+
+OSM_TYPE = {'N' : 'node', 'W' : 'way', 'R' : 'relation',
+ 'n' : 'node', 'w' : 'way', 'r' : 'relation',
+ 'node' : 'n', 'way' : 'w', 'relation' : 'r'}
+
+
+class OsmType:
+ """ Compares an OSM type, accepting both N/R/W and node/way/relation.
+ """
+
+ def __init__(self, value):
+ self.value = value
+
+
+ def __eq__(self, other):
+ return other == self.value or other == OSM_TYPE[self.value]
+
+
+ def __str__(self):
+ return f"{self.value} or {OSM_TYPE[self.value]}"
+
+
+class Field:
+ """ Generic comparator for fields, which looks at the type of the
+ value compared.
+ """
+ def __init__(self, value, **extra_args):
+ self.value = value
+ self.extra_args = extra_args
+
+ def __eq__(self, other):
+ if isinstance(self.value, float):
+ return math.isclose(self.value, float(other), **self.extra_args)
+
+ if self.value.startswith('^'):
+ return re.fullmatch(self.value, str(other))
+
+ if isinstance(other, dict):
+ return other == eval('{' + self.value + '}')
+
+ return str(self.value) == str(other)
+
+ def __str__(self):
+ return str(self.value)
+
+