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walk_1.clj
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walk_1.clj
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; Copyright (c) Alan Thompson. All rights reserved.
; The use and distribution terms for this software are covered by the Eclipse Public
; License 1.0 (http://opensource.org/licenses/eclipse-1.0.php) which can be found in the
; file epl-v10.html at the root of this distribution. By using this software in any
; fashion, you are agreeing to be bound by the terms of this license.
; You must not remove this notice, or any other, from this software.
(ns tupelo.x.walk-1
(:use tupelo.core)
(:require
[schema.core :as s]
[tupelo.core :as t]
[tupelo.schema :as tsk]
[tupelo.string :as str]
))
(s/defn ctx->depth :- s/Int
"Returns the depth of recursion in a data structure, where {:branch :root} => 0"
[ctx :- tsk/KeyMap]
(let [parent (grab :parent ctx)]
(if (nil? parent)
0
(inc (ctx->depth parent)))))
(s/defn ^:no-doc apply-glue-not-nil :- s/Any
"Given a sequence of collections, remove any `nil` values, then combine. All non-nil
elements must be collections of the same type (eg all maps, all lists/vecs, etc) "
[colls :- [s/Any]]
(apply glue
(filterv not-nil? colls)))
(declare walk-with-context-dispatch)
;-----------------------------------------------------------------------------
(s/defn ^:no-doc proc-map-entry
[ctx-in :- tsk/KeyMap
interceptor :- tsk/KeyMap]
(t/with-spy-indent
(let [enter-fn (or (:enter interceptor) identity)
leave-fn (or (:leave interceptor) identity)]
; (nl) (spyq :map-entry--enter---------------------------------)
; (spyx-pretty ctx-in)
(let ; -spy-pretty
[ctx-post-enter (enter-fn ctx-in)
data (:data ctx-post-enter)
ctx-post-key (let [ctx-me-key {:data (:key data) :branch :map-entry/key :parent ctx-post-enter}]
(walk-with-context-dispatch ctx-me-key interceptor))
ctx-post-val (let [ctx-me-val {:data (:val data) :branch :map-entry/val :parent ctx-post-enter}]
(walk-with-context-dispatch ctx-me-val interceptor))
data-out {:key (grab :data ctx-post-key)
:val (grab :data ctx-post-val)}
ctx-post-recurse (glue ctx-post-enter {:data data-out})
ctx-post-leave (leave-fn ctx-post-recurse)
]
;(spyq :map-entry--leave---------------------------------)
;(nl)
ctx-post-leave))))
(s/defn ^:no-doc proc-map
[ctx-in :- tsk/KeyMap
interceptor :- tsk/KeyMap]
(t/with-spy-indent
(let [enter-fn (or (:enter interceptor) identity)
leave-fn (or (:leave interceptor) identity)]
;(nl) (spyq :map-enter---------------------------------)
;(spyx-pretty ctx-in)
(let ; -spy-pretty
[ctx-post-enter (enter-fn ctx-in)
data (grab :data ctx-post-enter)
ctx-subs (forv [me data] ; for each map-entry
(with-spy-indent
(let [ctx-me {:data {:key (key me)
:val (val me)}
:branch :map-entry
:parent ctx-post-enter}]
(proc-map-entry ctx-me interceptor))))
data-new (apply-glue-not-nil
(forv [me-spread (mapv :data ctx-subs)]
{(:key me-spread)
(:val me-spread)}))
ctx-post-recurse (glue ctx-post-enter {:data data-new})
ctx-post-leave (leave-fn ctx-post-recurse)]
;(spyq :map-leave---------------------------------)
;(nl)
ctx-post-leave))))
;-----------------------------------------------------------------------------
(s/defn ^:no-doc proc-set-entry
[ctx-in :- tsk/KeyMap
interceptor :- tsk/KeyMap]
(t/with-spy-indent
(let [enter-fn (or (:enter interceptor) identity)
leave-fn (or (:leave interceptor) identity)]
;(nl) (spyq :set-entry--enter---------------------------------)
;(spyx-pretty ctx-in)
(let ; -spy-pretty
[ctx-post-enter (enter-fn ctx-in)
data (:data ctx-post-enter)
ctx-post-key (let [ctx-me-key {:data (:val data) :branch :set-entry/elem :parent ctx-post-enter}]
(walk-with-context-dispatch ctx-me-key interceptor))
data-out {:val (grab :data ctx-post-key)}
ctx-post-recurse (glue ctx-post-enter {:data data-out})
ctx-post-leave (leave-fn ctx-post-recurse)
]
;(spyq :set-entry--leave---------------------------------)
;(nl)
ctx-post-leave))))
(s/defn ^:no-doc proc-set
[ctx-in :- tsk/KeyMap
interceptor :- tsk/KeyMap]
(t/with-spy-indent
(let [enter-fn (or (:enter interceptor) identity)
leave-fn (or (:leave interceptor) identity)]
;(nl) (spyq :set-enter---------------------------------)
;(spyx-pretty ctx-in)
(let ; -spy-pretty
