Keywords: ISO C++ , library

Chapter 1. Status
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## Chapter 1. Status

## Implementation Status

### C++ 1998/2003

#### Implementation Status

This status table is based on the table of contents of ISO/IEC 14882:2003.

This page describes the C++ support in mainline GCC SVN, not in any particular release.

Table 1.1. C++ 1998/2003 Implementation Status

Section | Description | Status | Comments
--- | --- | --- | ---
18 | Language support
18.1 | Types | Y |
18.2 | Implementation properties | Y |
18.2.1 | Numeric Limits |  |
18.2.1.1 | Class template `numeric_limits` | Y |
18.2.1.2 | `numeric_limits` members | Y |
18.2.1.3 | `float_round_style` | Y |
18.2.1.4 | `float_denorm_style` | Y |
18.2.1.5 | `numeric_limits` specializations | Y |
18.2.2 | C Library | Y |
18.3 | Start and termination | Y |
18.4 | Dynamic memory management | Y |
18.5 | Type identification |  |
18.5.1 | Class type_info | Y |
18.5.2 | Class bad_cast | Y |
18.5.3 | Class bad_typeid | Y |
18.6 | Exception handling |  |
18.6.1 | Class exception | Y |
18.6.2 | Violation exception-specifications | Y |
18.6.3 | Abnormal termination | Y |
18.6.4 | `uncaught_exception` | Y |
18.7 | Other runtime support | Y |
19 | Diagnostics
19.1 | Exception classes | Y |
19.2 | Assertions | Y |
19.3 | Error numbers | Y |
20 | General utilities
20.1 | Requirements | Y |
20.2 | Utility components |  |
20.2.1 | Operators | Y |
20.2.2 | `pair` | Y |
20.3 | Function objects |  |
20.3.1 | Base | Y |
20.3.2 | Arithmetic operation | Y |
20.3.3 | Comparisons | Y |
20.3.4 | Logical operations | Y |
20.3.5 | Negators | Y |
20.3.6 | Binders | Y |
20.3.7 | Adaptors for pointers to functions | Y |
20.3.8 | Adaptors for pointers to members | Y |
20.4 | Memory |  |
20.4.1 | The default allocator | Y |
20.4.2 | Raw storage iterator | Y |
20.4.3 | Temporary buffers | Y |
20.4.4 | Specialized algorithms | Y |
20.4.4.1 | `uninitialized_copy` | Y |
20.4.4.2 | `uninitialized_fill` | Y |
20.4.4.3 | `uninitialized_fill_n` | Y |
20.4.5 | Class template `auto_ptr` | Y |
20.4.6 | C library | Y |
21 | Strings
21.1 | Character traits |  |
21.1.1 | Character traits requirements | Y |
21.1.2 | traits typedef | Y |
21.1.3 | `char_traits` specializations |  |
21.1.3.1 | struct `char_traits<char>` | Y |
21.1.3.2 | struct `char_traits<wchar_t>` | Y |
21.2 | String classes | Y |
21.3 | Class template `basic_string` | Y |
21.4 | Null-terminated sequence utilities | Y | C library dependency
22 | Localization
22.1 | Locales |  |
22.1.1 | Class `locale` | Y |
22.1.2 | `locale` globals | Y |
22.1.3 | Convenience interfaces |  |
22.1.3.1 | Character classification | Y |
22.1.3.2 | Character conversions | Y |
22.2 | Standard locale categories |  |
22.2.1 | `ctype` | Y |
22.2.2 | Numeric |  |
22.2.2.1 | `num_get` | Y |
22.2.2.2 | `num_put` | Y |
22.2.3 | `num_punct` | Y |
22.2.4 | `collate` | Y |
22.2.5 | Time |  |
22.2.5.1 | `time_get` | Y |
22.2.5.2 | `time_get_byname` | Y |
22.2.5.3 | `time_put` | Y |
22.2.5.3 | `time_put_byname` | Y |
22.2.6 | Monetary |  |
22.2.6.1 | `money_get` | Y |
22.2.6.2 | `money_put` | Y |
22.2.6.3 | `money_punct` | Y |
22.2.6.4 | `money_punct_byname` | Y |
22.2.7 | `messages` | Y |
22.2.8 | Program-defined facets | Y |
22.3 | C Library Locales | Y |
23 | Containers
23.1 | Container requirements | Y |
23.2 | Sequence containers |  |
23.2.1 | Class template `deque` | Y |
23.2.2 | Class template `list` | Y |
23.2.3 | Adaptors |  |
23.2.3.1 | Class template `queue` | Y |
23.2.3.2 | Class template `priority_queue` | Y |
23.2.3.3 | Class template `stack` | Y |
23.2.4 | Class template `vector` | Y |
23.2.5 | Class `vector<bool>` | Y |
23.3 | Associative containers |  |
23.3.1 | Class template `map` | Y |
23.3.2 | Class template `multimap` | Y |
23.3.3 | Class template `set` | Y |
23.3.4 | Class template `multiset` | Y |
24 | Iterators
24.1 | Requirements | Y |
24.2 | Header `<iterator>` synopsis | Y |
24.3 | Iterator primitives | Y |
24.4 | Predefined iterators and Iterator adaptors |  |
24.4.1 | Reverse iterators | Y |
24.4.2 | Insert iterators | Y |
24.5 | Stream iterators |  |
24.5.1 | Class template `istream_iterator` | Y |
24.5.2 | Class template `ostream_iterator` | Y |
24.5.3 | Class template `istreambuf_iterator` | Y |
24.5.4 | Class template `ostreambuf_iterator` | Y |
25 | Algorithms
25.1 | Non-modifying sequence operations | Y |
25.2 | Mutating sequence operations | Y |
25.3 | Sorting and related operations | Y |
25.4 | C library algorithms | Y |
26 | Numerics
26.1 | Numeric type requirements | Y |
26.2 | Complex numbers | Y |
26.3 | Numeric arrays |  |
26.3.1 | Header `<valarray>` synopsis | Y |
26.3.2 | Class template `valarray` | Y |
26.3.3 | `valarray` non-member operations | Y |
26.3.4 | Class `slice` | Y |
26.3.5 | Class template `slice_array` | Y |
26.3.6 | Class `gslice` | Y |
26.3.7 | Class template `gslice_array` | Y |
26.3.8 | Class template `mask_array` | Y |
26.3.9 | Class template `indirect_array` | Y |
26.4 | Generalized numeric operations |  |
26.4.1 | `accumulate` | Y |
26.4.2 | `inner_product` | Y |
26.4.3 | `partial_sum` | Y |
26.4.4 | `adjacent_difference` | Y |
26.4.5 | iota | Y |
26.5 | C Library | Y |
27 | Input/output
27.1 | Requirements | Y |
27.2 | Forward declarations | Y |
27.3 | Standard iostream objects | Y |
27.3.1 | Narrow stream objects | Y |
27.3.2 | Wide stream objects | Y |
27.4 | Iostreams base classes | Y |
27.5 | Stream buffers | Y |
27.6 | Formatting and manipulators | Y |
27.7 | String-based streams | Y |
27.8 | File-based streams | Y |
Appendix D | Compatibility features
D.1 | Increment operator with bool operand |  |
D.2 | `static` keyword |  |
D.3 | Access declarations |  |
D.4 | Implicit conversion from const strings |  |
D.5 | C standard library headers |  |
D.6 | Old iostreams members |  |
D.7 | char* streams |  |

