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These new (non-parallel) algorithms were added to C++17 along with the parallel algorithms, but were missing from libstdc++. * include/bits/algorithmfwd.h: Change title of doc group. * include/bits/stl_algo.h (for_each_n): Add new C++17 algorithm from P0024R2. * include/bits/stl_numeric.h: Define doc group and add algos to it. * include/std/numeric (__is_random_access_iter): New internal trait. (reduce, transform_reduce, exclusive_scan, inclusive_scan) (transform_exclusive_scan, transform_inclusive_scan): Likewise. * testsuite/25_algorithms/for_each/for_each_n.cc: New test. * testsuite/26_numerics/exclusive_scan/1.cc: New test. * testsuite/26_numerics/inclusive_scan/1.cc: New test. * testsuite/26_numerics/reduce/1.cc: New test. * testsuite/26_numerics/transform_exclusive_scan/1.cc: New test. * testsuite/26_numerics/transform_inclusive_scan/1.cc: New test. * testsuite/26_numerics/transform_reduce/1.cc: New test. * testsuite/util/testsuite_iterators.h (test_container::size()): New member function. From-SVN: r272459
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.