Fix compile errors of all the examples

examples/rustc-driver-example.rs

@@ -1,4 +1,4 @@
-// Tested with nightly-2025-02-13
+// Tested with nightly-2025-03-08
 
 #![feature(rustc_private)]
 
@@ -71,9 +71,8 @@ impl rustc_driver::Callbacks for MyCallbacks {
 
     fn after_analysis(&mut self, _compiler: &Compiler, tcx: TyCtxt<'_>) -> Compilation {
         // Analyze the program and inspect the types of definitions.
-        for id in tcx.hir().items() {
-            let hir = tcx.hir();
-            let item = hir.item(id);
+        for id in tcx.hir_free_items(){
+            let item = &tcx.hir_item(id);
             match item.kind {
                 rustc_hir::ItemKind::Static(_, _, _) | rustc_hir::ItemKind::Fn { .. } => {
                     let name = item.ident;

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

@@ -1,4 +1,4 @@
-// Tested with nightly-2025-02-13
+// Tested with nightly-2025-03-08
 
 #![feature(rustc_private)]
 
@@ -70,11 +70,9 @@ impl rustc_driver::Callbacks for MyCallbacks {
     }
 
     fn after_analysis(&mut self, _compiler: &Compiler, tcx: TyCtxt<'_>) -> Compilation {
-        // Every compilation contains a single crate.
-        let hir_krate = tcx.hir();
         // Iterate over the top-level items in the crate, looking for the main function.
-        for id in hir_krate.items() {
-            let item = hir_krate.item(id);
+        for id in tcx.hir_free_items(){
+            let item = &tcx.hir_item(id);
             // Use pattern-matching to find a specific node inside the main function.
             if let rustc_hir::ItemKind::Fn { body, .. } = item.kind {
                 let expr = &tcx.hir_body(body).value;

examples/rustc-interface-example.rs

@@ -1,4 +1,4 @@
-// Tested with nightly-2025-02-13
+// Tested with nightly-2025-03-08
 
 #![feature(rustc_private)]
 
@@ -64,9 +64,8 @@ fn main() {
         println!("{krate:?}");
         // Analyze the program and inspect the types of definitions.
         rustc_interface::create_and_enter_global_ctxt(&compiler, krate, |tcx| {
-            for id in tcx.hir().items() {
-                let hir = tcx.hir();
-                let item = hir.item(id);
+            for id in tcx.hir_free_items() {
+                let item = tcx.hir_item(id);
                 match item.kind {
                     rustc_hir::ItemKind::Static(_, _, _) | rustc_hir::ItemKind::Fn { .. } => {
                         let name = item.ident;

examples/rustc-interface-getting-diagnostics.rs

@@ -1,4 +1,4 @@
-// Tested with nightly-2025-02-13
+// Tested with nightly-2025-03-08
 
 #![feature(rustc_private)]
 
@@ -86,8 +86,10 @@ fn main() {
     rustc_interface::run_compiler(config, |compiler| {
         let krate = rustc_interface::passes::parse(&compiler.sess);
         rustc_interface::create_and_enter_global_ctxt(&compiler, krate, |tcx| {
-            // Run the analysis phase on the local crate to trigger the type error.
-            let _ = tcx.analysis(());
+            // Iterate all the items defined and perform type checking.
+            tcx.par_hir_body_owners(|item_def_id| {
+                tcx.ensure_ok().typeck(item_def_id);
+            });
         });
         // If the compiler has encountered errors when this closure returns, it will abort (!) the program.
         // We avoid this by resetting the error count before returning

src/rustc-driver/getting-diagnostics.md

@@ -7,7 +7,7 @@ otherwise be printed to stderr.
 
 To get diagnostics from the compiler,
 configure [`rustc_interface::Config`] to output diagnostic to a buffer,
-and run [`TyCtxt.analysis`].
+and run [`rustc_hir_typeck::typeck`] for each item.
 
 ```rust
 {{#include ../../examples/rustc-interface-getting-diagnostics.rs}}
@@ -16,3 +16,4 @@ and run [`TyCtxt.analysis`].
 [`rustc_interface`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/index.html
 [`rustc_interface::Config`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/interface/struct.Config.html
 [`TyCtxt.analysis`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/passes/fn.analysis.html
+[`rustc_hir_typeck::typeck`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir_typeck/fn.typeck.html