2564811e7b
I added `tcx` argument to `internal` to force 'tcx to be the same lifetime as TyCtxt. The only other solution I could think is to change this function to be `unsafe`.
124 lines
3.8 KiB
Rust
124 lines
3.8 KiB
Rust
// run-pass
|
|
//! Test that users are able to retrieve information about trait declarations and implementations.
|
|
|
|
// 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 stable_mir;
|
|
|
|
use rustc_smir::rustc_internal;
|
|
use stable_mir::CrateDef;
|
|
use std::collections::HashSet;
|
|
use std::io::Write;
|
|
use std::ops::ControlFlow;
|
|
|
|
const CRATE_NAME: &str = "trait_test";
|
|
|
|
/// This function uses the Stable MIR APIs to get information about the test crate.
|
|
fn test_traits() -> ControlFlow<()> {
|
|
let local_crate = stable_mir::local_crate();
|
|
let local_traits = local_crate.trait_decls();
|
|
assert_eq!(local_traits.len(), 1, "Expected `Max` trait, but found {:?}", local_traits);
|
|
assert_eq!(&local_traits[0].name(), "Max");
|
|
|
|
let local_impls = local_crate.trait_impls();
|
|
let impl_names = local_impls.iter().map(|trait_impl| trait_impl.name()).collect::<HashSet<_>>();
|
|
assert_impl(&impl_names, "<Positive as Max>");
|
|
assert_impl(&impl_names, "<Positive as std::marker::Copy>");
|
|
assert_impl(&impl_names, "<Positive as std::clone::Clone>");
|
|
assert_impl(&impl_names, "<Positive as std::fmt::Debug>");
|
|
assert_impl(&impl_names, "<Positive as std::cmp::PartialEq>");
|
|
assert_impl(&impl_names, "<Positive as std::cmp::Eq>");
|
|
assert_impl(&impl_names, "<Positive as std::convert::TryFrom<u64>>");
|
|
assert_impl(&impl_names, "<u64 as Max>");
|
|
assert_impl(&impl_names, "<impl std::convert::From<Positive> for u64>");
|
|
|
|
let all_traits = stable_mir::all_trait_decls();
|
|
assert!(all_traits.len() > local_traits.len());
|
|
assert!(
|
|
local_traits.iter().all(|t| all_traits.contains(t)),
|
|
"Local: {local_traits:#?}, All: {all_traits:#?}"
|
|
);
|
|
|
|
let all_impls = stable_mir::all_trait_impls();
|
|
assert!(all_impls.len() > local_impls.len());
|
|
assert!(
|
|
local_impls.iter().all(|t| all_impls.contains(t)),
|
|
"Local: {local_impls:#?}, All: {all_impls:#?}"
|
|
);
|
|
ControlFlow::Continue(())
|
|
}
|
|
|
|
fn assert_impl(impl_names: &HashSet<String>, target: &str) {
|
|
assert!(
|
|
impl_names.contains(target),
|
|
"Failed to find `{target}`. Implementations available: {impl_names:?}",
|
|
);
|
|
}
|
|
|
|
/// 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 = "trait_queries.rs";
|
|
generate_input(&path).unwrap();
|
|
let args = vec![
|
|
"rustc".to_string(),
|
|
"--crate-type=lib".to_string(),
|
|
"--crate-name".to_string(),
|
|
CRATE_NAME.to_string(),
|
|
path.to_string(),
|
|
];
|
|
run!(args, test_traits).unwrap();
|
|
}
|
|
|
|
fn generate_input(path: &str) -> std::io::Result<()> {
|
|
let mut file = std::fs::File::create(path)?;
|
|
write!(
|
|
file,
|
|
r#"
|
|
use std::convert::TryFrom;
|
|
|
|
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
|
|
pub struct Positive(u64);
|
|
|
|
impl TryFrom<u64> for Positive {{
|
|
type Error = ();
|
|
fn try_from(val: u64) -> Result<Positive, Self::Error> {{
|
|
if val > 0 {{ Ok(Positive(val)) }} else {{ Err(()) }}
|
|
}}
|
|
}}
|
|
|
|
impl From<Positive> for u64 {{
|
|
fn from(val: Positive) -> u64 {{ val.0 }}
|
|
}}
|
|
|
|
pub trait Max {{
|
|
fn is_max(&self) -> bool;
|
|
}}
|
|
|
|
impl Max for u64 {{
|
|
fn is_max(&self) -> bool {{ *self == u64::MAX }}
|
|
}}
|
|
|
|
impl Max for Positive {{
|
|
fn is_max(&self) -> bool {{ self.0.is_max() }}
|
|
}}
|
|
|
|
"#
|
|
)?;
|
|
Ok(())
|
|
}
|