Rollup merge of #73813 - petrochenkov:restrait, r=davidtwco

Rename two `Resolver` traits

`trait Resolver` -> `trait ResolverExpand` for the resolver interface available from expansion.
`trait Resolver` -> `trait ResolverAstLowering` for the resolver interface available from AST lowering.

Addresses https://github.com/rust-lang/rust/pull/73587#discussion_r443242556

src/librustc_ast_lowering/lib.rs

@@ -91,7 +91,7 @@ struct LoweringContext<'a, 'hir: 'a> {
     /// Used to assign IDs to HIR nodes that do not directly correspond to AST nodes.
     sess: &'a Session,
 
-    resolver: &'a mut dyn Resolver,
+    resolver: &'a mut dyn ResolverAstLowering,
 
     /// HACK(Centril): there is a cyclic dependency between the parser and lowering
     /// if we don't have this function pointer. To avoid that dependency so that
@@ -172,7 +172,7 @@ struct LoweringContext<'a, 'hir: 'a> {
     allow_gen_future: Option<Lrc<[Symbol]>>,
 }
 
-pub trait Resolver {
+pub trait ResolverAstLowering {
     fn def_key(&mut self, id: DefId) -> DefKey;
 
     fn item_generics_num_lifetimes(&self, def: DefId, sess: &Session) -> usize;
@@ -299,7 +299,7 @@ fn reborrow<'this>(&'this mut self) -> ImplTraitContext<'this, 'a> {
 pub fn lower_crate<'a, 'hir>(
     sess: &'a Session,
     krate: &'a Crate,
-    resolver: &'a mut dyn Resolver,
+    resolver: &'a mut dyn ResolverAstLowering,
     nt_to_tokenstream: NtToTokenstream,
     arena: &'hir Arena<'hir>,
 ) -> hir::Crate<'hir> {

src/librustc_builtin_macros/lib.rs

@@ -15,7 +15,7 @@
 
 use crate::deriving::*;
 
-use rustc_expand::base::{MacroExpanderFn, Resolver, SyntaxExtension, SyntaxExtensionKind};
+use rustc_expand::base::{MacroExpanderFn, ResolverExpand, SyntaxExtension, SyntaxExtensionKind};
 use rustc_expand::proc_macro::BangProcMacro;
 use rustc_span::edition::Edition;
 use rustc_span::symbol::{sym, Ident};
@@ -45,7 +45,7 @@
 pub mod standard_library_imports;
 pub mod test_harness;
 
-pub fn register_builtin_macros(resolver: &mut dyn Resolver, edition: Edition) {
+pub fn register_builtin_macros(resolver: &mut dyn ResolverExpand, edition: Edition) {
     let mut register = |name, kind| {
         resolver.register_builtin_macro(
             Ident::with_dummy_span(name),

src/librustc_builtin_macros/proc_macro_harness.rs

@@ -6,7 +6,7 @@
 use rustc_ast::ptr::P;
 use rustc_ast::visit::{self, Visitor};
 use rustc_ast_pretty::pprust;
-use rustc_expand::base::{ExtCtxt, Resolver};
+use rustc_expand::base::{ExtCtxt, ResolverExpand};
 use rustc_expand::expand::{AstFragment, ExpansionConfig};
 use rustc_session::parse::ParseSess;
 use rustc_span::hygiene::AstPass;
@@ -52,7 +52,7 @@ struct CollectProcMacros<'a> {
 
 pub fn inject(
     sess: &ParseSess,
-    resolver: &mut dyn Resolver,
+    resolver: &mut dyn ResolverExpand,
     mut krate: ast::Crate,
     is_proc_macro_crate: bool,
     has_proc_macro_decls: bool,