#### Implementation Specific Behavior

The ISO standard defines the following phrase:

> `[1.3.5] implementation-defined behavior`

>   Behavior, for a well-formed program construct and correct data, that depends on the implementation and that each implementation shall document.

We do so here, for the C++ library only. Behavior of the compiler, linker, runtime loader, and other elements of "the implementation" are documented elsewhere. Everything listed in Annex B, Implementation Qualities, are also part of the compiler, not the library.

For each entry, we give the section number of the standard, when applicable. This list is probably incomplet and inkorrekt.

[1.9]/11 #3 If `isatty(3)` is true, then interactive stream support is implied.

[17.4.4.5] Non-reentrant functions are probably best discussed in the various sections on multithreading (see above).

[18.1]/4 The type of `NULL` is described here.

[18.3]/8 Even though it's listed in the library sections, libstdc++ has zero control over what the cleanup code hands back to the runtime loader. Talk to the compiler people. :-)

[18.4.2.1]/5 (bad_alloc), [18.5.2]/5 (bad_cast), [18.5.3]/5 (bad_typeid), [18.6.1]/8 (exception), [18.6.2.1]/5 (bad_exception): The `what()` member function of class `std::exception`, and these other classes publicly derived from it, simply returns the name of the class. But they are the mangled names; you will need to call `c++filt` and pass the names as command-line parameters to demangle them, or call a runtime demangler function. (The classes in `<stdexcept>` have constructors which require an argument to use later for `what()` calls, so the problem of `what()`'s value does not arise in most user-defined exceptions.)

[18.5.1]/7 The return value of `std::type_info::name()` is the mangled type name (see the previous entry for more).

[20.1.5]/5 "Implementors are encouraged to supply libraries that can accept allocators that encapsulate more general memory models and that support non-equal instances. In such implementations, any requirements imposed on allocators by containers beyond those requirements that appear in Table 32, and the semantics of containers and algorithms when allocator instances compare non-equal, are implementation-defined." As yet we don't have any allocators which compare non-equal, so we can't describe how they behave.

[21.1.3.1]/3,4, [21.1.3.2]/2, [23.*]'s foo::iterator, [27.*]'s foo::*_type, others... Nope, these types are called implementation-defined because you shouldn't be taking advantage of their underlying types. Listing them here would defeat the purpose. :-)

[21.1.3.1]/5 I don't really know about the mbstate_t stuff... see the chapter 22 notes for what does exist.

[22.*] Anything and everything we have on locale implementation will be described over here.

[26.2.8]/9 I have no idea what `complex<T>`'s pow(0,0) returns.

[27.4.2.4]/2 Calling `std::ios_base::sync_with_stdio` after I/O has already been performed on the standard stream objects will flush the buffers, and destroy and recreate the underlying buffer instances. Whether or not the previously-written I/O is destroyed in this process depends mostly on the --enable-libio choice: for stdio, if the written data is already in the stdio buffer, the data may be completely safe!

[27.6.1.1.2], [27.6.2.3] The I/O sentry ctor and dtor can perform additional work than the minimum required. We are not currently taking advantage of this yet.

[27.7.1.3]/16, [27.8.1.4]/10 The effects of `pubsetbuf/setbuf` are described in this chapter.

[27.8.1.4]/16 Calling `fstream::sync` when a get area exists will... whatever `fflush()` does, I think.

### C++ 200x

This table is based on the table of contents of ISO/IEC Doc No: N3000=09-0190 Date: 2009-11-09 Working Draft, Standard for Programming Language C++

In this implementation `-std=gnu++0x` or `-std=c++0x` flags must be used to enable language and library features. See dialect options. The pre-defined symbol `__GXX_EXPERIMENTAL_CXX0X__` is used to check for the presence of the required flag.

This page describes the C++0x support in mainline GCC SVN, not in any particular release.

