202 lines
16 KiB
Agda
202 lines
16 KiB
Agda
{-# OPTIONS --rewriting #-}
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module Luau.Syntax.FromJSON where
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open import Luau.Syntax using (Block; Stat ; Expr; _$_; val; nil; bool; number; var; var_∈_; function_is_end; _⟨_⟩; _⟨_⟩∈_; local_←_; return; done; _∙_; maybe; VarDec; binexp; BinaryOperator; +; -; *; /; ==; ~=; <; >; <=; >=; ··; string)
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open import Luau.Type.FromJSON using (typeFromJSON)
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open import Agda.Builtin.List using (List; _∷_; [])
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open import Agda.Builtin.Bool using (true; false)
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open import FFI.Data.Aeson using (Value; Array; Object; object; array; string; fromString; lookup)
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open import FFI.Data.Either using (Either; Left; Right)
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open import FFI.Data.Maybe using (Maybe; nothing; just)
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open import FFI.Data.Scientific using (toFloat)
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open import FFI.Data.String using (String; _++_)
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open import FFI.Data.Vector using (head; tail; null; empty)
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args = fromString "args"
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body = fromString "body"
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func = fromString "func"
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lokal = fromString "local"
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list = fromString "list"
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name = fromString "name"
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type = fromString "type"
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value = fromString "value"
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values = fromString "values"
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vars = fromString "vars"
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op = fromString "op"
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left = fromString "left"
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right = fromString "right"
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returnAnnotation = fromString "returnAnnotation"
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types = fromString "types"
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data Lookup : Set where
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_,_ : String → Value → Lookup
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nil : Lookup
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lookupIn : List String → Object → Lookup
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lookupIn [] obj = nil
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lookupIn (key ∷ keys) obj with lookup (fromString key) obj
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lookupIn (key ∷ keys) obj | nothing = lookupIn keys obj
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lookupIn (key ∷ keys) obj | just value = (key , value)
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binOpFromJSON : Value → Either String BinaryOperator
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binOpFromString : String → Either String BinaryOperator
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varDecFromJSON : Value → Either String (VarDec maybe)
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varDecFromObject : Object → Either String (VarDec maybe)
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exprFromJSON : Value → Either String (Expr maybe)
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exprFromObject : Object → Either String (Expr maybe)
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statFromJSON : Value → Either String (Stat maybe)
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statFromObject : Object → Either String (Stat maybe)
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blockFromJSON : Value → Either String (Block maybe)
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blockFromArray : Array → Either String (Block maybe)
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binOpFromJSON (string s) = binOpFromString s
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binOpFromJSON _ = Left "Binary operator not a string"
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binOpFromString "Add" = Right +
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binOpFromString "Sub" = Right -
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binOpFromString "Mul" = Right *
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binOpFromString "Div" = Right /
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binOpFromString "CompareEq" = Right ==
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binOpFromString "CompareNe" = Right ~=
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binOpFromString "CompareLt" = Right <
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binOpFromString "CompareLe" = Right <=
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binOpFromString "CompareGt" = Right >
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binOpFromString "CompareGe" = Right >=
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binOpFromString "Concat" = Right ··
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binOpFromString s = Left ("'" ++ s ++ "' is not a valid operator")
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varDecFromJSON (object arg) = varDecFromObject arg
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varDecFromJSON _ = Left "VarDec not an object"
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varDecFromObject obj with lookup name obj | lookup type obj
