[ CCode ( cname = "g_double_equal" ) ]
public EqualFunc<double?> double_equal
Compares the two double values being pointed to and returns true if they are equal.
It can be passed to
g_hash_table_new as the
key_equal_func parameter, when using non-null
pointers to doubles as keys in a GenericSet.
a pointer to a double key
a pointer to a double key to compare with
true if the two keys match.