2big commit: stand up fns, definitions and calls, lots of bugfixes
This commit is contained in:
Scott Richmond
parent
265f867a71
commit
8d3d9a2dc5
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@ -4,8 +4,10 @@
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(var stringify nil)
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(var match-pattern nil)
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(defn- todo [msg] (error (string "not yet implemented: " msg)))
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(defn- ltype [value]
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(def typed? (when (table? value) (:^type value)))
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(def typed? (when (dictionary? value) (value :^type)))
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(def the-type (if typed? typed? (type value)))
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(case the-type
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:boolean :bool
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@ -43,6 +45,10 @@
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(def val-len (length value))
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(var members (pattern :data))
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(def patt-len (length members))
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(when (empty? members)
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(break (if (empty? value)
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{:success true :ctx ctx}
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{:success false :miss [pattern value]})))
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(var splat nil)
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(def splat? (= :splat ((last members) :type)))
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(when splat?
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@ -128,6 +134,8 @@
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(set (ctx (bindings i)) (matches i)))
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{:success true :ctx ctx})
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(defn- match-dict [pattern value ctx] (todo "dict pattern"))
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(defn- match-pattern* [pattern value &opt ctx]
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(print "in match-pattern, matching " value " with:")
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(pp pattern)
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@ -149,7 +157,8 @@
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# TODO: lists, dicts
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:tuple (match-tuple pattern value ctx)
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:list (match-list pattern value ctx)
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# TODO: string-patterns
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:dict (match-dict pattern value ctx)
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:interpolated (match-string pattern value ctx)
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:typed (typed pattern value ctx)
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@ -164,57 +173,55 @@
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(if (match? :success)
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(do
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(merge-into ctx (match? :ctx))
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(print "new ctx:")
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(pp ctx)
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value)
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# TODO: represent patterns textually in errors
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(error {:node ast
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:msg (string "could not match " (stringify value))})))
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(error {:node ast :value value :msg "no match"})))
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(defn- matchh [ast ctx]
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(def [to-match clauses] (ast :data))
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(def value (interpret to-match ctx))
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(var result :^nothing)
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(each clause clauses
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(def len (length clauses))
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(when (ast :match) (break ((ast :match) 0 value ctx)))
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(defn match-fn [i value ctx]
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(when (= len i)
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(error {:node ast :value value :msg "no match"}))
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(def clause (clauses i))
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(def [patt guard expr] clause)
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(print "matching ")
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(pp patt)
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(def match? (match-pattern patt value))
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(when (match? :success)
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(def inner-ctx (match? :ctx))
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(def guard? (if (bool guard)
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(interpret guard inner-ctx) true))
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(when guard?
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(set result (interpret expr inner-ctx))
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(break))))
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(if (= result :^nothing)
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(error {:node ast :value value :msg "no match"})
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result))
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(def match? (match-pattern patt value @{:^parent ctx}))
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(when (not (match? :success))
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(break (match-fn (inc i) value ctx)))
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(def body-ctx (match? :ctx))
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(def guard? (if guard
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(bool (interpret guard body-ctx)) true))
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(when (not guard?)
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(break (match-fn (inc i) value ctx)))
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(interpret expr body-ctx))
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(set (ast :match) match-fn)
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(match-fn 0 value ctx))
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(defn- script [ast ctx]
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(def lines (ast :data))
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(var result nil)
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(each line lines
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(set result (interpret line ctx)))
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result)
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(def last-line (last lines))
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(for i 0 (-> lines length dec)
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(interpret (lines i) ctx))
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(interpret last-line ctx))
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(defn- block [ast parent]
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(def lines (ast :data))
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(var result nil)
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(def last-line (last lines))
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(def ctx @{:^parent parent})
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(each line lines
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(set result (interpret line ctx)))
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result)
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(for i 0 (-> lines length dec)
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(interpret (lines i) ctx))
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(interpret last-line ctx))
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(defn- dict-str [dict]
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(string/join
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(map
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(fn [[k v]] (string (stringify k) " " (stringify v)))
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dict)
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(pairs dict))
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", "))
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(defn- stringify* [value]
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(def typed? (when (table? value) (:^type value)))
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(def typed? (when (dictionary? value) (value :^type)))
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(def type (if typed? typed? (type value)))
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(print "stringifying " (string value))
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(case type
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@ -238,22 +245,21 @@
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(defn- stringish? [x] (or (string? x) (buffer? x)))
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(defn- to_string [ctx] (fn [x]
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(if (stringish? x) x (stringify (interpret x ctx)))))
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(defn- interpolated [ast ctx]
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(def terms (ast :data))
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(each term terms (pp term))
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(def interpolations
