84 lines
2.4 KiB
Text
84 lines
2.4 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
|
||
-/
|
||
prelude
|
||
import Init.Lean.Environment
|
||
|
||
namespace Lean
|
||
|
||
def mkProtectedExtension : IO TagDeclarationExtension :=
|
||
mkTagDeclarationExtension `protected
|
||
|
||
@[init mkProtectedExtension]
|
||
constant protectedExt : TagDeclarationExtension := arbitrary _
|
||
|
||
@[export lean_add_protected]
|
||
def addProtected (env : Environment) (n : Name) : Environment :=
|
||
protectedExt.tag env n
|
||
|
||
@[export lean_is_protected]
|
||
def isProtected (env : Environment) (n : Name) : Bool :=
|
||
protectedExt.isTagged env n
|
||
|
||
def mkPrivateExtension : IO (EnvExtension Nat) :=
|
||
registerEnvExtension (pure 1)
|
||
|
||
@[init mkPrivateExtension]
|
||
constant privateExt : EnvExtension Nat := arbitrary _
|
||
|
||
/- Private name support.
|
||
|
||
Suppose the user marks as declaration `n` as private. Then, we create
|
||
the name: `_private.<module_name>.<index> ++ n`.
|
||
We say `_private.<module_name>.<index>` is the "private prefix"
|
||
where `<index>` comes from the environment extension `privateExt`.
|
||
|
||
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 user given name.
|
||
-/
|
||
|
||
def privateHeader : Name := `_private
|
||
|
||
@[export lean_mk_private_prefix]
|
||
def mkPrivatePrefix (env : Environment) : Environment × Name :=
|
||
let idx := privateExt.getState env;
|
||
let p := mkNameNum (privateHeader ++ env.mainModule) idx;
|
||
let env := privateExt.setState env (idx+1);
|
||
(env, p)
|
||
|
||
@[export lean_mk_private_name]
|
||
def mkPrivateName (env : Environment) (n : Name) : Environment × Name :=
|
||
let (env, p) := mkPrivatePrefix env;
|
||
(env, p ++ n)
|
||
|
||
def isPrivateName : Name → Bool
|
||
| n@(Name.str p _) => n == privateHeader || isPrivateName p
|
||
| Name.num p _ => isPrivateName p
|
||
| _ => false
|
||
|
||
@[export lean_is_private_name]
|
||
def isPrivateNameExport (n : Name) : Bool :=
|
||
isPrivateName n
|
||
|
||
private def privateToUserNameAux : Name → Name
|
||
| Name.str p s => mkNameStr (privateToUserNameAux p) s
|
||
| _ => Name.anonymous
|
||
|
||
@[export lean_private_to_user_name]
|
||
def privateToUserName (n : Name) : Option Name :=
|
||
if isPrivateName n then privateToUserNameAux n
|
||
else none
|
||
|
||
private def privatePrefixAux : Name → 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
|