pattern.matchers.map — com.github.pangloss/pattern 1.0.436

Matchers defined in this namespace are not available during bootstrap.

Because of that, they do have access to all of the features of the library.

match-*map clj

(match-*map [_ k v] comp-env)

Create a ?:*map matcher than can match a key/value pair multiple times.

match-+map clj

(match-+map [_ k v] comp-env)

Create a ?:+map matcher than can match a key/value pair at least once.

match-in-map clj

(match-in-map [t & kvs] comp-env)

match-map clj

(match-map [t & kv-pairs :as pattern] comp-env)

Match map datastructures. For instance to match {:from 1 :to 10}:

(?:map :from ?f :to ?t)

These would both work identically because the matcher will do some simple organization of the terms to try to maximize efficiency:

(?:map :addr ?addr ?addr ?info) (?:map ?addr ?info :addr ?addr)

If the pattern contains multiple keys meant to match the same key of the map, it will never match because after a key is matched, it is removed from the map matched by the next key/value matcher pair. Use & and | in either key or value position to apply multiple patterns to a single data key or value.

This matcher does not fail if there are extra keys in the map it's matching against unless you wrap them in ?:closed. To rule out specific keys, you can use ?:not matchers or predicates. For exact map matches, just use a literal map directly in the matcher.

match-map-literal clj

(match-map-literal the-map comp-env)