Documentation

Lean.Data.Json.FromToJson

class Lean.FromJson (α : Type u) :

fromJson? : Lean.Json → Except String α

Instances

class Lean.ToJson (α : Type u) :

toJson : α → Lean.Json

Instances

instance Lean.instFromJsonJson :

Lean.FromJson Lean.Json

Equations

Lean.instFromJsonJson = { fromJson? := Except.ok }

instance Lean.instToJsonJson :

Lean.ToJson Lean.Json

Equations

Lean.instToJsonJson = { toJson := id }

instance Lean.instFromJsonJsonNumber :

Lean.FromJson Lean.JsonNumber

Equations

Lean.instFromJsonJsonNumber = { fromJson? := Lean.Json.getNum? }

instance Lean.instToJsonJsonNumber :

Lean.ToJson Lean.JsonNumber

Equations

Lean.instToJsonJsonNumber = { toJson := Lean.Json.num }

instance Lean.instFromJsonBool :

Lean.FromJson Bool

Equations

Lean.instFromJsonBool = { fromJson? := Lean.Json.getBool? }

instance Lean.instToJsonBool :

Lean.ToJson Bool

Equations

Lean.instToJsonBool = { toJson := fun (b : Bool) => Lean.Json.bool b }

instance Lean.instFromJsonNat :

Lean.FromJson Nat

Equations

Lean.instFromJsonNat = { fromJson? := Lean.Json.getNat? }

instance Lean.instToJsonNat :

Lean.ToJson Nat

Equations

Lean.instToJsonNat = { toJson := fun (n : Nat) => Lean.Json.num (Lean.JsonNumber.fromNat n) }

instance Lean.instFromJsonInt :

Lean.FromJson Int

Equations

Lean.instFromJsonInt = { fromJson? := Lean.Json.getInt? }

instance Lean.instToJsonInt :

Lean.ToJson Int

Equations

Lean.instToJsonInt = { toJson := fun (n : Int) => Lean.Json.num (Lean.JsonNumber.fromInt n) }

instance Lean.instFromJsonString :

Lean.FromJson String

Equations

Lean.instFromJsonString = { fromJson? := Lean.Json.getStr? }

instance Lean.instToJsonString :

Lean.ToJson String

Equations

Lean.instToJsonString = { toJson := fun (s : String) => Lean.Json.str s }

instance Lean.instFromJsonFilePath :

Lean.FromJson Lake.FilePath

Equations

Lean.instFromJsonFilePath = { fromJson? := fun (j : Lean.Json) => System.FilePath.mk <$> Lean.Json.getStr? j }

instance Lean.instToJsonFilePath :

Lean.ToJson Lake.FilePath

Equations

Lean.instToJsonFilePath = { toJson := fun (p : Lake.FilePath) => Lean.Json.str p.toString }

instance Lean.instFromJsonArray {α : Type u_1} [Lean.FromJson α] :

Lean.FromJson (Array α)

Equations

One or more equations did not get rendered due to their size.

instance Lean.instToJsonArray {α : Type u_1} [Lean.ToJson α] :

Lean.ToJson (Array α)

Equations

Lean.instToJsonArray = { toJson := fun (a : Array α) => Lean.Json.arr (Array.map Lean.toJson a) }

instance Lean.instFromJsonList {α : Type u_1} [Lean.FromJson α] :

Lean.FromJson (List α)

Equations

Lean.instFromJsonList = { fromJson? := fun (j : Lean.Json) => Except.map Array.toList (Lean.fromJson? j) }

instance Lean.instToJsonList {α : Type u_1} [Lean.ToJson α] :

Lean.ToJson (List α)

Equations

Lean.instToJsonList = { toJson := fun (xs : List α) => Lean.toJson (List.toArray xs) }

instance Lean.instFromJsonOption {α : Type u_1} [Lean.FromJson α] :

Lean.FromJson (Option α)

Equations

Lean.instFromJsonOption = { fromJson? := fun (x : Lean.Json) => match x with | Lean.Json.null => Except.ok none | j => some <$> Lean.fromJson? j }

instance Lean.instToJsonOption {α : Type u_1} [Lean.ToJson α] :

Lean.ToJson (Option α)

Equations

Lean.instToJsonOption = { toJson := fun (x : Option α) => match x with | none => Lean.Json.null | some a => Lean.toJson a }

instance Lean.instFromJsonProd {α : Type u} {β : Type v} [Lean.FromJson α] [Lean.FromJson β] :

