124 lines
4.3 KiB
Text
124 lines
4.3 KiB
Text
/-
|
||
Copyright (c) 2020 Microsoft Corporation. All rights reserved.
|
||
Released under Apache 2.0 license as described in the file LICENSE.
|
||
Authors: Leonardo de Moura
|
||
-/
|
||
import Lean.Util.RecDepth
|
||
import Lean.Util.Trace
|
||
import Lean.Environment
|
||
import Lean.Exception
|
||
import Lean.InternalExceptionId
|
||
import Lean.Eval
|
||
import Lean.MonadEnv
|
||
import Lean.ResolveName
|
||
|
||
namespace Lean
|
||
namespace Core
|
||
|
||
structure State where
|
||
env : Environment
|
||
nextMacroScope : MacroScope := firstFrontendMacroScope + 1
|
||
ngen : NameGenerator := {}
|
||
traceState : TraceState := {}
|
||
deriving Inhabited
|
||
|
||
structure Context where
|
||
options : Options := {}
|
||
currRecDepth : Nat := 0
|
||
maxRecDepth : Nat := 1000
|
||
ref : Syntax := Syntax.missing
|
||
currNamespace : Name := Name.anonymous
|
||
openDecls : List OpenDecl := []
|
||
|
||
abbrev CoreM := ReaderT Context $ StateRefT State (EIO Exception)
|
||
|
||
instance : Inhabited (CoreM α) where
|
||
default := fun _ _ => throw arbitrary
|
||
|
||
instance : MonadRef CoreM where
|
||
getRef := return (← read).ref
|
||
withRef ref x := withReader (fun ctx => { ctx with ref := ref }) x
|
||
|
||
instance : MonadEnv CoreM where
|
||
getEnv := return (← get).env
|
||
modifyEnv f := modify fun s => { s with env := f s.env }
|
||
|
||
instance : MonadOptions CoreM where
|
||
getOptions := return (← read).options
|
||
|
||
instance : AddMessageContext CoreM where
|
||
addMessageContext := addMessageContextPartial
|
||
|
||
instance : MonadNameGenerator CoreM where
|
||
getNGen := return (← get).ngen
|
||
setNGen ngen := modify fun s => { s with ngen := ngen }
|
||
|
||
instance : MonadRecDepth CoreM where
|
||
withRecDepth d x := withReader (fun ctx => { ctx with currRecDepth := d }) x
|
||
getRecDepth := return (← read).currRecDepth
|
||
getMaxRecDepth := return (← read).maxRecDepth
|
||
|
||
instance : MonadResolveName CoreM where
|
||
getCurrNamespace := return (← read).currNamespace
|
||
getOpenDecls := return (← read).openDecls
|
||
|
||
@[inline] def liftIOCore (x : IO α) : CoreM α := do
|
||
let ref ← getRef
|
||
IO.toEIO (fun (err : IO.Error) => Exception.error ref (toString err)) x
|
||
|
||
instance : MonadLift IO CoreM where
|
||
monadLift := liftIOCore
|
||
|
||
instance : MonadTrace CoreM where
|
||
getTraceState := return (← get).traceState
|
||
modifyTraceState f := modify fun s => { s with traceState := f s.traceState }
|
||
|
||
private def mkFreshNameImp (n : Name) : CoreM Name := do
|
||
let fresh ← modifyGet fun s => (s.nextMacroScope, { s with nextMacroScope := s.nextMacroScope + 1 })
|
||
let env ← getEnv
|
||
pure $ addMacroScope env.mainModule n fresh
|
||
|
||
def mkFreshUserName [MonadLiftT CoreM m] (n : Name) : m Name :=
|
||
liftM $ mkFreshNameImp n
|
||
|
||
@[inline] def CoreM.run (x : CoreM α) (ctx : Context) (s : State) : EIO Exception (α × State) :=
|
||
(x ctx).run s
|
||
|
||
@[inline] def CoreM.run' (x : CoreM α) (ctx : Context) (s : State) : EIO Exception α :=
|
||
Prod.fst <$> x.run ctx s
|
||
|
||
@[inline] def CoreM.toIO (x : CoreM α) (ctx : Context) (s : State) : IO (α × State) := do
|
||
match (← (x.run ctx s).toIO') with
|
||
| Except.error (Exception.error _ msg) => do let e ← msg.toString; throw $ IO.userError e
|
||
| Except.error (Exception.internal id _) => throw $ IO.userError $ "internal exception #" ++ toString id.idx
|
||
| Except.ok a => pure a
|
||
|
||
instance [MetaEval α] : MetaEval (CoreM α) where
|
||
eval env opts x _ := do
|
||
let x : CoreM α := do try x finally printTraces
|
||
let (a, s) ← x.toIO { maxRecDepth := getMaxRecDepth opts, options := opts } { env := env }
|
||
MetaEval.eval s.env opts a (hideUnit := true)
|
||
|
||
-- withIncRecDepth for a monad `m` such that `[MonadControlT CoreM n]`
|
||
protected def withIncRecDepth [Monad m] [MonadControlT CoreM m] (x : m α) : m α :=
|
||
controlAt CoreM fun runInBase => withIncRecDepth (runInBase x)
|
||
|
||
end Core
|
||
|
||
export Core (CoreM mkFreshUserName)
|
||
|
||
@[inline] def catchInternalId [Monad m] [MonadExcept Exception m] (id : InternalExceptionId) (x : m α) (h : Exception → m α) : m α := do
|
||
try
|
||
x
|
||
catch ex => match ex with
|
||
| Exception.error _ _ => throw ex
|
||
| Exception.internal id' _ => if id == id' then h ex else throw ex
|
||
|
||
@[inline] def catchInternalIds [Monad m] [MonadExcept Exception m] (ids : List InternalExceptionId) (x : m α) (h : Exception → m α) : m α := do
|
||
try
|
||
x
|
||
catch ex => match ex with
|
||
| Exception.error _ _ => throw ex
|
||
| Exception.internal id _ => if ids.contains id then h ex else throw ex
|
||
|
||
end Lean
|