* parser.c (cp_parser_lambda_introducer): Use cp_parser_initializer.
	* pt.c (tsubst) [DECLTYPE_TYPE]: Handle DECLTYPE_FOR_INIT_CAPTURE.
	* semantics.c (lambda_capture_field_type): Use do_auto_deduction.
	(add_capture): Collapse a parenthesized initializer into a single
	expression.
	* cp-tree.h (DECLTYPE_FOR_INIT_CAPTURE): New.

From-SVN: r198246