Rollup merge of rust-lang#37301 - jseyfried:improve_metadata_modules, r=eddyb

metadata: improve some confusing type and module names

r? @eddyb

Author: Manishearth

src/librustc_driver/driver.rs

@@ -645,7 +645,8 @@ pub fn phase_2_configure_and_expand<'a, F>(sess: &Session,
     // its contents but the results of name resolution on those contents. Hopefully we'll push
     // this back at some point.
     let _ignore = sess.dep_graph.in_ignore();
-    let mut crate_loader = CrateLoader::new(sess, &cstore, &krate, crate_name);
+    let mut crate_loader = CrateLoader::new(sess, &cstore, crate_name, krate.config.clone());
+    crate_loader.preprocess(&krate);
     let resolver_arenas = Resolver::arenas();
     let mut resolver =
         Resolver::new(sess, &krate, make_glob_map, &mut crate_loader, &resolver_arenas);

src/librustc_driver/lib.rs

@@ -77,7 +77,7 @@ use rustc::session::config::nightly_options;
 use rustc::session::early_error;
 use rustc::lint::Lint;
 use rustc::lint;
-use rustc_metadata::loader;
+use rustc_metadata::locator;
 use rustc_metadata::cstore::CStore;
 use rustc::util::common::time;
 
@@ -578,8 +578,7 @@ impl RustcDefaultCalls {
                 &Input::File(ref ifile) => {
                     let path = &(*ifile);
                     let mut v = Vec::new();
-                    loader::list_file_metadata(&sess.target.target, path, &mut v)
-                        .unwrap();
+                    locator::list_file_metadata(&sess.target.target, path, &mut v).unwrap();
                     println!("{}", String::from_utf8(v).unwrap());
                 }
                 &Input::Str { .. } => {

src/librustc_metadata/creader.rs

@@ -11,7 +11,7 @@
 //! Validates all used crates and extern libraries and loads their metadata
 
 use cstore::{self, CStore, CrateSource, MetadataBlob};
-use loader::{self, CratePaths};
+use locator::{self, CratePaths};
 use macro_import;
 use schema::CrateRoot;
 
@@ -40,14 +40,14 @@ use syntax::parse::token::InternedString;
 use syntax_pos::{self, Span, mk_sp};
 use log;
 
-pub struct CrateLoader<'a> {
-    pub sess: &'a Session,
-    pub creader: CrateReader<'a>,
-    cstore: &'a CStore,
+pub struct Library {
+    pub dylib: Option<(PathBuf, PathKind)>,
+    pub rlib: Option<(PathBuf, PathKind)>,
+    pub metadata: MetadataBlob,
 }
 
-pub struct CrateReader<'a> {
-    sess: &'a Session,
+pub struct CrateLoader<'a> {
+    pub sess: &'a Session,
     cstore: &'a CStore,
     next_crate_num: CrateNum,
     foreign_item_map: FnvHashMap<String, Vec<ast::NodeId>>,
@@ -129,7 +129,7 @@ struct ExtensionCrate {
 
 enum PMDSource {
     Registered(Rc<cstore::CrateMetadata>),
-    Owned(loader::Library),
+    Owned(Library),
 }
 
 impl Deref for PMDSource {
@@ -145,7 +145,7 @@ impl Deref for PMDSource {
 
 enum LoadResult {
     Previous(CrateNum),
-    Loaded(loader::Library),
+    Loaded(Library),
 }
 
 pub struct Macros {
@@ -159,13 +159,13 @@ pub struct Macros {
     pub dylib: Option<PathBuf>,
 }
 
