P0145R2: Refining Expression Order for C++.

P0145R2: Refining Expression Order for C++.

gcc/c-family/
	* c.opt (fargs-in-order): New.
	* c-opts.c (c_common_post_options): Adjust flag_args_in_order.
gcc/cp/
	* cp-tree.h (CALL_EXPR_OPERATOR_SYNTAX, CALL_EXPR_ORDERED_ARGS)
	(CALL_EXPR_REVERSE_ARGS): New.
	* call.c (build_new_op_1): Set them.
	(extract_call_expr, op_is_ordered): New.
	(build_over_call): Set CALL_EXPR_ORDERED_ARGS.
	* cp-gimplify.c (cp_gimplify_expr) [CALL_EXPR]: Handle new flags.
	* pt.c (tsubst_copy_and_build): Copy new flags.
	* semantics.c (simplify_aggr_init_expr): Likewise.
	* tree.c (build_aggr_init_expr): Likewise.
	(build_min_non_dep_op_overload): Likewise.

From-SVN: r237459