Programming with Schemas, part1

[ikitommi]

Programming schemas should be first-class. schema-tools is a good example of a great library in this space. We could start with m/merge which does potetially lossy merge like the clojure.core/merge does.

Default (overwriting keys):

(m/merge
  [:map
   [:x int?]
   [:y int?]]
  [:map
   [:x int?]
   [:y {:optional true} string?]]
  {:strategy :overwrite})
; [:map
;  [:x int?]
;  [:y {:optional true} string?]]

Compose leaves:

(m/merge
  [:map
   [:x int?]
   [:y int?]]
  [:map
   [:x int?]
   [:y {:optional true} string?]]
  {:strategy :merge})
; [:map
;  [:x int?]
;  [:y [:or int? string?]]]

Needs some discussion how to do this right.

Related: #37

[ikitommi]

Could we use meta-merge semantics here for finer-grained control on how to do things?