273 lines
12 KiB
Text
273 lines
12 KiB
Text
/-
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Copyright (c) 2018 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Sebastian Ullrich, Leonardo de Moura
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Message Type used by the Lean frontend
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-/
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import Lean.Data.Position
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import Lean.Data.OpenDecl
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import Lean.Syntax
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import Lean.MetavarContext
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import Lean.Environment
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import Lean.Util.PPExt
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import Lean.Util.PPGoal
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namespace Lean
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def mkErrorStringWithPos (fileName : String) (line col : Nat) (msg : String) : String :=
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fileName ++ ":" ++ toString line ++ ":" ++ toString col ++ " " ++ toString msg
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inductive MessageSeverity
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| information | warning | error
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structure MessageDataContext :=
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(env : Environment) (mctx : MetavarContext) (lctx : LocalContext) (opts : Options)
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structure NamingContext :=
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(currNamespace : Name) (openDecls : List OpenDecl)
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/- Structure message data. We use it for reporting errors, trace messages, etc. -/
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inductive MessageData
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| ofFormat : Format → MessageData
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| ofSyntax : Syntax → MessageData
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| ofExpr : Expr → MessageData
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| ofLevel : Level → MessageData
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| ofName : Name → MessageData
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| ofGoal : MVarId → MessageData
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/- `withContext ctx d` specifies the pretty printing context `(env, mctx, lctx, opts)` for the nested expressions in `d`. -/
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| withContext : MessageDataContext → MessageData → MessageData
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| withNamingContext : NamingContext → MessageData → MessageData
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/- Lifted `Format.nest` -/
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| nest : Nat → MessageData → MessageData
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/- Lifted `Format.group` -/
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| group : MessageData → MessageData
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/- Lifted `Format.compose` -/
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| compose : MessageData → MessageData → MessageData
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/- Tagged sections. `Name` should be viewed as a "kind", and is used by `MessageData` inspector functions.
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Example: an inspector that tries to find "definitional equality failures" may look for the tag "DefEqFailure". -/
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| tagged : Name → MessageData → MessageData
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| node : Array MessageData → MessageData
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namespace MessageData
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instance : Inhabited MessageData := ⟨MessageData.ofFormat (arbitrary _)⟩
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def mkPPContext (nCtx : NamingContext) (ctx : MessageDataContext) : PPContext :=
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{ env := ctx.env, mctx := ctx.mctx, lctx := ctx.lctx, opts := ctx.opts,
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currNamespace := nCtx.currNamespace, openDecls := nCtx.openDecls }
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partial def formatAux : NamingContext → Option MessageDataContext → MessageData → IO Format
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| _, _, ofFormat fmt => pure fmt
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| _, _, ofLevel u => pure $ fmt u
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| _, _, ofName n => pure $ fmt n
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| nCtx, some ctx, ofSyntax s => ppTerm (mkPPContext nCtx ctx) s -- HACK: might not be a term
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| _, none, ofSyntax s => pure $ s.formatStx
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| _, none, ofExpr e => pure $ format (toString e)
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| nCtx, some ctx, ofExpr e => ppExpr (mkPPContext nCtx ctx) e
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| _, none, ofGoal mvarId => pure $ "goal " ++ format (mkMVar mvarId)
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| nCtx, some ctx, ofGoal mvarId => ppGoal (mkPPContext nCtx ctx) mvarId
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| nCtx, _, withContext ctx d => formatAux nCtx ctx d
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| _, ctx, withNamingContext nCtx d => formatAux nCtx ctx d
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| nCtx, ctx, tagged cls d => do d ← formatAux nCtx ctx d; pure $ Format.sbracket (format cls) ++ " " ++ d
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| nCtx, ctx, nest n d => Format.nest n <$> formatAux nCtx ctx d
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| nCtx, ctx, compose d₁ d₂ => do d₁ ← formatAux nCtx ctx d₁; d₂ ← formatAux nCtx ctx d₂; pure $ d₁ ++ d₂
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| nCtx, ctx, group d => Format.group <$> formatAux nCtx ctx d
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| nCtx, ctx, node ds => Format.nest 2 <$> ds.foldlM (fun r d => do d ← formatAux nCtx ctx d; pure $ r ++ Format.line ++ d) Format.nil
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protected def format (msgData : MessageData) : IO Format :=
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formatAux { currNamespace := Name.anonymous, openDecls := [] } none msgData
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protected def toString (msgData : MessageData) : IO String := do
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fmt ← msgData.format;
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pure $ toString fmt
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instance : HasAppend MessageData := ⟨compose⟩
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instance hasCoeOfFormat : HasCoe Format MessageData := ⟨ofFormat⟩
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instance hasCoeOfLevel : HasCoe Level MessageData := ⟨ofLevel⟩
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instance hasCoeOfExpr : HasCoe Expr MessageData := ⟨ofExpr⟩
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instance hasCoeOfName : HasCoe Name MessageData := ⟨ofName⟩