Table 1.2. C++ 200x Implementation Status

Section | Description | Status | Comments
--- | --- | --- | ---
18 | Language support
18.1 | General | Y |
18.2 | Types | Partial | Missing offsetof, max_align_t, nullptr_t
18.3 | Implementation properties |  |
18.3.1 | Numeric Limits |  |
18.3.1.1 | Class template `numeric_limits` | Y |
18.3.1.2 | `numeric_limits` members | Partial | Missing constexpr
18.3.1.3 | `float_round_style` | N |
18.3.1.4 | `float_denorm_style` | N |
18.3.1.5 | `numeric_limits` specializations | Y |
18.3.2 | C Library | Y |
18.4 | Integer types |  |
18.4.1 | Header `<cstdint>` synopsis | Y |
18.4.2 | The header `<stdint.h>` | Partial | May use configure-generated stdint.h via GCC_HEADER_STDINT
18.5 | Start and termination | Partial | Missing quick_exit, at_quick_exit
18.6 | Dynamic memory management | Y |
18.7 | Type identification |  |
18.7.1 | Class type_info | Y |
18.7.2 | Class type_index | N |
18.7.3 | Class bad_cast | Y |
18.7.4 | Class bad_typeid | Y |
18.8 | Exception handling |  |
18.8.1 | Class exception | Y |
18.8.2 | Violation exception-specifications | Y |
18.8.3 | Abnormal termination | Y |
18.8.4 | `uncaught_exception` | Y |
18.8.5 | Propagation | Y |
18.8.6 | Class `nested_exception` | Y |
18.9 | Initializer lists |  |
18.9.1 | Initializer list constructors | Y |
18.9.2 | Initializer list access | Y |
18.9.3 | Initializer list concept maps | N |
18.10 | Other runtime support | Y |
19 | Diagnostics
19.1 | General | Y |
19.2 | Exception classes | Y |
19.3 | Assertions | Y |
19.4 | Error numbers | Y |
19.5 | System error support |  |
19.5.1 | Class `error_category` | Y |
19.5.2 | Class `error_code` | Partial | Missing concept ErrorCodeEnum
19.5.3 | Class `error_condition` | Partial | Missing concept ErrorConditionEnum
19.5.4 | Comparison operators | Y |
19.5.5 | Class `system_error` | Y |
20 | General utilities
20.1 | General | Partial | Missing all concepts
20.2 | Concepts | N |
20.3 | Utility components |  |
20.3.1 | Operators | Y |
20.3.2 | `forward` and `move` helpers | Y |
20.3.3 | `pair` | Y |
20.3.4 | tuple-like access to `pair` | Y |
20.3.5 | Range concept maps for `pair` | N |
20.3.6 | Class template `bitset` | Partial | Missing constexpr
20.4 | Compile-time rational arithmetic |  |
20.4.1 | Class template `ratio` | Y |
20.4.2 | Arithmetic on `ratio` types | Y |
20.4.3 | Comparison of `ratio` types | Y |
20.4.4 | SI types | Y |
20.5 | Tuples |  |
20.5.1 | General | Y |
20.5.2 | Class template `tuple` | Partial | Missing range concept maps
20.6 | Metaprogramming and type traits |  |
20.6.1 | Requirements | Y |
20.6.2 | Header `<type_traits>` synopsis |  |
20.6.3 | Helper classes | Y |
20.6.4 | Unary Type Traits |  |
20.6.4.1 | Primary type categories | Y |
20.6.4.2 | Composite type traits | Y |
20.6.4.3 | Type properties | Partial | Missing is_system_layout
20.6.5 | Relationships between types | Y |
20.6.6 | Transformations between types |  |
20.6.6.1 | Const-volatile modifications | Y |
20.6.6.2 | Reference modifications | Y |
20.6.6.3 | Sign modifications | Y |
20.6.6.4 | Array modifications | Y |
20.6.6.5 | Pointer modifications | Y |
20.6.7 | Other transformations | Partial | Missing decay
20.7 | Function objects |  |
20.7.1 | Definitions | Y |
20.7.3 | Base | Y |
20.7.4 | Function object return types | Y |
20.7.5 | Class template `reference_wrapper` | Y |
20.7.6 | Identity operation | N |
20.7.7 | Arithmetic operation | Y |
20.7.8 | Comparisons | Y |
20.7.9 | Logical operations | Y |
20.7.10 | Bitwise operations | Y |
20.7.11 | Negators | Y |
20.7.12 | Template `function` and function template `bind` | Y |
20.7.13 | Adaptors for pointers to functions | Y |
20.7.14 | Adaptors for pointers to members | Y |
20.7.15 | Function template `mem_fn` | Y |
20.7.16 | Polymorphic function wrappers |  |
20.7.16.1 | Class `bad_function_call` | Y |
20.7.16.2 | Class template `function` | Y |
20.7.17 | Class template `hash` | Y |
20.7.18 | Class template `reference_closure` | N |
20.8 | Memory |  |
20.8.01 | Allocator argument tag | N |
20.8.02 | Allocators |  |
20.8.02.1 | General | Y |
20.8.02.2 | Allocator concept | N |
20.8.02.3 | Support for legacy allocators | N |
20.8.02.4 | Allocator and Legacy Allocator members | N |
20.8.03 | Allocator-related element concepts | N |
20.8.04 | Allocator propagation traits | N |
20.8.05 | Allocator propagation map | N |
20.8.06 | The default allocator | Y |
20.8.07 | Scoped allocator adaptor |  |
20.8.07.1 | `scoped_allocator_adaptor_base` | N |
20.8.07.2 | `scoped_allocator_adaptor constructors` | N |
20.8.07.3 | `scoped_allocator_adaptor2` | N |
20.8.07.3 | scoped_allocator_adaptor members | N |
20.8.07.4 | `scoped_allocator_adaptor globals` | N |
20.8.08 | Raw storage iterator | Y |
20.8.09 | Temporary buffers | Y |
20.8.10 | `construct_element` | N |
20.8.11 | Specialized algorithms |  |
20.8.11.1 | `addressof` | N |
20.8.11.2 | `uninitialized_copy` | Y |
20.8.11.3 | `uninitialized_fill` | Y |
20.8.11.4 | `uninitialized_fill_n` | Y |
20.8.12 | Class template `unique_ptr` | Y |
20.8.13 | Smart pointers |  |
20.8.13.1 | Class `bad_weak_ptr` | Y |
20.8.13.2 | Class template `shared_ptr` | Y | Uses code from boost::shared_ptr.
20.8.13.3 | Class template `weak_ptr` | Y |
20.8.13.4 | Class template `owner_less` | Y |