-impl<'a> CrateReader<'a> {
+impl<'a> CrateLoader<'a> {
     pub fn new(sess: &'a Session,
                cstore: &'a CStore,
                local_crate_name: &str,
                local_crate_config: ast::CrateConfig)
-               -> CrateReader<'a> {
-        CrateReader {
+               -> Self {
+        CrateLoader {
             sess: sess,
             cstore: cstore,
             next_crate_num: cstore.next_crate_num(),
@@ -281,7 +281,7 @@ impl<'a> CrateReader<'a> {
                       ident: &str,
                       name: &str,
                       span: Span,
-                      lib: loader::Library,
+                      lib: Library,
                       explicitly_linked: bool)
                       -> (CrateNum, Rc<cstore::CrateMetadata>,
                           cstore::CrateSource) {
@@ -306,7 +306,7 @@ impl<'a> CrateReader<'a> {
         // Maintain a reference to the top most crate.
         let root = if root.is_some() { root } else { &crate_paths };
 
-        let loader::Library { dylib, rlib, metadata } = lib;
+        let Library { dylib, rlib, metadata } = lib;
 
         let cnum_map = self.resolve_crate_deps(root, &crate_root, &metadata, cnum, span);
 
@@ -352,7 +352,7 @@ impl<'a> CrateReader<'a> {
             Some(cnum) => LoadResult::Previous(cnum),
             None => {
                 info!("falling back to a load");
-                let mut load_ctxt = loader::Context {
+                let mut locate_ctxt = locator::Context {
                     sess: self.sess,
                     span: span,
                     ident: ident,
@@ -368,9 +368,9 @@ impl<'a> CrateReader<'a> {
                     rejected_via_version: vec!(),
                     should_match_name: true,
                 };
-                match self.load(&mut load_ctxt) {
+                match self.load(&mut locate_ctxt) {
                     Some(result) => result,
-                    None => load_ctxt.report_load_errs(),
+                    None => locate_ctxt.report_errs(),
                 }
             }
         };
@@ -390,8 +390,8 @@ impl<'a> CrateReader<'a> {
         }
     }
 
-    fn load(&mut self, loader: &mut loader::Context) -> Option<LoadResult> {
-        let library = match loader.maybe_load_library_crate() {
+    fn load(&mut self, locate_ctxt: &mut locator::Context) -> Option<LoadResult> {
+        let library = match locate_ctxt.maybe_load_library_crate() {
             Some(lib) => lib,
             None => return None,
         };
@@ -405,11 +405,11 @@ impl<'a> CrateReader<'a> {
         // don't want to match a host crate against an equivalent target one
         // already loaded.
         let root = library.metadata.get_root();
-        if loader.triple == self.sess.opts.target_triple {
+        if locate_ctxt.triple == self.sess.opts.target_triple {
             let mut result = LoadResult::Loaded(library);
             self.cstore.iter_crate_data(|cnum, data| {
                 if data.name() == root.name && root.hash == data.hash() {
-                    assert!(loader.hash.is_none());
+                    assert!(locate_ctxt.hash.is_none());
                     info!("load success, going to previous cnum: {}", cnum);
                     result = LoadResult::Previous(cnum);
                 }
@@ -494,7 +494,7 @@ impl<'a> CrateReader<'a> {
         let mut target_only = false;
         let ident = info.ident.clone();
         let name = info.name.clone();
-        let mut load_ctxt = loader::Context {
+        let mut locate_ctxt = locator::Context {
             sess: self.sess,
             span: span,
             ident: &ident[..],
@@ -510,7 +510,7 @@ impl<'a> CrateReader<'a> {
             rejected_via_version: vec!(),
             should_match_name: true,
         };
-        let library = self.load(&mut load_ctxt).or_else(|| {
+        let library = self.load(&mut locate_ctxt).or_else(|| {
             if !is_cross {
                 return None
             }
@@ -519,15 +519,15 @@ impl<'a> CrateReader<'a> {
             target_only = true;
             should_link = info.should_link;
 
-            load_ctxt.target = &self.sess.target.target;
-            load_ctxt.triple = target_triple;
-            load_ctxt.filesearch = self.sess.target_filesearch(PathKind::Crate);
+            locate_ctxt.target = &self.sess.target.target;
+            locate_ctxt.triple = target_triple;
+            locate_ctxt.filesearch = self.sess.target_filesearch(PathKind::Crate);
 
