80 lines
2 KiB
Text
80 lines
2 KiB
Text
/-
|
|
Copyright (c) 2019 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
Authors: Leonardo de Moura
|
|
-/
|
|
module
|
|
|
|
prelude
|
|
public import Init.Notation
|
|
public import Init.Data.Option.Coe
|
|
|
|
public section
|
|
|
|
namespace Lean
|
|
|
|
/-! # Private name support.
|
|
|
|
Suppose the user marks as declaration `n` as private. Then, we create
|
|
the name: `_private.<module_name>.0 ++ n`.
|
|
We say `_private.<module_name>.0` is the "private prefix"
|
|
|
|
We assume that `n` is a valid user name and does not contain
|
|
`Name.num` constructors. Thus, we can easily convert from
|
|
private internal name to the user given name.
|
|
-/
|
|
|
|
def privateHeader : Name := `_private
|
|
|
|
def mkPrivateNameCore (mainModule : Name) (n : Name) : Name :=
|
|
Name.mkNum (privateHeader ++ mainModule) 0 ++ n
|
|
|
|
def isPrivateName : Name → Bool
|
|
| n@(.str p _) => n == privateHeader || isPrivateName p
|
|
| .num p _ => isPrivateName p
|
|
| _ => false
|
|
|
|
@[export lean_is_private_name]
|
|
def isPrivateNameExport (n : Name) : Bool :=
|
|
isPrivateName n
|
|
|
|
/--
|
|
Return `true` if `n` is of the form `_private.<module_name>.0`
|
|
See comment above.
|
|
-/
|
|
def isPrivatePrefix (n : Name) : Bool :=
|
|
match n with
|
|
| .num p 0 => go p
|
|
| _ => false
|
|
where
|
|
go (n : Name) : Bool :=
|
|
n == privateHeader ||
|
|
match n with
|
|
| .str p _ => go p
|
|
| _ => false
|
|
|
|
private def privateToUserNameAux (n : Name) : Name :=
|
|
match n with
|
|
| .str p s => .str (privateToUserNameAux p) s
|
|
| .num p i => if isPrivatePrefix n then .anonymous else .num (privateToUserNameAux p) i
|
|
| _ => .anonymous
|
|
|
|
@[export lean_private_to_user_name]
|
|
def privateToUserName? (n : Name) : Option Name :=
|
|
if isPrivateName n then privateToUserNameAux n
|
|
else none
|
|
|
|
def privateToUserName (n : Name) : Name :=
|
|
if isPrivateName n then privateToUserNameAux n
|
|
else n
|
|
|
|
private def privatePrefixAux : Name → Name
|
|
| .str p _ => privatePrefixAux p
|
|
| n => n
|
|
|
|
@[export lean_private_prefix]
|
|
def privatePrefix? (n : Name) : Option Name :=
|
|
if isPrivateName n then privatePrefixAux n
|
|
else none
|
|
|
|
end Lean
|