---

yaml
---
r: 277835
b: refs/heads/try
c: 0142336
h: refs/heads/master
i:
  277833: f050b03
  277831: 0a89c35

Author: michaelwoerister

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: 6dbb0e86aec11050480beb76eade6fb805010ba7
 refs/heads/snap-stage3: 235d77457d80b549dad3ac36d94f235208a1eafb
-refs/heads/try: a8e34dfc29df9ca817e9d1e91f3e49f6d405fe28
+refs/heads/try: 0142336a2a447e9883ae4dd6db98354154ba08e3
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try/src/librustc_trans/context.rs

@@ -190,6 +190,9 @@ impl<'tcx> DepTrackingMapConfig for TraitSelectionCache<'tcx> {
     }
 }
 
+/// This list owns a number of LocalCrateContexts and binds them to their common
+/// SharedCrateContext. This type just exists as a convenience, something to
+/// pass around all LocalCrateContexts with and get an iterator over them.
 pub struct CrateContextList<'a, 'tcx: 'a> {
     shared: &'a SharedCrateContext<'a, 'tcx>,
     local_ccxs: Vec<LocalCrateContext<'tcx>>,
@@ -229,6 +232,9 @@ impl<'a, 'tcx: 'a> CrateContextList<'a, 'tcx> {
     }
 }
 
+/// A CrateContext value binds together one LocalCrateContext with the
+/// SharedCrateContext. It exists as a convenience wrapper, so we don't have to
+/// pass around (SharedCrateContext, LocalCrateContext) tuples all over trans.
 pub struct CrateContext<'a, 'tcx: 'a> {
     shared: &'a SharedCrateContext<'a, 'tcx>,
     local_ccxs: &'a [LocalCrateContext<'tcx>],