-            self.load(&mut load_ctxt)
+            self.load(&mut locate_ctxt)
         });
         let library = match library {
             Some(l) => l,
-            None => load_ctxt.report_load_errs(),
+            None => locate_ctxt.report_errs(),
         };
 
         let (dylib, metadata) = match library {
@@ -890,7 +890,7 @@ impl<'a> CrateReader<'a> {
 }
 
 impl ExtensionCrate {
-    fn register(self, creader: &mut CrateReader) {
+    fn register(self, loader: &mut CrateLoader) {
         if !self.should_link {
             return
         }
@@ -901,31 +901,17 @@ impl ExtensionCrate {
         };
 
         // Register crate now to avoid double-reading metadata
-        creader.register_crate(&None,
-                               &self.ident,
-                               &self.name,
-                               self.span,
-                               library,
-                               true);
+        loader.register_crate(&None, &self.ident, &self.name, self.span, library, true);
     }
 }
 
 impl<'a> CrateLoader<'a> {
-    pub fn new(sess: &'a Session, cstore: &'a CStore, krate: &ast::Crate, crate_name: &str)
-               -> Self {
-        let loader = CrateLoader {
-            sess: sess,
-            cstore: cstore,
-            creader: CrateReader::new(sess, cstore, crate_name, krate.config.clone()),
-        };
-
+    pub fn preprocess(&mut self, krate: &ast::Crate) {
         for attr in krate.attrs.iter().filter(|m| m.name() == "link_args") {
             if let Some(ref linkarg) = attr.value_str() {
-                loader.cstore.add_used_link_args(&linkarg);
+                self.cstore.add_used_link_args(&linkarg);
             }
         }
-
-        loader
     }
 
     fn process_foreign_mod(&mut self, i: &ast::Item, fm: &ast::ForeignMod) {
@@ -982,7 +968,7 @@ impl<'a> CrateLoader<'a> {
                 Some(name) => name,
                 None => continue,
             };
-            let list = self.creader.foreign_item_map.entry(lib_name.to_string())
+            let list = self.foreign_item_map.entry(lib_name.to_string())
                                                     .or_insert(Vec::new());
             list.extend(fm.items.iter().map(|it| it.id));
         }
@@ -991,8 +977,8 @@ impl<'a> CrateLoader<'a> {
 
 impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
     fn postprocess(&mut self, krate: &ast::Crate) {
-        self.creader.inject_allocator_crate();
-        self.creader.inject_panic_runtime(krate);
+        self.inject_allocator_crate();
+        self.inject_panic_runtime(krate);
 
         if log_enabled!(log::INFO) {
             dump_crates(&self.cstore);
@@ -1001,7 +987,7 @@ impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
         for &(ref name, kind) in &self.sess.opts.libs {
             register_native_lib(self.sess, self.cstore, None, name.clone(), kind);
         }
-        self.creader.register_statically_included_foreign_items();
+        self.register_statically_included_foreign_items();
     }
 
     fn process_item(&mut self, item: &ast::Item, definitions: &hir_map::Definitions) {
@@ -1024,12 +1010,12 @@ impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
             }
         }
 
-        if let Some(info) = self.creader.extract_crate_info(item) {
+        if let Some(info) = self.extract_crate_info(item) {
             if !info.should_link {
                 return;
             }
 
-            let (cnum, ..) = self.creader.resolve_crate(
+            let (cnum, ..) = self.resolve_crate(
                 &None, &info.ident, &info.name, None, item.span, PathKind::Crate, true,
             );
 
