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Update rustc-driver related examples

This commit is contained in:
Yuki Okushi 2022-05-02 08:19:20 +09:00 committed by Tshepang Mbambo
parent f2a18eae27
commit 388142f167
6 changed files with 19 additions and 16 deletions
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7
examples/rustc-driver-example.rs
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@ -1,9 +1,9 @@
#![feature(rustc_private)]
// NOTE: For the example to compile, you will need to first run the following:
// rustup component add rustc-dev
// rustup component add rustc-dev llvm-tools-preview
// version: 1.61.0-nightly (68369a041 2022-02-22)
// version: 1.62.0-nightly (7c4b47696 2022-04-30)
extern crate rustc_error_codes;
extern crate rustc_errors;
@ -72,7 +72,8 @@ fn main() {
println!("{:#?}", parse);
// Analyze the program and inspect the types of definitions.
queries.global_ctxt().unwrap().take().enter(|tcx| {
for item in tcx.hir().items() {
for id in tcx.hir().items() {
let item = tcx.hir().item(id);
match item.kind {
rustc_hir::ItemKind::Static(_, _, _) | rustc_hir::ItemKind::Fn(_, _, _) => {
let name = item.ident;

4
examples/rustc-driver-getting-diagnostics.rs
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@ -1,9 +1,9 @@
#![feature(rustc_private)]
// NOTE: For the example to compile, you will need to first run the following:
// rustup component add rustc-dev
// rustup component add rustc-dev llvm-tools-preview
// version: 1.61.0-nightly (68369a041 2022-02-22)
// version: 1.62.0-nightly (7c4b47696 2022-04-30)
extern crate rustc_error_codes;
extern crate rustc_errors;

9
examples/rustc-driver-interacting-with-the-ast.rs
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@ -1,9 +1,9 @@
#![feature(rustc_private)]
// NOTE: For the example to compile, you will need to first run the following:
// rustup component add rustc-dev llvm-tools-preview
// rustup component add rustc-dev llvm-tools-preview
// version: 1.61.0-nightly (68369a041 2022-02-22)
// version: 1.62.0-nightly (7c4b47696 2022-04-30)
extern crate rustc_ast_pretty;
extern crate rustc_error_codes;
@ -66,7 +66,8 @@ fn main() {
// 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 item in hir_krate.items() {
for id in hir_krate.items() {
let item = hir_krate.item(id);
// Use pattern-matching to find a specific node inside the main function.
if let rustc_hir::ItemKind::Fn(_, _, body_id) = item.kind {
let expr = &tcx.hir().body(body_id).value;
@ -76,7 +77,7 @@ fn main() {
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 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
println!("{:?}: {:?}", expr, ty);
}
}
}

4
src/rustc-driver-getting-diagnostics.md
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@ -7,7 +7,7 @@
To get diagnostics from the compiler,
configure `rustc_interface::Config` to output diagnostic to a buffer,
and run `TyCtxt.analysis`. The following should be compiled
with <!-- date: 2021-03 --> `nightly-2021-03-28` (See [here][example]
with <!-- date: 2022-05 --> `nightly-2021-04-30` (See [here][example]
for the complete example):
[example]: https://github.com/rust-lang/rustc-dev-guide/blob/master/examples/rustc-driver-getting-diagnostics.rs
@ -35,7 +35,7 @@ rustc_interface::run_compiler(config, |compiler| {
compiler.enter(|queries| {
queries.global_ctxt().unwrap().take().enter(|tcx| {
// Run the analysis phase on the local crate to trigger the type error.
tcx.analysis(rustc_hir::def_id::LOCAL_CRATE);
let _ = tcx.analysis(());
});
});
});

9
src/rustc-driver-interacting-with-the-ast.md
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@ -5,7 +5,7 @@
## Getting the type of an expression
To get the type of an expression, use the `global_ctxt` to get a `TyCtxt`.
The following should be compiled with <!-- date: 2021-03 --> `nightly-2021-03-28`
The following should be compiled with <!-- date: 2022-05 --> `nightly-2022-04-30`
(see [here][example] for the complete example):
[example]: https://github.com/rust-lang/rustc-dev-guide/blob/master/examples/rustc-driver-interacting-with-the-ast.rs
@ -24,9 +24,10 @@ rustc_interface::run_compiler(config, |compiler| {
// Analyze the crate and inspect the types under the cursor.
queries.global_ctxt().unwrap().take().enter(|tcx| {
// Every compilation contains a single crate.
let hir_krate = tcx.hir().krate();
let hir_krate = tcx.hir();
// Iterate over the top-level items in the crate, looking for the main function.
for (_, item) in &hir_krate.items {
for id in hir_krate.items() {
let item = hir_krate.item(id);
// Use pattern-matching to find a specific node inside the main function.
if let rustc_hir::ItemKind::Fn(_, _, body_id) = item.kind {
let expr = &tcx.hir().body(body_id).value;
@ -36,7 +37,7 @@ rustc_interface::run_compiler(config, |compiler| {
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 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
println!("{:?}: {:?}", expr, ty);
}
}
}

2
src/rustc-driver.md
View File

@ -7,7 +7,7 @@ using the interface defined in the [`rustc_interface`] crate.
The `rustc_interface` crate provides external users with an (unstable) API
for running code at particular times during the compilation process, allowing
third parties to effectively use `rustc`'s internals as a library for
analysing a crate or emulating the compiler in-process (e.g. the RLS or rustdoc).
analyzing a crate or emulating the compiler in-process (e.g. the RLS or rustdoc).
For those using `rustc` as a library, the [`rustc_interface::run_compiler()`][i_rc]
function is the main entrypoint to the compiler. It takes a configuration for the compiler