From: Jonathan Wakely Date: Tue, 7 Aug 2018 22:50:28 +0000 (+0100) Subject: Improve libstdc++ docs w.r.t newer C++ standards X-Git-Tag: releases/gcc-7.4.0~225 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db1e6ce9e8d50ee7975f8fa7e6a0c5ac5cdf425f;p=thirdparty%2Fgcc.git Improve libstdc++ docs w.r.t newer C++ standards Instead of repeating all the old headers for every new standard I've changed the docs to only list the new headers for each standard. Backport from mainline 2018-07-31 Jonathan Wakely * doc/xml/manual/test.xml: Improve documentation on writing tests for newer standards. * doc/xml/manual/using.xml: Document all headers for C++11 and later. * doc/html/*: Regenerate. From-SVN: r263378 --- diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 5df4cbcee233..dcf4f50ec2df 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,5 +1,13 @@ 2018-08-07 Jonathan Wakely + Backport from mainline + 2018-07-31 Jonathan Wakely + + * doc/xml/manual/test.xml: Improve documentation on writing tests for + newer standards. + * doc/xml/manual/using.xml: Document all headers for C++11 and later. + * doc/html/*: Regenerate. + Backport from mainline 2018-08-03 Jonathan Wakely diff --git a/libstdc++-v3/doc/html/manual/index.html b/libstdc++-v3/doc/html/manual/index.html index ec39379387d3..cd4c98913a51 100644 --- a/libstdc++-v3/doc/html/manual/index.html +++ b/libstdc++-v3/doc/html/manual/index.html @@ -149,7 +149,7 @@ Support for C++11 dialect.
22.10. Non-unique Mapping Containers
22.11. Point Iterator Hierarchy
22.12. Invalidation Guarantee Tags Hierarchy
22.13. Container Tag Hierarchy
22.14. Hash functions, ranged-hash functions, and range-hashing functions
22.15. Insert hash sequence diagram
22.16. Insert hash sequence diagram with a null policy
22.17. Hash policy class diagram
22.18. Balls and bins
22.19. Insert resize sequence diagram
22.20. Standard resize policy trigger sequence diagram
22.21. Standard resize policy size sequence - diagram
22.22. Tree node invariants
22.23. Tree node invalidation
22.24. A tree and its update policy
22.25. Restoring node invariants
22.26. Insert update sequence
22.27. Useless update path
22.28. A PATRICIA trie
22.29. A trie and its update policy
22.30. A simple list
22.31. The counter algorithm
22.32. Underlying Priority-Queue Data-Structures.
22.33. Priority-Queue Data-Structure Tags.
B.1. Configure and Build File Dependencies

List of Tables

1.1. C++ 1998/2003 Implementation Status
1.2. C++ 2011 Implementation Status
1.3. C++ 2014 Implementation Status
1.4. C++ Technical Specifications Implementation Status
1.5. C++ 2017 Implementation Status
1.6. C++ Technical Specifications Implementation Status
1.7. C++ TR1 Implementation Status
1.8. C++ TR 24733 Implementation Status
1.9. C++ Special Functions Implementation Status
3.1. C++ Command Options
3.2. C++ 1998 Library Headers
3.3. C++ 1998 Library Headers for C Library Facilities
3.4. C++ 2011 Library Headers
3.5. C++ 2011 Library Headers for C Library Facilities
3.6. C++ TR 1 Library Headers
3.7. C++ TR 1 Library Headers for C Library Facilities
3.8. C++ TR 24733 Decimal Floating-Point Header
3.9. C++ ABI Headers
3.10. Extension Headers
3.11. Extension Debug Headers
3.12. Extension Profile Headers
3.13. Extension Parallel Headers
17.1. Debugging Containers
17.2. Debugging Containers C++11
18.1. Parallel Algorithms
19.1. Profile Code Location
19.2. Profile Diagnostics
21.1. Bitmap Allocator Memory Map
B.1. Doxygen Prerequisites
B.2. HTML to Doxygen Markup Comparison
B.3. Docbook Prerequisites
B.4. HTML to Docbook XML Markup Comparison
B.5. Docbook XML Element Use
B.6. Extension Allocators
B.7. Extension Allocators Continued

