96 lines
2.6 KiB
Rust
96 lines
2.6 KiB
Rust
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//@ run-pass
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//! Test that types are normalized in an instance body.
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//@ ignore-stage1
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//@ ignore-cross-compile
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//@ ignore-remote
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//@ ignore-windows-gnu mingw has troubles with linking https://github.com/rust-lang/rust/pull/116837
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//@ edition: 2021
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#![feature(rustc_private)]
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#[macro_use]
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extern crate rustc_smir;
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extern crate rustc_driver;
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extern crate rustc_interface;
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extern crate stable_mir;
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use mir::mono::Instance;
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use ty::{Ty, TyKind, RigidTy};
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use rustc_smir::rustc_internal;
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use stable_mir::*;
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use std::io::Write;
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use std::ops::ControlFlow;
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const CRATE_NAME: &str = "input";
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/// This function uses the Stable MIR APIs to get information about the test crate.
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fn test_stable_mir() -> ControlFlow<()> {
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let items = stable_mir::all_local_items();
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// Get all items and split generic vs monomorphic items.
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let instances: Vec<_> =
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items.into_iter().filter_map(|item| (!item.requires_monomorphization()).then(|| {
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Instance::try_from(item).unwrap()
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})).collect();
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assert_eq!(instances.len(), 1, "Expected one constant");
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for instance in instances {
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check_ty(instance.ty());
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}
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ControlFlow::Continue(())
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}
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fn check_ty(ty: Ty) {
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match ty.kind() {
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TyKind::RigidTy(RigidTy::Adt(def, args)) if def.kind().is_struct() => {
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// Ensure field type is also normalized
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def.variants_iter().next().unwrap().fields().into_iter().for_each(|f| {
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check_ty(f.ty_with_args(&args))
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});
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}
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TyKind::RigidTy(RigidTy::Uint(..)) => {}
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kind => unreachable!("Unexpected kind: {kind:?}")
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}
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}
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/// This test will generate and analyze a dummy crate using the stable mir.
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/// For that, it will first write the dummy crate into a file.
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/// Then it will create a `StableMir` using custom arguments and then
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/// it will run the compiler.
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fn main() {
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let path = "normalization_input.rs";
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generate_input(&path).unwrap();
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let args = vec![
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"rustc".to_string(),
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"-Cpanic=abort".to_string(),
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"--crate-type=lib".to_string(),
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"--crate-name".to_string(),
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CRATE_NAME.to_string(),
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path.to_string(),
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];
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run!(args, test_stable_mir).unwrap();
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}
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fn generate_input(path: &str) -> std::io::Result<()> {
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let mut file = std::fs::File::create(path)?;
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write!(
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file,
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r#"
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pub trait Primitive {{
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type Base;
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}}
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impl Primitive for char {{
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type Base = u32;
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}}
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pub struct Wrapper<T: Primitive>(T::Base);
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pub type WrapperChar = Wrapper<char>;
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pub const NULL_CHAR: WrapperChar = Wrapper::<char>(0);
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"#
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)?;
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Ok(())
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}
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