https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85749
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Tue May 15 15:36:46 2018 New Revision: 260263 URL: https://gcc.gnu.org/viewcvs?rev=260263&root=gcc&view=rev Log: PR libstdc++/85749 constrain seed sequences for random number engines Constrain constructors and member functions of random number engines so that functions taking seed sequences can only be called with types that meet the seed sequence requirements. PR libstdc++/85749 * include/bits/random.h (__detail::__is_seed_seq): New SFINAE helper. (linear_congruential_engine, mersenne_twister_engine) (subtract_with_carry_engine, discard_block_engine) (independent_bits_engine, shuffle_order_engine): Use __is_seed_seq to constrain function templates taking seed sequences. * include/bits/random.tcc (linear_congruential_engine::seed(_Sseq&)) (mersenne_twister_engine::seed(_Sseq&)) (subtract_with_carry_engine::seed(_Sseq&)): Change return types to match declarations. * include/ext/random (simd_fast_mersenne_twister_engine): Use __is_seed_seq to constrain function templates taking seed sequences. * include/ext/random.tcc (simd_fast_mersenne_twister_engine::seed): Change return type to match declaration. * testsuite/26_numerics/random/discard_block_engine/cons/seed_seq2.cc: New. * testsuite/26_numerics/random/independent_bits_engine/cons/ seed_seq2.cc: New. * testsuite/26_numerics/random/linear_congruential_engine/cons/ seed_seq2.cc: New. * testsuite/26_numerics/random/mersenne_twister_engine/cons/ seed_seq2.cc: New. * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno. * testsuite/26_numerics/random/shuffle_order_engine/cons/seed_seq2.cc: New. * testsuite/26_numerics/random/subtract_with_carry_engine/cons/ seed_seq2.cc: New. * testsuite/ext/random/simd_fast_mersenne_twister_engine/cons/ seed_seq2.cc: New. Added: trunk/libstdc++-v3/testsuite/26_numerics/random/discard_block_engine/cons/seed_seq2.cc trunk/libstdc++-v3/testsuite/26_numerics/random/independent_bits_engine/cons/seed_seq2.cc trunk/libstdc++-v3/testsuite/26_numerics/random/linear_congruential_engine/cons/seed_seq2.cc trunk/libstdc++-v3/testsuite/26_numerics/random/mersenne_twister_engine/cons/seed_seq2.cc trunk/libstdc++-v3/testsuite/26_numerics/random/shuffle_order_engine/cons/seed_seq2.cc trunk/libstdc++-v3/testsuite/26_numerics/random/subtract_with_carry_engine/cons/seed_seq2.cc trunk/libstdc++-v3/testsuite/ext/random/simd_fast_mersenne_twister_engine/cons/seed_seq2.cc Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/bits/random.h trunk/libstdc++-v3/include/bits/random.tcc trunk/libstdc++-v3/include/ext/random trunk/libstdc++-v3/include/ext/random.tcc trunk/libstdc++-v3/testsuite/26_numerics/random/pr60037-neg.cc