List of Equations

22.1. Ranged Hash Function
22.2. Range-Hashing, Division Method
22.3. Division via Prime Modulo
22.4. Division via Bit Mask
22.5. + diagram
22.22. Tree node invariants
22.23. Tree node invalidation
22.24. A tree and its update policy
22.25. Restoring node invariants
22.26. Insert update sequence
22.27. Useless update path
22.28. A PATRICIA trie
22.29. A trie and its update policy
22.30. A simple list
22.31. The counter algorithm
22.32. Underlying Priority-Queue Data-Structures.
22.33. Priority-Queue Data-Structure Tags.
B.1. Configure and Build File Dependencies

List of Tables

1.1. C++ 1998/2003 Implementation Status
1.2. C++ 2011 Implementation Status
1.3. C++ 2014 Implementation Status
1.4. C++ Technical Specifications Implementation Status
1.5. C++ 2017 Implementation Status
1.6. C++ Technical Specifications Implementation Status
1.7. C++ TR1 Implementation Status
1.8. C++ TR 24733 Implementation Status
1.9. C++ Special Functions Implementation Status
3.1. C++ Command Options
3.2. C++ 1998 Library Headers
3.3. C++ 1998 Library Headers for C Library Facilities
3.4. C++ 1998 Deprecated Library Header
3.5. C++ 2011 Library Headers
3.6. C++ 2011 Library Headers for C Library Facilities
3.7. C++ 2014 Library Header
3.8. C++ 2017 Library Headers
3.9. C++ 2020 Library Headers
3.10. C++ 2020 Obsolete Headers
3.11. File System TS Header
3.12. Library Fundamentals TS Headers
3.13. C++ TR 1 Library Headers
3.14. C++ TR 1 Library Headers for C Library Facilities
3.15. C++ TR 24733 Decimal Floating-Point Header
3.16. C++ ABI Headers
3.17. Extension Headers
3.18. Extension Debug Headers
3.19. Extension Profile Headers
3.20. Extension Parallel Headers
17.1. Debugging Containers
17.2. Debugging Containers C++11
18.1. Parallel Algorithms
19.1. Profile Code Location
19.2. Profile Diagnostics
21.1. Bitmap Allocator Memory Map
B.1. Doxygen Prerequisites
B.2. HTML to Doxygen Markup Comparison
B.3. Docbook Prerequisites
B.4. HTML to Docbook XML Markup Comparison
B.5. Docbook XML Element Use
B.6. Extension Allocators
B.7. Extension Allocators Continued

List of Equations

22.1. Ranged Hash Function
22.2. Range-Hashing, Division Method
22.3. Division via Prime Modulo
22.4. Division via Bit Mask
22.5. A Standard String Hash Function
22.6. Only k String DNA Hash diff --git a/libstdc++-v3/doc/html/manual/test.html b/libstdc++-v3/doc/html/manual/test.html index aed5a320b56e..0d419b8f00be 100644 --- a/libstdc++-v3/doc/html/manual/test.html +++ b/libstdc++-v3/doc/html/manual/test.html @@ -456,12 +456,15 @@ cat 27_io/objects/char/3_xin.in | a.out

Similarly, tests which depend on a newer standard than the default - should use dg-options instead of an effective target, - so that they are not skipped by default. + must use dg-options instead of (or in addition to) + an effective target, so that they are not skipped by default. For example, tests for C++17 features should use 

    // { dg-options "-std=gnu++17" }

- and not -

    // { dg-do run "c++1z" }

+ before any dg-do such as: +

    // { dg-do run "c++17" }

+ The dg-options directive must come first, so that + the -std flag has already been added to the options + before checking the c++17 target.