20.8.13.5 | Class template `emable_shared_from_this` | Y |
20.8.13.6 | `shared_ptr` atomic access | Partial |
20.8.13.7 | Pointer safety | Partial |
20.8.14 | Align | N |
20.8.15 | C library | Y |
20.9 | Time utilities |  |
20.9.1 | Clock requirements | Y |
20.9.2 | Time-related traits |  |
20.9.2.1 | `treat_as_floating_point` | Y |
20.9.2.2 | `duration_values` | Partial | Missing constexpr
20.9.2.3 | Specializations of `common_type` | Y |
20.9.3 | Class template `duration` | Partial | Missing constexpr
20.9.4 | Class template `time_point` | Partial | Missing constexpr
20.9.5 | Clocks |  |
20.9.5.1 | Class `system_clock` | Y |
20.9.5.2 | Class `monotonic_clock` | Y |
20.9.5.3 | Class `high_resolution_clock` | Y |
20.10 | Date and time functions | Y |
21 | Strings
21.1 | General | Y |
21.2 | Character traits |  |
21.2.1 | Character traits requirements | Y |
21.2.2 | traits typedef | Y |
21.2.3 | `char_traits` specializations |  |
21.2.3.1 | struct `char_traits<char>` | Partial | Missing constexpr
21.2.3.2 | struct `char_traits<char16_t>` | Partial | Missing constexpr
21.2.3.3 | struct `char_traits<char32_t>` | Partial | Missing constexpr
21.2.3.4 | struct `char_traits<wchar_t>` | Partial | Missing constexpr
21.3 | String classes | Y |
21.4 | Class template `basic_string` | Y |
21.5 | Numeric Conversions | Y |
21.6 | Null-terminated sequence utilities | Y | C library dependency
22 | Localization
22.1 | General | Y |
22.2 | Header `<locale>` synopsis | Y |
22.3 | Locales |  |
22.3.1 | Class `locale` | Y |
22.3.2 | `locale` globals | Y |
22.3.3 | Convenience interfaces |  |
22.3.3.1 | Character classification | Y |
22.3.3.2 | Conversions |  |
22.3.3.2.1 | Character | Y |
22.3.3.2.2 | String | N |
22.3.3.2.3 | Buffer | N |
22.4 | Standard locale categories |  |
22.4.1 | `ctype` | Y |
22.4.2 | Numeric |  |
22.4.2.1 | `num_get` | Y |
22.4.2.2 | `num_put` | Y |
22.4.3 | `num_punct` | Y |
22.4.4 | `collate` | Y |
22.4.5 | Time |  |
22.4.5.1 | `time_get` | Y |
22.4.5.2 | `time_get_byname` | Y |
22.4.5.3 | `time_put` | Y |
22.4.5.3 | `time_put_byname` | Y |
22.4.6 | Monetary |  |
22.4.6.1 | `money_get` | Y |
22.4.6.2 | `money_put` | Y |
22.4.6.3 | `money_punct` | Y |
22.4.6.4 | `money_punct_byname` | Y |
22.4.7 | `messages` | Y |
22.4.8 | Program-defined facets | Y |
22.5 | Standard code conversion facets | N |
22.6 | C Library Locales | Y |
23 | Containers
23.1 | General | Partial | Missing concepts
23.2 | Container requirements |  |
23.2.1 | General requirements | Partial | Missing construct_element
23.2.2 | Data races | Y |
23.3 | Sequence containers |  |
23.3.1 | Class template `array` | Partial | Missing constexpr
23.3.2 | Class template `deque` | Y |
23.3.3 | Class template `forward_list` | Y |
23.3.4 | Class template `list` | Y |
23.3.5 | Adaptors |  |
23.3.5.1 | Class template `queue` | Y |
23.3.5.2 | Class template `priority_queue` | Y |
23.3.5.3 | Class template `stack` | Y |
23.3.6 | Class template `vector` | Y |
23.3.7 | Class `vector<bool>` | Y |
23.4 | Associative containers |  |
23.4.1 | Class template `map` | Y |
23.4.2 | Class template `multimap` | Y |
23.4.3 | Class template `set` | Y |
23.4.4 | Class template `multiset` | Y |
23.5 | Unordered associative containers |  |
23.5.1 | Class template `unordered_map` | Y |
23.5.2 | Class template `unordered_multimap` | Y |
23.5.3 | Class template `unordered_set` | Y |
23.5.4 | Class template `unordered_multiset` | Y |
24 | Iterators
24.1 | General | Partial | Missing concepts
24.2 | Iterator concepts | N |
24.3 | Header `<iterator>` synopsis | Partial | Missing concepts
24.4 | Iterator operations | Y |
24.5 | Predefined iterators and Iterator adaptors |  |
24.5.1 | Reverse iterators | Y |
24.5.2 | Insert iterators | Y |
24.5.3 | Move iterators | Y |
24.6 | Stream iterators |  |
24.6.1 | Class template `istream_iterator` | Y |
24.6.2 | Class template `ostream_iterator` | Y |
24.6.3 | Class template `istreambuf_iterator` | Y |
24.6.4 | Class template `ostreambuf_iterator` | Y |
24.7 | Insert iterators |  |
24.7.1 | Class template `back_insert_iterator` | Y |
24.7.3 | Class template `front_insert_iterator` | Y |
24.7.5 | Class template `insert_iterator` | Y |
25 | Algorithms
25.1 | General | Partial | Missing concepts
25.2 | Header `<algorithm>` synopsis | Y |
25.3 | Non-modifying sequence operations | Y |
25.4 | Mutating sequence operations | Y |
25.5 | Sorting and related operations | Y |
25.6 | C library algorithms | Y |
26 | Numerics
26.1 | General | Y |
26.2 | Numeric type requirements | Y |
26.3 | The floating-point environment | Y |
26.4 | Complex numbers | Partial | Missing constexpr
26.5 | Random number generation |  |
26.5.1 | Header `<random>` synopsis | Partial | Missing concepts
26.5.2 | Concepts and related requirements | N |
26.5.3 | Random number engines |  |
26.5.3.1 | Class template `linear_congruential_engine` | Y | Missing constexpr
26.5.3.2 | Class template `mersenne_twister_engine` | Y | Missing constexpr
26.5.3.3 | Class template `subtract_with_carry_engine` | Y | Missing constexpr
26.5.4 | Random number engine adaptors |  |
26.5.4.1 | Class template `discard_block_engine` | Y | Missing constexpr
26.5.4.2 | Class template `independent_bits_engine` | Y | Missing constexpr
26.5.4.3 | Class template `shuffle_order_engine` | Y | Missing constexpr