[ctx-post-enter (enter-fn ctx-in)
data (grab :data ctx-post-enter)
ctx-subs (forv [se data] ; for each set-entry
(with-spy-indent
(let [ctx-se {:data {:val se}
:branch :set-entry
:parent ctx-post-enter}]
(proc-set-entry ctx-se interceptor))))
data-new (apply-glue-not-nil
(forv [se-spread (mapv :data ctx-subs)]
#{(:val se-spread)}))
ctx-post-recurse (glue ctx-post-enter {:data data-new})
ctx-post-leave (leave-fn ctx-post-recurse)]
;(spyq :set-leave---------------------------------)
;(nl)
ctx-post-leave))))
;-----------------------------------------------------------------------------
(s/defn ^:no-doc proc-list-entry
[ctx-in :- tsk/KeyMap
interceptor :- tsk/KeyMap]
(t/with-spy-indent
(let [enter-fn (or (:enter interceptor) identity)
leave-fn (or (:leave interceptor) identity)]
;(nl) (spyq :list-entry--enter---------------------------------)
;(spyx-pretty ctx-in)
(let ; -spy-pretty
[ctx-post-enter (enter-fn ctx-in)
data (grab :data ctx-post-enter)
ctx-post-idx (let [ctx-le-idx {:data (:idx data) :branch :list-entry/idx :parent ctx-post-enter}]
(walk-with-context-dispatch ctx-le-idx interceptor))
ctx-post-val (let [ctx-le-val {:data (:val data) :branch :list-entry/val :parent ctx-post-enter}]
(walk-with-context-dispatch ctx-le-val interceptor))
data-out {:idx (grab :data ctx-post-idx)
:val (grab :data ctx-post-val)}
ctx-post-recurse (glue ctx-post-enter {:data data-out})
ctx-post-leave (leave-fn ctx-post-recurse)
]
;(spyq :list-entry--leave---------------------------------)
;(nl)
ctx-post-leave))))
(s/defn ^:no-doc proc-list
[ctx-in :- tsk/KeyMap
interceptor :- tsk/KeyMap]
(t/with-spy-indent
(let [enter-fn (or (:enter interceptor) identity)
leave-fn (or (:leave interceptor) identity)]
;(nl) (spyq :list-enter---------------------------------)
;(spyx-pretty ctx-in)
(let ; -spy-pretty
[ctx-post-enter (enter-fn ctx-in)
data-indexed (t/indexed (grab :data ctx-post-enter))
ctx-subs (forv [le data-indexed] ; for each list-entry
(with-spy-indent
(let [ctx-le {:data {:idx (xfirst le)
:val (xsecond le)}
:branch :list-entry
:parent ctx-post-enter}]
(proc-list-entry ctx-le interceptor))))
data-new-sorted-map (into (sorted-map)
(apply-glue-not-nil
; #todo filter not-nil? here vvv !!!
(forv [le-spread (mapv :data ctx-subs)]
{(:idx le-spread)
(:val le-spread)})))
data-new (vec (vals data-new-sorted-map))
ctx-post-recurse (glue ctx-post-enter {:data data-new})
ctx-post-leave (leave-fn ctx-post-recurse)]
;(spyq :list-leave---------------------------------)
;(nl)
ctx-post-leave))))
;-----------------------------------------------------------------------------
(s/defn ^:no-doc proc-other
[ctx-in :- tsk/KeyMap
interceptor :- tsk/KeyMap]
(t/with-spy-indent
(let [enter-fn (or (:enter interceptor) identity)
leave-fn (or (:leave interceptor) identity)]
;(nl) (spyq :other-enter---------------------------------)
;(spyx-pretty ctx-in)
(let ; -spy-pretty
[ctx-post-enter (enter-fn ctx-in)
ctx-post-leave (leave-fn ctx-post-enter)]
;(spyq :other-leave---------------------------------)
;(nl)
ctx-post-leave))))
;-----------------------------------------------------------------------------
(s/defn ^:no-doc walk-with-context-dispatch ; dispatch fn
[ctx :- tsk/KeyMap
interceptor :- tsk/KeyMap]
(t/with-spy-indent
; (spyq :dispatch-enter---------------------------------)
(let [data (grab :data ctx)
ctx-out (cond
(t/xmap? data) (proc-map ctx interceptor)
(t/xsequential? data) (proc-list ctx interceptor)
(set? data) (proc-set ctx interceptor)
:else (proc-other ctx interceptor))]
; (spyq :dispatch-leave---------------------------------)
ctx-out)))
;-----------------------------------------------------------------------------
(s/defn walk-with-context :- s/Any
[data :- s/Any
interceptor :- tsk/KeyMap]
; (spyq :walk-enter---------------------------------)
(let [enter-fn (:enter interceptor) ; may be nil
leave-fn (:leave interceptor)] ; may be nil
(when (and (nil? enter-fn) (nil? leave-fn))
(throw (ex-info "Invalid interceptor. :enter and :leave functions cannot both be nil." (vals->map interceptor))))
(let ; -spy-pretty
[ctx-out (walk-with-context-dispatch {:branch :root :parent nil :data data} interceptor)
data-out (grab :data ctx-out)]
; (spyq :walk-leave---------------------------------)
data-out
)))