Examples of Test Directives

Example 1: Testing compilation only: 

diff --git a/libstdc++-v3/doc/html/manual/using_headers.html b/libstdc++-v3/doc/html/manual/using_headers.html
index a25323d40ecc..0cdff59df5d4 100644
--- a/libstdc++-v3/doc/html/manual/using_headers.html
+++ b/libstdc++-v3/doc/html/manual/using_headers.html
@@ -4,7 +4,7 @@
      must be available to all hosted implementations.  Actually, the
      word "files" is a misnomer, since the contents of the
      headers don't necessarily have to be in any kind of external
-     file.  The only rule is that when one #include's a
+     file.  The only rule is that when one #includes a
      header, the contents of that header become available, no matter
      how.
    

@@ -12,25 +12,84 @@
    

      There are two main types of include files: header files related
      to a specific version of the ISO C++ standard (called Standard
-     Headers), and all others (TR1, C++ ABI, and Extensions).
+     Headers), and all others (TS, TR1, C++ ABI, and Extensions).
    

-     Two dialects of standard headers are supported, corresponding to
-     the 1998 standard as updated for 2003, and the current 2011 standard.
+     Multiple dialects of standard headers are supported, corresponding to
+     the 1998 standard as updated for 2003, the 2011 standard, the 2014
+     standard, and so on.
    

-     C++98/03 include files. These are available in the default compilation mode, i.e. -std=c++98 or -std=gnu++98.
-   
Table 3.2. C++ 1998 Library Headers
algorithmbitsetcomplexdequeexception
fstreamfunctionaliomanipiosiosfwd
iostreamistreamiteratorlimitslist
localemapmemorynewnumeric
ostreamqueuesetsstreamstack
stdexceptstreambufstringutilitytypeinfo
valarrayvector   

Table 3.3. C++ 1998 Library Headers for C Library Facilities
cassertcerrnocctypecfloatciso646
climitsclocalecmathcsetjmpcsignal
cstdargcstddefcstdiocstdlibcstring
ctimecwcharcwctype  


-C++11 include files. These are only available in C++11 compilation
+     Table 3.2, “C++ 1998 Library Headers” and
+     Table 3.3, “C++ 1998 Library Headers for C Library Facilities” and
+     Table 3.4, “C++ 1998 Deprecated Library Header”
+     show the C++98/03 include files.
+     These are available in the C++98 compilation mode,
+     i.e. -std=c++98 or -std=gnu++98.
+     Unless specified otherwise below, they are also available in later modes
+     (C++11, C++14 etc).
+   
Table 3.2. C++ 1998 Library Headers
algorithmbitsetcomplexdequeexception
fstreamfunctionaliomanipiosiosfwd
iostreamistreamiteratorlimitslist
localemapmemorynewnumeric
ostreamqueuesetsstreamstack
stdexceptstreambufstringutilitytypeinfo
valarrayvector 

Table 3.3. C++ 1998 Library Headers for C Library Facilities
cassertcerrnocctypecfloatciso646
climitsclocalecmathcsetjmpcsignal
cstdargcstddefcstdiocstdlibcstring
ctimecwcharcwctype 


+  The following header is deprecated
+  and might be removed from a future C++ standard.
+
Table 3.4. C++ 1998 Deprecated Library Header
strstream


+Table 3.5, “C++ 2011 Library Headers” and
+Table 3.6, “C++ 2011 Library Headers for C Library Facilities” show the C++11 include files.
+These are available in C++11 compilation
 mode, i.e. -std=c++11 or -std=gnu++11.
-
Table 3.4. C++ 2011 Library Headers
algorithmarraybitsetchronocomplex
condition_variabledequeexceptionforward_listfstream
functionalfutureinitalizer_listiomanipios
iosfwdiostreamistreamiteratorlimits
listlocalemapmemorymutex
newnumericostreamqueuerandom
ratioregexsetsstreamstack
stdexceptstreambufstringsystem_errorthread
tupletype_traitstypeinfounordered_mapunordered_set
utilityvalarrayvector  

Table 3.5. C++ 2011 Library Headers for C Library Facilities
cassertccomplexcctypecerrnocfenv
cfloatcinttypesciso646climitsclocale
cmathcsetjmpcsignalcstdargcstdbool
cstddefcstdintcstdlibcstdiocstring
ctgmathctimecucharcwcharcwctype