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instance hasCoeOfSyntax : HasCoe Syntax MessageData := ⟨ofSyntax⟩
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instance hasCoeOfOptExpr : HasCoe (Option Expr) MessageData :=
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⟨fun o => match o with | none => "none" | some e => ofExpr e⟩
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instance coeOfString : Coe String MessageData := ⟨ofFormat ∘ format⟩
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instance coeOfFormat : Coe Format MessageData := ⟨ofFormat⟩
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instance coeOfLevel : Coe Level MessageData := ⟨ofLevel⟩
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instance coeOfExpr : Coe Expr MessageData := ⟨ofExpr⟩
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instance coeOfName : Coe Name MessageData := ⟨ofName⟩
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instance coeOfSyntax : Coe Syntax MessageData := ⟨ofSyntax⟩
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instance coeOfOptExpr : Coe (Option Expr) MessageData :=
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⟨fun o => match o with | none => "none" | some e => ofExpr e⟩
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partial def arrayExpr.toMessageData (es : Array Expr) : Nat → MessageData → MessageData
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| i, acc =>
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if h : i < es.size then
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let e := es.get ⟨i, h⟩;
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let acc := if i == 0 then acc ++ ofExpr e else acc ++ ", " ++ ofExpr e;
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arrayExpr.toMessageData (i+1) acc
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else
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acc ++ "]"
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instance hasCoeOfArrayExpr : HasCoe (Array Expr) MessageData := ⟨fun es => arrayExpr.toMessageData es 0 "#["⟩
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instance coeOfArrayExpr : Coe (Array Expr) MessageData := ⟨fun es => arrayExpr.toMessageData es 0 "#["⟩
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def bracket (l : String) (f : MessageData) (r : String) : MessageData := group (nest l.length $ l ++ f ++ r)
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def paren (f : MessageData) : MessageData := bracket "(" f ")"
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def sbracket (f : MessageData) : MessageData := bracket "[" f "]"
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def joinSep : List MessageData → MessageData → MessageData
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| [], sep => Format.nil
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| [a], sep => a
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| a::as, sep => a ++ sep ++ joinSep as sep
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def ofList: List MessageData → MessageData
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| [] => "[]"
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| xs => sbracket $ joinSep xs ("," ++ Format.line)
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def ofArray (msgs : Array MessageData) : MessageData :=
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ofList msgs.toList
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instance hasCoeOfList : HasCoe (List MessageData) MessageData := ⟨ofList⟩
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instance hasCoeOfListExpr : HasCoe (List Expr) MessageData := ⟨fun es => ofList $ es.map ofExpr⟩
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instance coeOfList : Coe (List MessageData) MessageData := ⟨ofList⟩
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instance coeOfListExpr : Coe (List Expr) MessageData := ⟨fun es => ofList $ es.map ofExpr⟩
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end MessageData
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structure Message :=
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(fileName : String)
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(pos : Position)
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(endPos : Option Position := none)
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(severity : MessageSeverity := MessageSeverity.error)
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(caption : String := "")
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(data : MessageData)
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@[export lean_mk_message]
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def mkMessageEx (fileName : String) (pos : Position) (endPos : Option Position) (severity : MessageSeverity) (caption : String) (text : String) : Message :=
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{ fileName := fileName, pos := pos, endPos := endPos, severity := severity, caption := caption, data := text }
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namespace Message
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protected def toString (msg : Message) : IO String := do
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str ← msg.data.toString;
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pure $ mkErrorStringWithPos msg.fileName msg.pos.line msg.pos.column
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((match msg.severity with
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| MessageSeverity.information => ""
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| MessageSeverity.warning => "warning: "
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| MessageSeverity.error => "error: ") ++
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(if msg.caption == "" then "" else msg.caption ++ ":\n") ++ str)
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instance : Inhabited Message :=
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⟨{ fileName := "", pos := ⟨0, 1⟩, data := arbitrary _}⟩
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@[export lean_message_pos] def getPostEx (msg : Message) : Position := msg.pos
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@[export lean_message_severity] def getSeverityEx (msg : Message) : MessageSeverity := msg.severity
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@[export lean_message_string] unsafe def getMessageStringEx (msg : Message) : String :=
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match unsafeIO (msg.data.toString) with -- hack: this is going to be deleted
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| Except.ok msg => msg
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| Except.error e => "error formatting message: " ++ toString e
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end Message
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structure MessageLog :=
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(msgs : Std.PersistentArray Message := {})
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namespace MessageLog
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def empty : MessageLog := ⟨{}⟩
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def isEmpty (log : MessageLog) : Bool :=
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log.msgs.isEmpty
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instance : Inhabited MessageLog := ⟨{}⟩
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def add (msg : Message) (log : MessageLog) : MessageLog :=
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⟨log.msgs.push msg⟩
