extend.texi (Volatiles): New node.

extend.texi (Volatiles): New node.

gcc/ChangeLog:
	* extend.texi (Volatiles): New node.
gcc/cp/ChangeLog:
	* cp-tree.h (convert_to_void): Prototype new function.
	(require_complete_type_in_void): Remove prototype.
	* cvt.c (convert_to_void): New function.
	(ocp_convert): Use convert_to_void.
	* decl.c (cplus_expand_expr_stmt): Likewise, for complete
	expressions.
	* typeck.c (require_complete_type_in_void): Remove function.
	(build_compound_expr): Use convert_to_void.
	(build_static_cast): Likewise.
	(build_c_cast): Likewise.
	* semantics.c (finish_expr_stmt): Do not decay full expressions.

	* typeck.c (build_x_compound_expr): Add FIXME.

From-SVN: r29233