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Add comments about outlives_env

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Santiago Pastorino 2022-02-10 16:38:27 -03:00
parent ff11dfd71d
commit 45983fecff
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7
compiler/rustc_trait_selection/src/traits/coherence.rs
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@ -392,6 +392,13 @@ fn negative_impl_exists<'cx, 'tcx>(
} }
let mut outlives_env = OutlivesEnvironment::new(param_env); let mut outlives_env = OutlivesEnvironment::new(param_env);
// FIXME -- add "assumed to be well formed" types into the `outlives_env`
// "Save" the accumulated implied bounds into the outlives environment
// (due to the FIXME above, there aren't any, but this step is still needed).
// The "body id" is given as `CRATE_HIR_ID`, which is the same body-id used
// by the "dummy" causes elsewhere (body-id is only relevant when checking
// function bodies with closures).
outlives_env.save_implied_bounds(CRATE_HIR_ID); outlives_env.save_implied_bounds(CRATE_HIR_ID);
infcx.process_registered_region_obligations( infcx.process_registered_region_obligations(