glib:with-variant ((var vclass value) &body body)

var -- a g:variant instance to create and initialize
vclass -- a g:variant-class value
value -- a value corresponding to vclass to set

The g:with-variant macro allocates a new g:variant instance, initializes it with the given value and executes the body that uses var. This macro creates variants with a full reference using the g:variant-ref-sink function.

After execution of the body the g:variant-unref function is called on var. This clears the memory used by the variant. This macro can only be used to create and initialise variants for basic types that have a g:variant-class value. The valid basic type strings are "b", "y", "n", "q", "i", "u", "x", "t", "h", "d", "s", "o", and "g".