26.5.5 | Engines and engine adaptors with predefined parameters | Y |
26.5.6 | Class `random_device` | Y | Missing constexpr
26.5.7 | Utilities |  |
26.5.7.1 | Class `seed_seq` | Y |
26.5.7.2 | Function template generate_canonical | Y |
26.5.8 | Random number distributions |  |
26.5.8.1 | Uniform distributions |  |
26.5.8.1.1 | Class template `uniform_int_distribution` | Y |
26.5.8.1.2 | Class template `uniform_real_distribution` | Y |
26.5.8.2 | Bernoulli distributions |  |
26.5.8.2.1 | Class `bernoulli_distribution` | Y |
26.5.8.2.2 | Class template `binomial_distribution` | Y |
26.5.8.2.3 | Class template `geometric_distribution` | Y |
26.5.8.2.4 | Class template `negative_binomial_distribution` | Y |
26.5.8.3 | Poisson distributions |  |
26.5.8.3.1 | Class template `poisson_distribution` | Y |
26.5.8.3.2 | Class template `exponential_distribution` | Y |
26.5.8.3.3 | Class template `gamma_distribution` | Y |
26.5.8.3.4 | Class template `weibull_distribution` | Y |
26.5.8.3.5 | Class template `extreme_value_distribution` | Y |
26.5.8.4 | Normal distributions |  |
26.5.8.4.1 | Class template `normal_distribution` | Y |
26.5.8.4.2 | Class template `lognormal_distribution` | Y |
26.5.8.4.3 | Class template `chi_squared_distribution` | Y |
26.5.8.4.4 | Class template `cauchy_distribution` | Y |
26.5.8.4.5 | Class template `fisher_f_distribution` | Y |
26.5.8.4.6 | Class template `student_t_distribution` | Y |
26.5.8.5 | Sampling distributions |  |
26.5.8.5.1 | Class template `discrete_distribution` | Y |
26.5.8.5.2 | Class template `piecewise_constant_distribution` | Y |
26.5.8.5.3 | Class template `piecewise_linear_distribution` | Y |
26.6 | Numeric arrays |  |
26.6.1 | Header `<valarray>` synopsis | Y |
26.6.2 | Class template `valarray` | Y |
26.6.3 | `valarray` non-member operations | Y |
26.6.4 | Class `slice` | Y |
26.6.5 | Class template `slice_array` | Y |
26.6.6 | Class `gslice` | Y |
26.6.7 | Class template `gslice_array` | Y |
26.6.8 | Class template `mask_array` | Y |
26.6.9 | Class template `indirect_array` | Y |
26.7 | Generalized numeric operations |  |
26.7.1 | `accumulate` | Y |
26.7.2 | `inner_product` | Y |
26.7.3 | `partial_sum` | Y |
26.7.4 | `adjacent_difference` | Y |
26.7.5 | iota | Y |
26.8 | C Library | Y |
27 | Input/output
27.1 | General | Y |
27.2 | Requirements | Y |
27.2.1 | Imbue limitations | Y |
27.2.2 | Positioning type limitations | Y |
27.2.3 | Thread safety | Partial |
27.3 | Forward declarations | Y |
27.4 | Standard iostream objects | Y |
27.4.1 | Narrow stream objects | Y |
27.4.2 | Wide stream objects | Y |
27.5 | Iostreams base classes | Y |
27.6 | Stream buffers | Y |
27.7 | Formatting and manipulators | Y |
27.8 | String-based streams | Y |
27.9 | File-based streams | Y |
28 | Regular expressions
28.01 | General | N |
28.02 | Definitions | N |
28.03 | Requirements | N |
28.04 | Regular expressions summary | N |
28.05 | Header `<regex>` synopsis | N |
28.06 | Namespace `std::regex_constants` | Y |
28.07 | Class `regex_error` | Y |
28.08 | Class template `regex_traits` | Partial |
28.09 | Class template `basic_regex` | Partial |
28.10 | Class template `sub_match` | Partial |
28.11 | Class template `match_results` | Partial |
28.12 | Regular expression algorithms | N |
28.13 | Regular expression Iterators | N |
28.14 | Modified ECMAScript regular expression grammar | N |
29 | Atomic operations
29.1 | General | Y |
29.2 | Header `<atomic>` synopsis | Y |
29.3 | Order and consistency | N |
29.4 | Lock-free property | Y | Based on _GLIBCXX_ATOMIC_PROPERTY
29.5 | Atomic types |  |
29.5.1 | Integral types | Y | Missing constexpr
29.5.2 | Address types | Y | Missing constexpr
29.5.3 | Generic types | Y | Missing constexpr
29.6 | Operations on atomic types | Y |
29.7 | Flag Type and operations | Y |
29.8 | Fences | N |
30 | Thread support
30.1 | General | Y |
30.2 | Requirements | Y |
30.3 | Threads |  |
30.3.1 | Class `thread` | Partial | Missing futures
30.3.2 | Namespace `this_thread` | Y |
30.4 | Mutual exclusion |  |
30.4.1 | Mutex requirements |  |
30.4.1.1 | Class `mutex` | Y |
30.4.1.2 | Class `recursive_mutex` | Y |
30.4.2 | Timed mutex requirements |  |
30.4.2.1 | Class `timed_mutex` | Y |
30.4.2.2 | Class `recursive_timed_mutex` | Y |
30.4.3 | Locks |  |
30.4.3.1 | Class template `lock_guard` | Y |
30.4.3.2 | Class template `unique_lock` | Y |
30.4.4 | Generic locking algorithms | Y |
30.4.5 | Call once |  |
30.4.5.1 | `once_flag` | Partial | Missing constexpr
30.4.5.2 | `call_once` | Y |
30.5 | Condition variables |  |
30.5.1 | Class `condition_variable` | Y |
30.5.2 | Class `condition_variable_any` | Partial |
30.6 | Futures |  |
30.6.1 | Overview | N |
30.6.2 | Error handling | N |
30.6.3 | Class `future_error` | N |
30.6.4 | Class template `unique_future` | N |
30.6.5 | Class template `shared_future` | N |
30.6.6 | Class template `promise` | N |
30.6.7 | Allocator templates | N |
30.6.8 | Class template `packaged_task` | N |
Appendix D | Compatibility features
D.1 | Increment operator with bool operand |  |
D.2 | `static` keyword |  |
D.3 | Access declarations |  |
D.4 | Implicit conversion from const strings |  |
D.5 | C standard library headers |  |
D.6 | Old iostreams members |  |
D.7 | char* streams |  |
D.8 | Binders |  |
D.9 | `auto_ptr` |  |
D.10 | Iterator primitives |  |

