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Fix Chalk environments

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The clauses need to be wrapped in `FromEnv` clauses for elaboration (i.e.
things like inferring `T: Clone` from `T: Copy`) to work correctly.
This commit is contained in:
Florian Diebold 2019-09-07 16:30:37 +02:00
parent a1776b27c7
commit 9db34eec20
2 changed files with 4 additions and 3 deletions
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4
crates/ra_hir/src/ty/tests.rs
View file

@ -3687,9 +3687,9 @@ fn test<T: Trait1, U: Trait2>(x: T, y: U) {
[188; 189) 'y': U
[194; 223) '{ ...o(); }': ()
[200; 201) 'x': T
[200; 207) 'x.foo()': {unknown}
[200; 207) 'x.foo()': u32
[213; 214) 'y': U
[213; 220) 'y.foo()': {unknown}
[213; 220) 'y.foo()': u32
"###
);
}

3
crates/ra_hir/src/ty/traits/chalk.rs
View file

@ -314,7 +314,8 @@ impl ToChalk for Arc<super::TraitEnvironment> {
// for env, we just ignore errors
continue;
}
clauses.push(pred.clone().to_chalk(db).cast());
let program_clause: chalk_ir::ProgramClause = pred.clone().to_chalk(db).cast();
clauses.push(program_clause.into_from_env_clause());
}
chalk_ir::Environment::new().add_clauses(clauses)
}