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varDecFromObject obj | just (string name) | nothing = Right (var name)
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varDecFromObject obj | just (string name) | just Value.null = Right (var name)
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varDecFromObject obj | just (string name) | just tyValue with typeFromJSON tyValue
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varDecFromObject obj | just (string name) | just tyValue | Right ty = Right (var name ∈ ty)
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varDecFromObject obj | just (string name) | just tyValue | Left err = Left err
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varDecFromObject obj | just _ | _ = Left "AstLocal name is not a string"
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varDecFromObject obj | nothing | _ = Left "AstLocal missing name"
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exprFromJSON (object obj) = exprFromObject obj
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exprFromJSON _ = Left "AstExpr not an object"
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exprFromObject obj with lookup type obj
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exprFromObject obj | just (string "AstExprCall") with lookup func obj | lookup args obj
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exprFromObject obj | just (string "AstExprCall") | just value | just (array arr) with head arr
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exprFromObject obj | just (string "AstExprCall") | just value | just (array arr) | just value2 with exprFromJSON value | exprFromJSON value2
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exprFromObject obj | just (string "AstExprCall") | just value | just (array arr) | just value2 | Right fun | Right arg = Right (fun $ arg)
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exprFromObject obj | just (string "AstExprCall") | just value | just (array arr) | just value2 | Left err | _ = Left err
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exprFromObject obj | just (string "AstExprCall") | just value | just (array arr) | just value2 | _ | Left err = Left err
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exprFromObject obj | just (string "AstExprCall") | just value | just (array arr) | nothing = Left ("AstExprCall empty args")
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exprFromObject obj | just (string "AstExprCall") | just value | just _ = Left ("AstExprCall args not an array")
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exprFromObject obj | just (string "AstExprCall") | nothing | _ = Left ("AstExprCall missing func")
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exprFromObject obj | just (string "AstExprCall") | _ | nothing = Left ("AstExprCall missing args")
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exprFromObject obj | just (string "AstExprConstantNil") = Right (val nil)
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exprFromObject obj | just (string "AstExprFunction") with lookup args obj | lookup body obj | lookup returnAnnotation obj
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | rtn with head arr | blockFromJSON blockValue
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | rtn | just argValue | Right B with varDecFromJSON argValue
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | just (object rtnObj) | just argValue | Right B | Right arg with lookup types rtnObj
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | just (object rtnObj) | just argValue | Right B | Right arg | just (array rtnTypes) with head rtnTypes
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | just (object rtnObj) | just argValue | Right B | Right arg | just (array rtnTypes) | just rtnType with typeFromJSON rtnType
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | just (object rtnObj) | just argValue | Right B | Right arg | just (array rtnTypes) | just rtnType | Left err = Left err
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | just (object rtnObj) | just argValue | Right B | Right arg | just (array rtnTypes) | just rtnType | Right T = Right (function "" ⟨ arg ⟩∈ T is B end)
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | just (object rtnObj) | just argValue | Right B | Right arg | just (array rtnTypes) | nothing = Right (function "" ⟨ arg ⟩ is B end)
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | just (object rtnObj) | just argValue | Right B | Right arg | just _ = Left "returnAnnotation types not an array"
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | just (object rtnObj) | just argValue | Right B | Right arg | nothing = Left "returnAnnotation missing types"
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | just _ | just argValue | Right B | Right arg = Left "returnAnnotation not an object"
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | nothing | just argValue | Right B | Right arg = Right (function "" ⟨ arg ⟩ is B end)
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | rtn | just argValue | Right B | Left err = Left err
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | rtn | nothing | Right B = Left "Unsupported AstExprFunction empty args"
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exprFromObject obj | just (string "AstExprFunction") | just (array arr) | just blockValue | rtn | _ | Left err = Left err
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exprFromObject obj | just (string "AstExprFunction") | just _ | just _ | rtn = Left "AstExprFunction args not an array"
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exprFromObject obj | just (string "AstExprFunction") | nothing | _ | rtn = Left "AstExprFunction missing args"
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exprFromObject obj | just (string "AstExprFunction") | _ | nothing | rtn = Left "AstExprFunction missing body"
