Auto merge of #69592 - petrochenkov:nosyntax, r=Centril

Rename `libsyntax` to `librustc_ast`

This was the last rustc crate that wasn't following the `rustc_*` naming convention.

Follow-up to #67763.

Author: bors

Cargo.lock

@@ -996,7 +996,7 @@ impl Step for Src {
             "src/tools/rustc-std-workspace-alloc",
             "src/tools/rustc-std-workspace-std",
             "src/librustc",
-            "src/libsyntax",
+            "src/librustc_ast",
         ];
 
         copy_src_dirs(builder, &std_src_dirs[..], &[], &dst_src);

src/bootstrap/dist.rs

@@ -62,7 +62,7 @@ for details on how to format and write long error codes.
 * All of them are accessible [online](http://doc.rust-lang.org/error-index.html),
   which are auto-generated from rustc source code in different places:
   [librustc](https://github.com/rust-lang/rust/blob/master/src/librustc/error_codes.rs),
-  [libsyntax](https://github.com/rust-lang/rust/blob/master/src/libsyntax/error_codes.rs),
+  [librustc_ast](https://github.com/rust-lang/rust/blob/master/src/librustc_ast/error_codes.rs),
   [librustc_borrowck](https://github.com/rust-lang/rust/blob/master/src/librustc_borrowck/error_codes.rs),
   [librustc_metadata](https://github.com/rust-lang/rust/blob/master/src/librustc_metadata/error_codes.rs),
   [librustc_mir](https://github.com/rust-lang/rust/blob/master/src/librustc_mir/error_codes.rs),

src/doc/rustc-ux-guidelines.md

@@ -23,7 +23,7 @@ mechanics of defining and loading a plugin.
 
 In the vast majority of cases, a plugin should *only* be used through
 `#![plugin]` and not through an `extern crate` item.  Linking a plugin would
-pull in all of libsyntax and librustc as dependencies of your crate.  This is
+pull in all of librustc_ast and librustc as dependencies of your crate.  This is
 generally unwanted unless you are building another plugin.
 
 The usual practice is to put compiler plugins in their own crate, separate from
@@ -42,7 +42,7 @@ that warns about any item named `lintme`.
 #![feature(plugin_registrar)]
 #![feature(box_syntax, rustc_private)]
 
-extern crate syntax;
+extern crate rustc_ast;
 
 // Load rustc as a plugin to get macros
 #[macro_use]
@@ -52,7 +52,7 @@ extern crate rustc_driver;
 use rustc::lint::{EarlyContext, LintContext, LintPass, EarlyLintPass,
                   EarlyLintPassObject, LintArray};
 use rustc_driver::plugin::Registry;
-use syntax::ast;
+use rustc_ast::ast;
 
 declare_lint!(TEST_LINT, Warn, "Warn about items named 'lintme'");
 

src/doc/unstable-book/src/language-features/plugin.md

@@ -28,7 +28,7 @@ rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_errors = { path = "../librustc_errors" }
 rustc_index = { path = "../librustc_index" }
 rustc_serialize = { path = "../libserialize", package = "serialize" }
-syntax = { path = "../libsyntax" }
+rustc_ast = { path = "../librustc_ast" }
 rustc_span = { path = "../librustc_span" }
 backtrace = "0.3.40"
 parking_lot = "0.9"

src/librustc/Cargo.toml

@@ -131,7 +131,7 @@ macro_rules! arena_types {
             // HIR types
             [few] hir_krate: rustc_hir::Crate<$tcx>,
             [] arm: rustc_hir::Arm<$tcx>,
-            [] attribute: syntax::ast::Attribute,
+            [] attribute: rustc_ast::ast::Attribute,
             [] block: rustc_hir::Block<$tcx>,
             [] bare_fn_ty: rustc_hir::BareFnTy<$tcx>,
             [few] global_asm: rustc_hir::GlobalAsm,

src/librustc/arena.rs

@@ -2,9 +2,9 @@
 
 use crate::ty::TyCtxt;
 
+use rustc_ast::ast::NodeId;
 use rustc_hir::def_id::DefId;
 use rustc_hir::BodyId;
-use syntax::ast::NodeId;
 
 /// The `DepGraphSafe` trait is used to specify what kinds of values
 /// are safe to "leak" into a task. The idea is that this should be

src/librustc/dep_graph/safe.rs

@@ -1,10 +1,10 @@
 use crate::ty;
 
+use rustc_ast::ast;
 use rustc_hir::def::Res;
 use rustc_hir::def_id::DefIdMap;
 use rustc_macros::HashStable;
 use rustc_span::Span;
-use syntax::ast;
 
 use std::fmt::Debug;
 

src/librustc/hir/exports.rs

@@ -12,11 +12,11 @@
 //! for the `Code` associated with a particular NodeId.
 
 use crate::hir::map::Map;
+use rustc_ast::ast::{Attribute, Ident};
 use rustc_hir as hir;
 use rustc_hir::intravisit::FnKind;
 use rustc_hir::{Expr, FnDecl, Node};
 use rustc_span::Span;
-use syntax::ast::{Attribute, Ident};
 
 /// An FnLikeNode is a Node that is like a fn, in that it has a decl
 /// and a body (as well as a NodeId, a span, etc).

src/librustc/hir/map/blocks.rs

@@ -3,6 +3,7 @@ use crate::hir::map::definitions::{self, DefPathHash};
 use crate::hir::map::{Entry, HirEntryMap, Map};
 use crate::ich::StableHashingContext;
 use crate::middle::cstore::CrateStore;
+use rustc_ast::ast::NodeId;
 use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
@@ -16,7 +17,6 @@ use rustc_index::vec::IndexVec;
 use rustc_session::{CrateDisambiguator, Session};
 use rustc_span::source_map::SourceMap;
 use rustc_span::{Span, Symbol, DUMMY_SP};
-use syntax::ast::NodeId;
 
 use std::iter::repeat;