gobject:with-value ((var &rest args) &body body)

gvalue -- a g:value instance to create and initialize
gtype -- an optional g:type-t type ID
value -- an optional value corresponding to gtype to set

The g:with-value macro allocates a new g:value instance, initializes it with the given values and executes the body that uses gvalue. After execution of the body the g:value-unset function is called on gvalue. This clears the current value in gvalue, unsets the type and releases all resources associated with gvalue. The gvalue parameter is initialized with the g:value-init function and unset with the g:value-unset function. The optional value ist set with the g:value-set function.