src/librustc_builtin_macros/standard_library_imports.rs

@@ -1,6 +1,6 @@
 use rustc_ast::ptr::P;
 use rustc_ast::{ast, attr};
-use rustc_expand::base::{ExtCtxt, Resolver};
+use rustc_expand::base::{ExtCtxt, ResolverExpand};
 use rustc_expand::expand::ExpansionConfig;
 use rustc_session::parse::ParseSess;
 use rustc_span::edition::Edition;
@@ -10,7 +10,7 @@
 
 pub fn inject(
     mut krate: ast::Crate,
-    resolver: &mut dyn Resolver,
+    resolver: &mut dyn ResolverExpand,
     sess: &ParseSess,
     alt_std_name: Option<Symbol>,
 ) -> (ast::Crate, Option<Symbol>) {

src/librustc_builtin_macros/test_harness.rs

@@ -6,7 +6,7 @@
 use rustc_ast::entry::{self, EntryPointType};
 use rustc_ast::mut_visit::{ExpectOne, *};
 use rustc_ast::ptr::P;
-use rustc_expand::base::{ExtCtxt, Resolver};
+use rustc_expand::base::{ExtCtxt, ResolverExpand};
 use rustc_expand::expand::{AstFragment, ExpansionConfig};
 use rustc_feature::Features;
 use rustc_session::parse::ParseSess;
@@ -37,7 +37,7 @@ struct TestCtxt<'a> {
 // existing main functions, and synthesizing a main test harness
 pub fn inject(
     sess: &ParseSess,
-    resolver: &mut dyn Resolver,
+    resolver: &mut dyn ResolverExpand,
     should_test: bool,
     krate: &mut ast::Crate,
     span_diagnostic: &rustc_errors::Handler,
@@ -192,7 +192,7 @@ fn visit_mac(&mut self, _mac: &mut ast::MacCall) {
 /// Crawl over the crate, inserting test reexports and the test main function
 fn generate_test_harness(
     sess: &ParseSess,
-    resolver: &mut dyn Resolver,
+    resolver: &mut dyn ResolverExpand,
     reexport_test_harness_main: Option<Symbol>,
     krate: &mut ast::Crate,
     features: &Features,

src/librustc_expand/base.rs

@@ -889,7 +889,7 @@ pub enum InvocationRes {
 /// Error type that denotes indeterminacy.
 pub struct Indeterminate;
 
-pub trait Resolver {
+pub trait ResolverExpand {
     fn next_node_id(&mut self) -> NodeId;
 
     fn resolve_dollar_crates(&mut self);
@@ -946,7 +946,7 @@ pub struct ExtCtxt<'a> {
     pub ecfg: expand::ExpansionConfig<'a>,
     pub reduced_recursion_limit: Option<Limit>,
     pub root_path: PathBuf,
-    pub resolver: &'a mut dyn Resolver,
+    pub resolver: &'a mut dyn ResolverExpand,
     pub current_expansion: ExpansionData,
     pub expansions: FxHashMap<Span, Vec<String>>,
     /// Called directly after having parsed an external `mod foo;` in expansion.
@@ -957,7 +957,7 @@ impl<'a> ExtCtxt<'a> {
     pub fn new(
         parse_sess: &'a ParseSess,
         ecfg: expand::ExpansionConfig<'a>,
-        resolver: &'a mut dyn Resolver,
+        resolver: &'a mut dyn ResolverExpand,
         extern_mod_loaded: Option<&'a dyn Fn(&ast::Crate)>,
     ) -> ExtCtxt<'a> {
         ExtCtxt {

src/librustc_resolve/build_reduced_graph.rs

@@ -19,7 +19,7 @@
 use rustc_ast::ast::{AssocItem, AssocItemKind, MetaItemKind, StmtKind};
 use rustc_ast::token::{self, Token};
 use rustc_ast::visit::{self, AssocCtxt, Visitor};
-use rustc_ast_lowering::Resolver as ResolverAstLowering;
+use rustc_ast_lowering::ResolverAstLowering;
 use rustc_attr as attr;
 use rustc_data_structures::sync::Lrc;
 use rustc_errors::{struct_span_err, Applicability};

