[Bug c++/67810] Non-expression recognized as fold expression

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67810

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Oct  7 01:46:54 2015
New Revision: 228556

URL: https://gcc.gnu.org/viewcvs?rev=228556&root=gcc&view=rev
Log:
        PR c++/67810
        * parser.c (cp_parser_fold_expr_p): Remove.
        (is_binary_op): New.
        (cp_parser_fold_expression): Take LHS as parameter.
        (cp_parser_primary_expression): Call it after parsing an expression.
        (cp_parser_binary_expression, cp_parser_assignment_operator_opt)
        (cp_parser_expression): Ignore an operator followed by '...'.
        (is_binary_op): New.
        * pt.c (tsubst_unary_left_fold, tsubst_binary_left_fold)
        (tsubst_unary_right_fold, tsubst_binary_right_fold): Handle errors.

Added:
    trunk/gcc/testsuite/g++.dg/cpp1y/var-templ45.C
    trunk/gcc/testsuite/g++.dg/cpp1z/fold6.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/parser.c
    trunk/gcc/cp/pt.c
    trunk/gcc/testsuite/g++.dg/cpp1z/fold2.C