@@ -1038,7 +1024,7 @@ impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
 
             let extern_crate =
                 ExternCrate { def_id: def_id, span: item.span, direct: true, path_len: len };
-            self.creader.update_extern_crate(cnum, extern_crate, &mut FnvHashSet());
+            self.update_extern_crate(cnum, extern_crate, &mut FnvHashSet());
 
             self.cstore.add_extern_mod_stmt_cnum(info.id, cnum);
         }

src/librustc_metadata/cstore.rs

@@ -11,7 +11,7 @@
 // The crate store - a central repo for information collected about external
 // crates and libraries
 
-use loader;
+use locator;
 use schema;
 
 use rustc::dep_graph::DepGraph;
@@ -43,7 +43,7 @@ pub type CrateNumMap = IndexVec<CrateNum, CrateNum>;
 
 pub enum MetadataBlob {
     Inflated(Bytes),
-    Archive(loader::ArchiveMetadata),
+    Archive(locator::ArchiveMetadata),
 }
 
 /// Holds information about a syntax_pos::FileMap imported from another crate.

src/librustc_metadata/csearch.rs renamed to src/librustc_metadata/cstore_impl.rs

@@ -10,7 +10,7 @@
 
 use cstore;
 use encoder;
-use loader;
+use locator;
 use schema;
 
 use rustc::middle::cstore::{InlinedItem, CrateStore, CrateSource, ExternCrate};
@@ -497,12 +497,12 @@ impl<'tcx> CrateStore<'tcx> for cstore::CStore {
 
     fn metadata_filename(&self) -> &str
     {
-        loader::METADATA_FILENAME
+        locator::METADATA_FILENAME
     }
 
     fn metadata_section_name(&self, target: &Target) -> &str
     {
-        loader::meta_section_name(target)
+        locator::meta_section_name(target)
     }
 
     fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, Option<PathBuf>)>

src/librustc_metadata/lib.rs

@@ -53,12 +53,12 @@ mod index_builder;
 mod index;
 mod encoder;
 mod decoder;
-mod csearch;
+mod cstore_impl;
 mod schema;
 
 pub mod creader;
 pub mod cstore;
-pub mod loader;
+pub mod locator;
 pub mod macro_import;
 
 __build_diagnostic_array! { librustc_metadata, DIAGNOSTICS }

src/librustc_metadata/loader.rs renamed to src/librustc_metadata/locator.rs

@@ -210,9 +210,10 @@
 //!
 //! That's the general overview of loading crates in the compiler, but it's by
 //! no means all of the necessary details. Take a look at the rest of
-//! metadata::loader or metadata::creader for all the juicy details!
+//! metadata::locator or metadata::creader for all the juicy details!
 
 use cstore::MetadataBlob;
+use creader::Library;
 use schema::{METADATA_HEADER, rustc_version};
 
 use rustc::hir::svh::Svh;
@@ -263,12 +264,6 @@ pub struct Context<'a> {
     pub should_match_name: bool,
 }
 
-pub struct Library {
-    pub dylib: Option<(PathBuf, PathKind)>,
-    pub rlib: Option<(PathBuf, PathKind)>,
-    pub metadata: MetadataBlob,
-}
-
 pub struct ArchiveMetadata {
     _archive: ArchiveRO,
     // points into self._archive
@@ -315,10 +310,10 @@ impl<'a> Context<'a> {
     }
 
     pub fn load_library_crate(&mut self) -> Library {
-        self.find_library_crate().unwrap_or_else(|| self.report_load_errs())
+        self.find_library_crate().unwrap_or_else(|| self.report_errs())
     }
 
-    pub fn report_load_errs(&mut self) -> ! {
+    pub fn report_errs(&mut self) -> ! {
         let add = match self.root {
             &None => String::new(),
             &Some(ref r) => format!(" which `{}` depends on",

src/librustc_metadata/macro_import.rs

@@ -122,7 +122,7 @@ impl<'a> CrateLoader<'a> {
             return Vec::new();
         }
 
-        let mut macros = self.creader.read_macros(vi);
+        let mut macros = self.read_macros(vi);
         let mut ret = Vec::new();
         let mut seen = HashSet::new();