Overview

ISO/IEC TR 19768:2007 - "Information technology - Programming languages - Technical Report on C++ Library Extensions" documents a set of proposed extensions to the C++ standard library (ISO/IEC 14882). The report catalogues additional library components, header-level additions, class templates and requirements intended to reflect widespread practice and to identify candidates for future standardization. It also addresses interoperability with the C programming language (ISO/IEC 9899) where relevant.

Key topics and technical requirements

The report organizes extensions into focused areas and specifies header names, class templates, semantics and implementation requirements. Major technical topics include:

General utilities
- Reference wrappers and helper utilities (e.g., reference_wrapper)
- Smart pointer concepts (shared_ptr, weak_ptr, enable_shared_from_this) and their ownership/observer semantics
Functional programming and function objects
- Polymorphic function wrappers, bind/mem_fn helpers, placeholders, and function-related helper types
Metaprogramming and type traits
- Compile-time type queries and transformations defined in a proposed header (type categories, relationships, const/volatile/reference/array/pointer transformations)
Numerical facilities
- Random number generation framework (engines, distributions, random_device)
- Additional mathematical special functions listed for support
Containers
- Tuple and pair types, fixed-size array (), and unordered associative containers (unordered_set, unordered_map, unordered_multiset, unordered_multimap) including hash function requirements and exception-safety guarantees
Regular expressions
- A header, regex_traits, regex_error and matching APIs with options and match flags
C interoperability
- Facilities improving interaction with ISO/IEC 9899 (C) for better cross-language compatibility

The TR prescribes namespaces and headers, functional semantics, algorithms, exception-safety, and observable behavior required for implementers.

Applications and who uses it

ISO/IEC TR 19768:2007 is primarily useful to:

Library and compiler implementers - as guidance for adding standardized extensions to the C++ library
Tool and framework authors - who need standardized smart pointers, hashing, tuples, arrays, regex and RNG facilities
Developers in domains requiring numerical and statistical tools - who benefit from uniform random engines and specialized math functions
Teams working on C/C++ interoperability - to improve safe integration with C code

Adopting these extensions promotes portability, reduces ad‑hoc implementations, and speeds development of higher-level C++ applications.

Related standards

ISO/IEC 14882 - The C++ programming language standard
ISO/IEC 9899 - The C programming language standard

Keywords: ISO/IEC TR 19768:2007, C++ library extensions, C++ standard library, shared_ptr, type_traits, random number generation, unordered_map, regex, reference-counted pointers, metaprogramming.

Overview

Key topics and technical requirements

The report organizes extensions into focused areas and specifies header names, class templates, semantics and implementation requirements. Major technical topics include:

General utilities
- Reference wrappers and helper utilities (e.g., reference_wrapper)
- Smart pointer concepts (shared_ptr, weak_ptr, enable_shared_from_this) and their ownership/observer semantics
Functional programming and function objects
- Polymorphic function wrappers, bind/mem_fn helpers, placeholders, and function-related helper types
Metaprogramming and type traits
- Compile-time type queries and transformations defined in a proposed header (type categories, relationships, const/volatile/reference/array/pointer transformations)
Numerical facilities
- Random number generation framework (engines, distributions, random_device)
- Additional mathematical special functions listed for support
Containers
- Tuple and pair types, fixed-size array (), and unordered associative containers (unordered_set, unordered_map, unordered_multiset, unordered_multimap) including hash function requirements and exception-safety guarantees
Regular expressions
- A header, regex_traits, regex_error and matching APIs with options and match flags
C interoperability
- Facilities improving interaction with ISO/IEC 9899 (C) for better cross-language compatibility

The TR prescribes namespaces and headers, functional semantics, algorithms, exception-safety, and observable behavior required for implementers.

Applications and who uses it

ISO/IEC TR 19768:2007 is primarily useful to:

Library and compiler implementers - as guidance for adding standardized extensions to the C++ library
Tool and framework authors - who need standardized smart pointers, hashing, tuples, arrays, regex and RNG facilities
Developers in domains requiring numerical and statistical tools - who benefit from uniform random engines and specialized math functions
Teams working on C/C++ interoperability - to improve safe integration with C code

Adopting these extensions promotes portability, reduces ad‑hoc implementations, and speeds development of higher-level C++ applications.

Related standards

ISO/IEC 14882 - The C++ programming language standard
ISO/IEC 9899 - The C programming language standard

Keywords: ISO/IEC TR 19768:2007, C++ library extensions, C++ standard library, shared_ptr, type_traits, random number generation, unordered_map, regex, reference-counted pointers, metaprogramming.

ISO/IEC TR 19768:2007 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Похожие стандарты

Abstract

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Похожие стандарты

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