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Rollup merge of rust-lang#119790 - celinval:smir-all-traits, r=oli-obk Fix all_trait* methods to return all traits available in StableMIR Also provide a mechanism to retrieve traits and implementations for a given crate. This fixes rust-lang/project-stable-mir#37
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| // 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)] | ||
|
|
||
| extern crate rustc_middle; | ||
| #[macro_use] | ||
| extern crate rustc_smir; | ||
| extern crate rustc_driver; | ||
| extern crate rustc_interface; | ||
| extern crate stable_mir; | ||
|
|
||
| use rustc_middle::ty::TyCtxt; | ||
| 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"; | ||
|
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| /// 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(()) | ||
| } |