* cp-tree.def (UNARY_PLUS_EXPR): New C++ unary tree code.
	* parser.c (cp_parser_unary_expression): Use UNARY_PLUS_EXPR instead
	of CONVERT_EXPR.
	(cp_parser_unary_expression): Likewise.
	* typeck.c (build_unary_op): Likewise.
	* call.c (add_builtin_candidate, build_new_op): Likewise.
	* error.c (dump_expr): Likewise.
	* pt.c (tsubst_copy, tsubst_copy_and_build): Likewise.
	* decl.c (ambi_op_p, grok_op_properties): Likewise.
	* dump.c (dump_op): Likewise.
	* lex.c (init_operators): Likewise.
	* operators.def ("+"): Likewise.
	* cp-gimplify.c (cp_gimplify_expr): Handle UNARY_PLUS_EXPR like a
	conversion, if the result and argument types differ.
	* tree.c (fold_if_not_in_template): Fold UNARY_PLUS_EXPR much
	like a NOP_EXPR when !processing_template_decl.

	* cxx-pretty-print.c (pp_cxx_cast_expression): Prototype.
	(pp_cxx_unary_expression): Handle new UNARY_PLUS_EXPR tree code.

Co-Authored-By: Giovanni Bajo <giovannibajo@gcc.gnu.org>

From-SVN: r100285