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Refactor ModuleS fields public_glob_count, private_glob_count, and

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`resolved_globs` into a single field `globs: RefCell<Vec<ImportDirective>>`.
This commit is contained in:
Jeffrey Seyfried 2016-03-17 11:05:09 +00:00
parent 0d1bc02da8
commit 5ff21f138a
3 changed files with 25 additions and 57 deletions
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7
src/librustc_resolve/build_reduced_graph.rs
View File

@ -538,13 +538,6 @@ impl<'b, 'tcx:'b> Resolver<'b, 'tcx> {
module_.increment_outstanding_references_for(target, ValueNS, is_public);
module_.increment_outstanding_references_for(target, TypeNS, is_public);
}
GlobImport if !is_prelude => {
// Set the glob flag. This tells us that we don't know the
// module's exports ahead of time.
module_.inc_glob_count(is_public)
}
// Prelude imports are not included in the glob counts since they do not get added to
// `resolved_globs` -- they are handled separately in `resolve_imports`.
GlobImport => {}
}

22
src/librustc_resolve/lib.rs
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@ -849,13 +849,7 @@ pub struct ModuleS<'a> {
prelude: RefCell<Option<Module<'a>>>,
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.
public_glob_count: Cell<usize>,
// The number of private glob imports in this module.
private_glob_count: Cell<usize>,
globs: RefCell<Vec<&'a ImportDirective<'a>>>,
// Whether this module is populated. If not populated, any attempt to
// access the children must be preceded with a
@ -883,19 +877,12 @@ impl<'a> ModuleS<'a> {
module_children: RefCell::new(NodeMap()),
prelude: RefCell::new(None),
glob_importers: RefCell::new(Vec::new()),
resolved_globs: RefCell::new((Vec::new(), Vec::new())),
public_glob_count: Cell::new(0),
private_glob_count: Cell::new(0),
globs: RefCell::new((Vec::new())),
populated: Cell::new(!external),
arenas: arenas
}
}
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);
}
fn for_each_child<F: FnMut(Name, Namespace, &'a NameBinding<'a>)>(&self, mut f: F) {
for (&(name, ns), name_resolution) in self.resolutions.borrow().iter() {
name_resolution.binding.map(|binding| f(name, ns, binding));
@ -928,11 +915,6 @@ impl<'a> ModuleS<'a> {
_ => false,
}
}
fn inc_glob_count(&self, is_public: bool) {
let glob_count = if is_public { &self.public_glob_count } else { &self.private_glob_count };
glob_count.set(glob_count.get() + 1);
}
}
impl<'a> fmt::Debug for ModuleS<'a> {

51
src/librustc_resolve/resolve_imports.rs
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@ -212,29 +212,15 @@ impl<'a> ::ModuleS<'a> {
});
}
let (ref mut public_globs, ref mut private_globs) = *self.resolved_globs.borrow_mut();
// Check if the public globs are determined
if public_globs.len() < self.public_glob_count.get() {
return Indeterminate;
// Check if the globs are determined
for directive in self.globs.borrow().iter() {
if !allow_private_imports && !directive.is_public { continue }
match directive.target_module.get() {
None => return Indeterminate,
Some(target_module) => match target_module.resolve_name(name, ns, false) {
Indeterminate => return Indeterminate,
_ => {}
}
for module in public_globs.iter() {
if let Indeterminate = module.resolve_name(name, ns, false) {
return Indeterminate;
}
}
if !allow_private_imports {
return Failed(None);
}
// Check if the private globs are determined
if private_globs.len() < self.private_glob_count.get() {
return Indeterminate;
}
for module in private_globs.iter() {
if let Indeterminate = module.resolve_name(name, ns, false) {
return Indeterminate;
}
}
@ -259,6 +245,18 @@ impl<'a> ::ModuleS<'a> {
})
}
pub fn add_import_directive(&self, directive: ImportDirective<'a>) {
let directive = self.arenas.alloc_import_directive(directive);
self.unresolved_imports.borrow_mut().push(directive);
if let GlobImport = directive.subclass {
// We don't add prelude imports to the globs since they only affect lexical scopes,
// which are not relevant to import resolution.
if !directive.is_prelude {
self.globs.borrow_mut().push(directive);
}
}
}
pub fn increment_outstanding_references_for(&self, name: Name, ns: Namespace, is_public: bool) {
self.resolutions.borrow_mut().entry((name, ns)).or_insert_with(Default::default)
.increment_outstanding_references(is_public);
@ -603,12 +601,8 @@ impl<'a, 'b:'a, 'tcx:'b> ImportResolver<'a, 'b, 'tcx> {
return Success(());
}
// Add to target_module's glob_importers and module_'s resolved_globs
// Add to target_module's glob_importers
target_module.glob_importers.borrow_mut().push((module_, directive));
match *module_.resolved_globs.borrow_mut() {
(ref mut public_globs, _) if directive.is_public => public_globs.push(target_module),
(_, ref mut private_globs) => private_globs.push(target_module),
}
for (&(name, ns), resolution) in target_module.resolutions.borrow().iter() {
if let Some(Success(binding)) = resolution.try_result(false) {
@ -635,8 +629,7 @@ impl<'a, 'b:'a, 'tcx:'b> ImportResolver<'a, 'b, 'tcx> {
// reporting conflicts, reporting the PRIVATE_IN_PUBLIC lint, and reporting unresolved imports.
fn finalize_resolutions(&mut self, module: Module<'b>, report_unresolved_imports: bool) {
// Since import resolution is finished, globs will not define any more names.
module.public_glob_count.set(0); module.private_glob_count.set(0);
*module.resolved_globs.borrow_mut() = (Vec::new(), Vec::new());
*module.globs.borrow_mut() = Vec::new();
let mut reexports = Vec::new();
for (&(name, ns), resolution) in module.resolutions.borrow().iter() {