+Including these headers in C++98/03 mode may result in compilation errors.
+Unless specified otherwise below, they are also available in later modes
+(C++14 etc).
+
Table 3.5. C++ 2011 Library Headers
arrayatomicchronocodecvtcondition_variable
forward_listfutureinitalizer_listmutexrandom
ratioregexscoped_allocatorsystem_errorthread
tupletypeindextype_traitsunordered_mapunordered_set

Table 3.6. C++ 2011 Library Headers for C Library Facilities
ccomplexcfenvcinttypescstdaligncstdbool
cstdintctgmathcuchar 


+Table 3.7, “C++ 2014 Library Header” shows the C++14 include file.
+This is available in C++14 compilation
+mode, i.e. -std=c++14 or -std=gnu++14.
+Including this header in C++98/03 mode or C++11 will not result in
+compilation errors, but will not define anything.
+Unless specified otherwise below, it is also available in later modes
+(C++17 etc).
+
Table 3.7. C++ 2014 Library Header
shared_mutex


+Table 3.8, “C++ 2017 Library Headers” shows the C++17 include files.
+These are available in C++17 compilation
+mode, i.e. -std=c++17 or -std=gnu++17.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+Unless specified otherwise below, they are also available in later modes
+(C++20 etc).
+
Table 3.8. C++ 2017 Library Headers
anycharconvexecutionfilesystemmemory_resource
optionalstring_viewvariant 


+Table 3.9, “C++ 2020 Library Headers”
+shows the C++2a include files.
+These are available in C++2a compilation
+mode, i.e. -std=c++2a or -std=gnu++2a.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+
+
Table 3.9. C++ 2020 Library Headers
bitversion


+  The following headers have been removed in the C++2a working draft.
+  They are still available when using this implementation, but in future
+  they might start to produce warnings or errors when included in C++2a mode.
+  Programs that intend to be portable should not include them.
+
Table 3.10. C++ 2020 Obsolete Headers
ccomplexciso646cstdaligncstdboolctgmath


+Table 3.11, “File System TS Header”,
+shows the additional include file define by the
+File System Technical Specification, ISO/IEC TS 18822.
+This is available in C++11 and later compilation modes.
+Including this header in earlier modes will not result in
+compilation errors, but will not define anything.
+
Table 3.11. File System TS Header
experimental/filesystem


+Table 3.12, “Library Fundamentals TS Headers”,
+shows the additional include files define by the C++ Extensions for 
+Library Fundamentals Technical Specification, ISO/IEC TS 19568.
+These are available in C++14 and later compilation modes.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+
Table 3.12. Library Fundamentals TS Headers
experimental/algorithmexperimental/anyexperimental/arrayexperimental/chronoexperimental/deque
experimental/forward_listexperimental/functionalexperimental/iteratorexperimental/listexperimental/map
experimental/memoryexperimental/memory_resourceexperimental/optionalexperimental/propagate_constexperimental/random
experimental/ratioexperimental/regexexperimental/setexperimental/source_locationexperimental/string
experimental/string_viewexperimental/ssytem_errorexperimental/tupleexperimental/type_traitsexperimental/unordered_map
experimental/unordered_setexperimental/utilityexperimental/vector 


   In addition, TR1 includes as:
-
Table 3.6. C++ TR 1 Library Headers
tr1/arraytr1/complextr1/memorytr1/functionaltr1/random
tr1/regextr1/tupletr1/type_traitstr1/unordered_maptr1/unordered_set
tr1/utility    

Table 3.7. C++ TR 1 Library Headers for C Library Facilities
tr1/ccomplextr1/cfenvtr1/cfloattr1/cmathtr1/cinttypes
tr1/climitstr1/cstdargtr1/cstdbooltr1/cstdinttr1/cstdio
tr1/cstdlibtr1/ctgmathtr1/ctimetr1/cwchartr1/cwctype

Decimal floating-point arithmetic is available if the C++
+
Table 3.13. C++ TR 1 Library Headers
tr1/arraytr1/complextr1/memorytr1/functionaltr1/random
tr1/regextr1/tupletr1/type_traitstr1/unordered_maptr1/unordered_set
tr1/utility 

