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PR c++/48322 gcc/cp/ * cp-tree.h (PACK_EXPANSION_EXTRA_ARGS): New. * cp-tree.def (EXPR_PACK_EXPANSION): Add an operand for it. * pt.c (tsubst_pack_expansion): Set and use it. (iterative_hash_template_arg): Hash it. (template_args_equal): Compare it. (comp_template_args_with_info): Handle nulls. * tree.c (cp_walk_subtrees): Walk it. * typeck.c (structural_comptypes): Compare it. * ptree.c (cxx_print_type): Print it. libstdc++-v3/ * include/std/tuple (tuple(_UElements&&...)): Fix SFINAE. From-SVN: r181547
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.