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protected def append (l₁ l₂ : MessageLog) : MessageLog :=
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⟨l₁.msgs ++ l₂.msgs⟩
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instance : HasAppend MessageLog :=
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⟨MessageLog.append⟩
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def hasErrors (log : MessageLog) : Bool :=
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log.msgs.any $ fun m => match m.severity with
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| MessageSeverity.error => true
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| _ => false
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def errorsToWarnings (log : MessageLog) : MessageLog :=
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{ msgs := log.msgs.map (fun m => match m.severity with | MessageSeverity.error => { m with severity := MessageSeverity.warning } | _ => m) }
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def getInfoMessages (log : MessageLog) : MessageLog :=
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{ msgs := log.msgs.filter fun m => match m.severity with | MessageSeverity.information => true | _ => false }
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def forM {m : Type → Type} [Monad m] (log : MessageLog) (f : Message → m Unit) : m Unit :=
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log.msgs.forM f
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def toList (log : MessageLog) : List Message :=
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(log.msgs.foldl (fun acc msg => msg :: acc) []).reverse
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end MessageLog
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def MessageData.nestD (msg : MessageData) : MessageData :=
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MessageData.nest 2 msg
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def indentD (msg : MessageData) : MessageData :=
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MessageData.nestD (Format.line ++ msg)
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def indentExpr (e : Expr) : MessageData :=
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indentD e
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namespace KernelException
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private def mkCtx (env : Environment) (lctx : LocalContext) (opts : Options) (msg : MessageData) : MessageData :=
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MessageData.withContext { env := env, mctx := {}, lctx := lctx, opts := opts } msg
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def toMessageData (e : KernelException) (opts : Options) : MessageData :=
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match e with
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| unknownConstant env constName => mkCtx env {} opts $ "(kernel) unknown constant " ++ constName
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| alreadyDeclared env constName => mkCtx env {} opts $ "(kernel) constant has already been declared " ++ constName
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| declTypeMismatch env decl givenType =>
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let process (n : Name) (expectedType : Expr) : MessageData :=
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"(kernel) declaration type mismatch " ++ n
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++ Format.line ++ "has type" ++ indentExpr givenType
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++ Format.line ++ "but it is expected to have type" ++ indentExpr expectedType;
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match decl with
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| Declaration.defnDecl { name := n, type := type, .. } => process n type
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| Declaration.thmDecl { name := n, type := type, .. } => process n type
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| _ => "(kernel) declaration type mismatch" -- TODO fix type checker, type mismatch for mutual decls does not have enough information
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| declHasMVars env constName _ => mkCtx env {} opts $ "(kernel) declaration has metavariables " ++ constName
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| declHasFVars env constName _ => mkCtx env {} opts $ "(kernel) declaration has free variables " ++ constName
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| funExpected env lctx e => mkCtx env lctx opts $ "(kernel) function expected" ++ indentExpr e
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| typeExpected env lctx e => mkCtx env lctx opts $ "(kernel) type expected" ++ indentExpr e
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| letTypeMismatch env lctx n _ _ => mkCtx env lctx opts $ "(kernel) let-declaration type mismatch " ++ n
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| exprTypeMismatch env lctx e _ => mkCtx env lctx opts $ "(kernel) type mismatch at " ++ indentExpr e
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| appTypeMismatch env lctx e fnType argType =>
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mkCtx env lctx opts $
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"application type mismatch" ++ indentExpr e
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++ Format.line ++ "argument has type" ++ indentExpr argType
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++ Format.line ++ "but function has type" ++ indentExpr fnType
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| invalidProj env lctx e => mkCtx env lctx opts $ "(kernel) invalid projection" ++ indentExpr e
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| other msg => "(kernel) " ++ msg
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end KernelException
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class AddMessageContext (m : Type → Type) :=
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(addMessageContext : MessageData → m MessageData)
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export AddMessageContext (addMessageContext)
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instance addMessageContextTrans (m n) [AddMessageContext m] [MonadLift m n] : AddMessageContext n :=
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{ addMessageContext := fun msg => liftM (addMessageContext msg : m _) }
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def addMessageContextPartial {m} [Monad m] [MonadEnv m] [MonadOptions m] (msgData : MessageData) : m MessageData := do
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env ← getEnv;
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opts ← getOptions;
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pure $ MessageData.withContext { env := env, mctx := {}, lctx := {}, opts := opts } msgData
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def addMessageContextFull {m} [Monad m] [MonadEnv m] [MonadMCtx m] [MonadLCtx m] [MonadOptions m] (msgData : MessageData) : m MessageData := do
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env ← getEnv;
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mctx ← getMCtx;
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lctx ← getLCtx;
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opts ← getOptions;
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pure $ MessageData.withContext { env := env, mctx := mctx, lctx := lctx, opts := opts } msgData
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end Lean
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