Table 3.14. C++ TR 1 Library Headers for C Library Facilities
tr1/ccomplextr1/cfenvtr1/cfloattr1/cmathtr1/cinttypes
tr1/climitstr1/cstdargtr1/cstdbooltr1/cstdinttr1/cstdio
tr1/cstdlibtr1/ctgmathtr1/ctimetr1/cwchartr1/cwctype

Decimal floating-point arithmetic is available if the C++
 compiler supports scalar decimal floating-point types defined via
 __attribute__((mode(SD|DD|LD))).
-
Table 3.8. C++ TR 24733 Decimal Floating-Point Header
decimal/decimal


+
Table 3.15. C++ TR 24733 Decimal Floating-Point Header
decimal/decimal


   Also included are files for the C++ ABI interface:
-
Table 3.9. C++ ABI Headers
cxxabi.hcxxabi_forced.h


+
Table 3.16. C++ ABI Headers
cxxabi.hcxxabi_forced.h


   And a large variety of extensions.
-
Table 3.10. Extension Headers
ext/algorithmext/atomicity.hext/array_allocator.hext/bitmap_allocator.hext/cast.h
ext/codecvt_specializations.hext/concurrence.hext/debug_allocator.hext/enc_filebuf.hext/extptr_allocator.h
ext/functionalext/iteratorext/malloc_allocator.hext/memoryext/mt_allocator.h
ext/new_allocator.hext/numericext/numeric_traits.hext/pb_ds/assoc_container.hext/pb_ds/priority_queue.h
ext/pod_char_traits.hext/pool_allocator.hext/rb_treeext/ropeext/slist
ext/stdio_filebuf.hext/stdio_sync_filebuf.hext/throw_allocator.hext/typelist.hext/type_traits.h
ext/vstring.h    

Table 3.11. Extension Debug Headers
debug/bitsetdebug/dequedebug/listdebug/mapdebug/set
debug/stringdebug/unordered_mapdebug/unordered_setdebug/vector 

Table 3.12. Extension Profile Headers
profile/bitsetprofile/dequeprofile/listprofile/map
profile/setprofile/unordered_mapprofile/unordered_setprofile/vector

Table 3.13. Extension Parallel Headers
parallel/algorithmparallel/numeric

Mixing Headers

A few simple rules. +

Table 3.17. Extension Headers

ext/algorithmext/atomicity.hext/array_allocator.hext/bitmap_allocator.hext/cast.h
ext/codecvt_specializations.hext/concurrence.hext/debug_allocator.hext/enc_filebuf.hext/extptr_allocator.h
ext/functionalext/iteratorext/malloc_allocator.hext/memoryext/mt_allocator.h
ext/new_allocator.hext/numericext/numeric_traits.hext/pb_ds/assoc_container.hext/pb_ds/priority_queue.h
ext/pod_char_traits.hext/pool_allocator.hext/rb_treeext/ropeext/slist
ext/stdio_filebuf.hext/stdio_sync_filebuf.hext/throw_allocator.hext/typelist.hext/type_traits.h
ext/vstring.h 

Table 3.18. Extension Debug Headers

debug/arraydebug/bitsetdebug/dequedebug/forward_listdebug/list
debug/mapdebug/setdebug/stringdebug/unordered_mapdebug/unordered_set
debug/vector 

Table 3.19. Extension Profile Headers

profile/bitsetprofile/dequeprofile/listprofile/map
profile/setprofile/unordered_mapprofile/unordered_setprofile/vector

Table 3.20. Extension Parallel Headers

parallel/algorithmparallel/numeric

Mixing Headers

A few simple rules.

