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64acc43de1
gcc/libstdc++-v3
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Jonathan Wakely 64acc43de1 libstdc++: Avoid instantiation of _Hash_node before it's needed 
This is a step towards restoring support for incomplete types in
unordered containers (PR 53339).

We do not need to instantiate the node type to get its value_type
member, because we know that the value type is the first template
parameter. We can deduce that template argument using a custom trait and
a partial specialization for _Hash_node. If we wanted to support custom
hash node types we could still use typename _Tp::value_type in the
primary template of that trait, but that seems unnecessary.

The other change needed is to defer a static assert at class scope, so
that it is done when the types are complete. We must have a complete
type in the destructor, so we can do it there instead.

libstdc++-v3/ChangeLog:

	* include/bits/hashtable.h: Move static assertion to destructor.
	* include/bits/hashtable_policy.h: Deduce value type from node
	type without instantiating it.
2021-10-09 00:57:47 +01:00
..
config aix: Protect AIX math.h overloads with new macro. 2021-07-22 11:30:34 -04:00
doc libstdc++: Update documentation that only refers to c++98 and c++11 2021-09-16 23:06:38 +01:00
include libstdc++: Avoid instantiation of _Hash_node before it's needed 2021-10-09 00:57:47 +01:00
libsupc++ c++: implement C++17 hardware interference size 2021-09-13 12:28:06 -04:00
po Update copyright years. 2021-01-04 10:26:59 +01:00
python libstdc++: Fix vector<bool> printer tests to work in debug mode 2021-08-18 14:26:38 +01:00
scripts libstdc++: Allow lualatex to be used for Doxygen PDF 2021-05-17 12:13:41 +01:00
src libstdc++: Detect miscompilation of src/c++11/limits.cc 2021-10-08 15:51:08 +01:00
testsuite libstdc++: Implement ostream insertion for chrono::duration 2021-10-08 12:19:19 +01:00
acinclude.m4 ctype support for libstdc++ on VxWorks 2021-05-04 21:49:43 -03:00
aclocal.m4
ChangeLog Daily bump. 2021-10-08 00:16:28 +00:00
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ChangeLog-2020 libstdc++: Fix typo in ChangeLog-2020 2021-01-13 11:02:13 +00:00
config.h.in libstdc++: Use secure_getenv for filesystem::temp_directory_path() [PR65018] 2021-07-30 18:12:39 +01:00
configure libstdc++: Check for TLS support on mingw cross-compilers 2021-09-15 09:49:33 +01:00
configure.ac libstdc++: Fix broken autoconf check for O_NONBLOCK 2021-08-31 17:38:27 +01:00
configure.host Scope libstdc++ configuration for vxworks to all versions 2020-10-22 16:40:57 +00:00
crossconfig.m4 libstdc++: Check for TLS support on mingw cross-compilers 2021-09-15 09:49:33 +01:00
fragment.am libstdc++: Add C++ runtime support for new 128-bit long double format 2020-12-16 23:25:01 +00:00
linkage.m4
Makefile.am Update copyright years. 2021-01-04 10:26:59 +01:00
Makefile.in libstdc++: Add C++ runtime support for new 128-bit long double format 2020-12-16 23:25:01 +00:00
README

README 

file: libstdc++-v3/README

New users may wish to point their web browsers to the file
index.html in the 'doc/html' subdirectory.  It contains brief
building instructions and notes on how to configure the library in
interesting ways.