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//@ run-pass
//! Test that types are normalized in an instance body.
//@ 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)]
extern crate rustc_middle;
#[macro_use]
extern crate rustc_smir;
extern crate rustc_driver;
extern crate rustc_interface;
extern crate stable_mir;
use mir::mono::Instance;
use ty::{Ty, TyKind, RigidTy};
use rustc_smir::rustc_internal;
use stable_mir::*;
use std::io::Write;
use std::ops::ControlFlow;
const CRATE_NAME: &str = "input";
/// This function uses the Stable MIR APIs to get information about the test crate.
fn test_stable_mir() -> ControlFlow<()> {
let items = stable_mir::all_local_items();
// Get all items and split generic vs monomorphic items.
let instances: Vec<_> =
items.into_iter().filter_map(|item| (!item.requires_monomorphization()).then(|| {
Instance::try_from(item).unwrap()
})).collect();
assert_eq!(instances.len(), 1, "Expected one constant");
for instance in instances {
check_ty(instance.ty());
}
ControlFlow::Continue(())
}
fn check_ty(ty: Ty) {
match ty.kind() {
TyKind::RigidTy(RigidTy::Adt(def, args)) if def.kind().is_struct() => {
// Ensure field type is also normalized
def.variants_iter().next().unwrap().fields().into_iter().for_each(|f| {
check_ty(f.ty_with_args(&args))
});
}
TyKind::RigidTy(RigidTy::Uint(..)) => {}
kind => unreachable!("Unexpected kind: {kind:?}")
}
}
/// 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 = "normalization_input.rs";
generate_input(&path).unwrap();
let args = vec![
"rustc".to_string(),
"-Cpanic=abort".to_string(),
"--crate-type=lib".to_string(),
"--crate-name".to_string(),
CRATE_NAME.to_string(),
path.to_string(),
];
run!(args, test_stable_mir).unwrap();
}
fn generate_input(path: &str) -> std::io::Result<()> {
let mut file = std::fs::File::create(path)?;
write!(
file,
r#"
pub trait Primitive {{
type Base;
}}
impl Primitive for char {{
type Base = u32;
}}
pub struct Wrapper<T: Primitive>(T::Base);
pub type WrapperChar = Wrapper<char>;
pub const NULL_CHAR: WrapperChar = Wrapper::<char>(0);
"#
)?;
Ok(())
}
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