[Bug c++/80559] [7/8 Regression] Segmentation fault on invalid initialiser list template arguments

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80559

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
commit c2ab9194438e2805bdc12916ebf40890267d62f5
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Tue Oct 4 20:42:58 2016 +0000

    Implement P0091R2, Template argument deduction for class templates.

    * parser.c (cp_parser_simple_type_specifier): Parse class placeholder.
    Use the location of the beginning of the type-specifier.
    (cp_parser_init_declarator): Parse deduction guide.
    (cp_parser_diagnose_invalid_type_name): Mention class deduction.
    (cp_parser_type_id_1): Don't accept class placeholder as template arg.
    * cp-tree.h (CLASS_PLACEHOLDER_TEMPLATE): New.
    * decl.c (grokdeclarator): Check for uninitialized auto here.
    (start_decl_1): Not here.
    (cp_finish_decl): Or here.  Don't collapse a list when doing
    class deduction.
    (grokfndecl): Check deduction guide scope and body.
    * error.c (dump_decl, dump_function_decl, dump_function_name):
    Handle deduction guides.
    * pt.c (make_template_placeholder, do_class_deduction): New.
    (build_deduction_guide, rewrite_template_parm): New.
    (dguide_name, dguide_name_p, deduction_guide_p): New.
    (do_auto_deduction): Call do_class_deduction.
    (splice_late_return_type, is_auto): Handle class placeholders.
    (template_parms_level_to_args): Split from template_parms_to_args.
    (tsubst_template_parms_level): Split from tsubst_template_parms.
    * typeck2.c (build_functional_cast): Handle class placeholder.

    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@240756
138bc75d-0d04-0410-961f-82ee72b054a4