[Bug c++/71711] [6/7 Regression] ICE on valid C++1z code with fold expression: tree check: expected tree_vec, have expr_pack_expansion in tsubst_unary_left_fold, at cp/pt.c:10792

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71711

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Jul 15 18:38:23 2016
New Revision: 238390

URL: https://gcc.gnu.org/viewcvs?rev=238390&root=gcc&view=rev
Log:
        PR c++/71711 - mangle C++1z fold-expressions.

        * operators.def: Add *_FOLD_EXPR.
        * cp-tree.h (FOLD_EXPR_P): Parenthesize.
        * mangle.c (write_expression): Handle fold-expressions.
        * pt.c (tsubst_unary_left_fold, tsubst_binary_left_fold)
        (tsubst_unary_right_fold, tsubst_binary_right_fold): Handle
        partial instantiation.

Added:
    trunk/gcc/testsuite/g++.dg/cpp1z/fold-mangle.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/mangle.c
    trunk/gcc/cp/operators.def
    trunk/gcc/cp/pt.c