glib:variant-type-is-tuple (vtype)

vtype -- a g:variant-type instance

True if vtype is a tuple type.

Determines if the given variant type is a tuple type. This is true if the variant type string for type starts with a ( type string or if type is a r type string. This function returns true for any indefinite type for which every definite subtype is a tuple type, the "r" type string, for example.