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exprFromObject obj | just (string "AstExprLocal") with lookup lokal obj
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exprFromObject obj | just (string "AstExprLocal") | just x with varDecFromJSON x
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exprFromObject obj | just (string "AstExprLocal") | just x | Right x′ = Right (var (Luau.Syntax.name x′))
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exprFromObject obj | just (string "AstExprLocal") | just x | Left err = Left err
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exprFromObject obj | just (string "AstExprLocal") | nothing = Left "AstExprLocal missing local"
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exprFromObject obj | just (string "AstExprConstantNumber") with lookup value obj
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exprFromObject obj | just (string "AstExprConstantNumber") | just (FFI.Data.Aeson.Value.number x) = Right (val (number (toFloat x)))
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exprFromObject obj | just (string "AstExprConstantNumber") | just _ = Left "AstExprConstantNumber value is not a number"
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exprFromObject obj | just (string "AstExprConstantNumber") | nothing = Left "AstExprConstantNumber missing value"
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exprFromObject obj | just (string "AstExprConstantString") with lookup value obj
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exprFromObject obj | just (string "AstExprConstantString") | just (string x) = Right (val (string x))
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exprFromObject obj | just (string "AstExprConstantString") | just _ = Left "AstExprConstantString value is not a string"
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exprFromObject obj | just (string "AstExprConstantString") | nothing = Left "AstExprConstantString missing value"
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exprFromObject obj | just (string "AstExprConstantBool") with lookup value obj
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exprFromObject obj | just (string "AstExprConstantBool") | just (FFI.Data.Aeson.Value.bool b) = Right (val (bool b))
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exprFromObject obj | just (string "AstExprConstantBool") | just _ = Left "AstExprConstantBool value is not a bool"
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exprFromObject obj | just (string "AstExprConstantBool") | nothing = Left "AstExprConstantBool missing value"
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exprFromObject obj | just (string "AstExprBinary") with lookup op obj | lookup left obj | lookup right obj
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exprFromObject obj | just (string "AstExprBinary") | just o | just l | just r with binOpFromJSON o | exprFromJSON l | exprFromJSON r
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exprFromObject obj | just (string "AstExprBinary") | just o | just l | just r | Right o′ | Right l′ | Right r′ = Right (binexp l′ o′ r′)
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exprFromObject obj | just (string "AstExprBinary") | just o | just l | just r | Left err | _ | _ = Left err
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exprFromObject obj | just (string "AstExprBinary") | just o | just l | just r | _ | Left err | _ = Left err
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exprFromObject obj | just (string "AstExprBinary") | just o | just l | just r | _ | _ | Left err = Left err
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exprFromObject obj | just (string "AstExprBinary") | nothing | _ | _ = Left "Missing 'op' in AstExprBinary"
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exprFromObject obj | just (string "AstExprBinary") | _ | nothing | _ = Left "Missing 'left' in AstExprBinary"
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exprFromObject obj | just (string "AstExprBinary") | _ | _ | nothing = Left "Missing 'right' in AstExprBinary"
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exprFromObject obj | just (string ty) = Left ("TODO: Unsupported AstExpr " ++ ty)
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exprFromObject obj | just _ = Left "AstExpr type not a string"
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exprFromObject obj | nothing = Left "AstExpr missing type"
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{-# NON_TERMINATING #-}
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statFromJSON (object obj) = statFromObject obj
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statFromJSON _ = Left "AstStat not an object"
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statFromObject obj with lookup type obj
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statFromObject obj | just(string "AstStatLocal") with lookup vars obj | lookup values obj
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statFromObject obj | just(string "AstStatLocal") | just(array arr1) | just(array arr2) with head(arr1) | head(arr2)
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statFromObject obj | just(string "AstStatLocal") | just(array arr1) | just(array arr2) | just(x) | just(value) with varDecFromJSON(x) | exprFromJSON(value)
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statFromObject obj | just(string "AstStatLocal") | just(array arr1) | just(array arr2) | just(x) | just(value) | Right x′ | Right M = Right (local x′ ← M)
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statFromObject obj | just(string "AstStatLocal") | just(array arr1) | just(array arr2) | just(x) | just(value) | Left err | _ = Left err
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statFromObject obj | just(string "AstStatLocal") | just(array arr1) | just(array arr2) | just(x) | just(value) | _ | Left err = Left err
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statFromObject obj | just(string "AstStatLocal") | just(array arr1) | just(array arr2) | just(x) | nothing = Left "AstStatLocal empty values"
