1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
// Tested with nightly-2025-03-28
#![feature(rustc_private)]
extern crate rustc_driver;
extern crate rustc_error_codes;
extern crate rustc_errors;
extern crate rustc_hash;
extern crate rustc_hir;
extern crate rustc_interface;
extern crate rustc_session;
extern crate rustc_span;
use rustc_errors::registry;
use rustc_hash::FxHashMap;
use rustc_session::config;
fn main() {
let config = rustc_interface::Config {
// Command line options
opts: config::Options::default(),
// cfg! configuration in addition to the default ones
crate_cfg: Vec::new(), // FxHashSet<(String, Option<String>)>
crate_check_cfg: Vec::new(), // CheckCfg
input: config::Input::Str {
name: rustc_span::FileName::Custom("main.rs".into()),
input: r#"
static HELLO: &str = "Hello, world!";
fn main() {
println!("{HELLO}");
}
"#
.into(),
},
output_dir: None, // Option<PathBuf>
output_file: None, // Option<PathBuf>
file_loader: None, // Option<Box<dyn FileLoader + Send + Sync>>
locale_resources: rustc_driver::DEFAULT_LOCALE_RESOURCES.to_owned(),
lint_caps: FxHashMap::default(), // FxHashMap<lint::LintId, lint::Level>
// This is a callback from the driver that is called when [`ParseSess`] is created.
psess_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.
//
// Note that if you find a Some here you probably want to call that function in the new
// function being registered.
register_lints: None, // Option<Box<dyn Fn(&Session, &mut LintStore) + Send + Sync>>
// This is a callback from the driver that is called just after we have populated
// the list of queries.
//
// The second parameter is local providers and the third parameter is external providers.
override_queries: None, // Option<fn(&Session, &mut ty::query::Providers<'_>, &mut ty::query::Providers<'_>)>
// Registry of diagnostics codes.
registry: registry::Registry::new(rustc_errors::codes::DIAGNOSTICS),
make_codegen_backend: None,
expanded_args: Vec::new(),
ice_file: None,
hash_untracked_state: None,
using_internal_features: &rustc_driver::USING_INTERNAL_FEATURES,
};
rustc_interface::run_compiler(config, |compiler| {
// Parse the program and print the syntax tree.
let krate = rustc_interface::passes::parse(&compiler.sess);
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_free_items() {
let item = tcx.hir_item(id);
match item.kind {
rustc_hir::ItemKind::Static(ident, ..)
| rustc_hir::ItemKind::Fn { ident, .. } => {
let ty = tcx.type_of(item.hir_id().owner.def_id);
println!("{ident:?}:\t{ty:?}")
}
_ => (),
}
}
});
});
}
|
