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[library.general]

C++17 → C++20 7.2 KB 128 lines
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  This Clause describes the contents of the *C++ standard library*, how a
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  well-formed C++ program makes use of the library, and how a conforming
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  implementation may provide the entities in the library.
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- The following subclauses describe the definitions ([[definitions]]),
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- method of description ([[description]]), and organization (
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- [[organization]]) of the library. Clause  [[requirements]], Clauses 
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- [[language.support]] through  [[thread]], and Annex  [[depr]] specify
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- the contents of the library, as well as library requirements and
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- constraints on both well-formed C++programs and conforming
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- implementations.
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  Detailed specifications for each of the components in the library are in
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- Clauses  [[language.support]]– [[thread]], as shown in Table 
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- [[tab:library.categories]].
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-
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- The language support library (Clause  [[language.support]]) provides
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- components that are required by certain parts of the C++language, such
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- as memory allocation ([[expr.new]], [[expr.delete]]) and exception
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- processing (Clause  [[except]]).
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-
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- The diagnostics library (Clause  [[diagnostics]]) provides a consistent
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- framework for reporting errors in a C++program, including predefined
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- exception classes.
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-
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- The general utilities library (Clause  [[utilities]]) includes
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- components used by other library elements, such as a predefined storage
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- allocator for dynamic storage management ([[basic.stc.dynamic]]), and
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- components used as infrastructure in C++programs, such as tuples,
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- function wrappers, and time facilities.
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-
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- The strings library (Clause  [[strings]]) provides support for
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- manipulating text represented as sequences of type `char`, sequences of
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- type `char16_t`, sequences of type `char32_t`, sequences of type
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- `wchar_t`, and sequences of any other character-like type.
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-
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- The localization library (Clause  [[localization]]) provides extended
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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  internationalization support for text processing.
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- The containers (Clause  [[containers]]), iterators (Clause 
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- [[iterators]]), and algorithms (Clause  [[algorithms]]) libraries
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- provide a C++program with access to a subset of the most widely used
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- algorithms and data structures.
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- The numerics library (Clause  [[numerics]]) provides numeric algorithms
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- and complex number components that extend support for numeric
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- processing. The `valarray` component provides support for *n*-at-a-time
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- processing, potentially implemented as parallel operations on platforms
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- that support such processing. The random number component provides
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- facilities for generating pseudo-random numbers.
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- The input/output library (Clause  [[input.output]]) provides the
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- `iostream` components that are the primary mechanism for C++program
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- input and output. They can be used with other elements of the library,
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  particularly strings, locales, and iterators.
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- The regular expressions library (Clause  [[re]]) provides regular
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- expression matching and searching.
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- The atomic operations library (Clause  [[atomics]]) allows more
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- fine-grained concurrent access to shared data than is possible with
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- locks.
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- The thread support library (Clause  [[thread]]) provides components to
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- create and manage threads, including mutual exclusion and interthread
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  communication.
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  This Clause describes the contents of the *C++ standard library*, how a
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  well-formed C++ program makes use of the library, and how a conforming
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  implementation may provide the entities in the library.
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+ The following subclauses describe the definitions [[definitions]],
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+ method of description [[description]], and organization [[organization]]
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+ of the library. [[requirements]], [[support]] through [[thread]], and
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+ [[depr]] specify the contents of the library, as well as library
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+ requirements and constraints on both well-formed C++ programs and
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+ conforming implementations.
 
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  Detailed specifications for each of the components in the library are in
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+ [[support]]– [[thread]], as shown in [[library.categories]].
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+
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+ **Table: Library categories** <a id="library.categories">[library.categories]</a>
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+
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+ | Clause | Category |
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+ | ---------------- | --------------------------- |
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+ | [[support]] | Language support library |
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+ | [[concepts]] | Concepts library |
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+ | [[diagnostics]] | Diagnostics library |
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+ | [[utilities]] | General utilities library |
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+ | [[strings]] | Strings library |
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+ | [[containers]] | Containers library |
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+ | [[iterators]] | Iterators library |
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+ | [[ranges]] | Ranges library |
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+ | [[algorithms]] | Algorithms library |
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+ | [[numerics]] | Numerics library |
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+ | [[time]] | Time library |
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+ | [[localization]] | Localization library |
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+ | [[input.output]] | Input/output library |
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+ | [[re]] | Regular expressions library |
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+ | [[atomics]] | Atomic operations library |
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+ | [[thread]] | Thread support library |
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+
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+
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+ The language support library [[support]] provides components that are
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+ required by certain parts of the C++ language, such as memory
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+ allocation ([[expr.new]], [[expr.delete]]) and exception processing
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+ [[except]].
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+
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+ The concepts library [[concepts]] describes library components that C++
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+ programs may use to perform compile-time validation of template
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+ arguments and perform function dispatch based on properties of types.
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+
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+ The diagnostics library [[diagnostics]] provides a consistent framework
49
+ for reporting errors in a C++ program, including predefined exception
50
+ classes.
51
+
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+ The general utilities library [[utilities]] includes components used by
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+ other library elements, such as a predefined storage allocator for
54
+ dynamic storage management [[basic.stc.dynamic]], and components used as
55
+ infrastructure in C++ programs, such as tuples, function wrappers, and
56
+ time facilities.
57
+
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+ The strings library [[strings]] provides support for manipulating text
59
+ represented as sequences of type `char`, sequences of type `char8_t`,
60
+ sequences of type `char16_t`, sequences of type `char32_t`, sequences of
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+ type `wchar_t`, and sequences of any other character-like type.
62
+
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+ The localization library [[localization]] provides extended
64
  internationalization support for text processing.
65
 
66
+ The containers [[containers]], iterators [[iterators]], ranges
67
+ [[ranges]], and algorithms [[algorithms]] libraries provide a C++
68
+ program with access to a subset of the most widely used algorithms and
69
+ data structures.
70
 
71
+ The numerics library [[numerics]] provides numeric algorithms and
72
+ complex number components that extend support for numeric processing.
73
+ The `valarray` component provides support for *n*-at-a-time processing,
74
+ potentially implemented as parallel operations on platforms that support
75
+ such processing. The random number component provides facilities for
76
+ generating pseudo-random numbers.
77
 
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+ The input/output library [[input.output]] provides the `iostream`
79
+ components that are the primary mechanism for C++ program input and
80
+ output. They can be used with other elements of the library,
81
  particularly strings, locales, and iterators.
82
 
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+ The regular expressions library [[re]] provides regular expression
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+ matching and searching.
85
 
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+ The atomic operations library [[atomics]] allows more fine-grained
87
+ concurrent access to shared data than is possible with locks.
 
88
 
89
+ The thread support library [[thread]] provides components to create and
90
+ manage threads, including mutual exclusion and interthread
91
  communication.
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