First, mixing different dialects of the standard headers is not possible. It's an all-or-nothing affair. Thus, code like 

diff --git a/libstdc++-v3/doc/xml/manual/test.xml b/libstdc++-v3/doc/xml/manual/test.xml
index 154b74cbf9f0..ef0de7957544 100644
--- a/libstdc++-v3/doc/xml/manual/test.xml
+++ b/libstdc++-v3/doc/xml/manual/test.xml
@@ -753,12 +753,15 @@ cat 27_io/objects/char/3_xin.in | a.out
 
   
     Similarly, tests which depend on a newer standard than the default
-    should use dg-options instead of an effective target,
-    so that they are not skipped by default.
+    must use dg-options instead of (or in addition to)
+    an effective target, so that they are not skipped by default.
     For example, tests for C++17 features should use
     // { dg-options "-std=gnu++17" }
-    and not
-    // { dg-do run "c++1z" }
+    before any dg-do such as:
+    // { dg-do run "c++17" }
+    The dg-options directive must come first, so that
+    the -std flag has already been added to the options
+    before checking the c++17 target.
   
 
 
Examples of Test Directives
diff --git a/libstdc++-v3/doc/xml/manual/using.xml b/libstdc++-v3/doc/xml/manual/using.xml
index 992e4ecea8d0..a468c404cef3 100644
--- a/libstdc++-v3/doc/xml/manual/using.xml
+++ b/libstdc++-v3/doc/xml/manual/using.xml
@@ -126,7 +126,7 @@
      must be available to all hosted implementations.  Actually, the
      word "files" is a misnomer, since the contents of the
      headers don't necessarily have to be in any kind of external
-     file.  The only rule is that when one #include's a
+     file.  The only rule is that when one #includes a
      header, the contents of that header become available, no matter
      how.
    
@@ -138,16 +138,24 @@
    
      There are two main types of include files: header files related
      to a specific version of the ISO C++ standard (called Standard
-     Headers), and all others (TR1, C++ ABI, and Extensions).
+     Headers), and all others (TS, TR1, C++ ABI, and Extensions).
    
 
    
-     Two dialects of standard headers are supported, corresponding to
-     the 1998 standard as updated for 2003, and the current 2011 standard.
+     Multiple dialects of standard headers are supported, corresponding to
+     the 1998 standard as updated for 2003, the 2011 standard, the 2014
+     standard, and so on.
    
 
    
-     C++98/03 include files. These are available in the default compilation mode, i.e. -std=c++98 or -std=gnu++98.
+      and
+      and
+     
+     show the C++98/03 include files.
+     These are available in the C++98 compilation mode,
+     i.e. -std=c++98 or -std=gnu++98.
+     Unless specified otherwise below, they are also available in later modes
+     (C++11, C++14 etc).
    
 
 
@@ -205,6 +213,7 @@
 
 valarray
 vector
+
 
@@ -246,14 +255,38 @@
 ctimecwcharcwctype
+
 
 
 
 

 
 
 
 

 
 
-C++11 include files. These are only available in C++11 compilation
+  The following header is deprecated
+  and might be removed from a future C++ standard.
+
+
+
+C++ 1998 Deprecated Library Header
+
+
+
+
+
+strstream
+
+
+
+

+
+
+ and
+ show the C++11 include files.
+These are available in C++11 compilation
 mode, i.e. -std=c++11 or -std=gnu++11.
+Including these headers in C++98/03 mode may result in compilation errors.
+Unless specified otherwise below, they are also available in later modes
+(C++14 etc).
 
 
 
@@ -269,73 +302,33 @@ mode, i.e. -std=c++11 or -std=gnu++11.
 
 
 
-algorithm
 array
-bitset
+atomic
 chrono
-complex
-
-
+codecvt
 condition_variable
-deque
-exception
-forward_list
-fstream
 
 
-functional
+forward_list
 future
 initalizer_list
-iomanip
-ios
-
-
-iosfwd
-iostream
-istream
-iterator
-limits
-
-
-list
-locale
-map
-memory
 mutex
-
-
-new
-numeric
-ostream
-queue
 random
 
 
 ratio
 regex
-set
-sstream
-stack
-
-
-stdexcept
-streambuf
-string
+scoped_allocator
 system_error
 thread
 
 
 tuple
+typeindex
 type_traits
-typeinfo
 unordered_map
 unordered_set
 
-
-utility
-valarray
-vector
-
 
 
 
@@ -354,39 +347,231 @@ mode, i.e. -std=c++11 or -std=gnu++11.
 