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(map (fn [x]
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(if (stringish? x) x (stringify (interpret x ctx))))
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terms))
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(def interpolations (map (to_string ctx) terms))
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(string/join interpolations))
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(defn- iff [ast ctx]
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(def [condition then else] (ast :data))
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(if (bool (interpret condition ctx))
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(interpret then ctx)
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(interpret else ctx)))
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# TODO: use a tail call here
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(defn- whenn [ast ctx]
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(def clauses (ast :data))
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(var result :^nothing)
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@ -267,15 +273,23 @@
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result)
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(defn- word [ast ctx]
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(def name (ast :data))
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(resolve-name name ctx))
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(resolve-name (ast :data) ctx))
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(defn- tup [ast ctx]
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(def members (ast :data))
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(def the-tup @[])
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(each member members
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(array/push the-tup (interpret member ctx)))
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(tuple ;the-tup))
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[;the-tup])
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(defn- args [ast ctx]
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(def members (ast :data))
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(def the-args @[])
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(each member members
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(array/push the-args (interpret member ctx)))
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(if (ast :partial)
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{:^type :partial :args the-args}
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[;the-args]))
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(defn- sett [ast ctx]
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(def members (ast :data))
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@ -312,6 +326,10 @@
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(merge-into the-dict splatted))
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(do
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(def [key-ast value-ast] (member :data))
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(print "dict key")
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(pp key-ast)
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(print "dict value")
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(pp value-ast)
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(def key (interpret key-ast ctx))
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(def value (interpret value-ast ctx))
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(set (the-dict key) value))))
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@ -334,6 +352,79 @@
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(def info (interpret (ast :data) ctx))
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(error {:node ast :msg info}))
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# TODO: add docstrings & pattern docs to fns
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# Depends on: good string representation of patterns
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# For now, this should be enough to tall the thing
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(defn- fnn [ast ctx]
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(def {:name name :data clauses} ast)
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(def the-fn @{:name name :^type :fn :body clauses :ctx ctx})
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(set (ctx name) the-fn))
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# TODO
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(defn- partial [the-fn args] (todo "partially applied functions"))
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(defn- call-fn [the-fn args]
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(print "calling fn " (the-fn :name))
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(print "with args " args)
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(def clauses (the-fn :body))
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(def len (length clauses))
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(when (the-fn :match) (break ((the-fn :match) 0 args)))
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(defn match-fn [i args]
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(when (= len i)
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(error {:node the-fn :value args :msg "no match"}))
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(def clause (clauses i))
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(def [patt guard expr] clause)
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(def match?
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(match-pattern patt args @{:^parent (the-fn :ctx)}))
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(when (not (match? :success))
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(break (match-fn (inc i) args)))
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(print "matched!")
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(def body-ctx (match? :ctx))
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(def guard? (if guard
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(bool (interpret guard body-ctx)) true))
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(print "passed guard")
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(when (not guard?)
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(break (match-fn (inc i) args)))
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(interpret expr body-ctx))
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(set (the-fn :match) match-fn)
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(match-fn 0 args))
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(defn- apply-synth-term [prev curr]
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(print "applying")
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(pp curr)
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(print "to")
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(pp prev)
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(def types [(ltype prev) (ltype curr)])
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(print "typle:")
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(pp types)
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(match types
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[:fn :tuple] (call-fn prev curr)
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[:fn :partial] (partial prev curr)
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[:keyword :args] (get (first curr) prev :^nil)
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[:dict :keyword] (get prev curr :^nil)
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[:nil :keyword] :^nil
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[:pkg :keyword] (get prev curr :^nil)
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[:pkg :pkg-kw] (get prev curr :^nil)))
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(defn- synthetic [ast ctx]
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(def terms (ast :data))
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(print "interpreting synthetic")
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(pp ast)
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(pp terms)
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(def first-term (first terms))
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(def last-term (last terms))
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(var prev (interpret first-term ctx))
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(print "root term: ")
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(pp prev)
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(for i 1 (-> terms length dec)
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(def curr (interpret (terms i) ctx))
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(print "term " i ": " curr)
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(set prev (apply-synth-term prev curr)))
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(print "done with inner terms, applying last term")
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(apply-synth-term prev (interpret last-term ctx)))
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(defn- doo [ast ctx] (todo "do expressions"))
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(defn- interpret* [ast ctx]
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(print "interpreting node " (ast :type))
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(case (ast :type)
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@ -343,9 +434,11 @@
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:bool (ast :data)
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:string (ast :data)
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:keyword (ast :data)
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:placeholder :_
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# collections
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:tuple (tup ast ctx)
