Move ParseSess to librustc_session

Author: Mark-Simulacrum

src/librustc_session/lib.rs

@@ -3,3 +3,4 @@ pub mod utils;
 #[macro_use]
 pub mod lint;
 pub mod node_id;
+pub mod parse;

src/libsyntax/sess.rs renamed to src/librustc_session/parse.rs

@@ -1,10 +1,10 @@
 //! Contains `ParseSess` which holds state living beyond what one `Parser` might.
 //! It also serves as an input to the parser itself.
 
-use crate::ast::{CrateConfig, NodeId};
-use crate::early_buffered_lints::BufferedEarlyLint;
+use crate::node_id::NodeId;
+use crate::lint::BufferedEarlyLint;
 
-use errors::{Applicability, emitter::SilentEmitter, Handler, ColorConfig, DiagnosticBuilder};
+use rustc_errors::{Applicability, emitter::SilentEmitter, Handler, ColorConfig, DiagnosticBuilder};
 use rustc_data_structures::fx::{FxHashSet, FxHashMap};
 use rustc_data_structures::sync::{Lrc, Lock, Once};
 use rustc_feature::UnstableFeatures;
@@ -16,6 +16,9 @@ use syntax_pos::source_map::{SourceMap, FilePathMapping};
 use std::path::PathBuf;
 use std::str;
 
+// Duplicated from syntax::ast for now
+type CrateConfig = FxHashSet<(Symbol, Option<Symbol>)>;
+
 /// Collected spans during parsing for places where a certain feature was
 /// used and should be feature gated accordingly in `check_crate`.
 #[derive(Default)]
@@ -137,7 +140,7 @@ impl ParseSess {
 
     pub fn buffer_lint(
         &self,
-        lint_id: &'static rustc_session::lint::Lint,
+        lint_id: &'static crate::lint::Lint,
         span: impl Into<MultiSpan>,
         id: NodeId,
         msg: &str,

src/libsyntax/lib.rs

@@ -102,7 +102,7 @@ pub mod ptr;
 pub mod show_span;
 pub use syntax_pos::edition;
 pub use syntax_pos::symbol;
-pub mod sess;
+pub use rustc_session::parse as sess;
 pub mod token;
 pub mod tokenstream;
 pub mod visit;