 
 
-cassert
 ccomplex
-cctype
-cerrno
 cfenv
+cinttypes
+cstdalign
+cstdbool
 
 
-cfloat
-cinttypes
-ciso646
-climits
-clocale
+cstdint
+ctgmath
+cuchar
+
 
+
+
+
+
+
+ shows the C++14 include file.
+This is available in C++14 compilation
+mode, i.e. -std=c++14 or -std=gnu++14.
+Including this header in C++98/03 mode or C++11 will not result in
+compilation errors, but will not define anything.
+Unless specified otherwise below, it is also available in later modes
+(C++17 etc).
+
+
+
+
+C++ 2014 Library Header
+
+
+
+
-cmath
-csetjmp
-csignal
-cstdarg
-cstdbool
+shared_mutex
+
+
+
+

 

+
+
+ shows the C++17 include files.
+These are available in C++17 compilation
+mode, i.e. -std=c++17 or -std=gnu++17.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+Unless specified otherwise below, they are also available in later modes
+(C++20 etc).
+
+
+
+
+C++ 2017 Library Headers
+
+
+
+
+
+
+
+
+
+any
+charconv
+execution
+filesystem
+memory_resource
 
-cstddef
-cstdint
-cstdlib
-cstdio
-cstring
+optional
+string_view
+variant
+
 
+
+
+

 

+
+
+
+shows the C++2a include files.
+These are available in C++2a compilation
+mode, i.e. -std=c++2a or -std=gnu++2a.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+
+
+
+
+
+C++ 2020 Library Headers
+
+
+
+
+
+
+bit
+version
+
+
+
+
+

 

+
+
+  The following headers have been removed in the C++2a working draft.
+  They are still available when using this implementation, but in future
+  they might start to produce warnings or errors when included in C++2a mode.
+  Programs that intend to be portable should not include them.
+
+
+
+C++ 2020 Obsolete Headers
+
+
+
+
+
+
+
+
+
+ccomplex
+ciso646
+cstdalign
+cstdbool
 ctgmath
-ctime
-cuchar
-cwchar
-cwctype
+
+
+
+

+
+
+,
+shows the additional include file define by the
+File System Technical Specification, ISO/IEC TS 18822.
+This is available in C++11 and later compilation modes.
+Including this header in earlier modes will not result in
+compilation errors, but will not define anything.
+
+
+
+
+File System TS Header
+
+
+
+
+
+experimental/filesystem
+
+
+
+

+
+
+
+,
+shows the additional include files define by the C++ Extensions for 
+Library Fundamentals Technical Specification, ISO/IEC TS 19568.
+These are available in C++14 and later compilation modes.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+
+
+
+
+Library Fundamentals TS Headers
+
+
+
+
+
+
+
+
+
+experimental/algorithm
+experimental/any
+experimental/array
+experimental/chrono
+experimental/deque
+
+
+experimental/forward_list
+experimental/functional
+experimental/iterator
+experimental/list
+experimental/map
+
+
+experimental/memory
+experimental/memory_resource
+experimental/optional
+experimental/propagate_const
+experimental/random
+
+
+experimental/ratio
+experimental/regex
+experimental/set
+experimental/source_location
+experimental/string
+
+
+experimental/string_view
+experimental/ssytem_error
+experimental/tuple
+experimental/type_traits
+experimental/unordered_map
+
+
+experimental/unordered_set
+experimental/utility
+experimental/vector
+
 
@@ -424,6 +609,7 @@ mode, i.e. -std=c++11 or -std=gnu++11.
 
 tr1/utility
+
 
@@ -564,6 +750,7 @@ compiler supports scalar decimal floating-point types defined via
 
 ext/vstring.h
+
 
@@ -584,18 +771,22 @@ compiler supports scalar decimal floating-point types defined via
 
+debug/array
 debug/bitset
 debug/deque
+debug/forward_list
 debug/list
-debug/map
-debug/set
 
-
 
+debug/map
+debug/set
 debug/string
 debug/unordered_map
 debug/unordered_set
+
+
 debug/vector
+