structure Lean.Elab.Command.Scope : Type

• header : String
• opts : Lean.Options
• currNamespace : Lake.Name
• openDecls : List Lean.OpenDecl
• levelNames : List Lake.Name
• varDecls : Array (Lean.TSyntax `Lean.Parser.Term.bracketedBinder)

  section variables

• varUIds : Array Lake.Name

  Globally unique internal identifiers for the varDecls

• isNoncomputable : Bool

  noncomputable sections automatically add the noncomputable modifier to any declaration we cannot generate code for.

instance Lean.Elab.Command.instInhabitedScope : Inhabited Lean.Elab.Command.Scope

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structure Lean.Elab.Command.State : Type

• env : Lean.Environment
• messages : Lean.MessageLog
• scopes : List Lean.Elab.Command.Scope
• nextMacroScope : Nat
• maxRecDepth : Nat
• ngen : Lean.NameGenerator
• infoState : Lean.Elab.InfoState
• traceState : Lean.TraceState

instance Lean.Elab.Command.instNonemptyState : Nonempty Lean.Elab.Command.State

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• Lean.Elab.Command.instNonemptyState = ⋯

structure Lean.Elab.Command.Context : Type

• fileName : String
• fileMap : Lean.FileMap
• currRecDepth : Nat
• cmdPos : String.Pos
• macroStack : Lean.Elab.MacroStack
• currMacroScope : Lean.MacroScope
• ref : Lean.Syntax
• tacticCache? : Option (IO.Ref Lean.Elab.Tactic.Cache)
• snap? : Option (Lean.Language.SnapshotBundle Lean.Language.DynamicSnapshot)

  Snapshot for incremental reuse and reporting of command elaboration. Currently unused in Lean itself.

  Definitely resolved in Language.Lean.process.doElab.

  Invariant: if the bundle's old? is set, the context and state at the beginning of current and old elaboration are identical.

@[reducible, inline]

abbrev Lean.Elab.Command.CommandElabCoreM (ε : Type) (α : Type) : Type

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• Lean.Elab.Command.CommandElabCoreM ε = ReaderT Lean.Elab.Command.Context (StateRefT' IO.RealWorld Lean.Elab.Command.State (EIO ε))

@[reducible, inline]

abbrev Lean.Elab.Command.CommandElabM (α : Type) : Type

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• Lean.Elab.Command.CommandElabM = Lean.Elab.Command.CommandElabCoreM Lean.Exception

@[reducible, inline]

abbrev Lean.Elab.Command.CommandElab : Type

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• Lean.Elab.Command.CommandElab = (Lean.Syntax → Lean.Elab.Command.CommandElabM Unit)

structure Lean.Elab.Command.Linter : Type

• run : Lean.Syntax → Lean.Elab.Command.CommandElabM Unit
• name : Lake.Name

@[always_inline]

instance Lean.Elab.Command.instMonadCommandElabM : Monad Lean.Elab.Command.CommandElabM

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• Lean.Elab.Command.instMonadCommandElabM = let i := inferInstanceAs (Monad Lean.Elab.Command.CommandElabM); Monad.mk

def Lean.Elab.Command.mkState (env : Lean.Environment) (messages : optParam Lean.MessageLog { msgs := { root := Lean.PersistentArrayNode.node (Array.mkEmpty Lean.PersistentArray.branching.toNat), tail := Array.mkEmpty Lean.PersistentArray.branching.toNat, size := 0, shift := Lean.PersistentArray.initShift, tailOff := 0 } }) (opts : optParam Lean.Options { entries := [] }) : Lean.Elab.Command.State

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opaque Lean.Elab.Command.lintersRef : IO.Ref (Array Lean.Linter)

def Lean.Elab.Command.addLinter (l : Lean.Linter) : IO Unit

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• Lean.addLinter l = do let ls ← ST.Ref.get Lean.Elab.Command.lintersRef ST.Ref.set Lean.Elab.Command.lintersRef (ls.push l)

instance Lean.Elab.Command.instMonadInfoTreeCommandElabM : Lean.Elab.MonadInfoTree Lean.Elab.Command.CommandElabM

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instance Lean.Elab.Command.instMonadEnvCommandElabM : Lean.MonadEnv Lean.Elab.Command.CommandElabM

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@[always_inline]

instance Lean.Elab.Command.instMonadOptionsCommandElabM : Lean.MonadOptions Lean.Elab.Command.CommandElabM

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• Lean.Elab.Command.instMonadOptionsCommandElabM = { getOptions := do let __do_lift ← get pure __do_lift.scopes.head!.opts }

def Lean.Elab.Command.getRef : Lean.Elab.Command.CommandElabM Lean.Syntax

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• Lean.Elab.Command.getRef = do let __do_lift ← read pure __do_lift.ref

instance Lean.Elab.Command.instAddMessageContextCommandElabM : Lean.AddMessageContext Lean.Elab.Command.CommandElabM

