To write a UUID to an output stream using the canonical textual representation.Ĭreates a string with the canonical textual representation of a UUID. Although this operation does not make much logical sense, it is necessary in order to store UUIDs in a std::set. Namespace ID for name-based uuids when name string is an X.500 DN, in DER or a text output format (See, ).įor UUIDs comparison for equality/inequalityįor comparing whether one UUIDs is less than another.
Open source uuid generator iso#
Namespace ID for name-based uuids when mame string is an ISO OID (See, ). Namespace ID for name-based uuids when name string is a URL. Namespace ID for name-based uuids when name string is a fully-qualified domain name. Specialization of hash for uuid (necessary for storing UUIDs in unordered associative containers, such as std::unordered_set) It is available only if the UUID_TIME_GENERATOR macro is defined. Note:This is an experimental feature and should not be used in any production code.
It is available only if the UUID_SYSTEM_GENERATOR macro is defined.Īn experimental function object that generates time-based UUIDs. Note: This is not part of the standard proposal.
Open source uuid generator generator#
The following types and utilities are available:Ī class representing a UUID this can be default constructed (a nil UUID), constructed from a range (defined by a pair of iterators), or from a span.Ī strongly type enum representing the type of a UUIDĪ strongly type enum representing the version of a UUIDĪ function object that generates version 4 UUIDs using a pseudo-random number generator engine.Ī basic_uuid_random_generator using the Mersenne Twister engine ( basic_uuid_random_generator)Ī function object that generates version 5, name-based UUIDs using SHA1 hashing.Ī function object that generates new UUIDs using operating system resources ( CoCreateGuid on Windows, uuid_generate on Linux, CFUUIDCreate on Mac) A Universally Unique IDentifier (UUID) URN NamespaceĪlthough the specification puts the uuid library in the std namespace, this implementation uses the namespace uuids for this purpose, in order to make the library usable without violating the restrictions imposed on the std namespace.A UUID is a 128-bit number used to uniquely identify information in computer systems, such as database table keys, COM interfaces, classes and type libraries, and many others. A C++17 cross-platform single-header library implementation for universally unique identifiers, simply know as either UUID or GUID (mostly on Windows).
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