### C++ TR1

This table is based on the table of contents of ISO/IEC DTR 19768 Doc No: N1836=05-0096 Date: 2005-06-24 Draft Technical Report on C++ Library Extensions

In this implementation the header names are prefixed by `tr1/`, for instance `<tr1/functional>`, `<tr1/memory>`, and so on.

This page describes the TR1 support in mainline GCC SVN, not in any particular release.

Table 1.3. C++ TR1 Implementation Status

Section | Description | Status | Comments
--- | --- | --- | ---
2 | General Utilities
2.1 | Reference wrappers |  |
2.1.1 | Additions to header `<functional>` synopsis | Y |
2.1.2 | Class template `reference_wrapper` |  |
2.1.2.1 | `reference_wrapper` construct/copy/destroy | Y |
2.1.2.2 | `reference_wrapper` assignment | Y |
2.1.2.3 | `reference_wrapper` access | Y |
2.1.2.4 | `reference_wrapper` invocation | Y |
2.1.2.5 | `reference_wrapper` helper functions | Y |
2.2 | Smart pointers |  |
2.2.1 | Additions to header `<memory>` synopsis | Y |
2.2.2 | Class `bad_weak_ptr` | Y |
2.2.3 | Class template `shared_ptr` |  | Uses code from boost::shared_ptr.
2.2.3.1 | `shared_ptr` constructors | Y |
2.2.3.2 | `shared_ptr` destructor | Y |
2.2.3.3 | `shared_ptr` assignment | Y |
2.2.3.4 | `shared_ptr` modifiers | Y |
2.2.3.5 | `shared_ptr` observers | Y |
2.2.3.6 | `shared_ptr` comparison | Y |
2.2.3.7 | `shared_ptr` I/O | Y |
2.2.3.8 | `shared_ptr` specialized algorithms | Y |
2.2.3.9 | `shared_ptr` casts | Y |
2.2.3.10 | `get_deleter` | Y |
2.2.4 | Class template `weak_ptr` |  |
2.2.4.1 | `weak_ptr` constructors | Y |
2.2.4.2 | `weak_ptr` destructor | Y |
2.2.4.3 | `weak_ptr` assignment | Y |
2.2.4.4 | `weak_ptr` modifiers | Y |
2.2.4.5 | `weak_ptr` observers | Y |
2.2.4.6 | `weak_ptr` comparison | Y |
2.2.4.7 | `weak_ptr` specialized algorithms | Y |
2.2.5 | Class template `enable_shared_from_this` | Y |
3 | Function Objects
3.1 | Definitions | Y |
3.2 | Additions to `<functional> synopsis` | Y |
3.3 | Requirements | Y |
3.4 | Function return types | Y |
3.5 | Function template `mem_fn` | Y |
3.6 | Function object binders |  |
3.6.1 | Class template `is_bind_expression` | Y |
3.6.2 | Class template `is_placeholder` | Y |
3.6.3 | Function template `bind` | Y |
3.6.4 | Placeholders | Y |
3.7 | Polymorphic function wrappers |  |
3.7.1 | Class `bad_function_call``` | Y |
3.7.1.1 | `bad_function_call` constructor | Y |
3.7.2 | Class template `function` |  |
3.7.2.1 | `function` construct/copy/destroy | Y |
3.7.2.2 | `function` modifiers | Y |
3.7.2.3 | `function` capacity | Y |
3.7.2.4 | `function` invocation | Y |
3.7.2.5 | `function` target access | Y |
3.7.2.6 | undefined operators | Y |
3.7.2.7 | null pointer comparison operators | Y |
3.7.2.8 | specialized algorithms | Y |
4 | Metaprogramming and type traits
4.1 | Requirements | Y |
4.2 | Header `<type_traits>` synopsis | Y |
4.3 | Helper classes | Y |
4.4 | General Requirements | Y |
4.5 | Unary Type Traits |  |
4.5.1 | Primary Type Categories | Y |
4.5.2 | Composite type traits | Y |
4.5.3 | Type properties | Y |
4.6 | Relationships between types | Y |
4.7 | Transformations between types |  |
4.7.1 | Const-volatile modifications | Y |
4.7.2 | Reference modifications | Y |
4.7.3 | Array modifications | Y |
4.7.4 | Pointer modifications | Y |
4.8 | Other transformations | Y |
4.9 | Implementation requirements | Y |
5 | Numerical Facilities
5.1 | Random number generation |  |
5.1.1 | Requirements | Y |
5.1.2 | Header `<random>` synopsis | Y |
5.1.3 | Class template `variate_generator` | Y |
5.1.4 | Random number engine class templates | Y |
5.1.4.1 | Class template `linear_congruential` | Y |
5.1.4.2 | Class template `mersenne_twister` | Y |
5.1.4.3 | Class template `subtract_with_carry` | Y |
5.1.4.4 | Class template `subtract_with_carry_01` | Y |
5.1.4.5 | Class template `discard_block` | Y |
5.1.4.6 | Class template `xor_combine` | Y | operator()() per N2079
5.1.5 | Engines with predefined parameters | Y |
5.1.6 | Class `random_device` | Y |
5.1.7 | Random distribution class templates | Y |
5.1.7.1 | Class template `uniform_int` | Y |
5.1.7.2 | Class `bernoulli_distribution` | Y |
5.1.7.3 | Class template `geometric_distribution` | Y |
5.1.7.4 | Class template `poisson_distribution` | Y |
5.1.7.5 | Class template `binomial_distribution` | Y |
5.1.7.6 | Class template `uniform_real` | Y |
5.1.7.7 | Class template `exponential_distribution` | Y |
5.1.7.8 | Class template `normal_distribution` | Y |
5.1.7.9 | Class template `gamma_distribution` | Y |
5.2 | Mathematical special functions | Y |
5.2.1 | Additions to header `<cmath>` synopsis | Y |
5.2.1.1 | associated Laguerre polynomials | Y |
5.2.1.2 | associated Legendre functions | Y |
5.2.1.3 | beta function | Y |
5.2.1.4 | (complete) elliptic integral of the first kind | Y |
5.2.1.5 | (complete) elliptic integral of the second kind | Y |
5.2.1.6 | (complete) elliptic integral of the third kind | Y |
5.2.1.7 | confluent hypergeometric functions | Y |
5.2.1.8 | regular modified cylindrical Bessel functions | Y |
5.2.1.9 | cylindrical Bessel functions (of the first kind) | Y |
5.2.1.10 | irregular modified cylindrical Bessel functions | Y |
5.2.1.11 | cylindrical Neumann functions | Y |
5.2.1.12 | (incomplete) elliptic integral of the first kind | Y |
5.2.1.13 | (incomplete) elliptic integral of the second kind | Y |
5.2.1.14 | (incomplete) elliptic integral of the third kind | Y |
5.2.1.15 | exponential integral | Y |
5.2.1.16 | Hermite polynomials | Y |
5.2.1.17 | hypergeometric functions | Y |
5.2.1.18 | Laguerre polynomials | Y |
5.2.1.19 | Legendre polynomials | Y |
5.2.1.20 | Riemann zeta function | Y |
5.2.1.21 | spherical Bessel functions (of the first kind) | Y |
5.2.1.22 | spherical associated Legendre functions | Y |
5.2.1.23 | spherical Neumann functions | Y |
5.2.2 | Additions to header `<math.h>` synopsis | Y |
6 | Containers
6.1 | Tuple types | Y |
6.1.1 | Header `<tuple>` synopsis | Y |
6.1.2 | Additions to header `<utility>` synopsis | Y |
6.1.3 | Class template `tuple` | Y |