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• Lean.Elab.Command.instAddMessageContextCommandElabM = { addMessageContext := Lean.addMessageContextPartial }

instance Lean.Elab.Command.instMonadRefCommandElabM : Lean.MonadRef Lean.Elab.Command.CommandElabM

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instance Lean.Elab.Command.instMonadTraceCommandElabM : Lean.MonadTrace Lean.Elab.Command.CommandElabM

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instance Lean.Elab.Command.instAddErrorMessageContextCommandElabM : Lean.AddErrorMessageContext Lean.Elab.Command.CommandElabM

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def Lean.Elab.Command.mkMessageAux (ctx : Lean.Elab.Command.Context) (ref : Lean.Syntax) (msgData : Lean.MessageData) (severity : Lean.MessageSeverity) : Lean.Message

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def Lean.Elab.Command.liftCoreM {α : Type} (x : Lean.CoreM α) : Lean.Elab.Command.CommandElabM α

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@[inline]

def Lean.Elab.Command.liftEIO {α : Type} (x : EIO Lean.Exception α) : Lean.Elab.Command.CommandElabM α

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• Lean.Elab.Command.liftEIO x = liftM x

@[inline]

def Lean.Elab.Command.liftIO {α : Type} (x : IO α) : Lean.Elab.Command.CommandElabM α

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• Lean.Elab.Command.liftIO x = do let ctx ← read liftM (IO.toEIO (fun (ex : IO.Error) => Lean.Exception.error ctx.ref ((Lean.MessageData.ofFormat ∘ Std.format) ex.toString)) x)

instance Lean.Elab.Command.instMonadLiftTIOCommandElabM : MonadLiftT IO Lean.Elab.Command.CommandElabM

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• Lean.Elab.Command.instMonadLiftTIOCommandElabM = { monadLift := fun {α : Type} => Lean.Elab.Command.liftIO }

def Lean.Elab.Command.getScope : Lean.Elab.Command.CommandElabM Lean.Elab.Command.Scope

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• Lean.Elab.Command.getScope = do let __do_lift ← get pure __do_lift.scopes.head!

instance Lean.Elab.Command.instMonadResolveNameCommandElabM : Lean.MonadResolveName Lean.Elab.Command.CommandElabM

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instance Lean.Elab.Command.instMonadLogCommandElabM : Lean.MonadLog Lean.Elab.Command.CommandElabM

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def Lean.Elab.Command.runLinters (stx : Lean.Syntax) : Lean.Elab.Command.CommandElabM Unit

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def Lean.Elab.Command.getCurrMacroScope : Lean.Elab.Command.CommandElabM Nat

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• Lean.Elab.Command.getCurrMacroScope = do let __do_lift ← read pure __do_lift.currMacroScope

def Lean.Elab.Command.getMainModule : Lean.Elab.Command.CommandElabM Lake.Name

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• Lean.Elab.Command.getMainModule = do let __do_lift ← Lean.getEnv pure __do_lift.mainModule

def Lean.Elab.Command.withFreshMacroScope {α : Type} (x : Lean.Elab.Command.CommandElabM α) : Lean.Elab.Command.CommandElabM α

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instance Lean.Elab.Command.instMonadQuotationCommandElabM : Lean.MonadQuotation Lean.Elab.Command.CommandElabM

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unsafe def Lean.Elab.Command.mkCommandElabAttributeUnsafe (ref : Lake.Name) : IO (Lean.KeyedDeclsAttribute Lean.Elab.Command.CommandElab)

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@[implemented_by Lean.Elab.Command.mkCommandElabAttributeUnsafe]

opaque Lean.Elab.Command.mkCommandElabAttribute (ref : Lake.Name) : IO (Lean.KeyedDeclsAttribute Lean.Elab.Command.CommandElab)

opaque Lean.Elab.Command.commandElabAttribute : Lean.KeyedDeclsAttribute Lean.Elab.Command.CommandElab

def Lean.Elab.Command.withMacroExpansion {α : Type} (beforeStx : Lean.Syntax) (afterStx : Lean.Syntax) (x : Lean.Elab.Command.CommandElabM α) : Lean.Elab.Command.CommandElabM α

Elaborate x with stx on the macro stack

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instance Lean.Elab.Command.instMonadMacroAdapterCommandElabM : Lean.Elab.MonadMacroAdapter Lean.Elab.Command.CommandElabM

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instance Lean.Elab.Command.instMonadRecDepthCommandElabM : Lean.MonadRecDepth Lean.Elab.Command.CommandElabM

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partial def Lean.Elab.Command.elabCommand (stx : Lean.Syntax) : Lean.Elab.Command.CommandElabM Unit

def Lean.Elab.Command.elabCommandTopLevel (stx : Lean.Syntax) : Lean.Elab.Command.CommandElabM Unit

elabCommand wrapper that should be used for the initial invocation, not for recursive calls after macro expansion etc.