src/librustc_resolve/check_unused.rs

@@ -29,7 +29,7 @@
 use rustc_ast::ast;
 use rustc_ast::node_id::NodeMap;
 use rustc_ast::visit::{self, Visitor};
-use rustc_ast_lowering::Resolver as ResolverAstLowering;
+use rustc_ast_lowering::ResolverAstLowering;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_errors::pluralize;
 use rustc_middle::ty;

src/librustc_resolve/def_collector.rs

@@ -4,7 +4,7 @@
 use rustc_ast::token::{self, Token};
 use rustc_ast::visit::{self, FnKind};
 use rustc_ast::walk_list;
-use rustc_ast_lowering::Resolver as ResolverAstLowering;
+use rustc_ast_lowering::ResolverAstLowering;
 use rustc_expand::expand::AstFragment;
 use rustc_hir::def_id::LocalDefId;
 use rustc_hir::definitions::*;

src/librustc_resolve/imports.rs

@@ -12,7 +12,7 @@
 use rustc_ast::ast::NodeId;
 use rustc_ast::unwrap_or;
 use rustc_ast::util::lev_distance::find_best_match_for_name;
-use rustc_ast_lowering::Resolver as ResolverAstLowering;
+use rustc_ast_lowering::ResolverAstLowering;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_data_structures::ptr_key::PtrKey;
 use rustc_errors::{pluralize, struct_span_err, Applicability};

src/librustc_resolve/late.rs

@@ -16,7 +16,7 @@
 use rustc_ast::util::lev_distance::find_best_match_for_name;
 use rustc_ast::visit::{self, AssocCtxt, FnCtxt, FnKind, Visitor};
 use rustc_ast::{unwrap_or, walk_list};
-use rustc_ast_lowering::Resolver as ResolverAstLowering;
+use rustc_ast_lowering::ResolverAstLowering;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_errors::DiagnosticId;
 use rustc_hir::def::Namespace::{self, *};

src/librustc_resolve/lib.rs

@@ -27,7 +27,7 @@
 use rustc_ast::node_id::NodeMap;
 use rustc_ast::unwrap_or;
 use rustc_ast::visit::{self, Visitor};
-use rustc_ast_lowering::Resolver as ResolverAstLowering;
+use rustc_ast_lowering::ResolverAstLowering;
 use rustc_ast_pretty::pprust;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap};
 use rustc_data_structures::ptr_key::PtrKey;

src/librustc_resolve/macros.rs

@@ -7,12 +7,11 @@
 use crate::{CrateLint, ParentScope, ResolutionError, Resolver, Scope, ScopeSet, Weak};
 use crate::{ModuleKind, ModuleOrUniformRoot, NameBinding, PathResult, Segment, ToNameBinding};
 use rustc_ast::ast::{self, NodeId};
-use rustc_ast_lowering::Resolver as ResolverAstLowering;
+use rustc_ast_lowering::ResolverAstLowering;
 use rustc_ast_pretty::pprust;
 use rustc_attr::{self as attr, StabilityLevel};
 use rustc_data_structures::fx::FxHashSet;
-use rustc_expand::base::SyntaxExtension;
-use rustc_expand::base::{self, Indeterminate, InvocationRes};
+use rustc_expand::base::{Indeterminate, InvocationRes, ResolverExpand, SyntaxExtension};
 use rustc_expand::compile_declarative_macro;
 use rustc_expand::expand::{AstFragment, AstFragmentKind, Invocation, InvocationKind};
 use rustc_feature::is_builtin_attr_name;
@@ -141,7 +140,7 @@ fn registered_idents(
     (registered_attrs, registered_tools)
 }
 
-impl<'a> base::Resolver for Resolver<'a> {
+impl<'a> ResolverExpand for Resolver<'a> {
     fn next_node_id(&mut self) -> NodeId {
         self.next_node_id()
     }