Auto merge of #65433 - Centril:rollup-rzvry15, r=Centril

Rollup of 4 pull requests

Successful merges:

 - #64035 (Stabilize proc macros generating `macro_rules` items)
 - #65376 (syntax: misc extractions)
 - #65426 (Remove custom `PartialEq` impls for `LocalInternedString`.)
 - #65428 (Refactor: Rename `db` locals to `diag`)

Failed merges:

r? @ghost

Author: bors

src/librustc/hir/lowering.rs

@@ -67,11 +67,11 @@ use syntax::errors;
 use syntax::ext::base::SpecialDerives;
 use syntax::ext::hygiene::ExpnId;
 use syntax::print::pprust;
-use syntax::source_map::{respan, ExpnData, ExpnKind, DesugaringKind, Spanned};
-use syntax::symbol::{kw, sym, Symbol};
 use syntax::tokenstream::{TokenStream, TokenTree};
 use syntax::parse::token::{self, Nonterminal, Token};
-use syntax::parse::ParseSess;
+use syntax::sess::ParseSess;
+use syntax::source_map::{respan, ExpnData, ExpnKind, DesugaringKind, Spanned};
+use syntax::symbol::{kw, sym, Symbol};
 use syntax::visit::{self, Visitor};
 use syntax_pos::Span;
 

src/librustc/hir/print.rs

@@ -1,10 +1,10 @@
 use rustc_target::spec::abi::Abi;
 use syntax::ast;
 use syntax::source_map::{SourceMap, Spanned};
-use syntax::parse::ParseSess;
 use syntax::print::pp::{self, Breaks};
 use syntax::print::pp::Breaks::{Consistent, Inconsistent};
 use syntax::print::pprust::{self, Comments, PrintState};
+use syntax::sess::ParseSess;
 use syntax::symbol::kw;
 use syntax::util::parser::{self, AssocOp, Fixity};
 use syntax_pos::{self, BytePos, FileName};

src/librustc/lib.rs

@@ -56,7 +56,7 @@
 #![feature(test)]
 #![feature(in_band_lifetimes)]
 #![feature(crate_visibility_modifier)]
-#![feature(proc_macro_hygiene)]
+#![cfg_attr(bootstrap, feature(proc_macro_hygiene))]
 #![feature(log_syntax)]
 #![feature(associated_type_bounds)]
 #![feature(rustc_attrs)]

src/librustc/session/config.rs

@@ -16,8 +16,9 @@ use syntax;
 use syntax::ast::{self, IntTy, UintTy, MetaItemKind};
 use syntax::source_map::{FileName, FilePathMapping};
 use syntax::edition::{Edition, EDITION_NAME_LIST, DEFAULT_EDITION};
-use syntax::parse::{ParseSess, new_parser_from_source_str};
+use syntax::parse::new_parser_from_source_str;
 use syntax::parse::token;
+use syntax::sess::ParseSess;
 use syntax::symbol::{sym, Symbol};
 use syntax::feature_gate::UnstableFeatures;
 use syntax::source_map::SourceMap;

src/librustc/session/mod.rs

@@ -28,7 +28,7 @@ use syntax::ext::allocator::AllocatorKind;
 use syntax::feature_gate::{self, AttributeType};
 use syntax::json::JsonEmitter;
 use syntax::source_map;
-use syntax::parse::{self, ParseSess};
+use syntax::sess::ParseSess;
 use syntax::symbol::Symbol;
 use syntax_pos::{MultiSpan, Span};
 use crate::util::profiling::{SelfProfiler, SelfProfilerRef};
@@ -1159,7 +1159,7 @@ fn build_session_(
     );
     let target_cfg = config::build_target_config(&sopts, &span_diagnostic);
 
-    let parse_sess = parse::ParseSess::with_span_handler(
+    let parse_sess = ParseSess::with_span_handler(
         span_diagnostic,
         source_map,
     );

src/librustc_codegen_ssa/back/write.rs

@@ -1667,13 +1667,13 @@ impl SharedEmitter {
 }
 
 impl Emitter for SharedEmitter {
-    fn emit_diagnostic(&mut self, db: &rustc_errors::Diagnostic) {
+    fn emit_diagnostic(&mut self, diag: &rustc_errors::Diagnostic) {
         drop(self.sender.send(SharedEmitterMessage::Diagnostic(Diagnostic {
-            msg: db.message(),
-            code: db.code.clone(),
-            lvl: db.level,
+            msg: diag.message(),
+            code: diag.code.clone(),
+            lvl: diag.level,
         })));
-        for child in &db.children {
+        for child in &diag.children {
             drop(self.sender.send(SharedEmitterMessage::Diagnostic(Diagnostic {
                 msg: child.message(),
                 code: None,

