87 lines
2.9 KiB
Text
87 lines
2.9 KiB
Text
/-
|
|
Copyright (c) 2020 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
Author: Leonardo de Moura
|
|
-/
|
|
import Lean.Environment
|
|
import Lean.Syntax
|
|
import Lean.MetavarContext
|
|
import Lean.Data.OpenDecl
|
|
|
|
namespace Lean
|
|
register_builtin_option pp.raw : Bool := {
|
|
defValue := false
|
|
group := "pp"
|
|
descr := "(pretty printer) print raw expression/syntax tree"
|
|
}
|
|
register_builtin_option pp.raw.showInfo : Bool := {
|
|
defValue := false
|
|
group := "pp"
|
|
descr := "(pretty printer) print `SourceInfo` metadata with raw printer"
|
|
}
|
|
register_builtin_option pp.raw.maxDepth : Nat := {
|
|
defValue := 32
|
|
group := "pp"
|
|
descr := "(pretty printer) maximum `Syntax` depth for raw printer"
|
|
}
|
|
register_builtin_option pp.rawOnError : Bool := {
|
|
defValue := false
|
|
group := "pp"
|
|
descr := "(pretty printer) fallback to 'raw' printer when pretty printer fails"
|
|
}
|
|
|
|
structure PPContext where
|
|
env : Environment
|
|
mctx : MetavarContext := {}
|
|
lctx : LocalContext := {}
|
|
opts : Options := {}
|
|
currNamespace : Name := Name.anonymous
|
|
openDecls : List OpenDecl := []
|
|
|
|
structure PPFns where
|
|
ppExpr : PPContext → Expr → IO Format
|
|
ppTerm : PPContext → Syntax → IO Format
|
|
ppGoal : PPContext → MVarId → IO Format
|
|
|
|
instance : Inhabited PPFns := ⟨⟨arbitrary, arbitrary, arbitrary⟩⟩
|
|
|
|
builtin_initialize ppFnsRef : IO.Ref PPFns ←
|
|
IO.mkRef {
|
|
ppExpr := fun ctx e => return format (toString e),
|
|
ppTerm := fun ctx stx => return stx.formatStx (some <| pp.raw.maxDepth.get ctx.opts)
|
|
ppGoal := fun ctx mvarId => return "goal"
|
|
}
|
|
|
|
builtin_initialize ppExt : EnvExtension PPFns ←
|
|
registerEnvExtension ppFnsRef.get
|
|
|
|
def ppExpr (ctx : PPContext) (e : Expr) : IO Format := do
|
|
let e := ctx.mctx.instantiateMVars e |>.1
|
|
if pp.raw.get ctx.opts then
|
|
return format (toString e)
|
|
else
|
|
try
|
|
ppExt.getState ctx.env |>.ppExpr ctx e
|
|
catch ex =>
|
|
if pp.rawOnError.get ctx.opts then
|
|
pure f!"[Error pretty printing expression: {ex}. Falling back to raw printer.]{Format.line}{e}"
|
|
else
|
|
pure f!"failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)"
|
|
|
|
def ppTerm (ctx : PPContext) (stx : Syntax) : IO Format :=
|
|
let fmtRaw := fun () => stx.formatStx (some <| pp.raw.maxDepth.get ctx.opts) (pp.raw.showInfo.get ctx.opts)
|
|
if pp.raw.get ctx.opts then
|
|
return fmtRaw ()
|
|
else
|
|
try
|
|
ppExt.getState ctx.env |>.ppTerm ctx stx
|
|
catch ex =>
|
|
if pp.rawOnError.get ctx.opts then
|
|
pure f!"[Error pretty printing syntax: {ex}. Falling back to raw printer.]{Format.line}{fmtRaw ()}"
|
|
else
|
|
pure f!"failed to pretty print term (use 'set_option pp.rawOnError true' for raw representation)"
|
|
|
|
def ppGoal (ctx : PPContext) (mvarId : MVarId) : IO Format :=
|
|
ppExt.getState ctx.env |>.ppGoal ctx mvarId
|
|
|
|
end Lean
|