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This commit is contained in:
Niko Matsakis 2015-08-21 15:34:10 -04:00
parent 57909f7068
commit 81eab1cab6
1 changed files with 6 additions and 1 deletions
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7
src/librustc/middle/free_region.rs
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@ -8,7 +8,12 @@
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! This file defines
//! This file handles the relationships between free regions --
//! meaning lifetime parameters. Ordinarily, free regions are
//! unrelated to one another, but they can be related vai implied or
//! explicit bounds. In that case, we track the bounds using the
//! `TransitiveRelation` type and use that to decide when one free
//! region outlives another and so forth.
use middle::ty::{self, FreeRegion, Region};
use middle::wf::ImpliedBound;