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c470f3ea86
gcc/libstdc++-v3
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Jonathan Wakely c470f3ea86 libstdc++: Make std::rethrow_if_nested work without RTTI 
This allows std::rethrow_if_nested to work with -fno-rtti by not
attempting the dynamic_cast if it requires RTTI, since that's ill-formed
with -fno-rtti. The cast will still work if a static upcast to
std::nested_exception is allowed.

Also use if-constexpr to avoid the compile-time overload resolution (and
SFINAE) and run-time dispatching for std::rethrow_if_nested and
std::throw_with_nested.

Also add better doxygen comments throughout the file.

libstdc++-v3/ChangeLog:

	* libsupc++/nested_exception.h (throw_with_nested) [C++17]: Use
	if-constexpr instead of tag dispatching.
	(rethrow_if_nested) [C++17]: Likewise.
	(rethrow_if_nested) [!__cpp_rtti]: Do not use dynamic_cast if it
	would require RTTI.
	* testsuite/18_support/nested_exception/rethrow_if_nested-term.cc:
	New test.
2022-05-13 20:39:59 +01:00
..
config libstdc++: Remove whitespace before preprocessor directives 2022-05-12 18:04:01 +01:00
doc libstdc++: Improve doxygen docs for <mutex> 2022-05-13 13:32:23 +01:00
include libstdc++: Improve doxygen docs for <mutex> 2022-05-13 13:32:23 +01:00
libsupc++ libstdc++: Make std::rethrow_if_nested work without RTTI 2022-05-13 20:39:59 +01:00
po libstdc++: Define <stacktrace> header for C++23 2022-01-17 12:13:02 +00:00
python libstdc++: Add pretty printer for std::atomic 2022-04-27 15:48:32 +01:00
scripts libstdc++: Only add valid -L paths to testsuite linker options 2022-01-20 12:29:29 +00:00
src libstdc++: Don't use std::tolower in <charconv> [PR103911] 2022-05-02 07:01:33 -04:00
testsuite libstdc++: Make std::rethrow_if_nested work without RTTI 2022-05-13 20:39:59 +01:00
acinclude.m4 libstdc++: Fix syntax error in libbacktrace configuration 2022-04-19 11:58:30 +01:00
aclocal.m4
ChangeLog Daily bump. 2022-05-13 00:16:30 +00:00
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ChangeLog-2020 libstdc++: Fix typo in ChangeLog-2020 2021-01-13 11:02:13 +00:00
ChangeLog-2021 Rotate ChangeLog files - part 1 - add ChangeLog-2021. 2022-01-03 10:18:16 +01:00
config.h.in libstdc++: Prefer to use mmap instead of malloc in libbacktrace 2022-04-12 22:38:31 +01:00
configure libstdc++: Fix syntax error in libbacktrace configuration 2022-04-19 11:58:30 +01:00
configure.ac libstdc++: Remove -gdwarf-4 from flags for debug library 2022-01-19 19:31:00 +00:00
configure.host
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. 2022-01-03 10:42:10 +01:00
Makefile.in libstdc++: Define <stacktrace> header for C++23 2022-01-17 12:13:02 +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.