Lean.FromJson (α × β)

Equations

One or more equations did not get rendered due to their size.

instance Lean.instToJsonProd {α : Type u_1} {β : Type u_2} [Lean.ToJson α] [Lean.ToJson β] :

Lean.ToJson (α × β)

Equations

Lean.instToJsonProd = { toJson := fun (x : α × β) => match x with | (a, b) => Lean.Json.arr #[Lean.toJson a, Lean.toJson b] }

instance Lean.instFromJsonName :

Lean.FromJson Lake.Name

Equations

One or more equations did not get rendered due to their size.

instance Lean.instToJsonName :

Lean.ToJson Lake.Name

Equations

Lean.instToJsonName = { toJson := fun (n : Lake.Name) => Lean.Json.str (toString n) }

def Lean.bignumFromJson? (j : Lean.Json) :

Except String Nat

Note that USizes and UInt64s are stored as strings because JavaScript cannot represent 64-bit numbers.

Equations

One or more equations did not get rendered due to their size.

def Lean.bignumToJson (n : Nat) :

Equations

Lean.bignumToJson n = Lean.Json.str (toString n)

instance Lean.instFromJsonUSize :

Lean.FromJson USize

Equations

One or more equations did not get rendered due to their size.

instance Lean.instToJsonUSize :

Lean.ToJson USize

Equations

Lean.instToJsonUSize = { toJson := fun (v : USize) => Lean.bignumToJson (USize.toNat v) }

instance Lean.instFromJsonUInt64 :

Lean.FromJson UInt64

Equations

One or more equations did not get rendered due to their size.

instance Lean.instToJsonUInt64 :

Lean.ToJson UInt64

Equations

Lean.instToJsonUInt64 = { toJson := fun (v : UInt64) => Lean.bignumToJson (UInt64.toNat v) }

instance Lean.instToJsonFloat :

Lean.ToJson Float

Equations

Lean.instToJsonFloat = { toJson := fun (x : Float) => match Lean.JsonNumber.fromFloat? x with | Sum.inl e => Lean.Json.str e | Sum.inr n => Lean.Json.num n }

instance Lean.instFromJsonFloat :

Lean.FromJson Float

Equations

One or more equations did not get rendered due to their size.

instance Lean.instToJsonRBMapString {α : Type} {cmp : String → String → Ordering} [Lean.ToJson α] :

Lean.ToJson (Lean.RBMap String α cmp)

Equations

Lean.instToJsonRBMapString = { toJson := fun (m : Lean.RBMap String α cmp) => Lean.Json.obj (Lean.RBNode.map (fun (x : String) => Lean.toJson) m.val) }

instance Lean.instFromJsonRBMapString {α : Type} {cmp : String → String → Ordering} [Lean.FromJson α] :

Lean.FromJson (Lean.RBMap String α cmp)

Equations

One or more equations did not get rendered due to their size.

instance Lean.Json.instFromJsonStructured :

Lean.FromJson Lean.Json.Structured

Equations

One or more equations did not get rendered due to their size.

instance Lean.Json.instToJsonStructured :

Lean.ToJson Lean.Json.Structured

Equations

One or more equations did not get rendered due to their size.

def Lean.Json.toStructured? {α : Type u_1} [Lean.ToJson α] (v : α) :

Except String Lean.Json.Structured

Equations

Lean.Json.toStructured? v = Lean.fromJson? (Lean.toJson v)

def Lean.Json.getObjValAs? (j : Lean.Json) (α : Type u) [Lean.FromJson α] (k : String) :

Except String α

Equations

Lean.Json.getObjValAs? j α k = Lean.fromJson? (Lean.Json.getObjValD j k)

def Lean.Json.setObjValAs! (j : Lean.Json) {α : Type u} [Lean.ToJson α] (k : String) (v : α) :

Equations

Lean.Json.setObjValAs! j k v = Lean.Json.setObjVal! j k (Lean.toJson v)

def Lean.Json.opt {α : Type u_1} [Lean.ToJson α] (k : String) :

Option α → List (String × Lean.Json)

Equations

Lean.Json.opt k x = match x with | none => [] | some o => [(k, Lean.toJson o)]

def Lean.Json.parseTagged (json : Lean.Json) (tag : String) (nFields : Nat) (fieldNames? : Option (Array Lake.Name)) :

Except String (Array Lean.Json)

Parses a JSON-encoded structure or inductive constructor. Used mostly by deriving FromJson.

Equations

One or more equations did not get rendered due to their size.