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statFromObject obj | just(string "AstStatLocal") | just(array arr1) | just(array arr2) | nothing | _ = Left "AstStatLocal empty vars"
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statFromObject obj | just(string "AstStatLocal") | just(array arr1) | just(_) = Left "AstStatLocal values not an array"
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statFromObject obj | just(string "AstStatLocal") | just(_) | just(_) = Left "AstStatLocal vars not an array"
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statFromObject obj | just(string "AstStatLocal") | just(_) | nothing = Left "AstStatLocal missing values"
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statFromObject obj | just(string "AstStatLocal") | nothing | _ = Left "AstStatLocal missing vars"
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statFromObject obj | just(string "AstStatLocalFunction") with lookup name obj | lookup func obj
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statFromObject obj | just(string "AstStatLocalFunction") | just fnName | just value with varDecFromJSON fnName | exprFromJSON value
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statFromObject obj | just(string "AstStatLocalFunction") | just fnName | just value | Right fnVar | Right (function "" ⟨ x ⟩ is B end) = Right (function (Luau.Syntax.name fnVar) ⟨ x ⟩ is B end)
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statFromObject obj | just(string "AstStatLocalFunction") | just fnName | just value | Right fnVar | Right (function "" ⟨ x ⟩∈ T is B end) = Right (function (Luau.Syntax.name fnVar) ⟨ x ⟩∈ T is B end)
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statFromObject obj | just(string "AstStatLocalFunction") | just fnName | just value | Left err | _ = Left err
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statFromObject obj | just(string "AstStatLocalFunction") | just fnName | just value | _ | Left err = Left err
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statFromObject obj | just(string "AstStatLocalFunction") | just _ | just _ | Right _ | Right _ = Left "AstStatLocalFunction func is not an AstExprFunction"
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statFromObject obj | just(string "AstStatLocalFunction") | nothing | _ = Left "AstStatFunction missing name"
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statFromObject obj | just(string "AstStatLocalFunction") | _ | nothing = Left "AstStatFunction missing func"
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statFromObject obj | just(string "AstStatReturn") with lookup list obj
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statFromObject obj | just(string "AstStatReturn") | just(array arr) with head arr
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statFromObject obj | just(string "AstStatReturn") | just(array arr) | just value with exprFromJSON value
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statFromObject obj | just(string "AstStatReturn") | just(array arr) | just value | Right M = Right (return M)
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statFromObject obj | just(string "AstStatReturn") | just(array arr) | just value | Left err = Left err
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statFromObject obj | just(string "AstStatReturn") | just(array arr) | nothing = Left "AstStatReturn empty list"
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statFromObject obj | just(string "AstStatReturn") | just(_) = Left "AstStatReturn list not an array"
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statFromObject obj | just(string "AstStatReturn") | nothing = Left "AstStatReturn missing list"
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statFromObject obj | just (string ty) = Left ("TODO: Unsupported AstStat " ++ ty)
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statFromObject obj | just _ = Left "AstStat type not a string"
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statFromObject obj | nothing = Left "AstStat missing type"
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blockFromJSON (array arr) = blockFromArray arr
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blockFromJSON (object obj) with lookup type obj | lookup body obj
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blockFromJSON (object obj) | just (string "AstStatBlock") | just value = blockFromJSON value
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blockFromJSON (object obj) | just (string "AstStatBlock") | nothing = Left "AstStatBlock missing body"
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blockFromJSON (object obj) | just (string ty) | _ = Left ("Unsupported AstBlock " ++ ty)
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blockFromJSON (object obj) | just _ | _ = Left "AstStatBlock type not a string"
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blockFromJSON (object obj) | nothing | _ = Left "AstStatBlock missing type"
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blockFromJSON _ = Left "AstBlock not an array or AstStatBlock object"
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blockFromArray arr with head arr
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blockFromArray arr | nothing = Right done
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blockFromArray arr | just value with statFromJSON value
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blockFromArray arr | just value | Left err = Left err
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blockFromArray arr | just value | Right S with blockFromArray(tail arr)
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blockFromArray arr | just value | Right S | Left err = Left (err)
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blockFromArray arr | just value | Right S | Right B = Right (S ∙ B)
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