src/librustc_errors/annotate_snippet_emitter_writer.rs

@@ -31,19 +31,19 @@ pub struct AnnotateSnippetEmitterWriter {
 
 impl Emitter for AnnotateSnippetEmitterWriter {
     /// The entry point for the diagnostics generation
-    fn emit_diagnostic(&mut self, db: &Diagnostic) {
-        let mut children = db.children.clone();
-        let (mut primary_span, suggestions) = self.primary_span_formatted(&db);
+    fn emit_diagnostic(&mut self, diag: &Diagnostic) {
+        let mut children = diag.children.clone();
+        let (mut primary_span, suggestions) = self.primary_span_formatted(&diag);
 
         self.fix_multispans_in_std_macros(&self.source_map,
                                           &mut primary_span,
                                           &mut children,
-                                          &db.level,
+                                          &diag.level,
                                           self.external_macro_backtrace);
 
-        self.emit_messages_default(&db.level,
-                                   db.message(),
-                                   &db.code,
+        self.emit_messages_default(&diag.level,
+                                   diag.message(),
+                                   &diag.code,
                                    &primary_span,
                                    &children,
                                    &suggestions);

src/librustc_errors/emitter.rs

@@ -180,7 +180,7 @@ const ANONYMIZED_LINE_NUM: &str = "LL";
 /// Emitter trait for emitting errors.
 pub trait Emitter {
     /// Emit a structured diagnostic.
-    fn emit_diagnostic(&mut self, db: &Diagnostic);
+    fn emit_diagnostic(&mut self, diag: &Diagnostic);
 
     /// Emit a notification that an artifact has been output.
     /// This is currently only supported for the JSON format,
@@ -206,10 +206,10 @@ pub trait Emitter {
     ///   we return the original `primary_span` and the original suggestions.
     fn primary_span_formatted<'a>(
         &mut self,
-        db: &'a Diagnostic,
+        diag: &'a Diagnostic,
     ) -> (MultiSpan, &'a [CodeSuggestion]) {
-        let mut primary_span = db.span.clone();
-        if let Some((sugg, rest)) = db.suggestions.split_first() {
+        let mut primary_span = diag.span.clone();
+        if let Some((sugg, rest)) = diag.suggestions.split_first() {
             if rest.is_empty() &&
                // ^ if there is only one suggestion
                // don't display multi-suggestions as labels
@@ -260,10 +260,10 @@ pub trait Emitter {
                 // to be consistent. We could try to figure out if we can
                 // make one (or the first one) inline, but that would give
                 // undue importance to a semi-random suggestion
-                (primary_span, &db.suggestions)
+                (primary_span, &diag.suggestions)
             }
         } else {
-            (primary_span, &db.suggestions)
+            (primary_span, &diag.suggestions)
         }
     }
 
@@ -401,19 +401,19 @@ impl Emitter for EmitterWriter {
         self.sm.as_ref()
     }
 
-    fn emit_diagnostic(&mut self, db: &Diagnostic) {
-        let mut children = db.children.clone();
-        let (mut primary_span, suggestions) = self.primary_span_formatted(&db);
+    fn emit_diagnostic(&mut self, diag: &Diagnostic) {
+        let mut children = diag.children.clone();
+        let (mut primary_span, suggestions) = self.primary_span_formatted(&diag);
 
         self.fix_multispans_in_std_macros(&self.sm,
                                           &mut primary_span,
                                           &mut children,
-                                          &db.level,
+                                          &diag.level,
                                           self.external_macro_backtrace);
 
-        self.emit_messages_default(&db.level,
-                                   &db.styled_message(),
-                                   &db.code,
+        self.emit_messages_default(&diag.level,
+                                   &diag.styled_message(),
+                                   &diag.code,
                                    &primary_span,
                                    &children,
                                    &suggestions);

src/librustdoc/clean/cfg.rs

@@ -9,7 +9,7 @@ use std::ops;
 
 use syntax::symbol::{Symbol, sym};
 use syntax::ast::{MetaItem, MetaItemKind, NestedMetaItem, LitKind};
-use syntax::parse::ParseSess;
+use syntax::sess::ParseSess;
 use syntax::feature_gate::Features;
 
 use syntax_pos::Span;

src/librustdoc/html/highlight.rs

@@ -14,7 +14,7 @@ use std::io::prelude::*;
 use syntax::source_map::{SourceMap, FilePathMapping};
 use syntax::parse::lexer;
 use syntax::parse::token::{self, Token};
-use syntax::parse;
+use syntax::sess::ParseSess;
 use syntax::symbol::{kw, sym};
 use syntax_pos::{Span, FileName};
 
@@ -33,7 +33,7 @@ pub fn render_with_highlighting(
                class, tooltip).unwrap();
     }
 
-    let sess = parse::ParseSess::new(FilePathMapping::empty());
+    let sess = ParseSess::new(FilePathMapping::empty());
     let fm = sess.source_map().new_source_file(
         FileName::Custom(String::from("rustdoc-highlighting")),
         src.to_owned(),