6.1.3.1 | Construction | Y |
6.1.3.2 | Tuple creation functions | Y |
6.1.3.3 | Tuple helper classes | Y |
6.1.3.4 | Element access | Y |
6.1.3.5 | Relational operators | Y |
6.1.4 | Pairs | Y |
6.2 | Fixed size array | Y |
6.2.1 | Header `<array>` synopsis | Y |
6.2.2 | Class template `array` | Y |
6.2.2.1 | `array` constructors, copy, and assignment | Y |
6.2.2.2 | `array` specialized algorithms | Y |
6.2.2.3 | `array` size | Y |
6.2.2.4 | Zero sized `array`s | Y |
6.2.2.5 | Tuple interface to class template `array` | Y |
6.3 | Unordered associative containers | Y |
6.3.1 | Unordered associative container requirements | Y |
6.3.1.1 | Exception safety guarantees | Y |
6.3.2 | Additions to header `<functional>` synopsis | Y |
6.3.3 | Class template `hash` | Y |
6.3.4 | Unordered associative container classes | Y |
6.3.4.1 | Header `<unordered_set>` synopsis | Y |
6.3.4.2 | Header `<unordered_map>` synopsis | Y |
6.3.4.3 | Class template `unordered_set` | Y |
6.3.4.3.1 | `unordered_set` constructors | Y |
6.3.4.3.2 | `unordered_set` swap | Y |
6.3.4.4 | Class template `unordered_map` | Y |
6.3.4.4.1 | `unordered_map` constructors | Y |
6.3.4.4.2 | `unordered_map` element access | Y |
6.3.4.4.3 | `unordered_map` swap | Y |
6.3.4.5 | Class template `unordered_multiset``` | Y |
6.3.4.5.1 | `unordered_multiset` constructors | Y |
6.3.4.5.2 | `unordered_multiset` swap | Y |
6.3.4.6 | Class template `unordered_multimap` | Y |
6.3.4.6.1 | `unordered_multimap` constructors | Y |
6.3.4.6.2 | `unordered_multimap` swap | Y |
7 | Regular Expressions
7.1 | Definitions | N |
7.2 | Requirements | N |
7.3 | Regular expressions summary | N |
7.4 | Header `<regex>` synopsis | N |
7.5 | Namespace `tr1::regex_constants` | N |
7.5.1 | Bitmask Type `syntax_option_type` | N |
7.5.2 | Bitmask Type `regex_constants::match_flag_type` | N |
7.5.3 | Implementation defined `error_type` | N |
7.6 | Class `regex_error` | N |
7.7 | Class template `regex_traits` | N |
7.8 | Class template `basic_regex` | N |
7.8.1 | `basic_regex` constants | N |
7.8.2 | `basic_regex` constructors | N |
7.8.3 | `basic_regex` assign | N |
7.8.4 | `basic_regex` constant operations | N |
7.8.5 | `basic_regex` locale | N |
7.8.6 | `basic_regex` swap | N |
7.8.7 | `basic_regex` non-member functions | N |
7.8.7.1 | `basic_regex` non-member swap | N |
7.9 | Class template `sub_match` | N |
7.9.1 | `sub_match` members | N |
7.9.2 | `sub_match` non-member operators | N |
7.10 | Class template `match_results` | N |
7.10.1 | `match_results` constructors | N |
7.10.2 | `match_results` size | N |
7.10.3 | `match_results` element access | N |
7.10.4 | `match_results` formatting | N |
7.10.5 | `match_results` allocator | N |
7.10.6 | `match_results` swap | N |
7.11 | Regular expression algorithms | N |
7.11.1 | exceptions | N |
7.11.2 | `regex_match` | N |
7.11.3 | `regex_search` | N |
7.11.4 | `regex_replace` | N |
7.12 | Regular expression Iterators | N |
7.12.1 | Class template `regex_iterator` | N |
7.12.1.1 | `regex_iterator` constructors | N |
7.12.1.2 | `regex_iterator` comparisons | N |
7.12.1.3 | `regex_iterator` dereference | N |
7.12.1.4 | `regex_iterator` increment | N |
7.12.2 | Class template `regex_token_iterator` | N |
7.12.2.1 | `regex_token_iterator` constructors | N |
7.12.2.2 | `regex_token_iterator` comparisons | N |
7.12.2.3 | `regex_token_iterator` dereference | N |
7.12.2.4 | `regex_token_iterator` increment | N |
7.13 | Modified ECMAScript regular expression grammar | N |
8 | C Compatibility
8.1 | Additions to header `<complex>` | Y |
8.1.1 | Synopsis | Y |
8.1.2 | Function `acos` | Y |
8.1.3 | Function `asin` | Y |
8.1.4 | Function `atan` | Y |
8.1.5 | Function `acosh` | Y |
8.1.6 | Function `asinh` | Y |
8.1.7 | Function `atanh` | Y |
8.1.8 | Function `fabs` | Y |
8.1.9 | Additional Overloads | Y |
8.2 | Header `<ccomplex>` | N | DR 551
8.3 | Header `<complex.h>` | N | DR 551
8.4 | Additions to header `<cctype>` | Y |
8.4.1 | Synopsis | Y |
8.4.2 | Function `isblank` | Y |
8.5 | Additions to header `<ctype.h>` | Y |
8.6 | Header `<cfenv>` | Y |
8.6.1 | Synopsis | Y |
8.6.2 | Definitions | Y |
8.7 | Header `<fenv.h>` | Y |
8.8 | Additions to header `<cfloat>` | Y |
8.9 | Additions to header `<float.h>` | Y |
8.10 | Additions to header `<ios>` | N |
8.10.1 | Synopsis | N |
8.10.2 | Function `hexfloat` | N |
8.11 | Header `<cinttypes>` | Y |
8.11.1 | Synopsis | Y | DR 557
8.11.2 | Definitions | Y |
8.12 | Header `<inttypes.h>` | Y |
8.13 | Additions to header `<climits>` | Y |
8.14 | Additions to header `<limits.h>` | Y |
8.15 | Additions to header `<locale>` | N |
8.16 | Additions to header `<cmath>` | Y |
8.16.1 | Synopsis | Y |
8.16.2 | Definitions | Y |
8.16.3 | Function template definitions | Y |
8.16.4 | Additional overloads | Y | DR 568; DR 550
8.17 | Additions to header `<math.h>` | Y |
8.18 | Additions to header `<cstdarg>` | Y |
8.19 | Additions to header `<stdarg.h>` | Y |
8.20 | The header `<cstdbool>` | Y |
8.21 | The header `<stdbool.h>` | Y |
8.22 | The header `<cstdint>` | Y |
8.22.1 | Synopsis | Y |
8.22.2 | Definitions | Y |
8.23 | The header `<stdint.h>` | Y |
8.24 | Additions to header `<cstdio>` | Y |
8.24.1 | Synopsis | Y |
8.24.2 | Definitions | Y |
8.24.3 | Additional format specifiers | Y | C library dependency
8.24.4 | Additions to header `<stdio.h>` | Y |
8.25 | Additions to header `<cstdlib>` | Y |
8.25.1 | Synopsis | Y |
8.25.2 | Definitions | Y |
8.25.3 | Function `abs` | Y |
8.25.4 | Function `div` | Y |
8.26 | Additions to header `<stdlib.h>` | Y |
8.27 | Header `<ctgmath>` | Y | DR 551
8.28 | Header `<tgmath.h>` | Y | DR 551
8.29 | Additions to header `<ctime>` | Y | C library dependency
8.30 | Additions to header `<cwchar>` | Y |
8.30.1 | Synopsis | Y |
8.30.2 | Definitions | Y |
8.30.3 | Additional wide format specifiers | Y | C library dependency
8.31 | Additions to header `<wchar.h>` | Y |
8.32 | Additions to header `<cwctype>` | Y |
8.32.1 | Synopsis | Y |
8.32.2 | Function `iswblank` | Y |
8.33 | Additions to header `<wctype.h>` | Y |

