Update rustc-driver-*.rs examples (#1095)

Author: Undxxx

examples/rustc-driver-example.rs

@@ -3,6 +3,8 @@
 // NOTE: For the example to compile, you will need to first run the following:
 //   rustup component add rustc-dev
 
+// version: 1.53.0-nightly (9b0edb7fd 2021-03-27)
+
 extern crate rustc_error_codes;
 extern crate rustc_errors;
 extern crate rustc_hash;
@@ -46,8 +48,9 @@ fn main() {
         diagnostic_output: rustc_session::DiagnosticOutput::Default,
         // Set to capture stderr output during compiler execution
         stderr: None,                    // Option<Arc<Mutex<Vec<u8>>>>
-        crate_name: None,                // Option<String>
         lint_caps: FxHashMap::default(), // FxHashMap<lint::LintId, lint::Level>
+        // This is a callback from the driver that is called when [`ParseSess`] is created.
+        parse_sess_created: None, //Option<Box<dyn FnOnce(&mut ParseSess) + Send>>
         // This is a callback from the driver that is called when we're registering lints;
         // it is called during plugin registration when we have the LintStore in a non-shared state.
         //
@@ -61,6 +64,7 @@ fn main() {
         override_queries: None, // Option<fn(&Session, &mut ty::query::Providers<'_>, &mut ty::query::Providers<'_>)>
         // Registry of diagnostics codes.
         registry: registry::Registry::new(&rustc_error_codes::DIAGNOSTICS),
+        make_codegen_backend: None,
     };
     rustc_interface::run_compiler(config, |compiler| {
         compiler.enter(|queries| {
@@ -73,7 +77,7 @@ fn main() {
                     match item.kind {
                         rustc_hir::ItemKind::Static(_, _, _) | rustc_hir::ItemKind::Fn(_, _, _) => {
                             let name = item.ident;
-                            let ty = tcx.type_of(tcx.hir().local_def_id(item.hir_id));
+                            let ty = tcx.type_of(tcx.hir().local_def_id(item.hir_id()));
                             println!("{:?}:\t{:?}", name, ty)
                         }
                         _ => (),

examples/rustc-driver-getting-diagnostics.rs

@@ -3,6 +3,8 @@
 // NOTE: For the example to compile, you will need to first run the following:
 //   rustup component add rustc-dev
 
+// version: 1.53.0-nightly (9b0edb7fd 2021-03-27)
+
 extern crate rustc_error_codes;
 extern crate rustc_errors;
 extern crate rustc_hash;
@@ -68,11 +70,12 @@ fn main() {
         output_file: None,
         file_loader: None,
         stderr: None,
-        crate_name: None,
         lint_caps: rustc_hash::FxHashMap::default(),
+        parse_sess_created: None,
         register_lints: None,
         override_queries: None,
         registry: registry::Registry::new(&rustc_error_codes::DIAGNOSTICS),
+        make_codegen_backend: None,
     };
     rustc_interface::run_compiler(config, |compiler| {
         compiler.enter(|queries| {

examples/rustc-driver-interacting-with-the-ast.rs

@@ -3,6 +3,8 @@
 // NOTE: For the example to compile, you will need to first run the following:
 //     rustup component add rustc-dev llvm-tools-preview
 
+// version: 1.53.0-nightly (9b0edb7fd 2021-03-27)
+
 extern crate rustc_ast_pretty;
 extern crate rustc_error_codes;
 extern crate rustc_errors;
@@ -15,8 +17,6 @@ extern crate rustc_span;
 use rustc_ast_pretty::pprust::item_to_string;
 use rustc_errors::registry;
 use rustc_session::config;
-use rustc_session::config::PpMode::PpmSource;
-use rustc_session::config::PpSourceMode::PpmExpanded;
 use rustc_span::source_map;
 use std::path;
 use std::process;
@@ -46,8 +46,8 @@ fn main() {
         output_file: None,
         file_loader: None,
         stderr: None,
-        crate_name: None,
         lint_caps: rustc_hash::FxHashMap::default(),
+        parse_sess_created: None,
         register_lints: None,
         override_queries: None,
         make_codegen_backend: None,
@@ -57,8 +57,7 @@ fn main() {
         compiler.enter(|queries| {
             // TODO: add this to -Z unpretty
             let ast_krate = queries.parse().unwrap().take();
-            let ast_krate_mod = ast_krate.module;
-            for item in ast_krate_mod.items {
+            for item in ast_krate.items {
                 println!("{}", item_to_string(&item));
             }
 
@@ -75,7 +74,7 @@ fn main() {
                             if let rustc_hir::StmtKind::Local(local) = block.stmts[0].kind {
                                 if let Some(expr) = local.init {
                                     let hir_id = expr.hir_id; // hir_id identifies the string "Hello, world!"
-                                    let def_id = tcx.hir().local_def_id(item.hir_id); // def_id identifies the main function
+                                    let def_id = tcx.hir().local_def_id(item.hir_id()); // def_id identifies the main function
                                     let ty = tcx.typeck(def_id).node_type(hir_id);
                                     println!("{:?}: {:?}", expr, ty); // prints expr(HirId { owner: DefIndex(3), local_id: 4 }: "Hello, world!"): &'static str
                                 }