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| author | Alex Crichton <alex@alexcrichton.com> | 2017-08-25 07:41:30 -0700 |
|---|---|---|
| committer | Alex Crichton <alex@alexcrichton.com> | 2017-08-25 07:41:30 -0700 |
| commit | b4c54715cddc8f2e3fc8b420cc7c93ef55ae0d33 (patch) | |
| tree | 7a03b20c79cd33584d509faaf6058374e9a8bef7 | |
| parent | 1917ffe314a0daf7a5df9c0186c05b22a5f89d59 (diff) | |
| download | rust-b4c54715cddc8f2e3fc8b420cc7c93ef55ae0d33.tar.gz rust-b4c54715cddc8f2e3fc8b420cc7c93ef55ae0d33.zip | |
Comment about generators and drops
| -rw-r--r-- | src/librustc/ty/util.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/librustc/ty/util.rs b/src/librustc/ty/util.rs index 82810b7aae1..3adad7cf0f8 100644 --- a/src/librustc/ty/util.rs +++ b/src/librustc/ty/util.rs @@ -1124,6 +1124,9 @@ fn needs_drop_raw<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, ty::TyClosure(def_id, ref substs) => substs.upvar_tys(def_id, tcx).any(needs_drop), + // Pessimistically assume that all generators will require destructors + // as we don't know if a destructor is a noop or not until after the MIR + // state transformation pass ty::TyGenerator(..) => true, ty::TyTuple(ref tys, _) => tys.iter().cloned().any(needs_drop), |