Add a type parameter to ImportDirective

src/librustc_resolve/lib.rs

@@ -828,7 +828,7 @@ pub struct ModuleS<'a> {
     extern_crate_id: Option<NodeId>,
 
     resolutions: RefCell<HashMap<(Name, Namespace), NameResolution<'a>>>,
-    unresolved_imports: RefCell<Vec<&'a ImportDirective>>,
+    unresolved_imports: RefCell<Vec<&'a ImportDirective<'a>>>,
 
     // The module children of this node, including normal modules and anonymous modules.
     // Anonymous children are pseudo-modules that are implicitly created around items
@@ -848,7 +848,7 @@ pub struct ModuleS<'a> {
 
     prelude: RefCell<Option<Module<'a>>>,
 
-    glob_importers: RefCell<Vec<(Module<'a>, &'a ImportDirective)>>,
+    glob_importers: RefCell<Vec<(Module<'a>, &'a ImportDirective<'a>)>>,
     resolved_globs: RefCell<(Vec<Module<'a>> /* public */, Vec<Module<'a>> /* private */)>,
 
     // The number of public glob imports in this module.
@@ -891,7 +891,7 @@ fn new(parent_link: ParentLink<'a>,
         }
     }
 
-    fn add_import_directive(&self, import_directive: ImportDirective) {
+    fn add_import_directive(&self, import_directive: ImportDirective<'a>) {
         let import_directive = self.arenas.alloc_import_directive(import_directive);
         self.unresolved_imports.borrow_mut().push(import_directive);
     }
@@ -1134,7 +1134,7 @@ pub struct Resolver<'a, 'tcx: 'a> {
 struct ResolverArenas<'a> {
     modules: arena::TypedArena<ModuleS<'a>>,
     name_bindings: arena::TypedArena<NameBinding<'a>>,
-    import_directives: arena::TypedArena<ImportDirective>,
+    import_directives: arena::TypedArena<ImportDirective<'a>>,
 }
 
 impl<'a> ResolverArenas<'a> {
@@ -1144,7 +1144,8 @@ fn alloc_module(&'a self, module: ModuleS<'a>) -> Module<'a> {
     fn alloc_name_binding(&'a self, name_binding: NameBinding<'a>) -> &'a NameBinding<'a> {
         self.name_bindings.alloc(name_binding)
     }
-    fn alloc_import_directive(&'a self, import_directive: ImportDirective) -> &'a ImportDirective {
+    fn alloc_import_directive(&'a self, import_directive: ImportDirective<'a>)
+                              -> &'a ImportDirective {
         self.import_directives.alloc(import_directive)
     }
 }

src/librustc_resolve/resolve_imports.rs

@@ -57,7 +57,7 @@ pub fn single(target: Name, source: Name) -> Self {
 
 /// One import directive.
 #[derive(Debug,Clone)]
-pub struct ImportDirective {
+pub struct ImportDirective<'a> {
     module_path: Vec<Name>,
     subclass: ImportDirectiveSubclass,
     span: Span,
@@ -66,14 +66,14 @@ pub struct ImportDirective {
     is_prelude: bool,
 }
 
-impl ImportDirective {
+impl<'a> ImportDirective<'a> {
     pub fn new(module_path: Vec<Name>,
                subclass: ImportDirectiveSubclass,
                span: Span,
                id: NodeId,
                is_public: bool,
                is_prelude: bool)
-               -> ImportDirective {
+               -> Self {
         ImportDirective {
             module_path: module_path,
             subclass: subclass,
@@ -86,9 +86,8 @@ pub fn new(module_path: Vec<Name>,
 
     // Given the binding to which this directive resolves in a particular namespace,
     // this returns the binding for the name this directive defines in that namespace.
-    fn import<'a>(&self,
-                  binding: &'a NameBinding<'a>,
-                  privacy_error: Option<Box<PrivacyError<'a>>>) -> NameBinding<'a> {
+    fn import(&self, binding: &'a NameBinding<'a>, privacy_error: Option<Box<PrivacyError<'a>>>)
+              -> NameBinding<'a> {
         let mut modifiers = match self.is_public {
             true => DefModifiers::PUBLIC | DefModifiers::IMPORTABLE,
             false => DefModifiers::empty(),
@@ -292,7 +291,7 @@ fn define_in_glob_importers(&self, name: Name, ns: Namespace, binding: &'a NameB
 struct ImportResolvingError<'a> {
     /// Module where the error happened
     source_module: Module<'a>,
-    import_directive: &'a ImportDirective,
+    import_directive: &'a ImportDirective<'a>,
     span: Span,
     help: String,
 }
@@ -424,7 +423,7 @@ fn resolve_imports_in_current_module(&mut self, errors: &mut Vec<ImportResolving
     /// don't know whether the name exists at the moment due to other
     /// currently-unresolved imports, or success if we know the name exists.
     /// If successful, the resolved bindings are written into the module.
-    fn resolve_import(&mut self, directive: &'b ImportDirective) -> ResolveResult<()> {
+    fn resolve_import(&mut self, directive: &'b ImportDirective<'b>) -> ResolveResult<()> {
         debug!("(resolving import for module) resolving import `{}::...` in `{}`",
                names_to_string(&directive.module_path),
                module_to_string(self.resolver.current_module));
@@ -579,7 +578,7 @@ fn resolve_import(&mut self, directive: &'b ImportDirective) -> ResolveResult<()
     // succeeds or bails out (as importing * from an empty module or a module
     // that exports nothing is valid). target_module is the module we are
     // actually importing, i.e., `foo` in `use foo::*`.
-    fn resolve_glob_import(&mut self, target_module: Module<'b>, directive: &'b ImportDirective)
+    fn resolve_glob_import(&mut self, target_module: Module<'b>, directive: &'b ImportDirective<'b>)
                            -> ResolveResult<()> {
         if let Some(Def::Trait(_)) = target_module.def {
             self.resolver.session.span_err(directive.span, "items in traits are not importable.");