Pointer Reform: update @typeInfo

* add assertion for trying to do @typeInfo on global error set
 * remove TypeInfo.Slice
 * add TypeInfo.Pointer.Size with possible values
   - One
   - Many
   - Slice

See #770
d3693dca73Andrew Kelley committed on 6/6/2018, 4:39:39 AMparent76c8efd
5 files changedLine totals unavailable