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(.module:
[lux #- Scope]
(lux (control [state]
["ex" exception #+ Exception exception:]
[monad #+ do])
(data [product]
[error #+ Error]
[number]
(coll (dictionary ["dict" unordered #+ Dict])))
[function])
[//reference #+ Register Variable Reference]
[//analysis #+ Environment Special Analysis])
(type: #export Arity Nat)
(type: #export Resolver (Dict Variable Variable))
(type: #export State
{#scope-arity Arity
#resolver Resolver
#direct? Bool
#locals Nat})
(def: #export fresh-resolver
Resolver
(dict.new //reference.Hash<Variable>))
(def: #export init
State
{#scope-arity +0
#resolver fresh-resolver
#direct? false
#locals +0})
(type: (Operation' s o)
(state.State' Error s o))
(type: #export (Compiler s i o)
(-> i (Operation' ..State o)))
(type: #export Primitive
(#Bool Bool)
(#I64 I64)
(#F64 Frac)
(#Text Text))
(type: #export (Structure a)
(#Variant (//analysis.Variant a))
(#Tuple (//analysis.Tuple a)))
(type: #export Side
(Either Nat Nat))
(type: #export Member
(Either Nat Nat))
(type: #export Access
(#Side Side)
(#Member Member))
(type: #export (Path' s)
#Pop
(#Test Primitive)
(#Access Access)
(#Bind Register)
(#Alt (Path' s) (Path' s))
(#Seq (Path' s) (Path' s))
(#Then s))
(type: #export (Abstraction' s)
{#environment Environment
#arity Arity
#body s})
(type: #export (Branch s)
(#Case s (Path' s))
(#Let s Register s)
(#If s s s)
(#Exec s))
(type: #export (Scope s)
{#start Register
#inits (List s)
#iteration s})
(type: #export (Loop s)
(#Scope (Scope s))
(#Recur (List s)))
(type: #export (Function s)
(#Abstraction (Abstraction' s))
(#Apply s (List s)))
(type: #export (Control s)
(#Branch (Branch s))
(#Loop (Loop s))
(#Function (Function s)))
(type: #export #rec Synthesis
(#Primitive Primitive)
(#Structure (Structure Synthesis))
(#Reference Reference)
(#Control (Control Synthesis))
(#Special (Special Synthesis)))
(type: #export Path
(Path' Synthesis))
(def: #export path/pop
Path
#Pop)
(do-template [<name> <tag>]
[(template: #export (<name> content)
(#..Test (<tag> content)))]
[path/bool #..Bool]
[path/i64 #..I64]
[path/f64 #..F64]
[path/text #..Text]
)
(do-template [<name> <tag>]
[(template: #export (<name> content)
(<tag> content))]
[path/alt #..Alt]
[path/seq #..Seq]
[path/then #..Then]
)
(type: #export Abstraction
(Abstraction' Synthesis))
(type: #export (Operation a)
(Operation' ..State a))
(def: #export unit Text "")
(type: #export Synthesizer
(Compiler ..State Analysis Synthesis))
(def: #export (throw exception parameters)
(All [e] (-> (Exception e) e Operation'))
(state.lift error.Monad<Error>
(ex.throw exception parameters)))
(def: #export (run synthesizer analysis)
(-> Synthesizer Analysis (Error Synthesis))
(:: error.Monad<Error> map product.right
(synthesizer analysis ..init)))
(def: (localized' transform)
(-> (-> State State)
(All [a] (-> (Operation a) (Operation a))))
(function (_ operation)
(function (_ state)
(case (operation (transform state))
(#error.Error error)
(#error.Error error)
(#error.Success [state' output])
(#error.Success [state output])))))
(def: (localized transform)
(-> (-> State State)
(-> Synthesizer Synthesizer))
(function (_ synthesize)
(function (_ analysis)
(localized' transform (synthesize analysis)))))
(do-template [<operation> <synthesizer> <value>]
[(def: #export <operation>
(All [a] (-> (Operation a) (Operation a)))
(localized' (set@ #direct? <value>)))
(def: #export <synthesizer>
(-> Synthesizer Synthesizer)
(localized (set@ #direct? <value>)))]
[indirectly' indirectly false]
[directly' directly true]
)
(do-template [<operation> <synthesizer> <type> <tag>]
[(def: #export (<operation> value)
(-> <type> (All [a] (-> (Operation a) (Operation a))))
(localized' (set@ <tag> value)))
(def: #export (<synthesizer> value)
(-> <type> (-> Synthesizer Synthesizer))
(localized (set@ <tag> value)))]
[with-scope-arity' with-scope-arity Arity #scope-arity]
[with-resolver' with-resolver Resolver #resolver]
[with-locals' with-locals Nat #locals]
)
(def: #export (with-state value)
(-> ..State (-> Synthesizer Synthesizer))
(localized (function.constant value)))
(def: #export (with-abstraction-state arity resolver)
(-> Arity Resolver (-> Synthesizer Synthesizer))
(with-state {#scope-arity arity
#resolver resolver
#direct? true
#locals arity}))
(do-template [<name> <tag> <type>]
[(def: #export <name>
(Operation <type>)
(function (_ state)
(#error.Success [state (get@ <tag> state)])))]
[scope-arity #scope-arity Arity]
[resolver #resolver Resolver]
[direct? #direct? Bool]
[locals #locals Nat]
)
(def: #export Operation@Monad (state.Monad<State'> error.Monad<Error>))
(def: #export with-new-local'
(All [a] (-> (Operation a) (Operation a)))
(<<| (do Operation@Monad
[locals ..locals])
(..with-locals' (inc locals))))
(do-template [<name> <tag>]
[(template: #export (<name> content)
(<| #..Reference
<tag>
content))]
[variable/local //reference.local]
[variable/foreign //reference.foreign]
)
(do-template [<name> <family> <tag>]
[(template: #export (<name> content)
(<| #..Control
<family>
<tag>
content))]
[branch/case #..Branch #..Case]
[branch/let #..Branch #..Let]
[branch/if #..Branch #..If]
[branch/exec #..Branch #..Exec]
[loop/scope #..Loop #..Scope]
[loop/recur #..Loop #..Recur]
[function/abstraction #..Function #..Abstraction]
[function/apply #..Function #..Apply]
)
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