Store concrete crate stores where possible

Author: Mark-Simulacrum

src/Cargo.lock

@@ -2451,6 +2451,7 @@ dependencies = [
  "rustc 0.0.0",
  "rustc_data_structures 0.0.0",
  "rustc_errors 0.0.0",
+ "rustc_metadata 0.0.0",
  "syntax 0.0.0",
  "syntax_pos 0.0.0",
 ]

src/librustc/middle/cstore.rs

@@ -25,7 +25,7 @@
 use hir::def;
 use hir::def_id::{CrateNum, DefId, LOCAL_CRATE};
 use hir::map as hir_map;
-use hir::map::definitions::{Definitions, DefKey, DefPathTable};
+use hir::map::definitions::{DefKey, DefPathTable};
 use hir::svh::Svh;
 use ty::{self, TyCtxt};
 use session::{Session, CrateDisambiguator};
@@ -259,26 +259,6 @@ pub trait CrateStore {
 
 pub type CrateStoreDyn = dyn CrateStore + sync::Sync;
 
-pub trait CrateLoader {
-    fn process_extern_crate(&mut self, item: &ast::Item, defs: &Definitions) -> CrateNum;
-
-    fn process_path_extern(
-        &mut self,
-        name: Symbol,
-        span: Span,
-    ) -> CrateNum;
-
-    fn process_use_extern(
-        &mut self,
-        name: Symbol,
-        span: Span,
-        id: ast::NodeId,
-        defs: &Definitions,
-    ) -> CrateNum;
-
-    fn postprocess(&mut self, krate: &ast::Crate);
-}
-
 // This method is used when generating the command line to pass through to
 // system linker. The linker expects undefined symbols on the left of the
 // command line to be defined in libraries on the right, not the other way

src/librustc_driver/driver.rs

@@ -20,7 +20,6 @@ use rustc::session::config::{self, Input, OutputFilenames, OutputType};
 use rustc::session::search_paths::PathKind;
 use rustc::lint;
 use rustc::middle::{self, reachable, resolve_lifetime, stability};
-use rustc::middle::cstore::CrateStoreDyn;
 use rustc::middle::privacy::AccessLevels;
 use rustc::ty::{self, AllArenas, Resolutions, TyCtxt};
 use rustc::traits;
@@ -484,7 +483,7 @@ impl<'a> ::CompilerCalls<'a> for CompileController<'a> {
         codegen_backend: &dyn (::CodegenBackend),
         matches: &::getopts::Matches,
         sess: &Session,
-        cstore: &dyn (::CrateStore),
+        cstore: &CStore,
         input: &Input,
         odir: &Option<PathBuf>,
         ofile: &Option<PathBuf>,
@@ -728,9 +727,9 @@ pub struct ExpansionResult {
     pub hir_forest: hir_map::Forest,
 }
 
-pub struct InnerExpansionResult<'a> {
+pub struct InnerExpansionResult<'a, 'b: 'a> {
     pub expanded_crate: ast::Crate,
-    pub resolver: Resolver<'a>,
+    pub resolver: Resolver<'a, 'b>,
     pub hir_forest: hir_map::Forest,
 }
 
@@ -806,7 +805,7 @@ where
 
 /// Same as phase_2_configure_and_expand, but doesn't let you keep the resolver
 /// around
-pub fn phase_2_configure_and_expand_inner<'a, F>(
+pub fn phase_2_configure_and_expand_inner<'a, 'b: 'a, F>(
     sess: &'a Session,
     cstore: &'a CStore,
     mut krate: ast::Crate,
@@ -815,9 +814,9 @@ pub fn phase_2_configure_and_expand_inner<'a, F>(
     addl_plugins: Option<Vec<String>>,
     make_glob_map: MakeGlobMap,
     resolver_arenas: &'a ResolverArenas<'a>,
-    crate_loader: &'a mut CrateLoader,
+    crate_loader: &'a mut CrateLoader<'b>,
     after_expand: F,
-) -> Result<InnerExpansionResult<'a>, CompileIncomplete>
+) -> Result<InnerExpansionResult<'a, 'b>, CompileIncomplete>
 where
     F: FnOnce(&ast::Crate) -> CompileResult,
 {
@@ -1209,7 +1208,7 @@ pub fn phase_3_run_analysis_passes<'tcx, F, R>(
     codegen_backend: &dyn CodegenBackend,
     control: &CompileController,
     sess: &'tcx Session,
-    cstore: &'tcx CrateStoreDyn,
+    cstore: &'tcx CStore,
     hir_map: hir_map::Map<'tcx>,
     mut analysis: ty::CrateAnalysis,
     resolutions: Resolutions,

src/librustc_driver/lib.rs

@@ -676,7 +676,7 @@ pub trait CompilerCalls<'a> {
                      _: &dyn CodegenBackend,
                      _: &getopts::Matches,
                      _: &Session,
-                     _: &dyn CrateStore,
+                     _: &CStore,
                      _: &Input,
                      _: &Option<PathBuf>,
                      _: &Option<PathBuf>)
@@ -884,7 +884,7 @@ impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
                      codegen_backend: &dyn CodegenBackend,
                      matches: &getopts::Matches,
                      sess: &Session,
-                     cstore: &dyn CrateStore,
+                     cstore: &CStore,
                      input: &Input,
                      odir: &Option<PathBuf>,
                      ofile: &Option<PathBuf>)
@@ -990,7 +990,7 @@ pub fn enable_save_analysis(control: &mut CompileController) {
 
