to standard C++ container semantics, as long as no simultaneous modifications take place (interpretation). Question Q-a8ec748711885418 (open)

In interplay with other interfaces, the method complements the non-const variant [SWS_CORE_01490], which returns a modifiable iterator. For heterogeneous search operations without type conversion, template overloads for modifiable [SWS_CORE_01492] as well as constant instances [SWS_CORE_01493] are also available in ara::core::Map. Search functions of the same name also exist in the Core module for string classes such as ara::core::BasicString [SWS_CORE_03407] and ara::core::StringView [SWS_CORE_02157].

The template member function find according to [SWS_CORE_01492] serves to synchronously find an element within an instance of ara::core::Map via header file ara/core/map.h. It accepts a reference parameter const K &x and returns a mutable iterator to the found key-value pair or the container's end iterator. The specification refers to the behavior of [map]; the generic parameter form is likely to be interpreted here as a heterogeneous key search in order to compare search keys of differing types without prior conversion. Question Q-425357890b9ea3fe (open)

Regarding error handling and exception safety, the function is explicitly classified as not exception safe ([SWS_CORE_01492]). Specific error codes, return values for error states, or DET/DEM messages are not defined in the payload. If an exception occurs during comparison or internal traversal, the call offers no exception guarantee.

In the interplay within ara::core::Map, the function forms the non-const counterpart to the const heterogeneous search [SWS_CORE_01493] as well as to the non-generic overloads [SWS_CORE_01490] and [SWS_CORE_01491], each of which is tied firmly to const key_type &x. It differs fundamentally from the identically named search functions of other containers, such as ara::core::StringView ([SWS_CORE_02157]) or ara::core::BasicString ([SWS_CORE_03315]), which perform string-based position searches and are partially declared as noexcept.

use

The template member function find in namespace ara::core::Map serves for the read-only search for elements by a key x of type K [SWS_CORE_01493]. The function is defined in header #include "ara/core/map.h" and is called synchronously on a const instance [SWS_CORE_01493]. It returns a const_iterator to the found element; interpretation: In the case of a non-existent key, the returned iterator is likely to correspond to the end iterator of the map, since according to the specification the semantics follow the behavior of [map] [SWS_CORE_01493]. Question Q-3fa354022f0bca9b (open)

Error Handling and Boundary Conditions

Regarding fault tolerance, the function is explicitly classified as not exception safe [SWS_CORE_01493]. Specific error codes, return values for error indication, or messages to DET or DEM are not defined in the specification. Callers must note that if exceptions occur during the search or comparison process, no exception safety guarantees are provided [SWS_CORE_01493].

Interaction

Within ara::core::Map, this overload completes the search operations:

• It complements the non-const template variant iterator find(const K &x) [SWS_CORE_01492].
• It forms the generic counterpart to the overloads with fixed const key_type &x, which are declared as non-const [SWS_CORE_01490] and const [SWS_CORE_01491].

It thus differs from the operations of the same name in ara::core::StringView (e.g. [SWS_CORE_02157]) and ara::core::BasicString (e.g. [SWS_CORE_03315]), which operate on strings, return positions of type size_type, and are declared as exception safe.

use

The function insert in the context of ara::core::Map serves to synchronously add a value element by copy via the parameter const value_type &x ([SWS_CORE_01460]). The operation is included via the header file ara/core/map.h. The return type std::pair<iterator, bool> follows the specification “As per corresponding usage in [map]”: Interpretation: Here, the iterator likely refers to the newly inserted or already existing element, while the boolean flag indicates successful new insertion. Question Q-b059c1d0f4dd6665 (open)

Error handling

No specific AUTOSAR error codes such as DET or DEM messages are provided in the specification. The function is explicitly declared as not exception safe (“not exception safe”) ([SWS_CORE_01460]). If an internal memory allocation or copying of the element fails, the container provides no exception or rollback guarantees; such an error would presumably lead to termination or an undefined state. Question Q-cbe74b301167bcc4 (open)

Concurrency and Limitations

The call occurs synchronously in the thread of the caller. The container operations do not have integrated synchronization, which is why the function is not reentrant with respect to the same instance. Concurrent read or write accesses must be protected by the caller.

Interaction

Complementary overloads of insert exist for ara::core::Map:

• Move-based variants for temporary values ([SWS_CORE_01461], [SWS_CORE_01462]),
• Position-based insert operations with iterator hint ([SWS_CORE_01463], [SWS_CORE_01464]),
• Range and initializer lists ([SWS_CORE_01466], [SWS_CORE_01467]) as well as node-handle transfers ([SWS_CORE_01468], [SWS_CORE_01469]).

Analogous insert operations are found with adapted signatures in other Core classes such as ara::core::Vector ([SWS_CORE_01367]) and ara::core::BasicString ([SWS_CORE_03093]).

The member function insert of ara::core::Map synchronously inserts an element into the associative container via move semantics using an rvalue reference (value_type &&x) ([SWS_CORE_01461]). Declaration is provided via header file #include "ara/core/map.h" ([SWS_CORE_01461]). According to the specification, functional behavior complies with the corresponding usage in [map] of the C++ standard ([SWS_CORE_01461]). The function returns a std::pair<iterator, bool>; interpretation: here, the boolean value is likely to indicate whether the element was newly inserted, while the iterator points to the element in the container ([SWS_CORE_01461]). Question Q-e1901e26d8be3470 (open)

Regarding error handling and exception safety, the function is explicitly classified in the specification as not exception safe ([SWS_CORE_01461]). Specific error codes or AUTOSAR error messages like DET or DEM are not specified for this call.

In the interaction within ara::core::Map, this overload represents the rvalue-based counterpart to the copy variant insert(const value_type &) ([SWS_CORE_01460]) and the generic template version insert(P &&) ([SWS_CORE_01462]). For insertions with a position hint, overloads with a hint iterator such as insert(const_iterator, value_type &&) ([SWS_CORE_01464]) and for node handles via insert(node_type &&) ([SWS_CORE_01468]) using insert_return_type ([SWS_CORE_01418]) are also available.

Template member function insert of class ara::core::Map serves to synchronously insert a compatible key-value pair via a forwarding reference P&& x into the associative container instance [SWS_CORE_01462]. It is included via header #include "ara/core/map.h" and references the semantics of [map] [SWS_CORE_01462] for its behavior. As return value, it delivers a std::pair<iterator, bool> [SWS_CORE_01462]. Interpretation: The boolean return value is expected to signal whether a new entry was created, while the iterator points to the newly inserted or already existing element. Question Q-64d2947d60792374 (open)

Regarding error handling, the function is expressly categorized in the specification as not exception safe (not exception safe) [SWS_CORE_01462]. Specific error codes, error messages, or interfaces to diagnostic and error memories such as DET or DEM are not specified for this call.

Regarding concurrency and constraints, the call modifies the state of the map; therefore, concurrent access to the same instance is presumably not reentrant and requires external protection against data races. Question (open) Execution takes place synchronously in the context of the calling thread.

In interplay within ara::core::Map, this generic function complements the direct overloads for const value_type& [SWS_CORE_01460] and value_type&& [SWS_CORE_01461]. In addition, position-based insert operations with iterator hint [SWS_CORE_01465], range operations [SWS_CORE_01466], and the insertion of node handles via insert_return_type [SWS_CORE_01418] [SWS_CORE_01468] exist.