Documentation

Init.Data.Repr

class Repr (α : Type u) :

A typeclass that specifies the standard way of turning values of some type into Format.

When rendered this Format should be as close as possible to something that can be parsed as the input value.

  • reprPrec : αNatStd.Format

    Turn a value of type α into Format at a given precedence. The precedence value can be used to avoid parentheses if they are not necessary.

Instances
    @[reducible, inline]
    abbrev repr {α : Type u_1} [Repr α] (a : α) :

    Turn a into Format using its Repr instance. The precedence level is initially set to 0.

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      @[reducible, inline]
      abbrev reprStr {α : Type u_1} [Repr α] (a : α) :
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        @[reducible, inline]
        abbrev reprArg {α : Type u_1} [Repr α] (a : α) :
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          class ReprAtom (α : Type u) :

          Auxiliary class for marking types that should be considered atomic by Repr methods. We use it at Repr (List α) to decide whether bracketFill should be used or not.

            Instances
              instance instReprId {α : Type u_1} [Repr α] :
              Repr (id α)
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              instance instReprId_1 {α : Type u_1} [Repr α] :
              Repr (Id α)
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                instance instReprDecidable {p : Prop} :
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                • One or more equations did not get rendered due to their size.
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                instance instReprULift {α : Type u_1} [Repr α] :
                Repr (ULift α)
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                def Option.repr {α : Type u_1} [Repr α] :
                Option αNatStd.Format
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                  instance instReprOption {α : Type u_1} [Repr α] :
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                  • instReprOption = { reprPrec := Option.repr }
                  def Sum.repr {α : Type u_1} {β : Type u_2} [Repr α] [Repr β] :
                  α βNatStd.Format
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                    instance instReprSum {α : Type u_1} {β : Type u_2} [Repr α] [Repr β] :
                    Repr (α β)
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                    • instReprSum = { reprPrec := Sum.repr }
                    class ReprTuple (α : Type u) :
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                      instance instReprTupleOfRepr {α : Type u_1} [Repr α] :
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                      instance instReprTupleProdOfRepr {α : Type u_1} {β : Type u_2} [Repr α] [ReprTuple β] :
                      ReprTuple (α × β)
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                      def Prod.repr {α : Type u_1} {β : Type u_2} [Repr α] [ReprTuple β] :
                      α × βNatStd.Format
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                        instance instReprProdOfReprTuple {α : Type u_1} {β : Type u_2} [Repr α] [ReprTuple β] :
                        Repr (α × β)
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                        • instReprProdOfReprTuple = { reprPrec := Prod.repr }
                        instance instReprSigma {α : Type u_1} {β : αType v} [Repr α] [(x : α) → Repr (β x)] :
                        Repr (Sigma β)
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                        instance instReprSubtype {α : Type u_1} {p : αProp} [Repr α] :
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                          def Nat.toDigitsCore (base : Nat) :
                          NatNatList CharList Char
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                          • base.toDigitsCore 0 x✝ x = x
                          • base.toDigitsCore fuel.succ x✝ x = if x✝ / base = 0 then (x✝ % base).digitChar :: x else base.toDigitsCore fuel (x✝ / base) ((x✝ % base).digitChar :: x)
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                            def Nat.toDigits (base n : Nat) :
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                            • base.toDigits n = base.toDigitsCore (n + 1) n []
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                              @[extern lean_string_of_usize]
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                                @[implemented_by _private.Init.Data.Repr.0.Nat.reprFast]
                                def Nat.repr (n : Nat) :
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                                    • n.toSuperDigits = n.toSuperDigitsAux []
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                                      • n.toSuperscriptString = n.toSuperDigits.asString
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                                          • n.toSubDigits = n.toSubDigitsAux []
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                                            • n.toSubscriptString = n.toSubDigits.asString
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                                              instance instReprNat :
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                                                instance instReprInt :
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                                                      • c.quote = "'" ++ c.quoteCore ++ "'"
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                                                        def Char.repr (c : Char) :
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                                                        • c.repr = c.quote
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                                                            instance instReprFin (n : Nat) :
                                                            Repr (Fin n)
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                                                            def List.repr {α : Type u_1} [Repr α] (a : List α) (n : Nat) :
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                                                              instance instReprList {α : Type u_1} [Repr α] :
                                                              Repr (List α)
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                                                              • instReprList = { reprPrec := List.repr }
                                                              def List.repr' {α : Type u_1} [Repr α] [ReprAtom α] (a : List α) (n : Nat) :
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                                                                instance instReprListOfReprAtom {α : Type u_1} [Repr α] [ReprAtom α] :
                                                                Repr (List α)
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                                                                • instReprListOfReprAtom = { reprPrec := List.repr' }