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def Lean.Elab.Command.adaptExpander (exp : Lean.Syntax → Lean.Elab.Command.CommandElabM Lean.Syntax) : Lean.Elab.Command.CommandElab

Adapt a syntax transformation to a regular, command-producing elaborator.

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• Lean.Elab.Command.adaptExpander exp stx = do let stx' ← exp stx Lean.Elab.Command.withMacroExpansion stx stx' (Lean.Elab.Command.elabCommand stx')

instance Lean.Elab.Command.instInhabitedCommandElabM {α : Type} : Inhabited (Lean.Elab.Command.CommandElabM α)

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• Lean.Elab.Command.instInhabitedCommandElabM = { default := throw default }

def Lean.Elab.Command.getBracketedBinderIds : Lean.Syntax → Array Lake.Name

Return identifier names in the given bracketed binder.

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def Lean.Elab.Command.liftTermElabM {α : Type} (x : Lean.Elab.TermElabM α) : Lean.Elab.Command.CommandElabM α

Lift the TermElabM monadic action x into a CommandElabM monadic action.

Note that x is executed with an empty message log. Thus, x cannot modify/view messages produced by previous commands.

If you need to access the free variables corresponding to the ones declared using the variable command, consider using runTermElabM.

Recall that TermElabM actions can automatically lift MetaM and CoreM actions. Example:

import Lean

open Lean Elab Command Meta

def printExpr (e : Expr) : MetaM Unit := do
  IO.println s!"{← ppExpr e} : {← ppExpr (← inferType e)}"

#eval
  liftTermElabM do
    printExpr (mkConst ``Nat)

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def Lean.Elab.Command.runTermElabM {α : Type} (elabFn : Array Lean.Expr → Lean.Elab.TermElabM α) : Lean.Elab.Command.CommandElabM α

Execute the monadic action elabFn xs as a CommandElabM monadic action, where xs are free variables corresponding to all active scoped variables declared using the variable command.

This method is similar to liftTermElabM, but it elaborates all scoped variables declared using the variable command.

Example:

import Lean

open Lean Elab Command Meta

variable {α : Type u} {f : α → α}
variable (n : Nat)

#eval
  runTermElabM fun xs => do
    for x in xs do
      IO.println s!"{← ppExpr x} : {← ppExpr (← inferType x)}"

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@[inline]

def Lean.Elab.Command.catchExceptions (x : Lean.Elab.Command.CommandElabM Unit) : Lean.Elab.Command.CommandElabCoreM Empty Unit

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• Lean.Elab.Command.catchExceptions x ctx ref = (Lean.Elab.withLogging x ctx ref).catchExceptions fun (x : Lean.Exception) => pure ()

def Lean.Elab.Command.getScopes : Lean.Elab.Command.CommandElabM (List Lean.Elab.Command.Scope)

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• Lean.Elab.Command.getScopes = do let __do_lift ← get pure __do_lift.scopes

def Lean.Elab.Command.modifyScope (f : Lean.Elab.Command.Scope → Lean.Elab.Command.Scope) : Lean.Elab.Command.CommandElabM Unit

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def Lean.Elab.Command.withScope {α : Type} (f : Lean.Elab.Command.Scope → Lean.Elab.Command.Scope) (x : Lean.Elab.Command.CommandElabM α) : Lean.Elab.Command.CommandElabM α

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def Lean.Elab.Command.getLevelNames : Lean.Elab.Command.CommandElabM (List Lake.Name)

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• Lean.Elab.Command.getLevelNames = do let __do_lift ← Lean.Elab.Command.getScope pure __do_lift.levelNames

def Lean.Elab.Command.addUnivLevel (idStx : Lean.Syntax) : Lean.Elab.Command.CommandElabM Unit

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def Lean.Elab.Command.expandDeclId (declId : Lean.Syntax) (modifiers : Lean.Elab.Modifiers) : Lean.Elab.Command.CommandElabM Lean.Elab.ExpandDeclIdResult

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def Lean.liftCommandElabM {α : Type} (cmd : Lean.Elab.Command.CommandElabM α) : Lean.CoreM α

Lifts an action in CommandElabM into CoreM, updating the traces and the environment.

Commands that modify the processing of subsequent commands, such as open and namespace commands, only have an effect for the remainder of the CommandElabM computation passed here, and do not affect subsequent commands.

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partial def Lean.withSetOptionIn (cmd : Lean.Elab.Command.CommandElab) : Lean.Elab.Command.CommandElab

Given a command elaborator cmd, returns a new command elaborator that first evaluates any local set_option ... in ... clauses and then invokes cmd on what remains.