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//@ run-pass
//! Test that users are able to use serialize stable MIR constructs.
//@ ignore-stage1
//@ ignore-cross-compile
//@ ignore-remote
//@ edition: 2021
#![feature(rustc_private)]
#![feature(assert_matches)]
extern crate rustc_driver;
extern crate rustc_interface;
extern crate rustc_middle;
extern crate serde;
extern crate serde_json;
#[macro_use]
extern crate rustc_public;
use rustc_middle::ty::TyCtxt;
use serde_json::to_string;
use rustc_public::mir::Body;
use std::io::{BufWriter, Write};
use std::ops::ControlFlow;
const CRATE_NAME: &str = "input";
fn serialize_to_json(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
let path = "output.json";
let mut writer = BufWriter::new(std::fs::File::create(path).expect("Failed to create path"));
let local_crate = rustc_public::local_crate();
let items: Vec<Body> =
rustc_public::all_local_items().iter().map(|item| item.expect_body()).collect();
let crate_data = (local_crate.name, items);
writer
.write_all(to_string(&crate_data).expect("serde_json failed").as_bytes())
.expect("JSON serialization failed");
ControlFlow::Continue(())
}
/// This test will generate and analyze a dummy crate using the stable mir.
/// For that, it will first write the dummy crate into a file.
/// Then it will create a `RustcPublic` using custom arguments and then
/// it will run the compiler.
fn main() {
let path = "internal_input.rs";
generate_input(&path).unwrap();
let args = &[
"rustc".to_string(),
"--crate-name".to_string(),
CRATE_NAME.to_string(),
path.to_string(),
];
run_with_tcx!(args, serialize_to_json).unwrap();
}
fn generate_input(path: &str) -> std::io::Result<()> {
let mut file = std::fs::File::create(path)?;
write!(
file,
r#"
pub fn main() {{
}}
"#
)?;
Ok(())
}
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