The attached patch is a revised, and updated for mainline,
version of my earlier patch to add -var-info-path-expression.
The review of the previous version is at:

	http://article.gmane.org/gmane.comp.gdb.patches/32582

and asks for: 

	1. _() in some places.
	2. Not using of name of gdb function in mi error messages
	3. Points that path_expr != NULL implies it's not a root
	varobj.

Those changes were made. This version of patch builds,
and all MI tests pass. OK?

- Volodya

        Implement -var-info-path-expression.
        * mi/mi-cmds.h (mi_cmd_var_info_path_expression):
        Declare.
        * mi/mi-cmds.c (mi_cmds): Register var-info-path-expression.
        * mi/mi-cmd-var.c (mi_cmd_var_info_path_expression): New.
        * varobj.c (struct varobj): New field 'path_expr'.
        (c_path_expr_of_child, cplus_path_expr_of_child)
        (java_path_expr_of_child): New.
        (struct language_specific): New field path_expr_of_child.
        (varobj_create): Initialize the path_expr field.
        (varobj_get_path_expr): New.
        (new_variable): Initialize the path_expr field.
        (free_variable): Free the path_expr field.
        (adjust_value_for_children_access): New parameter
        WAS_TYPE.
        (c_number_of_children): Adjust.
        (c_describe_child): New parameter CFULL_EXPRESSION.
        Compute full expression.
        (c_value_of_child, c_type_of_child): Adjust.
        (cplus_number_of_children): Adjust.
        (cplus_describe_child): New parameter CFULL_EXPRESSION.
        Compute full expression.
        (cplus_name_of_child, cplus_value_of_child)
        (cplus_type_of_child): Adjust.
        * varobj.h (varobj_get_path_expr): Declare.