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//@ run-pass
//! Test that users are able to use retrieve internal constructs from stable ones to help with
//! the migration.
//@ ignore-stage1
//@ ignore-cross-compile
//@ ignore-remote
//@ ignore-windows-gnu mingw has troubles with linking https://github.com/rust-lang/rust/pull/116837
//@ edition: 2021
#![feature(rustc_private)]
#![feature(assert_matches)]
#![feature(control_flow_enum)]
#[macro_use]
extern crate rustc_smir;
extern crate rustc_driver;
extern crate rustc_interface;
extern crate rustc_middle;
extern crate stable_mir;
use rustc_middle::ty::TyCtxt;
use rustc_smir::rustc_internal;
use std::io::Write;
use std::ops::ControlFlow;
const CRATE_NAME: &str = "input";
fn test_translation(tcx: TyCtxt<'_>) -> ControlFlow<()> {
let main_fn = stable_mir::entry_fn().unwrap();
let body = main_fn.body();
let orig_ty = body.locals()[0].ty;
let rustc_ty = rustc_internal::internal(tcx, &orig_ty);
assert!(rustc_ty.is_unit());
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 `StableMir` using custom arguments and then
/// it will run the compiler.
fn main() {
let path = "internal_input.rs";
generate_input(&path).unwrap();
let args = vec![
"rustc".to_string(),
"--crate-name".to_string(),
CRATE_NAME.to_string(),
path.to_string(),
];
run_with_tcx!(args, test_translation).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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