### C++ TR 24733

This table is based on the table of contents of ISO/IEC TR 24733 Date: 2009-08-28 Extension for the programming language C++ to support decimal floating-point arithmetic

This page describes the TR 24733 support in mainline GCC SVN, not in any particular release.

Table 1.4. C++ TR 24733 Implementation Status

Section | Description | Status | Comments
--- | --- | --- | ---
0 | Introduction
1 | Normative references
2 | Conventions
3 | Decimal floating-point types
3.1 | Characteristics of decimal floating-point types |  |
3.2 | Decimal Types |  |
3.2.1 | Class `decimal` synopsis | Partial | Missing declarations for formatted input/output; non-conforming extension for functions converting to integral type
3.2.2 | Class `decimal32` | Partial | Missing 3.2.2.5 conversion to integral type; conforming extension for conversion from scalar decimal floating-point
3.2.3 | Class `decimal64` | Partial | Missing 3.2.3.5 conversion to integral type; conforming extension for conversion from scalar decimal floating-point
3.2.4 | Class `decimal128` | Partial | Missing 3.2.4.5 conversion to integral type; conforming extension for conversion from scalar decimal floating-point
3.2.5 | Initialization from coefficient and exponent | Y |
3.2.6 | Conversion to generic floating-point type | Y |
3.2.7 | Unary arithmetic operators | Y |
3.2.8 | Binary arithmetic operators | Y |
3.2.9 | Comparison operators | Y |
3.2.10 | Formatted input | N |
3.2.11 | Formatted output | N |
3.3 | Additions to header `limits` | N |
3.4 | Headers `cfloat` and `float.h` |  |
3.4.2 | Additions to header `cfloat` synopsis | Y |
3.4.3 | Additions to header `float.h` synopsis | N |
3.4.4 | Maximum finite value | Y |
3.4.5 | Epsilon | Y |
3.4.6 | Minimum positive normal value | Y |
3.4.7 | Minimum positive subnormal value | Y |
3.4.8 | Evaluation format | Y |
3.5 | Additions to `cfenv` and `fenv.h` | Outside the scope of GCC |
3.6 | Additions to `cmath` and `math.h` | Outside the scope of GCC |
3.7 | Additions to `cstdio` and `stdio.h` | Outside the scope of GCC |
3.8 | Additions to `cstdlib` and `stdlib.h` | Outside the scope of GCC |
3.9 | Additions to `cwchar` and `wchar.h` | Outside the scope of GCC |
3.10 | Facets | N |
3.11 | Type traits | N |
3.12 | Hash functions | N |
4 | Notes on C compatibility

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