/-
Copyright (c) 2024 Mario Carneiro. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Mario Carneiro
-/
prelude
import Lean.Compiler.InitAttr
import Lean.DocString

namespace Lean

def declareBuiltinDocStringAndRanges (declName : Name) : AttrM Unit := do
  if let some doc ← findDocString? (← getEnv) declName (includeBuiltin := false) then
    declareBuiltin (declName ++ `docString) (mkAppN (mkConst ``addBuiltinDocString) #[toExpr declName, toExpr doc])
  if let some declRanges ← findDeclarationRanges? declName then
    declareBuiltin (declName ++ `declRange) (mkAppN (mkConst ``addBuiltinDeclarationRanges) #[toExpr declName, toExpr declRanges])

builtin_initialize
  registerBuiltinAttribute {
    name  := `builtin_doc
    descr := "make the docs and location of this declaration available as a builtin"
    add   := fun decl stx _ => do
      Attribute.Builtin.ensureNoArgs stx
      declareBuiltinDocStringAndRanges decl
  }

end Lean