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:args (args ast ctx)
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:list (list ast ctx)
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:set (sett ast ctx)
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:dict (dict ast ctx)
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@ -370,10 +463,13 @@
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# :with (withh ast ctx)
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# functions
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# :fn (fnn ast ctx)
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:fn (fnn ast ctx)
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# synthetic
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# :synthetic (synthetic ast ctx)
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:synthetic (synthetic ast ctx)
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# do
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:do (doo ast ctx)
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))
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@ -396,6 +492,8 @@
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(when (has-errors? parsed) (break (parsed :errors)))
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(def validated (v/valid parsed))
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(when (has-errors? validated) (break (validated :errors)))
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(def cleaned (get-in parsed [:ast :data 1]))
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(pp cleaned)
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(interpret (parsed :ast) @{})
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# (try (interpret (parsed :ast) @{})
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# ([e] (print "Ludus panicked!: "
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@ -404,8 +502,10 @@
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(do
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(set source `
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let verb = "love"
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"{verb}"
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fn foo () -> :foo
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let bar = #{foo}
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bar :foo ()
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`)
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(run)
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(def result (run))
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)
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@ -157,6 +157,12 @@
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{:type :keyword :data (curr :literal) :token curr}
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)
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(defn- kw-only [parser]
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(expect parser :keyword)
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(def curr (-> parser current))
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(advance parser)
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{:type :keyword :data (curr :literal) :token curr})
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(defn- nill [parser]
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(expect parser :nil)
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(def curr (current parser))
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@ -308,17 +314,17 @@
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(defrec synthetic [parser]
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(print "parsing synthetic")
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(def origin (current parser))
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(def ast {:type :synthetic :data @[(synth-root parser)] :token origin})
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# (def ast {:type :synthetic :data @[(synth-root parser)] :token origin})
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(def terms @[(synth-root parser)])
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(while (has-value? sequels (-> parser current type))
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(def term
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(case (-> parser current type)
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:lparen (args parser)
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:keyword (kw parser)
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:keyword (kw-only parser)
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))
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(array/push (ast :data) term)
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)
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ast
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(array/push terms term)
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)
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{:type :synthetic :data [;terms] :token origin})
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# collections
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(defn- tup [parser]
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@ -399,9 +405,13 @@
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(def origin (current parser))
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(def term (case (type origin)
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:splat {:type :splat :data (capture word-only (advance parser)) :token origin}
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:word (try (word-only parser) ([e] e))
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:word (do
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(def value (capture word-only parser))
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(def key {:type :keyword :data (keyword (value :data))
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:token origin})
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{:type :pair :data [key value] :token origin})
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:keyword (do
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(def key (try (kw parser) ([e] e)))
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(def key (capture kw parser))
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(def value (capture nonbinding parser))
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{:type :pair :data [key value] :token origin})
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(try (panic parser (string "expected dict term, got " (type origin))) ([e] e))
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@ -636,7 +646,7 @@
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(error {:type :error :token open-brace :msg "unclosed brace"}))
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(array/push clauses (match-clause parser)))
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(advance parser)
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{:type :match :data [to-match clauses] :token origin})
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@{:type :match :data [to-match clauses] :token origin})
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([err] err)))
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# {pattern} = {nonbinding} {terminators}
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@ -1096,17 +1106,18 @@
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(do
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# (comment
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(def source `
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"{bar}{quux}"
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(def source `a :b :c
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`)
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(def scanned (s/scan source))
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(print "\n***NEW PARSE***\n")
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(def a-parser (new-parser scanned))
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(def parsed (interpolated a-parser))
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(def parsed (expr a-parser))
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# (print (pp-ast parsed))
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(pp scanned)
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(pp parsed)
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# (pp scanned)
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# (pp parsed)
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(def cleaned (get-in parsed [:data 2]))
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(pp cleaned)
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)
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@ -272,7 +272,7 @@
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"-" (cond
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(= next ">") (add-token (advance scanner) :arrow)
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(digit? next) (add-number char scanner)
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:else (add-error scanner (string "Expected -> or negative number after `-`. Got `" char next "`")))
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:else (add-error scanner (string "Expected > or negative number after `-`. Got `" char next "`")))
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## dict #{
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"#" (if (= next "{")
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@ -4,6 +4,7 @@
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Tracking here, before I start writing this code, the kinds of validation we're hoping to accomplish:
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* [ ] ensure called keywords are only called w/ one arg
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* [ ] validate `with` forms
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* [ ] first-level property access with pkg, e.g. `Foo :bar`--bar must be on Foo
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- [ ] accept pkg-kws
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