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These tests just return true without checking that the results of the algorithms. Although it should be safe to assume that the algorithms behave the same at compile-time as at run-time, we can use these tests to verify it. This replaces each 'return true' statement with a condition that depends on the basic functionality of the algorithm, such as returning an iterator to the right position. libstdc++-v3/ChangeLog: * testsuite/25_algorithms/all_of/constexpr.cc: Check result of the algorithm. * testsuite/25_algorithms/any_of/constexpr.cc: Likewise. * testsuite/25_algorithms/binary_search/constexpr.cc: Likewise. * testsuite/25_algorithms/copy_backward/constexpr.cc: Likewise. * testsuite/25_algorithms/count/constexpr.cc: Likewise. * testsuite/25_algorithms/equal/constexpr.cc: Likewise. * testsuite/25_algorithms/equal_range/constexpr.cc: Likewise. * testsuite/25_algorithms/fill/constexpr.cc: Likewise. * testsuite/25_algorithms/find_end/constexpr.cc: Likewise. * testsuite/25_algorithms/find_if/constexpr.cc: Likewise. * testsuite/25_algorithms/is_partitioned/constexpr.cc: Likewise. * testsuite/25_algorithms/is_permutation/constexpr.cc: Likewise. * testsuite/25_algorithms/is_sorted_until/constexpr.cc: Likewise. * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: Likewise. * testsuite/25_algorithms/lower_bound/constexpr.cc: Likewise. * testsuite/25_algorithms/merge/constexpr.cc: Likewise. * testsuite/25_algorithms/mismatch/constexpr.cc: Likewise. * testsuite/25_algorithms/none_of/constexpr.cc: Likewise. * testsuite/25_algorithms/partition_copy/constexpr.cc: Likewise. * testsuite/25_algorithms/remove_copy/constexpr.cc: Likewise. * testsuite/25_algorithms/remove_copy_if/constexpr.cc: Likewise. * testsuite/25_algorithms/remove_if/constexpr.cc: Likewise. * testsuite/25_algorithms/replace_if/constexpr.cc: Likewise. * testsuite/25_algorithms/reverse/constexpr.cc: Likewise. * testsuite/25_algorithms/reverse_copy/constexpr.cc: Likewise. * testsuite/25_algorithms/rotate_copy/constexpr.cc: Likewise. * testsuite/25_algorithms/search/constexpr.cc: Likewise. * testsuite/25_algorithms/set_difference/constexpr.cc: Likewise. * testsuite/25_algorithms/set_intersection/constexpr.cc: Likewise. * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: Likewise. * testsuite/25_algorithms/set_union/constexpr.cc: Likewise. * testsuite/25_algorithms/unique_copy/constexpr.cc: Likewise. * testsuite/25_algorithms/upper_bound/constexpr.cc: Likewise.
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.