Trait rustc::infer::outlives::free_region_map::FreeRegionRelations [] [src]

pub trait FreeRegionRelations<'tcx> {
    fn sub_free_regions(
        &self,
        shorter: Region<'tcx>,
        longer: Region<'tcx>
    ) -> bool; }
🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

The NLL region handling code represents free region relations in a slightly different way; this trait allows functions to be abstract over which version is in use.

Required Methods

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Tests whether r_a <= r_b. Both must be free regions or 'static.

Implementors