- header : String
- opts : Lean.Options
- currNamespace : Lake.Name
- openDecls : List Lean.OpenDecl
- varDecls : Array (Lean.TSyntax `Lean.Parser.Term.bracketedBinder)
section variables
Globally unique internal identifiers for the
varDecls
- isNoncomputable : Bool
noncomputable sections automatically add the
noncomputable
modifier to any declaration we cannot generate code for.
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- 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
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- 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)
Snapshot for incremental reuse and reporting of command elaboration. Currently only used for (mutual) defs and contained tactics, in which case the
DynamicSnapshot
is aHeadersParsedSnapshot
.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.- cancelTk? : Option IO.CancelToken
Cancellation token forwarded to
Core.cancelTk?
. - suppressElabErrors : Bool
If set (when
showPartialSyntaxErrors
is not set and parsing failed), suppresses most elaboration errors; see alsologMessage
below.
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- name : Lake.Name
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- Lean.Elab.Command.instMonadCommandElabM = let i := inferInstanceAs (Monad Lean.Elab.Command.CommandElabM); Monad.mk
Like Core.tryCatchRuntimeEx
; runtime errors are generally used to abort term elaboration, so we do
want to catch and process them at the command level.
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- Lean.Elab.Command.tryCatch x h = tryCatch x fun (ex : Lean.Exception) => if ex.isInterrupt = true then throw ex else h ex
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- Lean.Elab.Command.instMonadExceptOfExceptionCommandElabM = { throw := fun {α : Type} => throw, tryCatch := fun {α : Type} => Lean.Elab.Command.tryCatch }
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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)
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- Lean.Elab.Command.instMonadOptionsCommandElabM = { getOptions := do let __do_lift ← get pure __do_lift.scopes.head!.opts }
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- Lean.Elab.Command.getRef = do let __do_lift ← read pure __do_lift.ref
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- Lean.Elab.Command.instAddMessageContextCommandElabM = { addMessageContext := Lean.addMessageContextPartial }
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- Lean.Elab.Command.liftCoreM x = do let __do_lift ← Lean.Elab.Command.runCore (observing x) ofExcept __do_lift
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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)
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- Lean.Elab.Command.instMonadLiftTIOCommandElabM = { monadLift := fun {α : Type} => Lean.Elab.Command.liftIO }
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- Lean.Elab.Command.getScope = do let __do_lift ← get pure __do_lift.scopes.head!
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- Lean.Elab.Command.getCurrMacroScope = do let __do_lift ← read pure __do_lift.currMacroScope
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- Lean.Elab.Command.getMainModule = do let __do_lift ← Lean.getEnv pure __do_lift.mainModule
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Disables incremental command reuse and reporting for act
if cond
is true by setting
Context.snap?
to none
.
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Elaborate x
with stx
on the macro stack
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Snapshot after macro expansion of a command.
- diagnostics : Lean.Language.Snapshot.Diagnostics
- infoTree? : Option Lean.Elab.InfoTree
- isFatal : Bool
- macroDecl : Lake.Name
The declaration name of the macro.
- newStx : Lean.Syntax
The expanded syntax tree.
- newNextMacroScope : Nat
State.nextMacroScope
after expansion. - hasTraces : Bool
Whether any traces were present after expansion.
Follow-up elaboration snapshots, one per command if
newStx
is a sequence of commands.
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Option for showing elaboration errors from partial syntax errors.
elabCommand
wrapper that should be used for the initial invocation, not for recursive calls after
macro expansion etc.
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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')
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Return identifier names in the given bracketed binder.
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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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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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Catches and logs exceptions occurring in x
. Unlike try catch
in CommandElabM
, this function
catches interrupt exceptions as well and thus is intended for use at the top level of elaboration.
Interrupt and abort exceptions are caught but not logged.
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- Lean.Elab.Command.withLoggingExceptions x ctx ref = (Lean.Elab.withLogging x ctx ref).catchExceptions fun (x : Lean.Exception) => pure ()
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- Lean.Elab.Command.getScopes = do let __do_lift ← get pure __do_lift.scopes
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- Lean.Elab.Command.getLevelNames = do let __do_lift ← Lean.Elab.Command.getScope pure __do_lift.levelNames
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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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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.