Key points from discussion from this morning:

1. Assume all non-ambient members of non-const enums are computed (even those initialized with literals), both for inlining purposes and for .d.ts generation purposes
2. Continue to aggressively compute initializer expressions in both const and non-const enums
3. Ambient non-const enums preserve existing behavior (computed iff there is no initializer)
4. Continue to have --preserveConstEnums flag, which causes emit of the lookup object for const enums but does not change inlining

Tag @ahejlsberg