 impl RustcDefaultCalls {
     pub fn list_metadata(sess: &Session,
-                         cstore: &dyn CrateStore,
+                         cstore: &CStore,
                          matches: &getopts::Matches,
                          input: &Input)
                          -> Compilation {

src/librustc_driver/pretty.rs

@@ -20,11 +20,11 @@ use {abort_on_err, driver};
 use rustc::ty::{self, TyCtxt, Resolutions, AllArenas};
 use rustc::cfg;
 use rustc::cfg::graphviz::LabelledCFG;
-use rustc::middle::cstore::CrateStoreDyn;
 use rustc::session::Session;
 use rustc::session::config::{Input, OutputFilenames};
 use rustc_borrowck as borrowck;
 use rustc_borrowck::graphviz as borrowck_dot;
+use rustc_metadata::cstore::CStore;
 
 use rustc_mir::util::{write_mir_pretty, write_mir_graphviz};
 
@@ -199,7 +199,7 @@ impl PpSourceMode {
     }
     fn call_with_pp_support_hir<'tcx, A, F>(&self,
                                                sess: &'tcx Session,
-                                               cstore: &'tcx CrateStoreDyn,
+                                               cstore: &'tcx CStore,
                                                hir_map: &hir_map::Map<'tcx>,
                                                analysis: &ty::CrateAnalysis,
                                                resolutions: &Resolutions,
@@ -918,7 +918,7 @@ pub fn print_after_parsing(sess: &Session,
 }
 
 pub fn print_after_hir_lowering<'tcx, 'a: 'tcx>(sess: &'a Session,
-                                                cstore: &'tcx CrateStoreDyn,
+                                                cstore: &'tcx CStore,
                                                 hir_map: &hir_map::Map<'tcx>,
                                                 analysis: &ty::CrateAnalysis,
                                                 resolutions: &Resolutions,
@@ -1074,7 +1074,7 @@ pub fn print_after_hir_lowering<'tcx, 'a: 'tcx>(sess: &'a Session,
 // with a different callback than the standard driver, so that isn't easy.
 // Instead, we call that function ourselves.
 fn print_with_analysis<'tcx, 'a: 'tcx>(sess: &'a Session,
-                                       cstore: &'a CrateStoreDyn,
+                                       cstore: &'a CStore,
                                        hir_map: &hir_map::Map<'tcx>,
                                        analysis: &ty::CrateAnalysis,
                                        resolutions: &Resolutions,

src/librustc_metadata/creader.rs

@@ -24,7 +24,6 @@ use rustc::session::{Session, CrateDisambiguator};
 use rustc::session::config::{Sanitizer, self};
 use rustc_target::spec::{PanicStrategy, TargetTriple};
 use rustc::session::search_paths::PathKind;
-use rustc::middle;
 use rustc::middle::cstore::{ExternCrate, ExternCrateSource};
 use rustc::util::common::record_time;
 use rustc::util::nodemap::FxHashSet;
@@ -1058,8 +1057,8 @@ impl<'a> CrateLoader<'a> {
     }
 }
 
-impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
-    fn postprocess(&mut self, krate: &ast::Crate) {
+impl<'a> CrateLoader<'a> {
+    pub fn postprocess(&mut self, krate: &ast::Crate) {
         // inject the sanitizer runtime before the allocator runtime because all
         // sanitizers force the use of the `alloc_system` allocator
         self.inject_sanitizer_runtime();
@@ -1072,7 +1071,9 @@ impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
         }
     }
 
-    fn process_extern_crate(&mut self, item: &ast::Item, definitions: &Definitions) -> CrateNum {
+    pub fn process_extern_crate(
+        &mut self, item: &ast::Item, definitions: &Definitions,
+    ) -> CrateNum {
         match item.node {
             ast::ItemKind::ExternCrate(orig_name) => {
                 debug!("resolving extern crate stmt. ident: {} orig_name: {:?}",
@@ -1115,7 +1116,7 @@ impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
         }
     }
 
-    fn process_path_extern(
+    pub fn process_path_extern(
         &mut self,
         name: Symbol,
         span: Span,
@@ -1139,7 +1140,7 @@ impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
         cnum
     }
 
-    fn process_use_extern(
+    pub fn process_use_extern(
         &mut self,
         name: Symbol,
         span: Span,

src/librustc_resolve/Cargo.toml

@@ -17,3 +17,4 @@ arena = { path = "../libarena" }
 rustc_errors = { path = "../librustc_errors" }
 syntax_pos = { path = "../libsyntax_pos" }
 rustc_data_structures = { path = "../librustc_data_structures" }
+rustc_metadata = { path = "../librustc_metadata" }

src/librustc_resolve/build_reduced_graph.rs

@@ -25,6 +25,7 @@ use rustc::middle::cstore::LoadedMacro;
 use rustc::hir::def::*;
 use rustc::hir::def_id::{BUILTIN_MACROS_CRATE, CRATE_DEF_INDEX, LOCAL_CRATE, DefId};
 use rustc::ty;
+use rustc::middle::cstore::CrateStore;
 
 use std::cell::Cell;
 use rustc_data_structures::sync::Lrc;
@@ -86,7 +87,7 @@ struct LegacyMacroImports {
     imports: Vec<(Name, Span)>,
 }
 
