1 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! A pass that checks to make sure private fields and methods aren't used
12 //! outside their scopes. This pass will also generate a set of exported items
13 //! which are available for use externally when compiled as a library.
15 use util
::nodemap
::{DefIdSet, FnvHashMap}
;
18 use syntax
::ast
::NodeId
;
20 // Accessibility levels, sorted in ascending order
21 #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
22 pub enum AccessLevel
{
23 // Exported items + items participating in various kinds of public interfaces,
24 // but not directly nameable. For example, if function `fn f() -> T {...}` is
25 // public, then type `T` is exported. Its values can be obtained by other crates
26 // even if the type itseld is not nameable.
27 // FIXME: Mostly unimplemented. Only `type` aliases export items currently.
29 // Public items + items accessible to other crates with help of `pub use` reexports
31 // Items accessible to other crates directly, without help of reexports
35 // Accessibility levels for reachable HIR nodes
37 pub struct AccessLevels
<Id
= NodeId
> {
38 pub map
: FnvHashMap
<Id
, AccessLevel
>
41 impl<Id
: Hash
+ Eq
> AccessLevels
<Id
> {
42 pub fn is_reachable(&self, id
: Id
) -> bool
{
43 self.map
.contains_key(&id
)
45 pub fn is_exported(&self, id
: Id
) -> bool
{
46 self.map
.get(&id
) >= Some(&AccessLevel
::Exported
)
48 pub fn is_public(&self, id
: Id
) -> bool
{
49 self.map
.get(&id
) >= Some(&AccessLevel
::Public
)
53 impl<Id
: Hash
+ Eq
> Default
for AccessLevels
<Id
> {
54 fn default() -> Self {
55 AccessLevels { map: Default::default() }
59 /// A set containing all exported definitions from external crates.
60 /// The set does not contain any entries from local crates.
61 pub type ExternalExports
= DefIdSet
;