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gcc/libstdc++-v3
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Jonathan Wakely c9dce3b15e libstdc++: Handle non-integral sizes in std::uninitialized_fill_n 
The std::uninitialized_fill_n algorithm uses sd::fill_n for trivial
types, but that algorithm has a stronger requirement that the Size
parameter is convertible to an integral type. As the new test shows,
there are types which are valid for std::uninitialized_fill_n but which
produce a different result when converted to an integral type, or cannot
be converted at all. Only use the std::fill_n optimization when the Size
type is already an integral type.

The std::__uninitialized_default_n extension has the same problem, and
so does C++17's std::uninitialized_value_construct_n which uses it.

	* include/bits/stl_uninitialized.h (uninitialized_fill_n): Only
	use std::fill_n when the size is an integral type.
	(__uninitialized_default_n): Likewise.
	* testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
	New test.
2020-06-17 20:55:06 +01:00
..
config Update the baseline symbols for SPARC64/Linux 2020-05-07 10:56:51 +02:00
doc libstdc++: Document API changes in GCC 10 2020-06-01 16:50:53 +01:00
include libstdc++: Handle non-integral sizes in std::uninitialized_fill_n 2020-06-17 20:55:06 +01:00
libsupc++ libstdc++: Fix the return type of __cxa_finalize 2020-05-04 23:07:19 +01:00
po Add `--with-toolexeclibdir=' configuration option 2020-01-24 11:24:25 +00:00
python libstdc++: Fix regression in libstdc++-prettyprinters/cxx20.cc 2020-02-17 13:20:57 +00:00
scripts Update copyright years. 2020-01-01 12:51:42 +01:00
src libstdc++: Fix istream::ignore discarding too many chars (PR 94749) 2020-06-11 18:41:37 +01:00
testsuite libstdc++: Handle non-integral sizes in std::uninitialized_fill_n 2020-06-17 20:55:06 +01:00
acinclude.m4 libstdc++: Replace glibc-specific check for clock_gettime (PR 93325) 2020-01-28 13:24:09 +00:00
aclocal.m4 Add `--with-toolexeclibdir=' configuration option 2020-01-24 11:24:25 +00:00
ChangeLog Daily bump. 2020-06-17 00:16:36 +00:00
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ChangeLog-2019 libstdc++: Fix whitespace in ChangeLog-2019 2020-01-09 21:31:35 +00:00
config.h.in
configure Check for more missing math decls on vxworks. 2020-05-31 14:32:27 -07:00
configure.ac
configure.host
crossconfig.m4 Check for more missing math decls on vxworks. 2020-05-31 14:32:27 -07:00
fragment.am
linkage.m4
Makefile.am Update copyright years. 2020-01-01 12:51:42 +01:00
Makefile.in Add `--with-toolexeclibdir=' configuration option 2020-01-24 11:24:25 +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.