-impl<'a> Resolver<'a> {
+impl<'a, 'cl> Resolver<'a, 'cl> {
     /// Defines `name` in namespace `ns` of module `parent` to be `def` if it is not yet defined;
     /// otherwise, reports an error.
     pub fn define<T>(&mut self, parent: Module<'a>, ident: Ident, ns: Namespace, def: T)
@@ -776,13 +777,13 @@ impl<'a> Resolver<'a> {
     }
 }
 
-pub struct BuildReducedGraphVisitor<'a, 'b: 'a> {
-    pub resolver: &'a mut Resolver<'b>,
+pub struct BuildReducedGraphVisitor<'a, 'b: 'a, 'c: 'b> {
+    pub resolver: &'a mut Resolver<'b, 'c>,
     pub legacy_scope: LegacyScope<'b>,
     pub expansion: Mark,
 }
 
-impl<'a, 'b> BuildReducedGraphVisitor<'a, 'b> {
+impl<'a, 'b, 'cl> BuildReducedGraphVisitor<'a, 'b, 'cl> {
     fn visit_invoc(&mut self, id: ast::NodeId) -> &'b InvocationData<'b> {
         let mark = id.placeholder_to_mark();
         self.resolver.current_module.unresolved_invocations.borrow_mut().insert(mark);
@@ -806,7 +807,7 @@ macro_rules! method {
     }
 }
 
-impl<'a, 'b> Visitor<'a> for BuildReducedGraphVisitor<'a, 'b> {
+impl<'a, 'b, 'cl> Visitor<'a> for BuildReducedGraphVisitor<'a, 'b, 'cl> {
     method!(visit_impl_item: ast::ImplItem, ast::ImplItemKind::Macro, walk_impl_item);
     method!(visit_expr:      ast::Expr,     ast::ExprKind::Mac,       walk_expr);
     method!(visit_pat:       ast::Pat,      ast::PatKind::Mac,        walk_pat);

src/librustc_resolve/check_unused.rs

@@ -31,30 +31,30 @@ use syntax::visit::{self, Visitor};
 use syntax_pos::{Span, MultiSpan, DUMMY_SP};
 
 
-struct UnusedImportCheckVisitor<'a, 'b: 'a> {
-    resolver: &'a mut Resolver<'b>,
+struct UnusedImportCheckVisitor<'a, 'b: 'a, 'd: 'b> {
+    resolver: &'a mut Resolver<'b, 'd>,
     /// All the (so far) unused imports, grouped path list
     unused_imports: NodeMap<NodeMap<Span>>,
     base_id: ast::NodeId,
     item_span: Span,
 }
 
 // Deref and DerefMut impls allow treating UnusedImportCheckVisitor as Resolver.
-impl<'a, 'b> Deref for UnusedImportCheckVisitor<'a, 'b> {
-    type Target = Resolver<'b>;
+impl<'a, 'b, 'd> Deref for UnusedImportCheckVisitor<'a, 'b, 'd> {
+    type Target = Resolver<'b, 'd>;
 
-    fn deref<'c>(&'c self) -> &'c Resolver<'b> {
+    fn deref<'c>(&'c self) -> &'c Resolver<'b, 'd> {
         &*self.resolver
     }
 }
 
-impl<'a, 'b> DerefMut for UnusedImportCheckVisitor<'a, 'b> {
-    fn deref_mut<'c>(&'c mut self) -> &'c mut Resolver<'b> {
+impl<'a, 'b, 'd> DerefMut for UnusedImportCheckVisitor<'a, 'b, 'd> {
+    fn deref_mut<'c>(&'c mut self) -> &'c mut Resolver<'b, 'd> {
         &mut *self.resolver
     }
 }
 
-impl<'a, 'b> UnusedImportCheckVisitor<'a, 'b> {
+impl<'a, 'b, 'd> UnusedImportCheckVisitor<'a, 'b, 'd> {
     // We have information about whether `use` (import) directives are actually
     // used now. If an import is not used at all, we signal a lint error.
     fn check_import(&mut self, item_id: ast::NodeId, id: ast::NodeId, span: Span) {
@@ -77,7 +77,7 @@ impl<'a, 'b> UnusedImportCheckVisitor<'a, 'b> {
     }
 }
 
-impl<'a, 'b> Visitor<'a> for UnusedImportCheckVisitor<'a, 'b> {
+impl<'a, 'b, 'cl> Visitor<'a> for UnusedImportCheckVisitor<'a, 'b, 'cl> {
     fn visit_item(&mut self, item: &'a ast::Item) {
         self.item_span = item.span;