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This patch fixes 10 (!) PRs filed against the variadic templates implementation in 4.3. Most of the PRs are ice-on-invalid-code problems. However, this patch also contains a restructuring of coerce_template_parms, pulling out the functionality for coercing template parameter packs into a new function, coerce_template_parameter_pack. This restructuring it handles parameter packs not at the end of the template parameter list better, which can happen both in error cases and when there are template parameters in function templates that have default arguments and come *after* a parameter pack.
Testing i386-apple-darwin8.8.1 right now. Assuming no failures, okay to commit to mainline?
PR c++/31431 PR c++/31432 PR c++/31434 PR c++/31435 PR c++/31437 PR c++/31438 PR c++/31442 PR c++/31443 PR c++/31444 PR c++/31445 * error.c (dump_type): Dump TYPE_ARGUMENT_PACK nodes. * cp-tree.h (check_for_bare_parameter_packs): Returns bool. * pt.c (check_for_bare_parameter_packs): Return bool indicated whether everything was okay. Fix indentation. (push_template_decl_real): Check for bare parameter packs in function parameters; where errors occur, mark the parameter types with ERROR_MARK_NODEs to avert ICEs. (coerce_template_parameter_pack): New. (coerce_template_parms): Moved parameter pack coercion into coerce_template_parameter_pack, and permit it anywhere in the template parameter list (not just at the end). Parameter and argument indices can vary (somewhat) separately now, so add PARM_IDX and ARG_IDX. (fn_type_unification): Don't set an argument pack as incomplete if no argument pack was deduced. (type_unification_real): If a type parameter is a parameter pack and has not otherwise been deduced, it will be deduced to an empty parameter pack. (more_specialized_fn): Use the actual lengths of the argument lists when comparing against expansions. * semantics.c (finish_member_declaration): If a field's type has bare parameter packs, error and set its type to ERROR_MARK_NODE. 2007-04-16 Douglas Gregor <doug.gregor@gmail.com>
PR c++/31431 PR c++/31432 PR c++/31434 PR c++/31435 PR c++/31437 PR c++/31438 PR c++/31442 PR c++/31443 PR c++/31444 PR c++/31445 * g++.dg/cpp0x/pr31431.C: New. * g++.dg/cpp0x/pr31437.C: New. * g++.dg/cpp0x/pr31442.C: New. * g++.dg/cpp0x/pr31444.C: New. * g++.dg/cpp0x/pr31431-2.C: New. * g++.dg/cpp0x/pr31432.C: New. * g++.dg/cpp0x/pr31434.C: New. * g++.dg/cpp0x/pr31438.C: New. * g++.dg/cpp0x/pr31443.C: New. * g++.dg/cpp0x/pr31445.C: New. * g++.dg/cpp0x/variadic-crash1.C: New.
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